我有一个使用Pi4J的简单Java类,其中包含一个main方法。我想构建它并将其部署到树莓派。我在 Windows 10 上使用 java 8,我的 IDE 是 NetBeans 8.1。如果项目设置为普通(非 Maven(Java 应用程序,并设置为通过 NetBeans 构建配置部署到 Raspberry Pi,如下所示,则项目将通过 jar 生成正常和 FTP,然后毫无问题地运行它。我想做同样的事情,但使用 Maven。问题是正在运行的代码具有 ARM 的 Pi 架构原生的 C 代码,我正在使用的 Maven 插件似乎首先在我的本地盒子上运行 jar,其中 C 代码将崩溃抛出异常
SEVERE:无法使用路径加载 [libpi4j.so]:[/lib/libpi4j.so] java.lang.IllegalArgumentException:路径必须是绝对的,但找到:\lib\libpi4j.so at com.pi4j.util.NativeLibraryLoader.loadLibraryFromClasspath(NativeLibraryLoader.java:120( at com.pi4j.util.NativeLibraryLoader.load(NativeLibraryLoader.java:92( at com.pi4j.wiringpi.Gpio.(GPIO.java:174( at com.pi4j.io.gpio.RaspiGpioProvider.(RaspiGpioProvider.java:51( at com.pi4j.io.gpio.GpioFactory.getDefaultProvider(GpioFactory.java:106( at com.pi4j.io.gpio.impl.GpioControllerImpl.(GpioControllerImpl.java:54( at com.pi4j.io.gpio.GpioFactory.getInstance(GpioFactory.java:89( at com.hadronix.pi4jsample2.ControlGpioExample.main(ControlGpioExample.java:24(
线程"main"中的异常 java.lang.UnsatisfiedLinkError: com.pi4j.wiringpi.Gpio.wiringPiSetup((I at com.pi4j.wiringpi.Gpio.wiringPiSetup(Native Method( at com.pi4j.io.gpio.RaspiGpioProvider.(RaspiGpioProvider.java:51( 在 com.pi4j.io.gpio.GpioFactory.getDefaultProvider(GpioFactory.java:106( 在 com.pi4j.io.gpio.impl.GpioControllerImpl.(GpioControllerImpl.java:54( at com.pi4j.io.gpio.GpioFactory.getInstance(GpioFactory.java:89( at com.hadronix.pi4jsample2.ControlGpioExample.main(ControlGpioExample.java:24(
如果我只是做一个干净的构建,它会构建得很好并创建 jar。但是,如果我选择运行构建,那么这就是崩溃发生的地方。这是我用来将jar部署到Pi的Maven插件。
<!-- OPTIONALLY DEPLOY THE FINAL JAR TO THE RASPBERRY PI -->
<plugin>
<artifactId>maven-antrun-plugin</artifactId>
<executions>
<!-- copy the compiled JAR file to the Raspberry Pi platform platform -->
<execution>
<id>ControlGpioExample.jar</id>
<phase>install</phase>
<goals>
<goal>run</goal>
</goals>
<configuration>
<tasks>
<taskdef resource="net/sf/antcontrib/antcontrib.properties"
classpathref="maven.plugin.classpath" />
<if>
<equals arg1="${pi.transfer.dev}" arg2="true" />
<then>
<!-- ensure the target directory exists on the Raspberry Pi -->
<sshexec host="${pi.host.dev}" port="${pi.port.dev}" username="${pi.user.dev}"
password="${pi.password.dev}" trust="true" failonerror="false"
verbose="true" command="mkdir --parents ${pi.dirCopyTo.dev}" />
<!-- copy the JAR file to the Raspberry Pi -->
<scp
file="${project.build.directory}/${project.build.finalName}.jar"
todir="${pi.user.dev}:${pi.password.dev}@${pi.host.dev}:${pi.dirCopyTo.dev}"
port="${pi.port.dev}" trust="true" verbose="true" failonerror="true">
</scp>
</then>
</if>
</tasks>
</configuration>
</execution>
</executions>
<dependencies>
<dependency>
<groupId>org.apache.ant</groupId>
<artifactId>ant-jsch</artifactId>
<version>${ant-jsch.version}</version>
</dependency>
<dependency>
<groupId>com.jcraft</groupId>
<artifactId>jsch</artifactId>
<version>${jsch.version}</version>
</dependency>
<dependency>
<groupId>ant-contrib</groupId>
<artifactId>ant-contrib</artifactId>
<version>${ant-contrib.version}</version>
</dependency>
</dependencies>
</plugin>
我正在尝试弄清楚如何更改此插件以不首先在本地计算机上执行代码。我只是希望它假设 jar 已经构建,ssh 到远程 Pi 中并将 jar 复制到上面,然后在那里运行它。另外,如果有人在使用 Maven 时有更好的方法,那么我愿意接受建议。任何帮助都会很棒!
以下是我用作参考的链接链接 1
提前谢谢。
已解决:此pom文件将构建Pi4J示例用例的可执行JAR。然后它会将JAR传输到Raspberry Pi,然后执行它。在 netbeans 中,这是通过构建命令完成的。因此,只需一个按钮即可构建、部署和运行!
我不喜欢的一件事是它将依赖项作为包而不是原始 JAR 带来。它还在构建时创建 2 个 JAR;一个有依赖关系,一个没有依赖关系。打开罐子,看看可以做些什么来改善结构。随时优化并提供反馈。
另外,为了简单起见,我把我的树莓派属性放在这个pom文件中。但是,这些应该位于设置.xml文件或其他东西中的受控用户主位置。
注意:Pi4J具有C代码本机ARM依赖项,这会阻止其在非ARM架构上运行,必须发送到Pi。
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.company</groupId>
<artifactId>Swarm</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<!-- DEFAULT RASPBERRY PI PROPERTIES -->
<pi.host>192.168.1.20</pi.host>
<pi.port>22</pi.port>
<pi.user>root</pi.user>
<pi.password>root</pi.password>
<pi.deployDirectory>/home/pi/artifacts</pi.deployDirectory>
<pi.main.class>com.company.test.ControlGpioExample</pi.main.class>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.pi4j</groupId>
<artifactId>pi4j-core</artifactId>
<version>1.0</version>
</dependency>
</dependencies>
<build>
<plugins>
<!-- This plugin will generate JAR MANIFEST file inside the JAR in order to make our applicationeasily runnable -->
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<configuration>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<mainClass>${pi.main.class}</mainClass>
</manifest>
</archive>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
<executions>
<execution>
<id>make-my-jar-with-dependencies</id>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
<!--This plugin will Transfer the executable JAR file to the Pi and runs it -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-antrun-plugin</artifactId>
<version>1.8</version>
<executions>
<execution>
<phase>install</phase>
<goals>
<goal>run</goal>
</goals>
<configuration>
<tasks>
<!-- ensure the target directory exists on the Raspberry Pi -->
<sshexec host="${pi.host}" port="${pi.port}" username="${pi.user}" password="${pi.password}"
trust="true" failonerror="false" verbose="true"
command="mkdir --parents ${pi.deployDirectory}"/>
<!-- copy the JAR file to the Raspberry Pi -->
<scp
file="${project.build.directory}/${project.build.finalName}-jar-with-dependencies.jar"
todir="${pi.user}:${pi.password}@${pi.host}:${pi.deployDirectory}"
port="${pi.port}" trust="true" verbose="true" failonerror="true">
</scp>
<!-- run the JAR file on the Raspberry Pi -->
<sshexec host="${pi.host}" port="${pi.port}" username="${pi.user}"
password="${pi.password}" trust="true" failonerror="false"
verbose="true"
command="java -jar ${pi.deployDirectory}/${project.build.finalName}-jar-with-dependencies.jar"/>
</tasks>
</configuration>
</execution>
</executions>
<dependencies>
<dependency>
<groupId>org.apache.ant</groupId>
<artifactId>ant-jsch</artifactId>
<version>1.9.6</version>
</dependency>
</dependencies>
</plugin>
</plugins>
</build>