字符加密Md5，ascii

数据加密和解密：

https://www.cnblogs.com/itgungnir/p/6210936.html

 

字符串转化为Ascii码：

https://www.cnblogs.com/yejiurui/archive/2013/05/19/3086831.html

 

java自带工具转换ascii

https://www.aliyun.com/jiaocheng/588209.html

Java字符串跟ASCII码互转

http://www.cnblogs.com/fengwenzhee/p/7239822.html