Question

我想在maven构建之后运行我的Izpack安装程序，但是在执行“mvn test”后我得到了以下输出：

[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] Building RS IzPack installer
[INFO]    task-segment: [test]
[INFO] ------------------------------------------------------------------------
[debug] execute contextualize
[INFO] [resources:copy-resources {execution: copy-resources}]
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 109 resources
[INFO] Copying 4 resources
[INFO] Preparing exec:java
[WARNING] Removing: java from forked lifecycle, to prevent recursive invocation.
[debug] execute contextualize
[INFO] [resources:copy-resources {execution: copy-resources}]
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 109 resources
[INFO] Copying 4 resources
[INFO] [exec:java {execution: default}]
[WARNING]
java.lang.ClassNotFoundException: com.izforge.izpack.installer.Installer
        at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
        at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:285)
        at java.lang.Thread.run(Thread.java:595)
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO] ------------------------------------------------------------------------
[INFO] An exception occured while executing the Java class. com.izforge.izpack.installer.Installer

看起来我必须以某种方式将生成的jar文件放入classpath，任何想法？

摘自我的pom.xml：

  <plugin>
    <groupId>org.codehaus.mojo</groupId>
    <artifactId>exec-maven-plugin</artifactId>
    <version>1.2.1</version>
    <executions>
      <execution>
        <phase>test</phase>
        <goals>
          <goal>java</goal> <!-- "exec" also possible -->
        </goals>
        <configuration>
          <mainClass>com.izforge.izpack.installer.Installer</mainClass>
          <arguments>
            <argument>-console</argument>
            <!-- <argument>arg1</argument> -->
          </arguments>
        </configuration>
      </execution>
    </executions>
  </plugin>

Apache Maven 2.2.1（r801777; 2009-08-06 21：16：01 + 0200） Java版本：1.6.0_20 Java home：C：\ Java \ jdk16 \ jre 默认语言环境：en_GB，平台编码：Cp1252 操作系统名称：“windows xp”版本：“5.1”arch：“x86”系列：“windows”

马丁

Answer 1

你看到罐子里面了吗？可能是maven没有将所需的类包含在jar中。

Answer 2

我认为您应该使用java为-classpath命令定义类路径。您需要构造一个包含您的主类com.izforge.izpack.installer.Installer及其所有依赖项的类路径。它可以在jar，或类文件夹或多个jar中。有关如何为java调用定义类路径，请参阅Wikipedia。

Answer 3

您可以使用类似的东西来定义执行的依赖项：

<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<version>1.2.1</version>
<executions>
  <execution>
    <phase>test</phase>
    <goals>
      <goal>java</goal> <!-- "exec" also possible -->
    </goals>
    <configuration>
      <mainClass>com.izforge.izpack.installer.Installer</mainClass>
      <arguments>
        <argument>-console</argument>
        <!-- <argument>arg1</argument> -->
      </arguments>
    </configuration>
  </execution>
</executions>
<dependencies>
  <dependency>
    <groupId>org.codehaus.izpack</groupId>
    <artifactId>izpack-standalone-compiler</artifactId>
    <version>4.3.4</version>
    <scope>compile</scope>
  </dependency>
</dependencies>

但也有Maven plugin for izpack。

如何在maven目标目录中的JAR文件中运行java类？

3 个答案: