修改mac系统java版本设置（10.8以后）
1> 打开终端：cd /System/Library/Frameworks/JavaVM.framework/Versions/ls -l
total 64
lrwxr-xr-x 1 root wheel 10 10 23 2013 1.4 -> CurrentJDK
lrwxr-xr-x 1 root wheel 10 10 23 2013 1.4.2 -> CurrentJDK
lrwxr-xr-x 1 root wheel 10 10 23 2013 1.5 -> CurrentJDK
lrwxr-xr-x 1 root wheel 10 10 23 2013 1.5.0 -> CurrentJDK
lrwxr-xr-x 1 root wheel 10 10 23 2013 1.6 -> CurrentJDK
lrwxr-xr-x 1 root wheel 10 10 23 2013 1.6.0 -> CurrentJDK
drwxr-xr-x 8 root wheel 272 11 4 2013 A
lrwxr-xr-x 1 root wheel 1 10 23 2013 Current -> A
lrwxr-xr-x 1 root wheel 59 10 23 2013 CurrentJDK -> /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents
可以看到 CurrentJDK 链接的是 jdk 1.6
2> 安装 jdk7 后的路径：/Library/Java/JavaVirtualMachines/jdk1.7.0_25.jdk
3> 移除CurrentJDK
sudo rm CurrentJDK
4> 重新链接
sudo ln -s /Library/Java/JavaVirtualMachines/jdk1.7.0_25.jdk/Contents/ CurrentJDK
5> 重新查看
cd /System/Library/Frameworks/JavaVM.framework/Versions/
ls -l
total 64
lrwxr-xr-x 1 root wheel 10 10 23 2013 1.4 -> CurrentJDK
lrwxr-xr-x 1 root wheel 10 10 23 2013 1.4.2 -> CurrentJDK
lrwxr-xr-x 1 root wheel 10 10 23 2013 1.5 -> CurrentJDK
lrwxr-xr-x 1 root wheel 10 10 23 2013 1.5.0 -> CurrentJDK
lrwxr-xr-x 1 root wheel 10 10 23 2013 1.6 -> CurrentJDK
lrwxr-xr-x 1 root wheel 10 10 23 2013 1.6.0 -> CurrentJDK
drwxr-xr-x 8 root wheel 272 11 4 2013 A
lrwxr-xr-x 1 root wheel 1 10 23 2013 Current -> A
lrwxr-xr-x 1 root wheel 59 5 13 18:37 CurrentJDK -> /Library/Java/JavaVirtualMachines/jdk1.7.0_25.jdk/Contents/
6> java -version
java version "1.7.0_25"
Java(TM) SE Runtime Environment (build 1.7.0_25-b15)
Java HotSpot(TM) 64-Bit Server VM (build 23.25-b01, mixed mode)
7>如果安装了mvn
mvn -version
Apache Maven 3.0.5 (r01de14724cdef164cd33c7c8c2fe155faf9602da; 2013-02-19 21:51:28+0800)
Maven home: /usr/local/Cellar/maven30/3.0.5/libexec
Java version: 1.7.0_25, vendor: Oracle Corporation
Java home: /Library/Java/JavaVirtualMachines/jdk1.7.0_25.jdk/Contents/Home/jre
Default locale: zh_CN, platform encoding: UTF-8
OS name: "mac os x", version: "10.9.2", arch: "x86_64", family: "mac"
ok
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