Share some useful links (updated one after another)

OA function, Struts related
http://blog.csdn.net/btt2013/article/details/51068099
Android client to transfer file code to the background
http://blog.csdn.net/u013233097/article/details/52462717
Poor entry area Blockchain guide
https://blog.csdn.net/GitChat/article/details/79812010
Android webview vulnerability analysis
https://blog.csdn.net/jiangwei0910410003/article/details/79368602
SpringMVC detailed explanation
https://www.cnblogs .com/baiduligang/p/4247164.html