使用httpclient访问网页，进行留言时出现了中文乱码，用的是post方法，麻烦大家看下程序

import org.apache.commons.httpclient.*;import org.apache.commons.httpclient.cookie.*;import org.apache.commons.httpclient.methods.*;
public class FormLoginDemo {    static final String LOGON_SITE = "127.0.0.1";    static final int    LOGON_PORT = 8080;        public static void main(String[] args) throws Exception{        HttpClient client = new HttpClient();        client.getHostConfiguration().setHost(LOGON_SITE, LOGON_PORT);              //模拟登录页面        PostMethod post = new PostMethod("/os/checkuser.jsp");

        NameValuePair name = new NameValuePair("username", "admin");             NameValuePair pass = new NameValuePair("password", "admin");             post.setRequestBody(new NameValuePair[]{name,pass});       int status = client.executeMethod(post);
       
   System.out.println("登录通过");        post.releaseConnection();  
       //访问所需的页面        PostMethod post1 = new PostMethod("/os/submit.jsp");

NameValuePair title=new   NameValuePair("title",   new String("测试3".getBytes("iso8859_1")));
NameValuePair title = new NameValuePair("title", "测试3"); 
post1.setRequestBody(new NameValuePair[]{title,content});
client.executeMethod(post1); System.out.println(post1.getResponseBodyAsString());
post1.releaseConnection();      }}要接收数据的jsp网页部分源码如下：<%@ page contentType="text/html; charset=gb2312" language="java" import="java.sql.*" errorPage="" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<jsp:useBean id="dbconn" scope="page" class="os.osconn"/>
<html>
<head>
<META http-equiv=Content-Type content="text/html; charset=gb2312">
<link rel="stylesheet" href="b.css" type="text/css">
<title>题目</title>
</head>
<body><div id="c">
<div id="c1"></div>
<div id="c2">
<%
if(session.getAttribute("roleid")!=null&&!session.getAttribute("roleid").equals(""))
{
String sTitle = new String(request.getParameter("title").getBytes("iso8859_1"));
String sContent = new String(request.getParameter("content1").getBytes("iso8859_1"));
略………………………………