mysql5.5乱码解决方案

1、先卸载mysql5.5,将所有mysql的文件夹都删除包括注册表里的

    1、HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Eventlog\Application\MySQL 目录删除
    2、HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Services\Eventlog\Application\MySQL 目录删除
　 3、HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Eventlog\Application\MySQL 目录删除

2、重新安装mysql5.5,注意选择字符集时要选utf8

3、修改my.ini文件夹里的

    [mysql]

    default-character-set=gbk

4、重启服务，然后在mysql client执行下列命令查看，如果有这样的结果就OK

mysql> show variables like 'chara%';
+--------------------------+----------------------------------------------------
-----+
| Variable_name            | Value
     |
+--------------------------+----------------------------------------------------
-----+
| character_set_client     | gbk
     |
| character_set_connection | gbk
     |
| character_set_database   | utf8
     |
| character_set_filesystem | binary
     |
| character_set_results    | gbk
     |
| character_set_server     | utf8
     |
| character_set_system     | utf8
     |
| character_sets_dir       | c:\Program Files\MySQL\MySQL Server 5.0\share\chars
ets\ |
+--------------------------+----------------------------------------------------
-----+
8 rows in set (0.00 sec)
   查看表的编码  >show create table person;

5、在jsp页面要如下配置

    <%@ page language="java" import="java.util.*" pageEncoding="gb2312"%>

    <meta http-equiv="Content-Type" content="text/html charset=gb2312">

6、在连接mysql类里要如下设置

  String driverName = "com.mysql.jdbc.Driver";//"org.gjt.mm.mysql.Driver"两个驱动都可以用
  String dbHost = host;//数据库的一些信息
  String dbPort = port;
  String dbName = dbaName;
  String enCoding = "?useUnicode=true&characterEncoding=gb2312"; //解决MySql中文问题,要连续写不能空格
  String userName = usName;
  String Psw = psw;
  String url = "jdbc:mysql://" + dbHost + ":" + dbPort + "/" + dbName+enCoding;
  try
  {
   Class.forName(driverName).newInstance();
   dbconn = DriverManager.getConnection(url, userName, Psw);
   //getConnection(url, userName, Psw)从给的driver中选择合适的去连接数据库
   //return a connection to the URL
  }catch(Exception e){
   print("url = " + url); //发生错误时，将连接数据库信息打印出来
   print("userName = " + userName);
   print("Psw = " + Psw);
   print("Exception: " + e.getMessage());//得到出错信息
  }
  if (dbconn != null)//dbconn != null 表示连接数据库成功，由异常保证！？
   return true;
  else
   return false;