jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
     pageEncoding="UTF-8"%>

<script type="text/javascript" charset="UTF-8">
   window.onload=function()
   {
     Event.observe('zipCodeField','blur',validateZipCode);
     $('addressField').focus();
   }
   function validateZipCode(event) {
        new Ajax.Request('servlet/ZipCodeValidatorServlet',
          {
            method: 'get',
            parameters: $('infoForm').serialize(true),
            onSuccess: function (transport) {
              if (transport.responseText.length != 0)
                //alert(transport.responseText);
                $('info').innerHTML=transport.responseText;
            }
          }
        );
      }
 </script>

servlet

StringBuilder result=new StringBuilder();
response.setContentType("text/html;charset=UTF-8");   
request.setCharacterEncoding("UTF-8"); 
String zipCodeValue=new String(request.getParameter("zipCode").getBytes("ISO-8859-1"), "UTF-8");
System.out.println(zipCodeValue);
String address=new String(request.getParameter("address").getBytes("ISO-8859-1"), "UTF-8");
System.out.println(address);
result.append(address);
response.getWriter().write(result.toString());

为什么get方式提交没有问题post提交出现乱码