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使用 Eclipse IDE 在 Raspberry Pi 上远程调试 java maven 项目：握手错误

tag-icon • tag-icon java raspberrypi eclipse remote remote-access
使用 Eclipse IDE 在 Raspberry Pi 上远程调试 java maven 项目：握手错误

我正在尝试在 Ubuntu 20.04 上配置 Eclipse IDE (2021-09 (4.21.0)) 以在 RaspberryPi 上远程调试 Java 应用程序。我遵循了多个“教程”(链接1，链接2)。通过两者的结合以及在网上对错误消息的深入搜索，我能够重新创建 pom.xml 和 build.xml

pom.xml

<project xmlns="https://maven.apache.org/POM/4.0.0" xmlns:xsi="https://www.w3.org

/2001/XMLSchema-instance"
  xsi:schemaLocation="https://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>pi</groupId>
  <artifactId>hello</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>jar</packaging>

  <name>hello</name>
  <url>http://maven.apache.org</url>

<build>
      <plugins>
         <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-jar-plugin</artifactId>
            <configuration>
               <archive>
                  <manifest>
                     <mainClass>pi.hello.App</mainClass>
                  </manifest>
               </archive>
            </configuration>
         </plugin>
      </plugins>
   </build>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>6</maven.compiler.source>
    <maven.compiler.target>1.6</maven.compiler.target>
  </properties>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
  </dependencies>
</project>

构建文件

<?xml version="1.0" encoding="UTF-8"?>
<project name="hello" default="remote-run" basedir="."
    xmlns:artifact="antlib:org.apache.maven.artifact.ant">

    <!-- Setup RASPBERRY PI properties -->
    <property name="raspberrypi" value="192.168.4.2" />
    <property name="raspberryfolder" value="~" />
    <property name="username" value="pi" />
    <property name="password" value="raspberry" />

    <!--
    <path id="maven-ant-tasks.classpath" path="${ant.libs.dir}/maven-ant-tasks-2.1.3.jar" />
    <typedef 
        resource="org/apache/maven/artifact/ant/antlib.xml"
        uri="antlib:org.apache.maven.artifact.ant"
        classpathref="maven-ant-tasks.classpath" />

        
    <path id="maven-ant-tasks.classpath" path="lib/maven-ant-tasks-2.1.3.jar" />
    <typedef 
        resource="org/apache/maven/artifact/ant/antlib.xml" 
        uri="antlib:org.apache.maven.artifact.ant" 
        classpathref="maven-ant-tasks.classpath" />
    -->

    <!-- Add maven install target to be run before deploy -->
        
    <target name="maven-install"> 
        <artifact:mvn pom="pom.xml"> 
            <arg value="install"/> 
        </artifact:mvn> 
    </target> 

    <!-- Locate the prokect jar and transfer via scp to RASPBERRY PI -->
    <target name="transfer" depends="maven-install">
        <first id="jars">
            <!--
            <fileset dir="target" includes="**/*-SNAPSHOT-jar-with-dependencies.jar" />
            -->
            <fileset dir="target" includes="**/*.jar" />
        </first>
        <pathconvert pathsep="," property="jar.path" refid="jars" />
        <basename file="${jar.path}" property="jar.filename" />
        <echo>">>> Found application ${jar.path}"</echo>

        <echo>">>> Copying application to ${raspberrypi}:${raspberryfolder}/${jar.filename}"</echo>
        <scp 
            localfile="${jar.path}" 
            todir="${username}:${password}@${raspberrypi}:${raspberryfolder}" 
            trust="true" />

    </target>
        
    <!-- Run java -->
    <target name="remote-run" depends="transfer">   
        <echo>">>> Starting ${raspberrypi}:${raspberryfolder}/${jar.filename}"</echo>

        <sshexec 
            host="${raspberrypi}" 
            username="${username}" 
            password="${password}" 
            trust="true" 
            failonerror="true" 
            usepty="true" 
            command="java -jar ${jar.filename}" />
    </target>
    
    <!-- Run java in debug mode and keep waiting for execution -->
    <target name="remote-debug" depends="transfer"> 
        <echo>">>> Starting ${raspberrypi}:${raspberryfolder}/${jar.filename} in debug mode"</echo>
        <sshexec 
            host="${raspberrypi}" 
            username="${username}" 
            password="${password}" 
            trust="true" 
            failonerror="true" 
            usepty="true" 
            command="java -Xdebug -Xrunjdwp:server=y,transport=dt_socket,address=8000,suspend=y -jar ${jar.filename}" />
    </target>
</project>

使用以下方式编译 build.xml 时的输出

运行方式 -> Ant 构建

结果是

maven-install:
[artifact:mvn] [INFO] Scanning for projects...
[artifact:mvn] [INFO] ------------------------------------------------------------------------
[artifact:mvn] [INFO] Building hello
[artifact:mvn] [INFO]    task-segment: [install]
[artifact:mvn] [INFO] ------------------------------------------------------------------------
[artifact:mvn] [INFO] [resources:resources]
[artifact:mvn] [INFO] Using 'UTF-8' encoding to copy filtered resources.
[artifact:mvn] [INFO] skip non existing resourceDirectory /media/stefan/DATA/Electronics/java/hello/src/main/resources
[artifact:mvn] [INFO] [compiler:compile]
[artifact:mvn] [INFO] Nothing to compile - all classes are up to date
[artifact:mvn] [INFO] [resources:testResources]
[artifact:mvn] [INFO] Using 'UTF-8' encoding to copy filtered resources.
[artifact:mvn] [INFO] skip non existing resourceDirectory /media/stefan/DATA/Electronics/java/hello/src/test/resources
[artifact:mvn] [INFO] [compiler:testCompile]
[artifact:mvn] [INFO] Nothing to compile - all classes are up to date
[artifact:mvn] [INFO] [surefire:test]
[artifact:mvn] [INFO] Surefire report directory: /media/stefan/DATA/Electronics/java/hello/target/surefire-reports
[artifact:mvn] -------------------------------------------------------
[artifact:mvn]  T E S T S
[artifact:mvn] -------------------------------------------------------
[artifact:mvn] Running pi.hello.AppTest
[artifact:mvn] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.021 sec
[artifact:mvn] Results :
[artifact:mvn] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0
[artifact:mvn] [INFO] [jar:jar]
[artifact:mvn] [INFO] [install:install]
[artifact:mvn] [INFO] Installing /media/stefan/DATA/Electronics/java/hello/target/hello-0.0.1-SNAPSHOT.jar to /home/stefan/.m2/repository/pi/hello/0.0.1-SNAPSHOT/hello-0.0.1-SNAPSHOT.jar
[artifact:mvn] [INFO] ------------------------------------------------------------------------
[artifact:mvn] [INFO] BUILD SUCCESSFUL
[artifact:mvn] [INFO] ------------------------------------------------------------------------
[artifact:mvn] [INFO] Total time: 1 second
[artifact:mvn] [INFO] Finished at: Tue Nov 30 17:12:36 CET 2021
[artifact:mvn] [INFO] Final Memory: 18M/70M
[artifact:mvn] [INFO] ------------------------------------------------------------------------
transfer:
     [echo] ">>> Found application /media/stefan/DATA/Electronics/java/hello/target/hello-0.0.1-SNAPSHOT.jar"
     [echo] ">>> Copying application to 192.168.4.2:~/hello-0.0.1-SNAPSHOT.jar"
      [scp] Connecting to 192.168.4.2:22
      [scp] done.
remote-run:
     [echo] ">>> Starting 192.168.4.2:~/hello-0.0.1-SNAPSHOT.jar"
  [sshexec] Connecting to 192.168.4.2:22
  [sshexec] cmd : java -jar hello-0.0.1-SNAPSHOT.jar
  [sshexec] Hello World!
  [sshexec] 
BUILD SUCCESSFUL
Total time: 6 seconds

maven 项目（通过向导创建）的默认 build.xml 的所有其他插件或工件组合都会产生错误，因为某些插件的版本错误（即使安装了正确的版本

解析“org.apache.maven.plugins:maven-resources-plugin”版本时出错：插件需要 Maven 版本 3.0

当前版本

mvn -version
Apache Maven 3.6.3
Maven home: /usr/share/maven
Java version: 11.0.11, vendor: Ubuntu, runtime: /usr/lib/jvm/java-11-openjdk-amd64
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "5.11.0-40-generic", arch: "amd64", family: "unix"

为了开始工作，我宁愿不改变我当前的build.xml。

配置的最后一步是让远程启动器工作。按照教程，配置窗口如下所示 调试配置

测试连接结果

错误虚拟机

由于构建过程能够通过 ssh 连接，放置并运行 jar，但我不知道为什么无法建立连接。连接的参数存储在 pom.xml 中，我不确定调试配置中的条目有什么作用。可以使用 ssh 连接的命令行命令（ssh pi@）在 RPi 上建立终端。不应该存在安全访问问题。

  1. 为什么当连接已经在pom.xml中定义时，远程配置需要地址和端口？
  2. 是否甚至使用“Debug_As->RPi_Remote”（创建的调试配置）调用build.xml？
  3. 我如何调用 build.xml 并启用断点的使用？

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