`

Hibernate MySQL 中文乱码问题

阅读更多

Hibernate MySQL 中文乱码问题

<script type="text/javascript"> document.body.oncopy = function () { if (window.clipboardData) { setTimeout(function () { var text = clipboardData.getData(&quot;text&quot;); if (text &amp;&amp; text.length &gt; 300) { text = text + &quot;\r\n\n本文来自CSDN博客,转载请标明出处:&quot; + location.href; clipboardData.setData(&quot;text&quot;, text); } }, 100); } } </script><script type="text/javascript"> function StorePage() { d = document; t = d.selection ? (d.selection.type != 'None' ? d.selection.createRange().text : '') : (d.getSelection ? d.getSelection() : ''); void (keyit = window.open('http://www.365key.com/storeit.aspx?t=' + escape(d.title) + '&amp;u=' + escape(d.location.href) + '&amp;c=' + escape(t), 'keyit', 'scrollbars=no,width=475,height=575,left=75,top=20,status=no,resizable=yes')); keyit.focus(); }</script>

环境 :Hibernate 2.1.7 + MySQL4.1(MySQL的编码已设置为utf8)
问题 :通过Hibernate向MySQL写入中文后,通过Hibernate取回数据,在console中打印java对象显示正常。但在MySQL Query Browser中看到的是乱码,传给前端的Flex也是乱码。
原因 :Hibernate的基础还是JDBC,所以一样需要设置characterEncoding!
解决方法
在hibernate.cfg.xml中应该这样写

< property  name ="connection.url" > jdbc:mysql://localhost:3306/test?useUnicode=true &amp; characterEncoding=UTF-8 </ property >
如果用hibernate.properties
#hibernate.connection.url jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8

ps:处理中文的话,characterEncoding用GBK一样可以。
但字节编码问题最好的解决方法还是统一使用UTF-8!!!
posted on 2005-06-10 21:35 板桥居 阅读(140) 评论(0)  编辑  收藏


另外一个blog还有详细的三种解决方法:http://www.cnblogs.com/josson/

1, mysql安装时设置字符集utf-8, jdbc驱动3.0.15以上.
2. hibernate配置文件中,加上属性
<property name="connection.useUnicode">true</property>
<property name="connection.characterEncoding">UTF-8</property>

3. web.xml设置Filter
=================================================
< filter >
  
< filter-name >
   Set Web Application Character Encoding
  
</ filter-name >
  
< filter-class > cn.com.commnet.util.SetEncodeFilter </ filter-class >
  
< init-param >
   
< param-name > defaultencoding </ param-name >
   
< param-value > UTF-8 </ param-value >
  
</ init-param >
 
</ filter >
 
< filter-mapping >
  
< filter-name >
   Set Web Application Character Encoding
  
</ filter-name >
  
< url-pattern > /* </ url-pattern >
 
</ filter-mapping >

=============================================
SetEncodeFilter.java
public   class  SetEncodeFilter implements Filter  {

    
protected  FilterConfig filterConfig  =   null ;

    
protected  String defaultEncoding  =   null ;

    
/**/ /*  (non-Javadoc)
     * @see javax.servlet.Filter#init(javax.servlet.FilterConfig)
     
*/

    
public   void  init(FilterConfig arg0) throws ServletException  {
        
//  TODO Auto-generated method stub
         this .filterConfig  =  arg0;
        
this .defaultEncoding  =  filterConfig.getInitParameter( " defaultencoding " );
    }


    
/**/ /*  (non-Javadoc)
     * @see javax.servlet.Filter#doFilter(javax.servlet.ServletRequest, javax.servlet.ServletResponse, javax.servlet.FilterChain)
     
*/

    
public   void  doFilter(
        ServletRequest request,
        ServletResponse response,
        FilterChain chain)
        throws IOException, ServletException 
{
        
//  TODO Auto-generated method stub
        request.setCharacterEncoding(selectEncoding(request));
        chain.doFilter(request, response);
    }



    
public   void  destroy()  {
        
        
this .defaultEncoding  =   null ;
        
this .filterConfig  =   null ;
    }



    
protected  String selectEncoding(ServletRequest request)  {

        
return   this .defaultEncoding;
    }


}


==================================
环境 :Hibernate 3.2 + MySQL5.0(MySQL的编码已设置为utf8)
问题 :通过Hibernate向MySQL写入中文后,通过Hibernate取回数据,在console中打印java对象显示正常。但在MySQL Query Browser中看到的是乱码,传给前端的Flex也是乱码。
原因 :Hibernate的基础还是JDBC,所以一样需要设置characterEncoding!
解决方法
在hibernate.cfg.xml中应该这样写
< property name ="connection.url" > jdbc:mysql://localhost:3306/test?useUnicode=true &amp; characterEncoding=UTF-8 </ property >

如果用hibernate.properties
#hibernate.connection.url jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8

ps:处理中文的话,characterEncoding用GBK一样可以。
但字节编码问题最好的解决方法还是统一使用UTF-8!!!

========================================

mysql utf-8 乱码解决

数据库 2009-09-15 12:34:33 阅读312 评论0 字号:

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&amp; 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<%@ page pageEncoding="GB2312"%>。

2.把以前写过滤方法如:getbytes(iso-8859-1)全去掉

分享到:
评论

相关推荐

Global site tag (gtag.js) - Google Analytics