如果报错
Exception in thread "main" java.lang.UnsupportedClassVersionError: org/apache/ma ven/cli/MavenCli : Unsupported major.minor version 51.0 at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631) at java.lang.ClassLoader.defineClass(ClassLoader.java:615) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:14 1) 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(Cl assRealm.java:401) at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass( SelfFirstStrategy.java:42) at org.codehaus.plexus.classworlds.realm.ClassRealm.unsynchronizedLoadCl ass(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(Launch er.java:144) at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Laun cher.java:266) at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.jav a:229) at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(La uncher.java:415) at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java: 356)
从以上信息可以看出,Maven没有配置成功,根据报错信息可以初步判定是JDK版本与Maven版本冲突了,需要换JDK版本!
卸载掉JDK1.8版本的,安装JDK1.7版本,配置好环境变量(配置方法参考之前博客文章),