"C:\Program Files\Java\jdk-17\bin\java.exe" -Dmaven.multiModuleProjectDirectory=D:\360极速浏览器X下载\JSP\demo4 -Djansi.passthrough=true -Dmaven.home=C:\Users\Lenovo\.m2\wrapper\dists\apache-maven-3.9.6-bin\439sdfsg2nbdob9ciift5h5nse\apache-maven-3.9.6 -Dclassworlds.conf=C:\Users\Lenovo\.m2\wrapper\dists\apache-maven-3.9.6-bin\439sdfsg2nbdob9ciift5h5nse\apache-maven-3.9.6\bin\m2.conf "-Dmaven.ext.class.path=D:\JDK17\IntelliJ IDEA 2024.2.4\plugins\maven\lib\maven-event-listener.jar" "-javaagent:D:\JDK17\IntelliJ IDEA 2024.2.4\lib\idea_rt.jar=60563:D:\JDK17\IntelliJ IDEA 2024.2.4\bin" -Dfile.encoding=UTF-8 -classpath C:\Users\Lenovo\.m2\wrapper\dists\apache-maven-3.9.6-bin\439sdfsg2nbdob9ciift5h5nse\apache-maven-3.9.6\boot\plexus-classworlds-2.7.0.jar;C:\Users\Lenovo\.m2\wrapper\dists\apache-maven-3.9.6-bin\439sdfsg2nbdob9ciift5h5nse\apache-maven-3.9.6\boot\plexus-classworlds.license org.codehaus.classworlds.Launcher -Didea.version=2024.2.4 -Dexec.workingdir=D:/360极速浏览器X下载/JSP/demo4 "-Dexec.args=-classpath %classpath com.example.orm.ORMExample" "-Dexec.executable=C:\Program Files\Java\jdk-17\bin\java.exe" exec:exec [INFO] Scanning for projects... [INFO] [INFO] -------------------------< org.example:demo4 >-------------------------- [INFO] Building demo4 1.0-SNAPSHOT [INFO] from pom.xml [INFO] --------------------------------[ war ]--------------------------------- [INFO] [INFO] --- exec:3.5.0:exec (default-cli) @ demo4 --- ����: �Ҳ��������������� com.example.orm.ORMExample ԭ��: java.lang.ClassNotFoundException: com.example.orm.ORMExample [ERROR] Command execution failed. org.apache.commons.exec.ExecuteException: Process exited with an error: 1 (Exit value: 1) at org.apache.commons.exec.DefaultExecutor.executeInternal (DefaultExecutor.java:355) at org.apache.commons.exec.DefaultExecutor.execute (DefaultExecutor.java:253) at org.codehaus.mojo.exec.ExecMojo.executeCommandLine (ExecMojo.java:903) at org.codehaus.mojo.exec.ExecMojo.executeCommandLine (ExecMojo.java:863) at org.codehaus.mojo.exec.ExecMojo.execute (ExecMojo.java:454) at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:126) at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute2 (MojoExecutor.java:328) at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute (MojoExecutor.java:316) at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:212) at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:174) at org.apache.maven.lifecycle.internal.MojoExecutor.access$000 (MojoExecutor.java:75) at org.apache.maven.lifecycle.internal.MojoExecutor$1.run (MojoExecutor.java:162) at org.apache.maven.plugin.DefaultMojosExecutionStrategy.execute (DefaultMojosExecutionStrategy.java:39) at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:159) at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:105) at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:73) at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:53) at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:118) at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:261) at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:173) at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:101) at org.apache.maven.cli.MavenCli.execute (MavenCli.java:906) at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:283) at org.apache.maven.cli.MavenCli.main (MavenCli.java:206) at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method) at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:77) at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke (Method.java:568) at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:283) at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:226) at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:407) at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:348) at org.codehaus.classworlds.Launcher.main (Launcher.java:47) [INFO] ------------------------------------------------------------------------ [INFO] BUILD FAILURE [INFO] ------------------------------------------------------------------------ [INFO] Total time: 0.946 s [INFO] Finished at: 2025-05-20T20:39:04+08:00 [INFO] ------------------------------------------------------------------------ [ERROR] Failed to execute goal org.codehaus.mojo:exec-maven-plugin:3.5.0:exec (default-cli) on project demo4: Command execution failed.: Process exited with an error: 1 (Exit value: 1) -> [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 进程已结束,退出代码为 1
时间: 2025-05-31 17:41:02 浏览: 13
### 回答问题
#### 1. 错误原因分析
从日志中可以看出,Maven在执行`exec:exec`目标时失败了,原因是无法找到类`com.example.orm.ORMExample`。具体错误信息如下:
- `java.lang.ClassNotFoundException: com.example.orm.ORMExample`
这表明以下几种可能性之一导致了该问题:
1. **类未编译**:`ORMExample`类可能未被正确编译到`target/classes`目录中。
2. **包路径错误**:`ORMExample`类的实际包路径可能与`com.example.orm`不一致。
3. **插件配置错误**:`exec-maven-plugin`的配置可能不正确,导致无法正确加载类。
---
#### 2. 解决方法
##### 方法一:检查类是否被正确编译
确保`ORMExample`类已存在于`src/main/java/com/example/orm/ORMExample.java`文件中,并且其包声明为`package com.example.orm;`。
例如:
```java
package com.example.orm;
public class ORMExample {
public static void main(String[] args) {
System.out.println("ORM Example is running!");
}
}
```
运行以下命令以确保类被正确编译:
```bash
mvn clean compile
```
检查`target/classes/com/example/orm/ORMExample.class`文件是否存在。如果不存在,请重新检查代码路径和包声明。
---
##### 方法二:检查`exec-maven-plugin`配置
确保`pom.xml`文件中正确配置了`exec-maven-plugin`插件。以下是正确的配置示例:
```xml
<build>
<plugins>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<version>3.5.0</version>
<configuration>
<mainClass>com.example.orm.ORMExample</mainClass>
</configuration>
</plugin>
</plugins>
</build>
```
然后运行以下命令以执行插件:
```bash
mvn exec:java
```
如果仍然报错,请尝试使用以下命令明确指定`classpath`和主类:
```bash
mvn exec:exec -Dexec.executable="java" -Dexec.args="-cp %classpath com.example.orm.ORMExample"
```
---
##### 方法三:检查IDE配置
如果你使用的是IDE(如IntelliJ IDEA),请确保以下设置正确:
1. **模块路径**:确保`src/main/java`目录被标记为`Sources Root`。
2. **依赖项**:确保所有依赖项已被正确下载并添加到项目中。
3. **编译输出路径**:确保编译输出路径为`target/classes`。
---
### 给出解释
1. **为什么会出现`ClassNotFoundException`?**
- 当Java虚拟机尝试加载某个类时,如果该类未被编译或不在类路径中,则会抛出`ClassNotFoundException`。
- 在Maven项目中,通常是因为类未被正确编译或插件配置错误。
2. **如何避免类似问题?**
- 确保所有源代码都被正确放置在`src/main/java`目录下。
- 正确配置`pom.xml`文件中的插件。
- 使用`mvn clean install`命令以确保项目被完全构建。
3. **`exec-maven-plugin`的作用是什么?**
- 该插件允许你在Maven生命周期中直接运行Java类或外部命令。
- 它通过`mainClass`属性指定要运行的主类。
---
###
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