我的maven项目面临着奇怪的错误。当我编译项目时，我遇到了异常
[ERROR] (use -source 5 or higher to enable for-each loops)
[ERROR] /home/ashish/code/arena/JUnit/src/main/java/com/tutorial/junit/controller/DefaultController.java:[14,15] error: generics are not supported in -source 1.3
[ERROR] -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.0.2:compile (default-compile) on project junit: Compilation failure
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:213)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:320)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
Caused by: org.apache.maven.plugin.CompilationFailureException: Compilation failure
at org.apache.maven.plugin.AbstractCompilerMojo.execute(AbstractCompilerMojo.java:516)
at org.apache.maven.plugin.CompilerMojo.execute(CompilerMojo.java:114)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
我真的不知道为什么我会遇到这个错误，因为我正在使用jdk 1.8和maven 3.0.5并且项目在eclipse luna中完美编译。
ashish@ashish-ThinkPad-Edge-E430:~/code/arena/JUnit$ mvn -version
Apache Maven 3.0.5
Maven home: /usr/share/maven
Java version: 1.8.0_05, vendor: Oracle Corporation
Java home: /usr/lib/jvm/java-8-oracle/jre
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "3.13.0-30-generic", arch: "amd64", family: "unix"
这是我的pom文件的内容。
<?xml version="1.0"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<modelVersion>4.0.0</modelVersion>
<groupId>com.tutorial</groupId>
<artifactId>junit</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>Junit tutorial</name>
<description>This project contain the files used in the JUnit tutorial</description>
<properties>
<powermock.version>1.5.5</powermock.version>
</properties>
<dependencies>
<dependency>
<groupId>org.easymock</groupId>
<artifactId>easymock</artifactId>
<version>3.2</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-all</artifactId>
<version>1.9.5</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.powermock</groupId>
<artifactId>powermock-module-junit4</artifactId>
<version>1.5.5</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.powermock</groupId>
<artifactId>powermock-api-mockito</artifactId>
<version>1.5.5</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-server</artifactId>
<version>9.2.1.v20140609</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-servlet</artifactId>
<version>9.2.1.v20140609</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.apache.cactus</groupId>
<artifactId>cactus</artifactId>
<version>1.8.1</version>
<type>pom</type>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.apache.cactus</groupId>
<artifactId>cactus.core.framework.javaEE.12-13-14</artifactId>
<version>1.8.1</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>commons-codec</groupId>
<artifactId>commons-codec</artifactId>
<version>1.9</version>
<scope>compile</scope>
</dependency>
</dependencies>
<repositories>
<repository>
<snapshots>
<enabled>false</enabled>
</snapshots>
<id>central</id>
<name>Central Repository</name>
<url>http://repo.maven.apache.org/maven2</url>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<releases>
<updatePolicy>never</updatePolicy>
</releases>
<snapshots>
<enabled>false</enabled>
</snapshots>
<id>central</id>
<name>Central Repository</name>
<url>http://repo.maven.apache.org/maven2</url>
</pluginRepository>
</pluginRepositories>
<build>
<sourceDirectory>/home/ashish/code/arena/JUnit/src/main/java</sourceDirectory>
<scriptSourceDirectory>/home/ashish/code/arena/JUnit/src/main/scripts</scriptSourceDirectory>
<testSourceDirectory>/home/ashish/code/arena/JUnit/src/test/java</testSourceDirectory>
<outputDirectory>/home/ashish/code/arena/JUnit/target/classes</outputDirectory>
<testOutputDirectory>/home/ashish/code/arena/JUnit/target/test-classes</testOutputDirectory>
<resources>
<resource>
<directory>/home/ashish/code/arena/JUnit/src/main/resources</directory>
</resource>
</resources>
<testResources>
<testResource>
<directory>/home/ashish/code/arena/JUnit/src/test/resources</directory>
</testResource>
</testResources>
<directory>/home/ashish/code/arena/JUnit/target</directory>
<finalName>junit-0.0.1-SNAPSHOT</finalName>
<pluginManagement>
<plugins>
<plugin>
<artifactId>maven-antrun-plugin</artifactId>
<version>1.3</version>
</plugin>
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<version>2.2-beta-5</version>
</plugin>
<plugin>
<artifactId>maven-dependency-plugin</artifactId>
<version>2.8</version>
</plugin>
<plugin>
<artifactId>maven-release-plugin</artifactId>
<version>2.3.2</version>
</plugin>
</plugins>
</pluginManagement>
<plugins>
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>2.5</version>
<executions>
<execution>
<id>default-clean</id>
<phase>clean</phase>
<goals>
<goal>clean</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>2.6</version>
<executions>
<execution>
<id>default-testResources</id>
<phase>process-test-resources</phase>
<goals>
<goal>testResources</goal>
</goals>
</execution>
<execution>
<id>default-resources</id>
<phase>process-resources</phase>
<goals>
<goal>resources</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-jar-plugin</artifactId>
<version>2.4</version>
<executions>
<execution>
<id>default-jar</id>
<phase>package</phase>
<goals>
<goal>jar</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.5.1</version>
<executions>
<execution>
<id>default-compile</id>
<phase>compile</phase>
<goals>
<goal>compile</goal>
</goals>
</execution>
<execution>
<id>default-testCompile</id>
<phase>test-compile</phase>
<goals>
<goal>testCompile</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.12.4</version>
<executions>
<execution>
<id>default-test</id>
<phase>test</phase>
<goals>
<goal>test</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-install-plugin</artifactId>
<version>2.4</version>
<executions>
<execution>
<id>default-install</id>
<phase>install</phase>
<goals>
<goal>install</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<version>2.7</version>
<executions>
<execution>
<id>default-deploy</id>
<phase>deploy</phase>
<goals>
<goal>deploy</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-site-plugin</artifactId>
<version>3.3</version>
<executions>
<execution>
<id>default-site</id>
<phase>site</phase>
<goals>
<goal>site</goal>
</goals>
<configuration>
<outputDirectory>/home/ashish/code/arena/JUnit/target/site</outputDirectory>
<reportPlugins>
<reportPlugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-project-info-reports-plugin</artifactId>
</reportPlugin>
</reportPlugins>
</configuration>
</execution>
<execution>
<id>default-deploy</id>
<phase>site-deploy</phase>
<goals>
<goal>deploy</goal>
</goals>
<configuration>
<outputDirectory>/home/ashish/code/arena/JUnit/target/site</outputDirectory>
<reportPlugins>
<reportPlugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-project-info-reports-plugin</artifactId>
</reportPlugin>
</reportPlugins>
</configuration>
</execution>
</executions>
<configuration>
<outputDirectory>/home/ashish/code/arena/JUnit/target/site</outputDirectory>
<reportPlugins>
<reportPlugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-project-info-reports-plugin</artifactId>
</reportPlugin>
</reportPlugins>
</configuration>
</plugin>
</plugins>
</build>
<reporting>
<outputDirectory>/home/ashish/code/arena/JUnit/target/site</outputDirectory>
</reporting>
</project>
带有-X标志的maven的前几行
ashish@ashish-ThinkPad-Edge-E430:~/code/arena/JUnit$ mvn clean compile -X
Apache Maven 3.0.5
Maven home: /usr/share/maven
Java version: 1.8.0_05, vendor: Oracle Corporation
Java home: /usr/lib/jvm/java-8-oracle/jre
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "3.13.0-30-generic", arch: "amd64", family: "unix"
[INFO] Error stacktraces are turned on.
[DEBUG] Reading global settings from /usr/share/maven/conf/settings.xml
[DEBUG] Reading user settings from /home/ashish/.m2/settings.xml
[DEBUG] Using local repository at /home/ashish/.m2/repository
[DEBUG] Using manager EnhancedLocalRepositoryManager with priority 10 for /home/ashish/.m2/repository
[INFO] Scanning for projects...
[DEBUG] Extension realms for project com.tutorial:junit:jar:0.0.1-SNAPSHOT: (none)
[DEBUG] Looking up lifecyle mappings for packaging jar from ClassRealm[plexus.core, parent: null]
[DEBUG] === REACTOR BUILD PLAN ================================================
[DEBUG] Project: com.tutorial:junit:jar:0.0.1-SNAPSHOT
[DEBUG] Tasks: [clean, compile]
[DEBUG] Style: Regular
[DEBUG] =======================================================================
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building Junit tutorial 0.0.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
答案 0 :(得分：4)
您需要在<source>的{{1}}部分设置<target>和<configuration>版本。
以下是一个例子：
maven-compiler-plugin这是Maven网站上的well documented。
答案 1 :(得分：2)
有些东西告诉我它不是完整的pom.xml文件。
您正在使用非常低的Java版本编译项目。可能是1.4或1.3（甚至更低）。赠品是你不能用于每个循环的错误，它们是在Java 5（或1.5）中添加的。
即使您使用的是1.8 JVM，请记住Java往往具有非常好的向后兼容性，因此您可以将源代码编译为低于JVM版本的级别。我会检查maven-compiler-plugin的maven项目/ build / plugins / plugin区域，看看是否为某个特定版本配置了它。
我还会使用-X标志运行maven并查看编译器插件的配置参数。
在这两者之间，您可能能够确定您的问题。