js向后台传参数出现乱码

前台js代码块中对各个变量进行编码处理如下: 
var typeselect = form2.typeselect.value; 
//var typeselect = document.getElementById('typeselect').value; 
//怎么获得值得自己用自己的方式, 不一定要像我酱紫.. 

typeselect=encodeURI(typeselect); 
typeselect=encodeURI(typeselect); 
form2.action="xxxx.do?typeselect="+typeselect; 
form2.submit(); 

在后台进行获取: 
import java.net.URLDecoder; 

if (request.getParameter("typeselect") != null) { 
    typeid = request.getParameter("typeselect"); 
    typeid = URLDecoder.decode(typeid, "utf-8"); 
}