零碎知识点

1.取以逗号分隔的字段

String str = "ax,cv,df";

String [] str2 = str.split(",");

2.js中截取最后一个逗号之前的字符串

var msg2 = str2.substring(0, str2.lastIndexOf(','));

3.自动刷新
response.setHeader("Refresh","10;URL=index.jsp");