文件读写几种形式
http://www.cnblogs.com/qianbi/p/3378466.html
java的get post请求
http://www.cnblogs.com/zhuawang/archive/2012/12/08/2809380.html
http://blog.csdn.net/ppdouble/article/details/22294479
httpClient的get post请求
http://blog.csdn.net/caesardadi/article/details/8621595
http://risheng.iteye.com/blog/1876573
