前台编码
var params = "query=" + encodeURI(encodeURI(queryString))+ "&attribute=" + encodeURI(encodeURI(obj));
后台解码：
attribute = URLDecoder.decode(attribute, "UTF-8"); query = URLDecoder.decode(query, "UTF-8");
原文：http://www.cnblogs.com/estellez/p/4527085.html