web 项目从数据库读取数据时出现乱码的问题的解决

1.修改数据库的编码方式：

mysql> show variables like '%char%';

+--------------------------+--------------------------

| Variable_name | Value

+--------------------------+--------------------------

| character_set_client | utf8

| character_set_connection | utf8

| character_set_database | gbk

| character_set_filesystem | binary

| character_set_results | utf8

| character_set_server | utf8

| character_set_system | utf8

| character_sets_dir | D:\DB\Mysql\share\charset

+--------------------------+--------------------------

8 rows in set (0.01 sec)

mysql> set character_set_client=gbk;

Query OK, 0 rows affected (0.00 sec)

mysql> set character_set_connection=gbk;

Query OK, 0 rows affected (0.00 sec)

mysql> set character_set_results=gbk;

Query OK, 0 rows affected (0.00 sec)

mysql> set character_set_server=gbk;

Query OK, 0 rows affected (0.00 sec)

mysql> set character_set_system=gbk;

mysql> show variables like '%char%';

+--------------------------+-----------------------------+

| Variable_name | Value |

+--------------------------+-----------------------------+

| character_set_client | gbk |

| character_set_connection | gbk |

| character_set_database | gbk |

| character_set_filesystem | binary |

| character_set_results | gbk |

| character_set_server | gbk |

| character_set_system | utf8 |

| character_sets_dir | D:\DB\Mysql\share\charsets\ |

+--------------------------+-----------------------------+

8 rows in set (0.00 sec)

设置成utf-8对比设置成 gbk的不同：

主要还是在 dos-cmd的默认 是gbk的编码。。。



所以使用gbk这种编码是比较好处理数据，不容易出现乱码问题

。。。。。。。。。。。。。。。。

改为utf-8



mysql> show variables like '%char%';

+--------------------------+-----------------------------+

| Variable_name | Value |

+--------------------------+-----------------------------+

| character_set_client | utf8 |

| character_set_connection | utf8 |

| character_set_database | utf8 |

| character_set_filesystem | binary |

| character_set_results | utf8 |

| character_set_server | utf8 |

| character_set_system | utf8 |

| character_sets_dir | D:\DB\Mysql\share\charsets\ |

+--------------------------+-----------------------------+

8 rows in set (0.03 sec)

对于gbk 和 utf-8的编码不同 请查看：
http://www.cnblogs.com/xiaomia/archive/2010/11/28/1890072.html