方法1:

url="xxx.jsp?id="+java.net.URLEncoder.encode("中文", "UTF-8")

在这里,我们要用java.net.URLEncoder.encode("中文", "UTF-8")

接收时,我们用
String inf=request.getParameter("id");
inf= new String(inf.getBytes("iso-8859-1"),"UTF-8");

方法2:

js
var title = document.getElementById("title");
var url = "xxx.jsp?title="+encodeURI(title.value);
jsp
String title = new String(request.getParameter("qTitle").getBytes("iso-8859-1"),"UTF-8");