mysql中文乱码问题

1. 查看默认的编码格式:

    mysql>show variables like "%char%";  
        | 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 |  
    mysql>set names utf8;
        作用:SET character_set_client='utf8';  
             SET character_set_connection='utf8';  
             SET character_set_results='utf8';  

2. 查看数据库的编码格式:

    mysql>show create database test;

3. 修改数据库编码格式:

    mysql>ALTER DATABASE test DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;  

4. 查看创建表语句及其编码格式:

mysql>show create table student;   

5. 修改表的编码格式:

mysql>ALTER TABLE admin DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;

CLIENT SECTION
        [mysql]
        default-character-set=utf8(作用跟set names utf8;一样,都是将client,connection,results字符集由Latin1转为utf8,不同的是set names utf8;仅仅对当前操作有效,重启mysql服务器恢复默认字符集Latin1)
    
    为避免乱码,建库建表时设置字符集为utf8:
        建库:
            CREATE DATABASE `test` CHARACTER SET 'utf8' COLLATE 'utf8_general_ci';
        建表:
            CREATE TABLE `database_user` () ENGINE=InnoDB DEFAULT CHARSET=utf8;

    mysql>\s    mysql>status  都可以显示数据库字符集信息
    set character_set_connection = 'utf8';改变编码集

    注:*****创建数据库,表均已设置编码集为utf8时,如果还不能在cmd窗口写入中文,则检查一下cmd默认编码集,若为gbk,则应:mysql>set names gbk;此时写入的中文数据可以被cmd正确解释