相关疑难解决方法(0)

可能是问题之前,但我发现非常奇怪的错误.当我mvn --version从bin 运行命令时,它会给出版本和其他信息.但是,当我在bin外面运行时,它会给出异常.结果都提到了下面

C:\Program Files\apache-maven-3.0.5-bin\apache-maven-3.0.5\bin>mvn --version
Apache Maven 3.0.5 (r01de14724cdef164cd33c7c8c2fe155faf9602da; 2013-02-19 19:21:
28+0530)
Maven home: C:\Program Files\apache-maven-3.0.5-bin\apache-maven-3.0.5
Java version: 1.7.0_25, vendor: Oracle Corporation
Java home: C:\Program Files\Java\jdk1.7.0_25\jre
Default locale: en_US, platform encoding: Cp1252
OS name: "windows 7", version: "6.1", arch: "amd64", family: "windows"

C:\Program Files\apache-maven-3.0.5-bin\apache-maven-3.0.5>mvn --version
'mvn' is not recognized as an internal or external command,
operable program or batch file.

另外我将JAVA_HOME设置在用户变量和M2_HOME中,M2在系统环境变量输出中

C:\Users\SAHILBHALLA>echo %JAVA_HOME%
C:\Program Files\Java\jdk1.7.0_25

C:\Users\SAHILBHALLA>echo %M2%
C:\Program Files\apache-maven-3.0.5-bin\apache-maven-3.0.5\bin

C:\Users\SAHILBHALLA>echo %M2_HOME%
C:\Program Files\apache-maven-3.0.5-bin\apache-maven-3.0.5

告诉我我错在哪里.我应该从中恢复什么？