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Mysql中文问题的解决案例演示

Jun 07, 2016 pm 04:09 PM
mysql Chinese main article Case Demo solve

以下的文章主要介绍的是Mysql中文问题的实际解决方法,其中主要包括MySql字符集的问题解决,ROR+Mysql5 utf8中正确搭配相关问题的实际解决方案,以下就是文章的具体内容的主要描述,望你浏览之后会有所收获。 『出错』Hibernate对象关系在MySQL4.1中无法正确

以下的文章主要介绍的是Mysql中文问题的实际解决方法,其中主要包括MySql字符集的问题解决,ROR+Mysql5 utf8中正确搭配相关问题的实际解决方案,以下就是文章的具体内容的主要描述,望你浏览之后会有所收获。

『出错』Hibernate对象关系在MySQL4.1中无法正确执行?

推荐圈子: JBoss SEAM

更多相关推荐 阅读过不少关于mysql的编码设置和乱码问题的一些文章,经过再三的调试,终于通过,终于解决了一块心病,终于解了我心头之恨,哈哈哈。现在把它概括如下。

MySQL 4.1的字符集支持(Character Set Support)有两个方面:字符集(Character set)和排序方式(Collation)。对于字符集的支持细化到四个层次: 服务器(server),数据库(database),数据表(table)和连接(connection)。我们最终的目标是使得这四个层次转化会支持Mysql中文的编码,下面以utf8为例。

1. 首先查看系统的字符集和排序方式。如果想查看某个特定的数据库的字符集和排序方式,应该先选定数据库,mysql>use databasename;

<ol class="dp-xml">
<li class="alt"><span><span>mysql</span><span class="tag">></span><span> SHOW VARIABLES LIKE ''character_set_%'';   </span></span></li>
<li><span>+--------------------------+----------------------------+   </span></li>
<li class="alt"><span>| Variable_name | Value |   </span></li>
<li><span>+--------------------------+----------------------------+   </span></li>
<li class="alt"><span>| character_set_client | latin1 |   </span></li>
<li><span>| character_set_connection | latin1 |   </span></li>
<li class="alt"><span>| character_set_database | latin1 |   </span></li>
<li><span>| character_set_results | latin1 |   </span></li>
<li class="alt"><span>| character_set_server | latin1 |   </span></li>
<li><span>| character_set_system | utf8 |   </span></li>
<li class="alt"><span>| character_sets_dir | /usr/share/mysql/charsets/ |   </span></li>
<li><span>+--------------------------+----------------------------+   </span></li>
<li class="alt"><span>7 rows in set (0.00 sec)   </span></li>
<li>
<span>mysql</span><span class="tag">></span><span> SHOW VARIABLES LIKE ''collation_%'';   </span>
</li>
<li class="alt"><span>+----------------------+-------------------+   </span></li>
<li><span>| Variable_name | Value |   </span></li>
<li class="alt"><span>+----------------------+-------------------+   </span></li>
<li><span>| collation_connection | latin1_swedish_ci |   </span></li>
<li class="alt"><span>| collation_database | latin1_swedish_ci |   </span></li>
<li><span>| collation_server | latin1_swedish_ci |   </span></li>
<li class="alt"><span>+----------------------+-------------------+   </span></li>
<li><span>3 rows in set (0.00 sec)  </span></li>
</ol>
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上面列出的值就是系统的默认值,lanti是不支持Mysql中文的,所以我们把它改成urf8。

下面我们就来修改这四个层次的编码方式:

1 在my.cf文件的[mysqld]段设置:

<ol class="dp-xml"><li class="alt"><span><span class="attribute">default-character-set</span><span>=</span><span class="attribute-value">utf8</span><span>  </span></span></li></ol>
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这条语句的作用是把character_set_client, character_set_connection_,character_set_results 设定为utf8,包括对应的排列方式的编码。
Character_set_server是系统编码,这个是不用改的。

当然改变character_set_client, character_set_connection_,character_set_results编码方式的另外一种方法是:

<ol class="dp-xml"><li class="alt"><span><span>SET NAMES “UTF8”;  </span></span></li></ol>
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它的作用相当于:

<ol class="dp-xml">
<li class="alt"><span><span>SET </span><span class="attribute">character_set_client</span><span> = </span><span class="attribute-value">utf8</span><span>;   </span></span></li>
<li>
<span>SET </span><span class="attribute">character_set_results</span><span> = </span><span class="attribute-value">utf8</span><span>;   </span>
</li>
<li class="alt">
<span>SET </span><span class="attribute">character_set_connection</span><span> = </span><span class="attribute-value">utf8</span><span>;  </span>
</li>
</ol>
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2. 改变数据库的编码方式

<ol class="dp-xml"><li class="alt"><span><span>alter database databasename character set utf8;  </span></span></li></ol>
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通过以上的更改数据库的编码工作算是昨晚了,当然除了这个方法还有一个万能个的方法,那就是看着那个不是utf8,你只要把相应的编码改成utf8就可以了。格式如下:SET

<ol class="dp-xml"><li class="alt"><span><span class="attribute">character_set_client</span><span> = </span><span class="attribute-value">utf8</span><span>;  </span></span></li></ol>
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3. 不管你是web编程还是桌面编程,你的数据库的连接地址url中,一定要后缀:

<ol class="dp-xml"><li class="alt"><span><span>?</span><span class="attribute">useUnicode</span><span>=</span><span class="attribute-value">true</span><span>&</span><span class="attribute">characterEncoding</span><span>=</span><span class="attribute-value">utf</span><span>-8/hibernate?</span><span class="attribute">useUnicode</span><span>=</span><span class="attribute-value">true</span><span>&</span><span class="attribute">characterEncoding</span><span>=</span><span class="attribute-value">utf</span><span>-8  </span></span></li></ol>
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当然如果你采用了mysql的管理工具如mysql yog,mysql manager那么你数据库设定也可以在可视化环境下直接设置。当然这也只是限制在database的设定。

以上的相关内容就是对Mysql中文问题解决方案的介绍,望你能有所收获。

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