jsp插入mysql資料庫後亂碼的解決辦法

jsp 頁面用下面3句語句來保證是gbk 編碼
<%@ page session="true" %>
<%@ page contentType="text/html;charset=gbk" %>
<%@page pageEncoding="gbk"%>
<%request.setCharacterEncoding("gbk");%>

資料庫連接用如下語句
String sConnStr ="jdbc:mysql://localhost:3306/test?user=michael&password=123456&useUnicode=true&characterEncoding=gbk" ;
並且在mysql的my.ini的內容如下
basedir=D:/mysql
#bind-address=127.0.0.1
datadir=D:/mysql-data/data
default_character_set=gbk
#language=D:/mysql/share/your language directory
#slow query log#=
#tmpdir#=
#port=3306
#set-variable=key_buffer=16M
[WinMySQLadmin]
Server=D:/mysql/bin/mysqld-nt.exe
user=michael
password=123
[client]
default_character_set=gbk

讀jsp頁面之間傳遞的參數在頁面顯示正常
在dos命令列下插入資料後,顯示也正常

其中一條插入語句如下:

String strSQL="insert into chatreg(username , password , email ,homepage )
values("" + regName + "", "" + regPassword +"" , "" + regEmail + "" , "" + regHomepage + "") ";
reg.executeQuery(strSQL);