Maven is a software project management and comprehension tool. Based on
  the concept of a Project Object Model (POM), Maven can manage a project's
  build, reporting and documentation from a central piece of information.
 
         now we got it .it is a tool which can manage and  comprehend  our project .

         系统需求，一般我们都能达到，忽略。

 System Requirements
  -------------------

  JDK:
    1.4 or above (this is to execute Maven - it still allows you to build against 1.3
    and prior JDK's).
  Memory:
    No minimum requirement.
  Disk:
    No minimum requirement. Approximately 100MB will be used for your local repository,
    however this will vary depending on usage and can be removed and redownloaded at
    any time.
  Operating System:
    No minimum requirement. On Windows, Windows NT and above or Cygwin is required for
    the startup scripts. Tested on Windows XP, Fedora Core and Mac OS X.s
       
         下一步，安装。我建议看看文档。
 
  Installing Maven
  ----------------

  1) Unpack the archive where you would like to store the binaries, eg:

    Unix-based Operating Systems (Linux, Solaris and Mac OS X)
      tar zxvf apache-maven-2.0.x.tar.gz
    Windows 2000/XP
      unzip apache-maven-2.0.x.zip

  2) A directory called "apache-maven-2.0.x" will be created.

  3) Add the bin directory to your PATH, eg:

    Unix-based Operating Systems (Linux, Solaris and Mac OS X)
      export PATH=/usr/local/apache-maven-2.0.x/bin:$PATH
    Windows 2000/XP
      set PATH="c:\program files\apache-maven-2.0.x\bin";%PATH%

  4) Make sure JAVA_HOME is set to the location of your JDK


         我用的是winXP，看这句就可以了。

         set PATH="c:\program files\apache-maven-2.0.x\bin";%PATH% 

        其中 “c:\program files\apache-maven-2.0.x\bin”为maven2解压路径。

        最后一步测试一下是否成功。

  5) Run "mvn --version" to verify that it is correctly installed.

        


        OK，it works~~~