环境监测6x6大屏下发指令

HELP.md

+# Getting Started
+
+### Reference Documentation
+For further reference, please consider the following sections:
+
+* [Official Apache Maven documentation](https://maven.apache.org/guides/index.html)
+* [Spring Boot Maven Plugin Reference Guide](https://docs.spring.io/spring-boot/docs/2.3.3.RELEASE/maven-plugin/reference/html/)
+* [Create an OCI image](https://docs.spring.io/spring-boot/docs/2.3.3.RELEASE/maven-plugin/reference/html/#build-image)
+

README.md

+# 下发控制6x6大屏
+
+#### 服务端：
+
+​		监听端口: 9999
+
+​		连接方式: 192.168.1.49:9999		
+
+
+
+
+
+#### 请求接口 （程序启动占用9998端口）：
+
+##### 下发到大屏数据
+
+##### url:  http://192.168.1.49:9998/display
+
+| 参数名称 | 参数值                                       |
+| -------- | -------------------------------------------- |
+| key      | 313233343536373839383736353433（hex string） |
+| code     | 03 (string)                                  |
+| x        | 54（hex string）                             |
+| y        | 5 （hex string）                             |
+| font     | 30  (string)                                 |
+| content  | 温度 (string)                                |
+
+
+
+##### 清屏指令
+
+##### url:  http://192.168.1.49:9998/clear
+
+| 参数名称 | 参数值                                       |
+| -------- | -------------------------------------------- |
+| key      | 313233343536373839383736353433（hex string） |
+| code     | 03(string)                                   |
+

mvnw

+#!/bin/sh
+# ----------------------------------------------------------------------------
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#    https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+# ----------------------------------------------------------------------------
+
+# ----------------------------------------------------------------------------
+# Maven Start Up Batch script
+#
+# Required ENV vars:
+# ------------------
+#   JAVA_HOME - location of a JDK home dir
+#
+# Optional ENV vars
+# -----------------
+#   M2_HOME - location of maven2's installed home dir
+#   MAVEN_OPTS - parameters passed to the Java VM when running Maven
+#     e.g. to debug Maven itself, use
+#       set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+#   MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+# ----------------------------------------------------------------------------
+
+if [ -z "$MAVEN_SKIP_RC" ] ; then
+
+  if [ -f /etc/mavenrc ] ; then
+    . /etc/mavenrc
+  fi
+
+  if [ -f "$HOME/.mavenrc" ] ; then
+    . "$HOME/.mavenrc"
+  fi
+
+fi
+
+# OS specific support.  $var _must_ be set to either true or false.
+cygwin=false;
+darwin=false;
+mingw=false
+case "`uname`" in
+  CYGWIN*) cygwin=true ;;
+  MINGW*) mingw=true;;
+  Darwin*) darwin=true
+    # Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home
+    # See https://developer.apple.com/library/mac/qa/qa1170/_index.html
+    if [ -z "$JAVA_HOME" ]; then
+      if [ -x "/usr/libexec/java_home" ]; then
+        export JAVA_HOME="`/usr/libexec/java_home`"
+      else
+        export JAVA_HOME="/Library/Java/Home"
+      fi
+    fi
+    ;;
+esac
+
+if [ -z "$JAVA_HOME" ] ; then
+  if [ -r /etc/gentoo-release ] ; then
+    JAVA_HOME=`java-config --jre-home`
+  fi
+fi
+
+if [ -z "$M2_HOME" ] ; then
+  ## resolve links - $0 may be a link to maven's home
+  PRG="$0"
+
+  # need this for relative symlinks
+  while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+      PRG="$link"
+    else
+      PRG="`dirname "$PRG"`/$link"
+    fi
+  done
+
+  saveddir=`pwd`
+
+  M2_HOME=`dirname "$PRG"`/..
+
+  # make it fully qualified
+  M2_HOME=`cd "$M2_HOME" && pwd`
+
+  cd "$saveddir"
+  # echo Using m2 at $M2_HOME
+fi
+
+# For Cygwin, ensure paths are in UNIX format before anything is touched
+if $cygwin ; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME=`cygpath --unix "$M2_HOME"`
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=`cygpath --path --unix "$CLASSPATH"`
+fi
+
+# For Mingw, ensure paths are in UNIX format before anything is touched
+if $mingw ; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME="`(cd "$M2_HOME"; pwd)`"
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME="`(cd "$JAVA_HOME"; pwd)`"
+fi
+
+if [ -z "$JAVA_HOME" ]; then
+  javaExecutable="`which javac`"
+  if [ -n "$javaExecutable" ] && ! [ "`expr \"$javaExecutable\" : '\([^ ]*\)'`" = "no" ]; then
+    # readlink(1) is not available as standard on Solaris 10.
+    readLink=`which readlink`
+    if [ ! `expr "$readLink" : '\([^ ]*\)'` = "no" ]; then
+      if $darwin ; then
+        javaHome="`dirname \"$javaExecutable\"`"
+        javaExecutable="`cd \"$javaHome\" && pwd -P`/javac"
+      else
+        javaExecutable="`readlink -f \"$javaExecutable\"`"
+      fi
+      javaHome="`dirname \"$javaExecutable\"`"
+      javaHome=`expr "$javaHome" : '\(.*\)/bin'`
+      JAVA_HOME="$javaHome"
+      export JAVA_HOME
+    fi
+  fi
+fi
+
+if [ -z "$JAVACMD" ] ; then
+  if [ -n "$JAVA_HOME"  ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+      # IBM's JDK on AIX uses strange locations for the executables
+      JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+      JAVACMD="$JAVA_HOME/bin/java"
+    fi
+  else
+    JAVACMD="`which java`"
+  fi
+fi
+
+if [ ! -x "$JAVACMD" ] ; then
+  echo "Error: JAVA_HOME is not defined correctly." >&2
+  echo "  We cannot execute $JAVACMD" >&2
+  exit 1
+fi
+
+if [ -z "$JAVA_HOME" ] ; then
+  echo "Warning: JAVA_HOME environment variable is not set."
+fi
+
+CLASSWORLDS_LAUNCHER=org.codehaus.plexus.classworlds.launcher.Launcher
+
+# traverses directory structure from process work directory to filesystem root
+# first directory with .mvn subdirectory is considered project base directory
+find_maven_basedir() {
+
+  if [ -z "$1" ]
+  then
+    echo "Path not specified to find_maven_basedir"
+    return 1
+  fi
+
+  basedir="$1"
+  wdir="$1"
+  while [ "$wdir" != '/' ] ; do
+    if [ -d "$wdir"/.mvn ] ; then
+      basedir=$wdir
+      break
+    fi
+    # workaround for JBEAP-8937 (on Solaris 10/Sparc)
+    if [ -d "${wdir}" ]; then
+      wdir=`cd "$wdir/.."; pwd`
+    fi
+    # end of workaround
+  done
+  echo "${basedir}"
+}
+
+# concatenates all lines of a file
+concat_lines() {
+  if [ -f "$1" ]; then
+    echo "$(tr -s '\n' ' ' < "$1")"
+  fi
+}
+
+BASE_DIR=`find_maven_basedir "$(pwd)"`
+if [ -z "$BASE_DIR" ]; then
+  exit 1;
+fi
+
+##########################################################################################
+# Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+# This allows using the maven wrapper in projects that prohibit checking in binary data.
+##########################################################################################
+if [ -r "$BASE_DIR/.mvn/wrapper/maven-wrapper.jar" ]; then
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Found .mvn/wrapper/maven-wrapper.jar"
+    fi
+else
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Couldn't find .mvn/wrapper/maven-wrapper.jar, downloading it ..."
+    fi
+    if [ -n "$MVNW_REPOURL" ]; then
+      jarUrl="$MVNW_REPOURL/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+    else
+      jarUrl="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+    fi
+    while IFS="=" read key value; do
+      case "$key" in (wrapperUrl) jarUrl="$value"; break ;;
+      esac
+    done < "$BASE_DIR/.mvn/wrapper/maven-wrapper.properties"
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Downloading from: $jarUrl"
+    fi
+    wrapperJarPath="$BASE_DIR/.mvn/wrapper/maven-wrapper.jar"
+    if $cygwin; then
+      wrapperJarPath=`cygpath --path --windows "$wrapperJarPath"`
+    fi
+
+    if command -v wget > /dev/null; then
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Found wget ... using wget"
+        fi
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            wget "$jarUrl" -O "$wrapperJarPath"
+        else
+            wget --http-user=$MVNW_USERNAME --http-password=$MVNW_PASSWORD "$jarUrl" -O "$wrapperJarPath"
+        fi
+    elif command -v curl > /dev/null; then
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Found curl ... using curl"
+        fi
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            curl -o "$wrapperJarPath" "$jarUrl" -f
+        else
+            curl --user $MVNW_USERNAME:$MVNW_PASSWORD -o "$wrapperJarPath" "$jarUrl" -f
+        fi
+
+    else
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Falling back to using Java to download"
+        fi
+        javaClass="$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.java"
+        # For Cygwin, switch paths to Windows format before running javac
+        if $cygwin; then
+          javaClass=`cygpath --path --windows "$javaClass"`
+        fi
+        if [ -e "$javaClass" ]; then
+            if [ ! -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
+                if [ "$MVNW_VERBOSE" = true ]; then
+                  echo " - Compiling MavenWrapperDownloader.java ..."
+                fi
+                # Compiling the Java class
+                ("$JAVA_HOME/bin/javac" "$javaClass")
+            fi
+            if [ -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
+                # Running the downloader
+                if [ "$MVNW_VERBOSE" = true ]; then
+                  echo " - Running MavenWrapperDownloader.java ..."
+                fi
+                ("$JAVA_HOME/bin/java" -cp .mvn/wrapper MavenWrapperDownloader "$MAVEN_PROJECTBASEDIR")
+            fi
+        fi
+    fi
+fi
+##########################################################################################
+# End of extension
+##########################################################################################
+
+export MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"}
+if [ "$MVNW_VERBOSE" = true ]; then
+  echo $MAVEN_PROJECTBASEDIR
+fi
+MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS"
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME=`cygpath --path --windows "$M2_HOME"`
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=`cygpath --path --windows "$CLASSPATH"`
+  [ -n "$MAVEN_PROJECTBASEDIR" ] &&
+    MAVEN_PROJECTBASEDIR=`cygpath --path --windows "$MAVEN_PROJECTBASEDIR"`
+fi
+
+# Provide a "standardized" way to retrieve the CLI args that will
+# work with both Windows and non-Windows executions.
+MAVEN_CMD_LINE_ARGS="$MAVEN_CONFIG $@"
+export MAVEN_CMD_LINE_ARGS
+
+WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+exec "$JAVACMD" \
+  $MAVEN_OPTS \
+  -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \
+  "-Dmaven.home=${M2_HOME}" "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \
+  ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@"

mvnw.cmd

+@REM ----------------------------------------------------------------------------
+@REM Licensed to the Apache Software Foundation (ASF) under one
+@REM or more contributor license agreements.  See the NOTICE file
+@REM distributed with this work for additional information
+@REM regarding copyright ownership.  The ASF licenses this file
+@REM to you under the Apache License, Version 2.0 (the
+@REM "License"); you may not use this file except in compliance
+@REM with the License.  You may obtain a copy of the License at
+@REM
+@REM    https://www.apache.org/licenses/LICENSE-2.0
+@REM
+@REM Unless required by applicable law or agreed to in writing,
+@REM software distributed under the License is distributed on an
+@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+@REM KIND, either express or implied.  See the License for the
+@REM specific language governing permissions and limitations
+@REM under the License.
+@REM ----------------------------------------------------------------------------
+
+@REM ----------------------------------------------------------------------------
+@REM Maven Start Up Batch script
+@REM
+@REM Required ENV vars:
+@REM JAVA_HOME - location of a JDK home dir
+@REM
+@REM Optional ENV vars
+@REM M2_HOME - location of maven2's installed home dir
+@REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands
+@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a keystroke before ending
+@REM MAVEN_OPTS - parameters passed to the Java VM when running Maven
+@REM     e.g. to debug Maven itself, use
+@REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+@REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+@REM ----------------------------------------------------------------------------
+
+@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on'
+@echo off
+@REM set title of command window
+title %0
+@REM enable echoing by setting MAVEN_BATCH_ECHO to 'on'
+@if "%MAVEN_BATCH_ECHO%" == "on"  echo %MAVEN_BATCH_ECHO%
+
+@REM set %HOME% to equivalent of $HOME
+if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%")
+
+@REM Execute a user defined script before this one
+if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre
+@REM check for pre script, once with legacy .bat ending and once with .cmd ending
+if exist "%HOME%\mavenrc_pre.bat" call "%HOME%\mavenrc_pre.bat"
+if exist "%HOME%\mavenrc_pre.cmd" call "%HOME%\mavenrc_pre.cmd"
+:skipRcPre
+
+@setlocal
+
+set ERROR_CODE=0
+
+@REM To isolate internal variables from possible post scripts, we use another setlocal
+@setlocal
+
+@REM ==== START VALIDATION ====
+if not "%JAVA_HOME%" == "" goto OkJHome
+
+echo.
+echo Error: JAVA_HOME not found in your environment. >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+:OkJHome
+if exist "%JAVA_HOME%\bin\java.exe" goto init
+
+echo.
+echo Error: JAVA_HOME is set to an invalid directory. >&2
+echo JAVA_HOME = "%JAVA_HOME%" >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+@REM ==== END VALIDATION ====
+
+:init
+
+@REM Find the project base dir, i.e. the directory that contains the folder ".mvn".
+@REM Fallback to current working directory if not found.
+
+set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR%
+IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir
+
+set EXEC_DIR=%CD%
+set WDIR=%EXEC_DIR%
+:findBaseDir
+IF EXIST "%WDIR%"\.mvn goto baseDirFound
+cd ..
+IF "%WDIR%"=="%CD%" goto baseDirNotFound
+set WDIR=%CD%
+goto findBaseDir
+
+:baseDirFound
+set MAVEN_PROJECTBASEDIR=%WDIR%
+cd "%EXEC_DIR%"
+goto endDetectBaseDir
+
+:baseDirNotFound
+set MAVEN_PROJECTBASEDIR=%EXEC_DIR%
+cd "%EXEC_DIR%"
+
+:endDetectBaseDir
+
+IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig
+
+@setlocal EnableExtensions EnableDelayedExpansion
+for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a
+@endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS%
+
+:endReadAdditionalConfig
+
+SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe"
+set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar"
+set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+set DOWNLOAD_URL="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+
+FOR /F "tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO (
+    IF "%%A"=="wrapperUrl" SET DOWNLOAD_URL=%%B
+)
+
+@REM Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+@REM This allows using the maven wrapper in projects that prohibit checking in binary data.
+if exist %WRAPPER_JAR% (
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Found %WRAPPER_JAR%
+    )
+) else (
+    if not "%MVNW_REPOURL%" == "" (
+        SET DOWNLOAD_URL="%MVNW_REPOURL%/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+    )
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Couldn't find %WRAPPER_JAR%, downloading it ...
+        echo Downloading from: %DOWNLOAD_URL%
+    )
+
+    powershell -Command "&{"^
+		"$webclient = new-object System.Net.WebClient;"^
+		"if (-not ([string]::IsNullOrEmpty('%MVNW_USERNAME%') -and [string]::IsNullOrEmpty('%MVNW_PASSWORD%'))) {"^
+		"$webclient.Credentials = new-object System.Net.NetworkCredential('%MVNW_USERNAME%', '%MVNW_PASSWORD%');"^
+		"}"^
+		"[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; $webclient.DownloadFile('%DOWNLOAD_URL%', '%WRAPPER_JAR%')"^
+		"}"
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Finished downloading %WRAPPER_JAR%
+    )
+)
+@REM End of extension
+
+@REM Provide a "standardized" way to retrieve the CLI args that will
+@REM work with both Windows and non-Windows executions.
+set MAVEN_CMD_LINE_ARGS=%*
+
+%MAVEN_JAVA_EXE% %JVM_CONFIG_MAVEN_PROPS% %MAVEN_OPTS% %MAVEN_DEBUG_OPTS% -classpath %WRAPPER_JAR% "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %*
+if ERRORLEVEL 1 goto error
+goto end
+
+:error
+set ERROR_CODE=1
+
+:end
+@endlocal & set ERROR_CODE=%ERROR_CODE%
+
+if not "%MAVEN_SKIP_RC%" == "" goto skipRcPost
+@REM check for post script, once with legacy .bat ending and once with .cmd ending
+if exist "%HOME%\mavenrc_post.bat" call "%HOME%\mavenrc_post.bat"
+if exist "%HOME%\mavenrc_post.cmd" call "%HOME%\mavenrc_post.cmd"
+:skipRcPost
+
+@REM pause the script if MAVEN_BATCH_PAUSE is set to 'on'
+if "%MAVEN_BATCH_PAUSE%" == "on" pause
+
+if "%MAVEN_TERMINATE_CMD%" == "on" exit %ERROR_CODE%
+
+exit /B %ERROR_CODE%

netty.iml

+<?xml version="1.0" encoding="UTF-8"?>
+<module org.jetbrains.idea.maven.project.MavenProjectsManager.isMavenModule="true" type="JAVA_MODULE" version="4">
+  <component name="FacetManager">
+    <facet type="Spring" name="Spring">
+      <configuration />
+    </facet>
+    <facet type="jpa" name="JPA">
+      <configuration>
+        <setting name="validation-enabled" value="true" />
+        <setting name="provider-name" value="Hibernate" />
+        <datasource-mapping>
+          <factory-entry name="entityManagerFactory" />
+        </datasource-mapping>
+        <naming-strategy-map />
+      </configuration>
+    </facet>
+    <facet type="web" name="Web">
+      <configuration>
+        <webroots />
+        <sourceRoots>
+          <root url="file://$MODULE_DIR$/src/main/java" />
+          <root url="file://$MODULE_DIR$/src/main/resources" />
+        </sourceRoots>
+      </configuration>
+    </facet>
+  </component>
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8">
+    <output url="file://$MODULE_DIR$/target/classes" />
+    <output-test url="file://$MODULE_DIR$/target/test-classes" />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/src/main/resources" type="java-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/src/test/java" isTestSource="true" />
+      <excludeFolder url="file://$MODULE_DIR$/target" />
+    </content>
+    <orderEntry type="jdk" jdkName="1.8" jdkType="JavaSDK" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" name="Maven: org.springframework.boot:spring-boot-starter:2.3.3.RELEASE" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework.boot:spring-boot:2.3.3.RELEASE" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework:spring-context:5.2.8.RELEASE" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework.boot:spring-boot-autoconfigure:2.3.3.RELEASE" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework.boot:spring-boot-starter-logging:2.3.3.RELEASE" level="project" />
+    <orderEntry type="library" name="Maven: ch.qos.logback:logback-classic:1.2.3" level="project" />
+    <orderEntry type="library" name="Maven: ch.qos.logback:logback-core:1.2.3" level="project" />
+    <orderEntry type="library" name="Maven: org.apache.logging.log4j:log4j-to-slf4j:2.13.3" level="project" />
+    <orderEntry type="library" name="Maven: org.apache.logging.log4j:log4j-api:2.13.3" level="project" />
+    <orderEntry type="library" name="Maven: org.slf4j:jul-to-slf4j:1.7.30" level="project" />
+    <orderEntry type="library" name="Maven: jakarta.annotation:jakarta.annotation-api:1.3.5" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework:spring-core:5.2.8.RELEASE" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework:spring-jcl:5.2.8.RELEASE" level="project" />
+    <orderEntry type="library" name="Maven: org.yaml:snakeyaml:1.26" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework.boot:spring-boot-starter-data-jpa:2.3.3.RELEASE" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework.boot:spring-boot-starter-aop:2.3.3.RELEASE" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework:spring-aop:5.2.8.RELEASE" level="project" />
+    <orderEntry type="library" name="Maven: org.aspectj:aspectjweaver:1.9.6" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework.boot:spring-boot-starter-jdbc:2.3.3.RELEASE" level="project" />
+    <orderEntry type="library" name="Maven: com.zaxxer:HikariCP:3.4.5" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework:spring-jdbc:5.2.8.RELEASE" level="project" />
+    <orderEntry type="library" name="Maven: jakarta.transaction:jakarta.transaction-api:1.3.3" level="project" />
+    <orderEntry type="library" name="Maven: jakarta.persistence:jakarta.persistence-api:2.2.3" level="project" />
+    <orderEntry type="library" name="Maven: org.hibernate:hibernate-core:5.4.20.Final" level="project" />
+    <orderEntry type="library" name="Maven: org.jboss.logging:jboss-logging:3.4.1.Final" level="project" />
+    <orderEntry type="library" name="Maven: org.javassist:javassist:3.24.0-GA" level="project" />
+    <orderEntry type="library" name="Maven: net.bytebuddy:byte-buddy:1.10.14" level="project" />
+    <orderEntry type="library" name="Maven: antlr:antlr:2.7.7" level="project" />
+    <orderEntry type="library" name="Maven: org.jboss:jandex:2.1.3.Final" level="project" />
+    <orderEntry type="library" name="Maven: com.fasterxml:classmate:1.5.1" level="project" />
+    <orderEntry type="library" name="Maven: org.dom4j:dom4j:2.1.3" level="project" />
+    <orderEntry type="library" name="Maven: org.hibernate.common:hibernate-commons-annotations:5.1.0.Final" level="project" />
+    <orderEntry type="library" name="Maven: org.glassfish.jaxb:jaxb-runtime:2.3.3" level="project" />
+    <orderEntry type="library" name="Maven: org.glassfish.jaxb:txw2:2.3.3" level="project" />
+    <orderEntry type="library" name="Maven: com.sun.istack:istack-commons-runtime:3.0.11" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Maven: com.sun.activation:jakarta.activation:1.2.2" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework.data:spring-data-jpa:2.3.3.RELEASE" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework.data:spring-data-commons:2.3.3.RELEASE" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework:spring-orm:5.2.8.RELEASE" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework:spring-tx:5.2.8.RELEASE" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework:spring-beans:5.2.8.RELEASE" level="project" />
+    <orderEntry type="library" name="Maven: org.slf4j:slf4j-api:1.7.30" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework:spring-aspects:5.2.8.RELEASE" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework.boot:spring-boot-starter-web:2.3.3.RELEASE" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework.boot:spring-boot-starter-json:2.3.3.RELEASE" level="project" />
+    <orderEntry type="library" name="Maven: com.fasterxml.jackson.core:jackson-databind:2.11.2" level="project" />
+    <orderEntry type="library" name="Maven: com.fasterxml.jackson.core:jackson-annotations:2.11.2" level="project" />
+    <orderEntry type="library" name="Maven: com.fasterxml.jackson.core:jackson-core:2.11.2" level="project" />
+    <orderEntry type="library" name="Maven: com.fasterxml.jackson.datatype:jackson-datatype-jdk8:2.11.2" level="project" />
+    <orderEntry type="library" name="Maven: com.fasterxml.jackson.datatype:jackson-datatype-jsr310:2.11.2" level="project" />
+    <orderEntry type="library" name="Maven: com.fasterxml.jackson.module:jackson-module-parameter-names:2.11.2" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework.boot:spring-boot-starter-tomcat:2.3.3.RELEASE" level="project" />
+    <orderEntry type="library" name="Maven: org.apache.tomcat.embed:tomcat-embed-core:9.0.37" level="project" />
+    <orderEntry type="library" name="Maven: org.glassfish:jakarta.el:3.0.3" level="project" />
+    <orderEntry type="library" name="Maven: org.apache.tomcat.embed:tomcat-embed-websocket:9.0.37" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework:spring-web:5.2.8.RELEASE" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework:spring-webmvc:5.2.8.RELEASE" level="project" />
+    <orderEntry type="library" name="Maven: org.springframework:spring-expression:5.2.8.RELEASE" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.springframework.boot:spring-boot-starter-test:2.3.3.RELEASE" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.springframework.boot:spring-boot-test:2.3.3.RELEASE" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.springframework.boot:spring-boot-test-autoconfigure:2.3.3.RELEASE" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: com.jayway.jsonpath:json-path:2.4.0" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: net.minidev:json-smart:2.3" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: net.minidev:accessors-smart:1.2" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.ow2.asm:asm:5.0.4" level="project" />
+    <orderEntry type="library" name="Maven: jakarta.xml.bind:jakarta.xml.bind-api:2.3.3" level="project" />
+    <orderEntry type="library" name="Maven: jakarta.activation:jakarta.activation-api:1.2.2" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.assertj:assertj-core:3.16.1" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.hamcrest:hamcrest:2.2" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.junit.jupiter:junit-jupiter:5.6.2" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.junit.jupiter:junit-jupiter-api:5.6.2" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.apiguardian:apiguardian-api:1.1.0" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.opentest4j:opentest4j:1.2.0" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.junit.platform:junit-platform-commons:1.6.2" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.junit.jupiter:junit-jupiter-params:5.6.2" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.junit.jupiter:junit-jupiter-engine:5.6.2" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.junit.platform:junit-platform-engine:1.6.2" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.mockito:mockito-core:3.3.3" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: net.bytebuddy:byte-buddy-agent:1.10.14" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.objenesis:objenesis:2.6" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.mockito:mockito-junit-jupiter:3.3.3" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.skyscreamer:jsonassert:1.5.0" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: com.vaadin.external.google:android-json:0.0.20131108.vaadin1" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.springframework:spring-test:5.2.8.RELEASE" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.xmlunit:xmlunit-core:2.7.0" level="project" />
+    <orderEntry type="library" name="Maven: io.netty:netty-all:4.1.43.Final" level="project" />
+    <orderEntry type="library" name="Maven: cn.hutool:hutool-all:5.4.0" level="project" />
+    <orderEntry type="library" name="Maven: org.postgresql:postgresql:42.2.12" level="project" />
+  </component>
+</module>
\ No newline at end of file

pom.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.3.3.RELEASE</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+    <groupId>com.gemho</groupId>
+    <artifactId>netty</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <name>netty</name>
+    <description>Demo project for Spring Boot</description>
+
+    <properties>
+        <java.version>1.8</java.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-data-jpa</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+            <exclusions>
+                <exclusion>
+                    <groupId>org.junit.vintage</groupId>
+                    <artifactId>junit-vintage-engine</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+        <!-- https://mvnrepository.com/artifact/io.netty/netty-all -->
+        <dependency>
+            <groupId>io.netty</groupId>
+            <artifactId>netty-all</artifactId>
+            <version>4.1.43.Final</version>
+        </dependency>
+        <dependency>
+            <groupId>cn.hutool</groupId>
+            <artifactId>hutool-all</artifactId>
+            <version>5.4.0</version>
+        </dependency>
+
+        <!-- https://mvnrepository.com/artifact/org.postgresql/postgresql -->
+        <dependency>
+            <groupId>org.postgresql</groupId>
+            <artifactId>postgresql</artifactId>
+            <version>42.2.12</version>
+        </dependency>
+
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

src/main/java/com/gemho/netty/NettyApplication.java

+package com.gemho.netty;
+
+import com.gemho.netty.controller.nettyServer;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class NettyApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(NettyApplication.class, args);
+        new nettyServer(9999);
+    }
+
+}

src/main/java/com/gemho/netty/controller/SocketController.java

+package com.gemho.netty.controller;
+
+import cn.hutool.json.JSONUtil;
+import com.gemho.netty.util.CRC16Util;
+import com.gemho.netty.util.MapUtils;
+import com.gemho.netty.util.ParamUtil;
+import com.gemho.netty.util.StringUtil;
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.LinkedHashMap;
+import java.util.Map;
+
+@RestController
+public class SocketController {
+
+
+    private static String CLEAR_CODE = "0000000400000650";
+
+    private static String DISPLAY_CODE = "0001";
+
+    // key:313233343536373839383736353433   16进制DTU码
+    // code: 03
+    @RequestMapping("/clear")
+    public String clearDiaplay(String key, String code) {
+        code = code + CLEAR_CODE;
+        int i = CRC16Util.calcCrc16(StringUtil.hexString2Bytes(code));
+        System.out.println("=============" + StringUtil.encodeHEX(i));
+        System.out.println("=============" + StringUtil.hexString2Bytes((code + StringUtil.encodeHEX(i)).toUpperCase()));
+        code = (code + StringUtil.encodeHEX(i)).toUpperCase();
+        // 内容封装
+        ByteBuf bufff = Unpooled.buffer();
+        //  bufff.clear();
+        bufff.writeBytes(StringUtil.hexString2Bytes(code));
+        // 获取通道
+        Channel mapChannel = MapUtils.getMapChannel(key);
+        mapChannel.writeAndFlush(bufff);
+        return "success";
+    }
+
+    // 01 00 01 00 0E 36 05 30 CE C2 B6 C8 B7 38
+    // key:313233343536373839383736353433   16进制DTU码
+    // code: 03
+    // x: 54  16进制
+    // y: 5   16禁止
+    // font:  30字体大小
+    // content: 温度
+    @RequestMapping("/display")
+    public String display(String key, String code, Integer x, Integer y, String font, String content) {
+        try{
+            // 指令处理
+            String xHex = Integer.toHexString(x).length() == 1? "0"+ Integer.toHexString(x) : Integer.toHexString(x);
+            String yHex = Integer.toHexString(y).length() == 1? "0"+ Integer.toHexString(y) : Integer.toHexString(y);
+            String contentByte = StringUtil.enUnicode(content);
+            byte[] contentB = StringUtil.hexString2Bytes(contentByte);
+            String lenHex = StringUtil.encodeHEX(contentB.length + 10);
+            lenHex = StringUtil.hightAddZero(lenHex);
+            code = code + DISPLAY_CODE + lenHex + xHex + yHex + font + StringUtil.bytesToHexString(contentB);
+            code = code + StringUtil.encodeHEX(CRC16Util.calcCrc16(StringUtil.hexString2Bytes(code)));
+            System.out.println("下发指令==============" + code.toUpperCase());
+            // 数据封装
+            ByteBuf bufff = Unpooled.buffer();
+            bufff.writeBytes(StringUtil.hexString2Bytes(code));
+            // 获取通道
+            Channel mapChannel = MapUtils.getMapChannel(key);
+            mapChannel.writeAndFlush(bufff);
+            // 执行失败使用
+            if (ParamUtil.findMap(mapChannel.remoteAddress()) == null) {
+                Map<Integer, ByteBuf> map = new LinkedHashMap<>();
+                map.put(1, bufff.retain());
+                ParamUtil.addMap(mapChannel.remoteAddress(), map);
+            }
+            return "success";
+        }catch(Exception e) {
+            e.printStackTrace();
+            return null;
+        }
+    }
+
+}

src/main/java/com/gemho/netty/controller/nettyHandler.java

+package com.gemho.netty.controller;
+
+import cn.hutool.json.JSONUtil;
+import com.gemho.netty.util.*;
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelInboundHandlerAdapter;
+
+import java.util.Map;
+import java.util.Set;
+
+public class nettyHandler extends ChannelInboundHandlerAdapter {
+
+    @Override
+    public void channelActive(ChannelHandlerContext ctx) throws Exception {
+        System.out.println("当前连接信息:" + ctx.channel().remoteAddress());
+    }
+
+    @Override
+    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
+        /*System.out.println(msg.toString() + "========================");
+        if (msg.toString().length() == 8) {
+            System.out.println("=====================1");
+            msg = StringUtil.bytesToHexString(msg.toString().getBytes());
+        }else {
+            System.out.println("=====================2");
+            msg = msg.toString();
+        }*/
+        System.out.println("=================" + StringUtil.bytesToHexString(StringUtil.hexString2Bytes(StringUtil.splitString(msg.toString()))));
+        if (msg.toString().length() == 30) {
+            MapUtils.addMap(msg.toString(), ctx.channel());
+        }else {
+            byte[] bys = StringUtil.hexString2Bytes(msg.toString());
+            int i = CRC16Util.calcCrc16(bys, 0, 6);
+            if (StringUtil.hightAddZero(Integer.toHexString(i).toUpperCase()).equals(StringUtil.bytesToHexString(bys).substring(12))){
+                System.out.println("CRC校验通过!");
+                /*src：byte源数组
+                srcPos：截取源byte数组起始位置（0位置有效）
+                dest,：byte目的数组（截取后存放的数组）
+                destPos：截取后存放的数组起始位置（0位置有效）
+                length：截取的数据长度*/
+                byte[] newBys = new byte[2];
+                System.arraycopy(bys, 3, newBys, 0, 2);
+                if ("0001".equals(StringUtil.bytesToHexString(newBys))) {
+                    System.out.println("正常. 大屏接收到数据");
+                } else {
+                    // 执行失败
+                    Map<Integer, ByteBuf> map = ParamUtil.findMap(ctx.channel().remoteAddress());
+                    if (map != null) {
+                        Set<Integer> integers = map.keySet();
+                        for (Integer key : integers) {
+                            for (int j = 0; j < 4 - key; j++) {
+                                if (key == 3) {
+                                    ParamUtil.removeMap(ctx.channel().remoteAddress());
+                                    System.out.println(ctx.channel().remoteAddress() + "错误. 大屏未接收到数据");
+                                    return ;
+                                }else {
+                                    ByteBuf byteBuf = map.get(key);
+                                    System.out.println("发送数据==============" + JSONUtil.toJsonStr(byteBuf));
+                                    ctx.channel().write(byteBuf.retain());
+                                    map.put(key+1, map.get(key).retain());
+                                    map.remove(ctx.channel().remoteAddress());
+                                    ParamUtil.updateMap(ctx.channel().remoteAddress(), map);
+                                    System.out.println("repeat......." + key);
+                                }
+                            }
+                        }
+                    }
+                   // System.out.println(ctx.channel().remoteAddress() + "错误. 大屏未接收到数据");
+                }
+            }else {
+                System.out.println("CRC校验失败！");
+            }
+        }
+    }
+
+    @Override
+    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
+        System.out.println("异常信息:" + cause.getMessage());
+    }
+
+    // 心跳处理
+    @Override
+    public void userEventTriggered(ChannelHandlerContext ctx, Object evt) throws Exception {
+
+    }
+
+
+
+
+}
\ No newline at end of file

src/main/java/com/gemho/netty/controller/nettyServer.java

+package com.gemho.netty.controller;
+
+import com.gemho.netty.util.DecodeUtil;
+import io.netty.bootstrap.ServerBootstrap;
+import io.netty.channel.ChannelInitializer;
+import io.netty.channel.ChannelOption;
+import io.netty.channel.nio.NioEventLoopGroup;
+import io.netty.channel.socket.SocketChannel;
+import io.netty.channel.socket.nio.NioServerSocketChannel;
+import io.netty.handler.codec.string.StringEncoder;
+import io.netty.util.CharsetUtil;
+
+public class nettyServer {
+
+    public nettyServer(int port) {
+        this.start(port);
+    }
+
+
+
+    public void start(int port)  {
+        System.out.println("启动成功, 当前监听: " + port);
+        ServerBootstrap b = new ServerBootstrap();
+        NioEventLoopGroup group = new NioEventLoopGroup();
+        b.group(group)
+                .channel(NioServerSocketChannel.class)
+                .childHandler(new ChannelInitializer<SocketChannel>() {
+                    @Override
+                    public void initChannel(SocketChannel ch)
+                            throws Exception {
+                        System.out.println("initChannel ch:" + ch);
+                        ch.pipeline()
+                                .addLast("decoder", new DecodeUtil())
+                                .addLast("encoder", new StringEncoder(CharsetUtil.UTF_8))
+                                .addLast("handler", new nettyHandler());
+                    }
+                })
+                .option(ChannelOption.SO_BACKLOG, 128) // determining the number of connections queued
+                .childOption(ChannelOption.SO_KEEPALIVE, Boolean.TRUE);
+
+        try{
+            b.bind(port).sync();
+        }catch(Exception e) {
+            e.printStackTrace();
+        }
+    }
+}

src/main/java/com/gemho/netty/util/CRC16Util.java

+package com.gemho.netty.util;
+
+/**
+ * @Author: liujing
+ * @Date: 2019/10/24 16:49
+ * @Version: 1.0
+ */
+public class CRC16Util {
+    static byte[] crc16_tab_h = { (byte) 0x00, (byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x00, (byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x00, (byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x00, (byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x00, (byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x00, (byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x00, (byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x01, (byte) 0xC0,
+            (byte) 0x80, (byte) 0x41, (byte) 0x00, (byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x00, (byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x00, (byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x00, (byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x00, (byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x00, (byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x00, (byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x00, (byte) 0xC1,
+            (byte) 0x81, (byte) 0x40, (byte) 0x00, (byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x00, (byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x00, (byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x00, (byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x00, (byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x00, (byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x00, (byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x01, (byte) 0xC0,
+            (byte) 0x80, (byte) 0x41, (byte) 0x00, (byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x00, (byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x00, (byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x00, (byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x00, (byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x00, (byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x00, (byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x00, (byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x01, (byte) 0xC0,
+            (byte) 0x80, (byte) 0x41, (byte) 0x00, (byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x00, (byte) 0xC1, (byte) 0x81, (byte) 0x40 };
+
+    static byte[] crc16_tab_l = { (byte) 0x00, (byte) 0xC0, (byte) 0xC1, (byte) 0x01, (byte) 0xC3, (byte) 0x03, (byte) 0x02, (byte) 0xC2, (byte) 0xC6, (byte) 0x06, (byte) 0x07, (byte) 0xC7, (byte) 0x05, (byte) 0xC5, (byte) 0xC4, (byte) 0x04, (byte) 0xCC, (byte) 0x0C, (byte) 0x0D, (byte) 0xCD, (byte) 0x0F, (byte) 0xCF, (byte) 0xCE, (byte) 0x0E, (byte) 0x0A, (byte) 0xCA, (byte) 0xCB, (byte) 0x0B, (byte) 0xC9, (byte) 0x09, (byte) 0x08, (byte) 0xC8, (byte) 0xD8, (byte) 0x18, (byte) 0x19, (byte) 0xD9, (byte) 0x1B, (byte) 0xDB, (byte) 0xDA, (byte) 0x1A, (byte) 0x1E, (byte) 0xDE, (byte) 0xDF, (byte) 0x1F, (byte) 0xDD, (byte) 0x1D, (byte) 0x1C, (byte) 0xDC, (byte) 0x14, (byte) 0xD4, (byte) 0xD5, (byte) 0x15, (byte) 0xD7, (byte) 0x17, (byte) 0x16, (byte) 0xD6, (byte) 0xD2, (byte) 0x12,
+            (byte) 0x13, (byte) 0xD3, (byte) 0x11, (byte) 0xD1, (byte) 0xD0, (byte) 0x10, (byte) 0xF0, (byte) 0x30, (byte) 0x31, (byte) 0xF1, (byte) 0x33, (byte) 0xF3, (byte) 0xF2, (byte) 0x32, (byte) 0x36, (byte) 0xF6, (byte) 0xF7, (byte) 0x37, (byte) 0xF5, (byte) 0x35, (byte) 0x34, (byte) 0xF4, (byte) 0x3C, (byte) 0xFC, (byte) 0xFD, (byte) 0x3D, (byte) 0xFF, (byte) 0x3F, (byte) 0x3E, (byte) 0xFE, (byte) 0xFA, (byte) 0x3A, (byte) 0x3B, (byte) 0xFB, (byte) 0x39, (byte) 0xF9, (byte) 0xF8, (byte) 0x38, (byte) 0x28, (byte) 0xE8, (byte) 0xE9, (byte) 0x29, (byte) 0xEB, (byte) 0x2B, (byte) 0x2A, (byte) 0xEA, (byte) 0xEE, (byte) 0x2E, (byte) 0x2F, (byte) 0xEF, (byte) 0x2D, (byte) 0xED, (byte) 0xEC, (byte) 0x2C, (byte) 0xE4, (byte) 0x24, (byte) 0x25, (byte) 0xE5, (byte) 0x27, (byte) 0xE7,
+            (byte) 0xE6, (byte) 0x26, (byte) 0x22, (byte) 0xE2, (byte) 0xE3, (byte) 0x23, (byte) 0xE1, (byte) 0x21, (byte) 0x20, (byte) 0xE0, (byte) 0xA0, (byte) 0x60, (byte) 0x61, (byte) 0xA1, (byte) 0x63, (byte) 0xA3, (byte) 0xA2, (byte) 0x62, (byte) 0x66, (byte) 0xA6, (byte) 0xA7, (byte) 0x67, (byte) 0xA5, (byte) 0x65, (byte) 0x64, (byte) 0xA4, (byte) 0x6C, (byte) 0xAC, (byte) 0xAD, (byte) 0x6D, (byte) 0xAF, (byte) 0x6F, (byte) 0x6E, (byte) 0xAE, (byte) 0xAA, (byte) 0x6A, (byte) 0x6B, (byte) 0xAB, (byte) 0x69, (byte) 0xA9, (byte) 0xA8, (byte) 0x68, (byte) 0x78, (byte) 0xB8, (byte) 0xB9, (byte) 0x79, (byte) 0xBB, (byte) 0x7B, (byte) 0x7A, (byte) 0xBA, (byte) 0xBE, (byte) 0x7E, (byte) 0x7F, (byte) 0xBF, (byte) 0x7D, (byte) 0xBD, (byte) 0xBC, (byte) 0x7C, (byte) 0xB4, (byte) 0x74,
+            (byte) 0x75, (byte) 0xB5, (byte) 0x77, (byte) 0xB7, (byte) 0xB6, (byte) 0x76, (byte) 0x72, (byte) 0xB2, (byte) 0xB3, (byte) 0x73, (byte) 0xB1, (byte) 0x71, (byte) 0x70, (byte) 0xB0, (byte) 0x50, (byte) 0x90, (byte) 0x91, (byte) 0x51, (byte) 0x93, (byte) 0x53, (byte) 0x52, (byte) 0x92, (byte) 0x96, (byte) 0x56, (byte) 0x57, (byte) 0x97, (byte) 0x55, (byte) 0x95, (byte) 0x94, (byte) 0x54, (byte) 0x9C, (byte) 0x5C, (byte) 0x5D, (byte) 0x9D, (byte) 0x5F, (byte) 0x9F, (byte) 0x9E, (byte) 0x5E, (byte) 0x5A, (byte) 0x9A, (byte) 0x9B, (byte) 0x5B, (byte) 0x99, (byte) 0x59, (byte) 0x58, (byte) 0x98, (byte) 0x88, (byte) 0x48, (byte) 0x49, (byte) 0x89, (byte) 0x4B, (byte) 0x8B, (byte) 0x8A, (byte) 0x4A, (byte) 0x4E, (byte) 0x8E, (byte) 0x8F, (byte) 0x4F, (byte) 0x8D, (byte) 0x4D,
+            (byte) 0x4C, (byte) 0x8C, (byte) 0x44, (byte) 0x84, (byte) 0x85, (byte) 0x45, (byte) 0x87, (byte) 0x47, (byte) 0x46, (byte) 0x86, (byte) 0x82, (byte) 0x42, (byte) 0x43, (byte) 0x83, (byte) 0x41, (byte) 0x81, (byte) 0x80, (byte) 0x40 };
+
+    /**
+     * 计算CRC16校验
+     *
+     * @param data
+     *            需要计算的数组
+     * @return CRC16校验值
+     */
+    public static int calcCrc16(byte[] data) {
+        return calcCrc16(data, 0, data.length);
+    }
+
+    /**
+     * 计算CRC16校验
+     *
+     * @param data
+     *            需要计算的数组
+     * @param offset
+     *            起始位置
+     * @param len
+     *            长度
+     * @return CRC16校验值
+     */
+    public static int calcCrc16(byte[] data, int offset, int len) {
+        return calcCrc16(data, offset, len, 0xffff);
+    }
+
+    /**
+     * 计算CRC16校验
+     *
+     * @param data
+     *            需要计算的数组
+     * @param offset
+     *            起始位置
+     * @param len
+     *            长度
+     * @param preval
+     *            之前的校验值
+     * @return CRC16校验值
+     */
+    public static int calcCrc16(byte[] data, int offset, int len, int preval) {
+        int ucCRCHi = (preval & 0xff00) >> 8;
+        int ucCRCLo = preval & 0x00ff;
+        int iIndex;
+        for (int i = 0; i < len; ++i) {
+            iIndex = (ucCRCLo ^ data[offset + i]) & 0x00ff;
+            ucCRCLo = ucCRCHi ^ crc16_tab_h[iIndex];
+            ucCRCHi = crc16_tab_l[iIndex];
+        }
+        return ((ucCRCLo & 0x00ff) << 8) | (ucCRCHi & 0x00ff) & 0xffff;
+    }
+}

src/main/java/com/gemho/netty/util/DecodeUtil.java

+package com.gemho.netty.util;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.handler.codec.ByteToMessageDecoder;
+
+import java.util.List;
+
+public class DecodeUtil extends ByteToMessageDecoder {
+    @Override
+    protected void decode(ChannelHandlerContext ctx, ByteBuf buffer, List<Object> out) throws Exception {
+        /*//创建字节数组,buffer.readableBytes可读字节长度
+        byte[] b = new byte[buffer.readableBytes()];
+        //复制内容到字节数组b
+        buffer.readBytes(b);
+        //字节数组转字符串
+        String str = new String(b);
+
+        System.out.println("======decode:" + str);
+
+        out.add(bytesToHexString(b));*/
+        String HEXES = "0123456789ABCDEF";
+        byte[] req = new byte[buffer.readableBytes()];
+        buffer.readBytes(req);
+        final StringBuilder hex = new StringBuilder(2 * req.length);
+
+        for (int i = 0; i < req.length; i++) {
+            byte b = req[i];
+            hex.append(HEXES.charAt((b & 0xF0) >> 4))
+                    .append(HEXES.charAt((b & 0x0F)));
+        }
+        out.add(hex.toString());
+    }
+
+    public String bytesToHexString(byte[] bArray) {
+        StringBuffer sb = new StringBuffer(bArray.length);
+        String sTemp;
+        for (int i = 0; i < bArray.length; i++) {
+            sTemp = Integer.toHexString(0xFF & bArray[i]);
+            if (sTemp.length() < 2)
+                sb.append(0);
+            sb.append(sTemp.toUpperCase());
+        }
+        return sb.toString();
+    }
+
+    public static String toHexString1(byte[] b) {
+        StringBuffer buffer = new StringBuffer();
+        for (int i = 0; i < b.length; ++i) {
+            buffer.append(toHexString1(b[i]));
+        }
+        return buffer.toString();
+    }
+
+    public static String toHexString1(byte b) {
+        String s = Integer.toHexString(b & 0xFF);
+        if (s.length() == 1) {
+            return "0" + s;
+        } else {
+            return s;
+        }
+    }
+}

src/main/java/com/gemho/netty/util/MapUtils.java

+package com.gemho.netty.util;
+
+
+import io.netty.channel.Channel;
+
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.concurrent.locks.ReentrantLock;
+
+public class MapUtils {
+
+    private static ReentrantLock lock = new ReentrantLock();
+
+    private static Map<String, Channel> map = new LinkedHashMap<>();
+
+    public static void addMap(String key, Channel channel) {
+        lock.lock();
+        map.put(key, channel);
+        lock.unlock();
+    }
+
+    public static void removeMap(String key){
+        lock.lock();
+        map.remove(key);
+        lock.unlock();
+    }
+
+    public static Channel getMapChannel(String key) {
+        try{
+            lock.lock();
+            return map.get(key);
+        }finally {
+            lock.unlock();
+        }
+    }
+
+}

src/main/java/com/gemho/netty/util/ParamUtil.java

+package com.gemho.netty.util;
+
+import io.netty.buffer.ByteBuf;
+
+import java.net.SocketAddress;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.concurrent.locks.ReentrantLock;
+
+public class ParamUtil {
+
+    private static ReentrantLock lock = new ReentrantLock();
+
+    private static Map<SocketAddress, Map<Integer, ByteBuf>> PARAM_MAP = new LinkedHashMap<>();
+
+    public static void addMap(SocketAddress key,  Map<Integer, ByteBuf> map) {
+        lock.lock();
+        PARAM_MAP.put(key, map);
+        lock.unlock();
+    }
+
+    public static void updateMap(SocketAddress key, Map<Integer, ByteBuf> map) {
+        lock.lock();
+        PARAM_MAP.replace(key, map);
+        lock.unlock();
+    }
+
+    public static void removeMap(SocketAddress key) {
+        lock.lock();
+        PARAM_MAP.remove(key);
+        lock.unlock();
+    }
+
+    public static Map<Integer, ByteBuf> findMap(SocketAddress key) {
+        lock.lock();
+        try{
+            return PARAM_MAP.get(key);
+        }catch(Exception e) {
+            e.printStackTrace();
+            return null;
+        } finally {
+            lock.unlock();
+        }
+    }
+
+}

src/main/java/com/gemho/netty/util/StringUtil.java

+/*
+ * Copyright Notice:
+ *      Copyright  1998-2008, Huawei Technologies Co., Ltd.  ALL Rights Reserved.
+ *
+ *      Warning: This computer software sourcecode is protected by copyright law
+ *      and international treaties. Unauthorized reproduction or distribution
+ *      of this sourcecode, or any portion of it, may result in severe civil and
+ *      criminal penalties, and will be prosecuted to the maximum extent
+ *      possible under the law.
+ */
+package com.gemho.netty.util;
+
+import java.math.BigInteger;
+
+public class StringUtil {
+
+    public static boolean strIsNullOrEmpty(String s) {
+        return (null == s || s.trim().length() < 1);
+    }
+
+    public static byte[] stringToAscii(String value)
+    {
+        char[] chars = value.toCharArray();
+        byte[] b = new byte[chars.length];
+        for (int i = 0; i < chars.length; i++) {
+            b[i] = (byte) chars[i];
+        }
+        return b;
+    }
+
+    public static String bytesToHexString(byte[] bArray){
+        StringBuffer sb = new StringBuffer(bArray.length);
+        String sTemp;
+        for (int i = 0; i < bArray.length; i++) {
+            sTemp = Integer.toHexString(0xFF & bArray[i]);
+            if (sTemp.length() < 2)
+                sb.append(0);
+            sb.append(sTemp.toUpperCase());
+        }
+        return sb.toString();
+    }
+    
+    /**
+     * @Title:hexString2Bytes
+     * @Description:16进制字符串转字节数组
+     * @param src  16进制字符串
+     * @return 字节数组
+     */
+    public static byte[] hexString2Bytes(String src) {
+        int l = src.length() / 2;
+        byte[] ret = new byte[l];
+        for (int i = 0; i < l; i++) {
+            ret[i] = (byte) Integer
+                    .valueOf(src.substring(i * 2, i * 2 + 2), 16).byteValue();
+        }
+        return ret;
+    }
+
+
+
+    public static String encodeHEX(Integer numb){
+        String hex= Integer.toHexString(numb);
+        return hex;
+    }
+
+    public static int decodeHEX(String hexs) {
+        BigInteger bigint = new BigInteger(hexs, 16);
+        int numb = bigint.intValue();
+        return numb;
+    }
+
+    /**
+     * 高位补零
+     */
+    public static String splitString(String hexcode) {
+        StringBuffer sb = new StringBuffer();
+        int len = 24 - hexcode.length();
+        for (int i = 0; i < len; i++) {
+            sb.append(0);
+        }
+        return sb.toString() + hexcode;
+    }
+
+    /**
+     * 十六进制字符串转十进制
+     *
+     * @param hex
+     *            十六进制字符串
+     * @return 十进制数值
+     */
+    public static int hexStringToAlgorism(String hex) {
+        hex = hex.toUpperCase();
+        int max = hex.length();
+        int result = 0;
+        for (int i = max; i > 0; i--) {
+            char c = hex.charAt(i - 1);
+            int algorism = 0;
+            if (c >= '0' && c <= '9') {
+                algorism = c - '0';
+            } else {
+                algorism = c - 55;
+            }
+            result += Math.pow(16, max - i) * algorism;
+        }
+        return result;
+    }
+
+
+    /**
+     * 将汉字转换车16进制字符串
+     * @param str
+     * @return st
+     */
+    public static String enUnicode(String str) {// 将汉字转换为16进制数
+       String st = "";
+       try {
+          //这里要非常的注意,在将字符串转换成字节数组的时候一定要明确是什么格式的,这里使用的是gb2312格式的,还有utf-8,ISO-8859-1等格式
+          byte[] by = str.getBytes("gb2312");
+          for (int i = 0; i < by.length; i++) {
+              String strs = Integer.toHexString(by[i]);
+              if (strs.length() > 2){
+                 strs = strs.substring(strs.length() - 2);
+              }
+              st += strs;
+          }
+       } catch (Exception e) {
+          e.printStackTrace();
+       }
+       return st;
+    }
+
+    /**
+     * 数据补零
+     * @param str
+     * @return
+     */
+    public static String hightAddZero(String str) {
+        if (str.length() == 1) {
+            return "000" +str;
+        }else if(str.length() == 2) {
+            return "00" +str;
+        }else if(str.length() == 3) {
+            return "0" +str;
+        }else {
+            return str;
+        }
+    }
+
+    /**
+     * Ascii转换为字符串
+     * @param value
+     * @return
+     */
+    public static String asciiToString(String value)
+    {
+        StringBuffer sbu = new StringBuffer();
+        String[] chars = value.split(",");
+        for (int i = 0; i < chars.length; i++) {
+            sbu.append((char) Integer.parseInt(chars[i]));
+        }
+        return sbu.toString();
+    }
+
+}

src/main/resources/application.yml

+server:
+  port: 9998
+
+spring:
+  datasource:
+    driver-class-name: org.postgresql.Driver
+    url: jdbc:postgresql://localhost:5432/postgres
+    username: postgres
+    password: red___

src/test/java/com/gemho/netty/NettyApplicationTests.java

+package com.gemho.netty;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class NettyApplicationTests {
+
+    @Test
+    void contextLoads() {
+    }
+
+}

target/classes/application.yml

+server:
+  port: 9998
+
+spring:
+  datasource:
+    driver-class-name: org.postgresql.Driver
+    url: jdbc:postgresql://localhost:5432/postgres
+    username: postgres
+    password: red___