maven在Mac OS X上没有使用Java

Question

我为Mac OS X下载了最新版本的JDK8,并且还安装了maven.但是,我似乎在Java和maven之间存在不兼容性:

myusername$ mvn -version
    Exception in thread "main" java.lang.UnsupportedClassVersionError: org/apache/maven/cli/MavenCli : Unsupported major.minor version 51.0
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClassCond(ClassLoader.java:637)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
        at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
        at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClassFromSelf(ClassRealm.java:401)
        at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:42)
        at org.codehaus.plexus.classworlds.realm.ClassRealm.unsynchronizedLoadClass(ClassRealm.java:271)
        at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:254)
        at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:239)
        at org.codehaus.plexus.classworlds.launcher.Launcher.getMainClass(Launcher.java:144)
        at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:266)
        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)

我在用:

myusername$ javac -version
javac 1.8.0_45

如何让Java和maven相互兼容？

从可能的重复问题尝试的说明:Maven安装OSX错误不支持major.minor版本51.0:

myusername$ export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.6.0_65.jdk/Contents/Home
myusername$ mvn -version
Error: JAVA_HOME is not defined correctly.
  We cannot execute /Library/Java/JavaVirtualMachines/jdk1.6.0_65.jdk/Contents/Home/bin/java

Answer 1

在JAVA_HOMEMac上的1.6.x版的Java版本是/Library/Java/Home唯一的Java 7和更高下方安装/Library/Java/JavaVirtualMachines

执行/usr/libexec/java_home -version 1.8以获取当前的1.8 Java Home.我export JAVA_HOME=$(/usr/libexec/java_home -version 1.8)用来设置我的正确JAVA_HOME