exec-maven-plugin 错误，即使在工作示例中也是如此

EDIT5 更新/

我正在使用 Maven 3.3.3。
我只是创建新项目并添加编译和执行插件，作为网络上的示例。
我尝试执行，但出现错误

[ERROR] Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.2.1:java (default-cli) on project QNAProject: An exception occured while executing the Java class. com.jadex.qna.QNAProject.App -> [Help 1]<br>
[ERROR] <br>
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.<br>
[ERROR] Re-run Maven using the -X switch to enable full debug logging.<br>
[ERROR] <br>
[ERROR] For more information about the errors and possible solutions, please read the following articles:<br>
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException<br>

我尝试了 exec-maven-plugin 版本 1.2.1 和 1.4.0，但遇到了同样的错误。这是我的 pom.xml

<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.jadex.qna</groupId>
    <artifactId>QNAProject</artifactId>
    <version>0.1</version>
    <packaging>jar</packaging>

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

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

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

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>2.3.2</version>
                <configuration>
                    <source>1.6</source>
                    <target>1.6</target>
                </configuration>
            </plugin>

            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>exec-maven-plugin</artifactId>
                <version>1.2.1</version>
                <executions>
                    <execution>
                        <goals>
                            <goal>java</goal>
                        </goals>
                    </execution>
                </executions>
                <configuration>
                    <executable>maven</executable>
                    <mainClass>com.jadex.qna.QNAProject.App</mainClass>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

我什至尝试了来自多个站点的工作示例项目，
such as

http://examples.javacodegeeks.com/enterprise-java/maven/create-java-project-with-maven-example/ http://examples.javacodegeeks.com/enterprise-java/maven/create-java-project-with-maven-example/
http://www.mkyong.com/maven/how-to-create-a-java-project-with-maven/ http://www.mkyong.com/maven/how-to-create-a-java-project-with-maven/

但我得到了同样的错误。

我将 maven 解压到 C:\apache-maven-3.3.3 并创建环境变量 MAVEN_HOME 作为相同的路径。 问题是什么？

=====================================

编辑：这是结果

嗯..我设置了MAVEN_HOME，而不是M2_HOME，因为我发现的教程说只设置它......
当然， echo %MAVEN_HOME% 显示

C:\apache-maven-3.3.3

这是错的吗？

我将 %MAVEN_HOME%\bin 添加到 PATH 变量，但它也不起作用。
而且，我正在使用 eclipse

=======================================

EDIT2：这是完整的日志。我使用目标“clean exec:java -e -X”

由于太长，所以上传到我的博客了。
请注意，我将存储库文件夹从 C:\Users.....m2 更改为新的本地存储库文件夹 C:\apache-maven-localrepository

https://arincblossom.wordpress.com/2015/06/15/error-logs/ https://arincblossom.wordpress.com/2015/06/15/error-logs/

=========================================

EDIT3：我像这样更改了 maven-compiler-plugin 设置

        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.3</version>
            <configuration>
                <verbose>true</verbose>
                <fork>true</fork>
                <executable>${env.JAVA_HOME}/bin/javac</executable>
                <compilerVersion>1.5</compilerVersion>
                <!-- <source>1.8</source>
                <target>1.8</target> -->
            </configuration>
        </plugin>

它防止我犯错误mvn -e compile exec:java但我不能运行mvn exec:java -Dexec.mainClass="com.jadex.qna.QNAProject.App"

===================================

EDIT4：好的，我会从底部尝试，然后再次发布。感谢您的真诚帮助。

=======================================

EDIT5

我重置了所有序列...重新安装了 eclipse、maven..并重新创建了项目...但没有任何效果...

我更改了 eclipse 设置以将 JDK 路径修复为已安装的 jdk 路径，而不是 JRE 路径。然后我发现“mvn -e cleancompile exec：java”正在工作，但我只想“mvn clean exec：java”工作。它根本不起作用。

您可以在此处查看完整源代码

https://github.com/arincblossom/MavenTestProject https://github.com/arincblossom/MavenTestProject

这是“mvn -e clean exec:java”的当前控制台消息

[WARNING] 
[WARNING] Some problems were encountered while building the effective settings
[WARNING] expected START_TAG or END_TAG not TEXT (position: TEXT seen ...ore artifacts.\n   |\n   | Default: ${user.home}/.m2/repository\n  <l... @53:5)  @ C:\apache-maven-3.3.3\conf\settings.xml, line 53, column 5
[WARNING] expected START_TAG or END_TAG not TEXT (position: TEXT seen ...ore artifacts.\n   |\n   | Default: ${user.home}/.m2/repository\n  <l... @53:5)  @ C:\apache-maven-3.3.3\conf\settings.xml, line 53, column 5
[WARNING] 
[INFO] Scanning for projects...
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Building MavenTestProject 0.0.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ MavenTestProject ---
[INFO] Deleting C:\Users\bonavision_laptop\Desktop\Project\JadeX\MavenTestProject\MavenTestProject\target
[INFO] 
[INFO] --- exec-maven-plugin:1.4.0:java (default-cli) @ MavenTestProject ---
[WARNING] 
java.lang.ClassNotFoundException: com.jadex.qna.MavenTestProject.App
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:281)
    at java.lang.Thread.run(Thread.java:745)
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.900 s
[INFO] Finished at: 2015-06-15T17:42:19+09:00
[INFO] Final Memory: 8M/153M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.4.0:java (default-cli) on project MavenTestProject: An exception occured while executing the Java class. com.jadex.qna.MavenTestProject.App -> [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

当它与 eclipse 不兼容时，也会出现此问题。

Try this

mvn clean install eclipse:eclipse

如果可以帮助其他成员，请投票