java Pi4J类路径错误Intellij在Pi Zero W上远程运行
问题摘要
当我试图在桌面上编写代码并将其远程部署到我的PiZero W时，我遇到了一个类路径错误
背景
{a1}v2。0enter link description here库提供了一个Maven原型来帮助开发，以及在远程PC上开发的说明
环境
IDE: Intellij Ultimate
Development PC is Windows 10
Java 11.0.2
Maven 3.8.3
Rasp Pi Zero W
Open jdk java 11.0.8
Maven 3.8.3
迄今为止采取的步骤
在开发PC上，我已根据安装了原型：
INSTALL ARCHETYPE
cd pi4j-maven-archetype-master
mvn install
...
BUILD SUCCESS
CREATE PROJECT
mkdir pitest2
mvn archetype:generate -DarchetypeCatalog=local
....
answer questions per instructions
BUILD SUCCESS
然后我在Intellij中打开项目，用maven刷新它并编辑树莓。属性设置为我的pi IP地址和登录名
在构建和部署原型中包含的示例代码时，说明会说明：
The project declares in the pom.xml the following maven/ant goals that you can execute with the command shown :
mvn clean : delete all compiled files from local and remote project
mvn install : builds the project, uploads the required jars to the remote target RPI board
mvn antrun:run@exec : runs the program on the remote target
mvn antrun:run@debug : runs a remote debugging session on the target RPI.
命令mvn install起作用，文件被复制到Pi
当我尝试使用mvn antrun:run@exec命令时，结果是：
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 16.818 s
[INFO] Finished at: 2021-11-16T20:15:56+13:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-antrun-plugin:3.0.0:run (exec) on project pitest2: An Ant BuildException has occured: The following error occurred while executing this line:
[ERROR] C:\Users\RM\IdeaProjects\pitest2\antrun\build.xml:166: The following error occurred while executing this line:
[ERROR] C:\Users\RM\IdeaProjects\pitest2\antrun\build.xml:123: Remote command failed with exit status 1
[ERROR] around Ant part ...<ant antfile="antrun/build.xml" target="run-remote" />... @ 9:59 in C:\Users\RM\IdeaProjects\pitest2\target\antrun\build-main.xml
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
采取的其他步骤
deploy的输出显示最简单的。jar被复制到Pi及其依赖项
pi@raspberrypi: ls
pi4j-core.jar
pi4j-library-pigpio.jar
pi4j-plugin-pigpio.jar
pi4j-plugin-raspberrypi.jar
pitest2.jar
pitest2-jar-with-dependencies.jar
slf4j-api.jar
slf4j-simple.jar
直接在pi上执行的其他尝试：
pi@raspberrypi:~/IdeaProjects/pitest2/dist/lib $ java -cp . pitest2.jar
Error: Could not find or load main class pitest2.jar
Caused by: java.lang.ClassNotFoundException: pitest2.jar
pi@raspberrypi:~/IdeaProjects/pitest2/dist/lib $ java -cp . pitest2.jar com.geekhelp.Main
Error: Could not find or load main class pitest2.jar
Caused by: java.lang.ClassNotFoundException: pitest2.jar
pi@raspberrypi:~/IdeaProjects/pitest2/dist/lib $ java -cp ./ pitest2.jar com.geekhelp.Main
Error: Could not find or load main class pitest2.jar
Caused by: java.lang.ClassNotFoundException: pitest2.jar
pi@raspberrypi:~/IdeaProjects/pitest2/dist/lib $ java -cp pitest2.jar com.geekhelp.Main
Exception in thread "main" java.lang.NoClassDefFoundError: com/pi4j/util/Console
at com.geekhelp.Main.<clinit>(Main.java:24)
Caused by: java.lang.ClassNotFoundException: com.pi4j.util.Console
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
... 1 more
pi@raspberrypi:~/IdeaProjects/pitest2/dist/lib $
在/dist下，什么看起来像一个胖罐子
pi@raspberrypi:~/IdeaProjects/pitest2/dist $ java -cp pitest2.jar com.geekhelp.Main
21:01:58 [main] INFO com.pi4j.util.Console - ---------------------------
21:01:58 [main] INFO com.pi4j.util.Console - | Hello Rasbian world ! |
21:01:58 [main] INFO com.pi4j.util.Console - ---------------------------
21:01:58 [main] INFO com.pi4j.Pi4J - New auto context
21:01:58 [main] INFO com.pi4j.Pi4J - New context builder
...
...
21:02:02 [main] DEBUG com.pi4j.platform.impl.DefaultRuntimePlatforms - platforms loaded [1]
21:02:02 [main] DEBUG com.pi4j.runtime.impl.DefaultRuntime - Pi4J context/runtime successfully initialized.'
21:02:02 [main] DEBUG com.pi4j.context.impl.DefaultContext - Pi4J runtime context successfully created & initialized.'
21:02:02 [main] DEBUG com.pi4j.context.impl.DefaultContextBuilder - Pi4J successfully created and initialized a new runtime 'Context'.'
21:02:02 [main] INFO com.pi4j.util.Console - --------------------
21:02:02 [main] INFO com.pi4j.util.Console - | Pi4J PLATFORMS |
21:02:02 [main] INFO com.pi4j.util.Console - --------------------
21:02:02 [main] INFO com.pi4j.util.Console -
PLATFORMS: [1] "Pi4J Runtime Platforms" <com.pi4j.platform.impl.DefaultPlatforms>
└─PLATFORM: "RaspberryPi Platform" {raspberrypi} <com.pi4j.plugin.raspberrypi.platform.RaspberryPiPlatform> {Pi4J Platform for the RaspberryPi series of products.}
21:02:03 [main] INFO com.pi4j.util.Console -
com.pi4j.provider.exception.ProviderNotFoundException: Pi4J provider [pigpio-digital-output] could not be found. Please include this 'provider' JAR in the classpath.
at com.pi4j.provider.impl.DefaultRuntimeProviders.get(DefaultRuntimeProviders.java:238)
at com.pi4j.provider.impl.DefaultProviders.get(DefaultProviders.java:147)
at com.pi4j.provider.Providers.get(Providers.java:253)
at com.pi4j.context.Context.create(Context.java:316)
at com.pi4j.internal.IOCreator.create(IOCreator.java:58)
at com.pi4j.internal.IOCreator.create(IOCreator.java:96)
at com.pi4j.internal.IOCreator.create(IOCreator.java:176)
at com.geekhelp.Main.run(Main.java:63)
at com.geekhelp.Main.main(Main.java:34)
21:02:03 [main] DEBUG com.pi4j.platform.impl.DefaultRuntimePlatforms - removed platform from managed platform map [id=raspberrypi; name=RaspberryPi Platform; class=com.pi4j.plugin.raspberrypi.platform.RaspberryPiPlatform]
一位同事从GitHub下载了我的项目（与原型相同），并在Rasp Pi 4（不是零W）上成功运行了它
问：为什么代码没有看到依赖项？什么时候跑
# 1 楼答案
我设法把它修好了
PiZero W的问题在于，常用的Java JDK的默认版本给出了一个不受支持的ARM错误。因此，我按照此处的说明安装了Zulu版本：
https://webtechie.be/post/2020-08-27-azul-zulu-java-11-and-gluon-javafx-11-on-armv6-raspberry-pi/
从我的桌面IDE执行远程执行时，请使用rasperberry。属性文件的值指向/usr/lib/jvm/default java下的默认java文件夹，但我安装的javajdk的zulu版本没有创建此文件夹
我的解决办法是更改
rasperberry.properties中的以下行：