Maven编译失败（但在Eclipse下编译成功）

Question

在使用 Eclipse 构建我的Web项目时，一切都很好：没有错误，也没有警告。

然而，在使用 Maven 构建项目时出现了 错误。下面是输出的 mvn compile 结果：

c:\Users\jwa\Desktop\tets\traffic_web>mvn compile -e + Error stacktraces are turned on. [INFO] Scanning for projects... [INFO] ------------------------------------------------------------------------ [INFO] Building traffic_web [INFO] task-segment: [compile] [INFO] ------------------------------------------------------------------------ [INFO] [resources:resources {execution: default-resources}] [WARNING] Using platform encoding (Cp1250 actually) to copy filtered resources, i.e. build is platform dependent! [INFO] skip non existing resourceDirectory c:\Users\jwa\Desktop\tets\traffic_web\src\main\resources [INFO] [compiler:compile {execution: default-compile}] [INFO] Compiling 22 source files to c:\Users\jwa\Desktop\tets\traffic_web\target\classes [INFO] ------------------------------------------------------------------------ [ERROR] BUILD FAILURE [INFO] ------------------------------------------------------------------------ [INFO] Compilation failure c:\Users\jwa\Desktop\tets\traffic_web\src\traffic_web\tools\Encryptor.java:[7,15] sun.misc.BASE64Encoder is Sun proprietary API and may be removed in a future release c:\Users\jwa\Desktop\tets\traffic_web\src\traffic_web\tools\Session.java:[3,25] package javax.servlet.http does not exist c:\Users\jwa\Desktop\tets\traffic_web\src\traffic_web\tools\Session.java:[15,21] cannot find symbol symbol: class HttpSession location: class traffic_web.tools.Session c:\Users\jwa\Desktop\tets\traffic_web\src\traffic_web\tools\ServletContextListenerInitializer.java:[6,20] package javax.servlet does not exist c:\Users\jwa\Desktop\tets\traffic_web\src\traffic_web\tools\ServletContextListenerInitializer.java:[7,20] package javax.servlet does not exist c:\Users\jwa\Desktop\tets\traffic_web\src\traffic_web\tools\ServletContextListenerInitializer.java:[8,20] package javax.servlet does not exist c:\Users\jwa\Desktop\tets\traffic_web\src\traffic_web\tools\ServletContextListenerInitializer.java:[10,58] cannot find symbol symbol: class ServletContextListener public class ServletContextListenerInitializer implements ServletContextListener { c:\Users\jwa\Desktop\tets\traffic_web\src\traffic_web\tools\ServletContextListenerInitializer.java:[12,33] cannot find symbol symbol: class ServletContextEvent location: class traffic_web.tools.ServletContextListenerInitializer c:\Users\jwa\Desktop\tets\traffic_web\src\traffic_web\tools\ServletContextListenerInitializer.java:[15,35] cannot find symbol symbol: class ServletContextEvent location: class traffic_web.tools.ServletContextListenerInitializer c:\Users\jwa\Desktop\tets\traffic_web\src\traffic_web\controller\BoardController.java:[9,25] package javax.servlet.http does not exist c:\Users\jwa\Desktop\tets\traffic_web\src\traffic_web\controller\BoardController.java:[87,29] cannot find symbol symbol: class HttpServletResponse location: class traffic_web.controller.BoardController c:\Users\jwa\Desktop\tets\traffic_web\src\traffic_web\controller\BoardController.java:[116,37] cannot find symbol symbol: class HttpServletResponse location: class traffic_web.controller.BoardController c:\Users\jwa\Desktop\tets\traffic_web\src\traffic_web\tools\Encryptor.java:[27,15] sun.misc.BASE64Encoder is Sun proprietary API and may be removed in a future release c:\Users\jwa\Desktop\tets\traffic_web\src\traffic_web\tools\Session.java:[17,27] cannot access javax.servlet.http.HttpServletRequest class file for javax.servlet.http.HttpServletRequest not found return attr.getRequest().getSession(true); // true == allow create c:\Users\jwa\Desktop\tets\traffic_web\src\traffic_web\tools\ServletContextListenerInitializer.java:[17,8] cannot find symbol symbol: class ServletContext location: class traffic_web.tools.ServletContextListenerInitializer [INFO] ------------------------------------------------------------------------ [INFO] Trace org.apache.maven.BuildFailureException: Compilation failure at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:715) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:556) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:535) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:387) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:348) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:180) at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328) at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138) at org.apache.maven

我的POM文件如下：

<project>
  <modelVersion>4.0.0</modelVersion>
  <groupId>masters.traffic</groupId>
  <artifactId>traffic_web</artifactId>
  <packaging>war</packaging>
  <name>traffic_web</name>
  <version>0.1.0</version>
  <build>
        <sourceDirectory>src</sourceDirectory>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.6</source>
                    <target>1.6</target>                    
                </configuration>
            </plugin>
        </plugins>
  </build>

    ...

</project>

有人可以帮我解决这个问题吗？

谢谢！

- jwaliszko

Answer 1

您还没有将servlet类添加为依赖项。这些类在Eclipse中似乎默认存在，这就是为什么从那里编译可以工作的原因。请在您的pom文件中添加以下内容（在<build>...之前），取自这里：

<dependencies>
  [...]
  <dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>servlet-api</artifactId>
    <version>2.4</version>
    <scope>provided</scope>
  </dependency>
</dependencies>

- Alexander Torstling