大家好，想请教大虾们一个JSP乱码问题，我的操作系统和mysql都是设置BGK编码，但在index.jsp点击提交留言转到新页面出现乱码，打开数据库数据也是乱码，请大侠们指教：代码如下：
1.index.jsp
<%@ page language="java" import="java.util.*" pageEncoding="GBK"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme() + "://"
+ request.getServerName() + ":" + request.getServerPort()
+ path + "/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<HTML>
<HEAD>
<TITLE>message board </TITLE>
</HEAD>
<BODY>
<TABLE width="1178" align="center" border=1 cellspacing="0"
cellpadding="0" bordercolordark="#88a6dd" bordercolorlight="#88a6dd" height="304">
<TR>
<TD align="center" bgcolor="#88a6dd">
访客留言板
</TD>
</TR>
<TR>
<TD>
<TABLE align="center" border=1 cellspacing="0" cellpadding="0"
bordercolordark="#88a6dd" bordercolorlight="#88a6dd">
<form ACTION=&q
