url乱码问题

//url乱码，有时候要解码2次才能成功

String url=URLDecoder.decode(URLDecoder.decode(returnUrl, "UTF-8"),"UTF-8");

 

示例：

 http%25253A%25252F%25252Fsell.com %25252F%252523%25252Forder%25252F1509276117525461009