Question

我使用nar-maven-plugin测试，然后在下一个项目中我需要JNI :(。我从git repo中选择了it0003示例。没有本机库加载器，手动放置库和设置库路径运行。然后我会使用native-library-loader。为此，我为单个JAR文件添加了依赖项和assembly-plugin。我当前的pom：

<?xml version="1.0" encoding="UTF-8"?>
<!--
  #%L
  Native ARchive plugin for Maven
  %%
  Copyright (C) 2002 - 2014 NAR Maven Plugin developers.
  %%
  Licensed 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

       http://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.
  #L%
  -->

<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>

  <parent>
    <groupId>com.github.maven-nar.its.nar</groupId>
    <artifactId>it-parent</artifactId>
    <version>1.0-SNAPSHOT</version>
    <relativePath>../it-parent/pom.xml</relativePath>
  </parent>

  <artifactId>it0003-jni</artifactId>
  <packaging>nar</packaging>

  <name>NAR JNI Test</name>
  <version>1.0-SNAPSHOT</version>
  <description>
    Simple JNI Library
  </description>
  <url>http://maven.apache.org/</url>

  <properties>
    <skipTests>true</skipTests>
  </properties>  

  <build>
    <defaultGoal>install</defaultGoal>
    <plugins>
      <plugin>
        <groupId>com.github.maven-nar</groupId>
        <artifactId>nar-maven-plugin</artifactId>
        <extensions>true</extensions>
        <configuration>
          <cpp>
            <debug>true</debug>
          </cpp>
          <c>
            <testOptions>
              <testOption>-DTESTOPT="this is a nar-testCompile flag"</testOption>
            </testOptions>
          </c>
          <libraries>
            <library>
              <type>jni</type>
              <narSystemPackage>it0003</narSystemPackage>
              <linkCPP>false</linkCPP>
            </library>
          </libraries>
          <javah>
            <includes>
              <include></include>
            </includes>
          </javah>
          <tests>
            <test>
              <name>HelloWorld</name>
            </test>
          </tests>
        </configuration>
      </plugin>
      <plugin>
        <artifactId>maven-assembly-plugin</artifactId>
        <version>2.4.1</version>
        <configuration>
          <descriptorRefs>
            <descriptorRef>jar-with-dependencies</descriptorRef>
          </descriptorRefs>
          <archive>
            <manifest>
              <mainClass>it0003.HelloWorldJNI</mainClass>
            </manifest>
          </archive>
        </configuration>
        <executions>
          <execution>
            <id>make-assembly</id>
            <phase>package</phase>
            <goals>
              <goal>single</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
    </plugins>
  </build>

  <dependencies>
      <dependency>
          <groupId>org.scijava</groupId>
          <artifactId>native-lib-loader</artifactId>
          <version>2.0.2</version>
      </dependency>
  </dependencies>
</project>

然后我将生成的JAR和NAR放在同一目录中，并以：

开头

    rd4@PC222-VirtualBox ~/Schreibtisch/nartest $ java -Djava.library.path=/home/rd4/Schreibtisch/nartest/ -jar it0003-jni-1.0-SNAPSHOT-jar-with-dependencies.jar

然后我得到以下错误：

java.lang.RuntimeException: Library 'libit0003-jni-1.0-SNAPSHOT.so' not found!
    at it0003.NarSystem.getLibPath(NarSystem.java:141)
    at it0003.NarSystem.loadLibrary(NarSystem.java:45)
    at it0003.HelloWorldJNI.<clinit>(HelloWorldJNI.java:27)
Exception in thread "main" java.lang.ExceptionInInitializerError
Caused by: java.lang.RuntimeException: Library 'libit0003-jni-1.0-SNAPSHOT.so' not found!
    at it0003.NarSystem.getLibPath(NarSystem.java:141)
    at it0003.NarSystem.loadLibrary(NarSystem.java:45)
    at it0003.HelloWorldJNI.<clinit>(HelloWorldJNI.java:27)

有谁知道我的错误是什么？

Answer 1

进入同样的问题。

确保设置了$ JAVA_HOME环境变量。在Linux上，您可以使用which java找到此内容，然后使用export <path>导出路径。此外，您应该链接到pom.xml文件中编译器选项中的包含路径：

<c>
  <name>gcc</name>
  <exceptions>false</exceptions>
  <debug>false</debug>
  <includes>
    <include>**/*.c</include>
  </includes>
  <options>
    <option>-I${java.home}/include</option>
    <option>-I${java.home}/include/linux</option>
  </options>
</c>

<linker>
  <name>gcc</name>
  <options>
    <option>-I${java.home}/include</option>
    <option>-I${java.home}/include/linux</option>
  </options>
</linker>

希望这有帮助，非常确定这是修复它的原因。如果我弄清楚实际修复了什么，我会更新这个答案。

nar-maven-plugin和native-library-loader不加载native lib

1 个答案: