js get 传递到后台乱码的解决方法

JS页面
location.href="${pageContext.request.contextPath}/dd/dd!bb.action?userQueryEntity.userName="+encodeURI(key);
java页面
 String keyinfo = entity.getUserName();

  if(keyinfo!=null && !("").equals(keyinfo)){
   try {
    keyinfo= new String( keyinfo.getBytes("iso-8859-1"), "UTF-8");
   } catch (UnsupportedEncodingException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   }
}