【Maven】Fatal error compiling: invalid target release: 1.7 -> [Help 1]

问题：Fatal error compiling: invalid target release: 1.7 -> [Help 1]

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.2:compile (default-compile) on project bugkillers-core: Fatal error compiling: invalid target release: 1.7 -> [Help 1]

[ERROR] 

解决：

1、mvn -v 显示结果如下，

Apache Maven 3.2.5 (12a6b3acb947671f09b81f49094c53f426d8cea1; 2014-12-15T01:29:23+08:00)
Maven home: /usr/share/java/apache-maven-3.2.5
Java version: 1.6.0_65, vendor: Apple Inc.
Java home: /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home
Default locale: en_US, platform encoding: MacRoman
OS name: "mac os x", version: "10.9.2", arch: "x86_64", family: "mac"

2、pom设置如下：

 
                    org.apache.maven.plugins
                    maven-compiler-plugin
                    3.2
                    
                        1.7
                        1.7
                        ${project.build.sourceEncoding}
                    
                

3、但是java -version 的结果如下：

java version "1.7.0_79"
Java(TM) SE Runtime Environment (build 1.7.0_79-b15)
Java HotSpot(TM) 64-Bit Server VM (build 24.79-b02, mixed mode)

4、编译没有使用到1.7，设置maven的java home  为1.7（本机设置了多版本的jdk）

修改maven的配置，java_home指向 1.7 ,/etc/mavenrc 和 ~/.mavenrc。两个文件默认不存在，需要新建，可以任选一个

比如：vi  ~/.mavenrc

写入：

JAVA_HOME=`/usr/libexec/java_home -v 1.7`

5、再mvn -v ，结果如下：

Apache Maven 3.2.5 (12a6b3acb947671f09b81f49094c53f426d8cea1; 2014-12-15T01:29:23+08:00)
Maven home: /usr/share/java/apache-maven-3.2.5
Java version: 1.7.0_79, vendor: Oracle Corporation
Java home: /Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/jre
Default locale: en_US, platform encoding: UTF-8
OS name: "mac os x", version: "10.9.2", arch: "x86_64", family: "mac"

6、解决