jsp+tomcat(或resin)+redhat7.3乱码问题(100分)

进入数据库和提取时都出现乱码。web.xml已经配置，在windows下无此问题。求救！
web.xml配置如下：
<filter>
<filter-name>Character Encoding</filter-name>
<filter-class>com.intacpurun.util.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>GB2312</param-value>
</init-param>
<init-param>
<param-name>ignore</param-name>
<param-value>true</param-value>
</init-param>
</filter>

<filter-mapping>
<filter-name>Character Encoding</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

数据库是mysql