jsp+mysql中sql语句中的中文问题

环境：tomcat5+jdk6+mysql5
String type=new  String(request.getParameter("type").getBytes("8859_1"),"GBK");传参是“中文”
"select * from t1 where t1.type='"+type+"'";
这个是可以的，而
"select * from t1 where t1.type='中文'";
就不行，报错是中文部分是乱码
String type=“中文”;
"select * from t1 where t1.type='"+type+"'";
这个也是错的
String type=“中文”;
type= new String(type.getBytes("gbk"));
"select * from t1 where t1.type='"+type+"'";
也不行

数据库编码gbk

页面编码：
<%@ page contentType="text/html; charset=gbk" language="java" import="java.sql.*,java.util.Date,java.util.*,java.io.*" errorPage="" %>
<meta http-equiv="Content-Type" content="text/html; charset=gbk" />

Connection编码：characterEncoding=GBK"

mysql> show variables like 'character\_set\_%';
+--------------------------+--------+
| Variable_name            | Value  |
+--------------------------+--------+
| character_set_client    | gbk    |
| character_set_connection | gbk    |
| character_set_database  | gbk  &nb