hibernate正常mysql乱码_Hibernate MySQL 中文乱码问题

在网上看过很多解决mysql乱码的帖子，可是写的不是罗里罗嗦就过于复杂。其实乱码没那么复杂，是网上的大侠们想多了。我研究过一段日子，总结出一套自己的解决方案，如果你还没解决乱码就用我的方法试一下。我的方案不是最好的，却是最简单易懂的。不信你试试。

在使用MYSQL时，插入中文字符，经常会出现乱码，中文全被用?代替。出现这种情况的原因，多是字符集不匹配造成的。

在MYSQL中，如果使用缺省的字符集，在建库、建表时，默认使用的是latin1字符集，为ISO 8859-1西欧字符集。插入中文字符时，与之不匹配，就会出现乱码。

要解决此问题，就必须手动将数据库Server和Client的字符编码改为gb2312。配置方法如下：

打开MYSQL安装目录下的my.ini文件，找到如下段落：

# CLIENT SECTION

# ----------------------------------------------------------------------

#

# The following options will be read by MySQL client applications.

# Note that only client applications shipped by MySQL are guaranteed

# to read this section. If you want your own MySQL client program to

# honor these values, you need to specify it as an option during the

# MySQL client library initialization.

#

[client]

port=3306

[mysql]

default-character-set=latin1

# SERVER SECTION

# ----------------------------------------------------------------------

#

# The following options will be read by the MySQL Server. Make sure that

# you have installed the server correctly (see above) so it reads this

# file.

#

[mysqld]

# The TCP/IP Port the MySQL Server will listen on

port=3306

#Path to installation directory. All paths are usually resolved relative to this.

basedir="D:/MySQL/MySQL Server 5.0/"

#Path to the database root

datadir="D:/MySQL/MySQL Server 5.0/Data/"

# The default character set that will be used when a new schema or table is

# created and no character set is defined

default-character-set=latin1

将其中的default-character-set=latin1

改为default-character-set=gb2312( 两个都改)

,然后重启MYSQL(特别注意：以前建立的数据库要重建，因为以前存储的数据编码方式为ISO-8859-1),运行MySQL Command Line Client：

输入show variables like 'character_set_%';可以查看数据库的字符编码如下：

mysql> show variables like 'character_set_%';

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

| Variable_name             | Value                                     |

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

| character_set_client      | gb2312                                   |

| character_set_connection | gb2312                                |

| character_set_database    | gb2312                                |

| character_set_filesystem | binary                                   |

| character_set_results     | gb2312                                   |

| character_set_server      | gb2312                                  |

| character_set_system      | utf8                                     |

| character_sets_dir        | D:\MySQL\MySQL Server 5.0\share\charsets|

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

然后，在程序中将连接数据库的URL改为jdbc:mysql://localhost:3306/databasename?useUnicode=true&

characterEncoding=gb2312   就可以了！(&amp；是代表xml中的&)

还需要注意到是：1.你的JSP页面一定别忘了加上编码方式。

2.把以前写过滤方法如:getbytes(iso-8859-1)全去掉