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

問題：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] 

解決：

1、mvn -v 顯示結果如下，

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設置如下：

 <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <version>3.2</version>
                    <configuration>
                        <source>1.7</source>
                        <target>1.7</target>
                        <encoding>${project.build.sourceEncoding}</encoding>
                    </configuration>
                </plugin>

3、但是java -version 的結果如下：

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、編譯沒有使用到1.7，設置maven的java home  爲1.7（本機設置了多版本的jdk）

修改maven的配置，java_home指向 1.7 ,/etc/mavenrc 和 ~/.mavenrc。兩個文件默認不存在，需要新建，可以任選一個

比如：vi  ~/.mavenrc

寫入：

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

5、再mvn -v ，結果如下：

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、解決