win7，下的java环境变量设置，以及JDK环境变量设置之类的-The Java win7 environment variable Settings

在win7系统环境下面，安装Java的JDK之后，还需要进行的环境变量的相关设置方法-Here in win7 system environment, after installing the Java JDK, also need to be related to the method of setting environment variables