还是乱码问题，折磨几天了，跪拜求指导，磕头了！

Question

全局的过滤器：
<filter>
 <filter-name>EncodingFilter</filter-name>
<filter-class>com.mmis.publicClass.EncodingFilter</filter-class>
        <init-param>
           <param-name>encoding</param-name>
           <param-value>GB18030</param-value>
        </init-param>
 </filter>
     <filter-mapping>
         <filter-name>EncodingFilter</filter-name>
         <url-pattern>/*</url-pattern>
     </filter-mapping>
JSP默认设置了为GB18030:
<% page language=”java” import=”java.util.*” pageEncoding=”GB18030>
数据库创建的编码为GBK：my.ini中为：default-character-set=gbk
Action中的为：<constant name="struts.locale" value="zh_CN"></constant>
<constant name="struts.i18n.encoding" value="GB18030"></constant>
Tomcat 中server.xml文件中URLEncoding为：GBK
我尝试在控制台中往数据库输入中文，没错，在JSP中取得时候显示的也没错，就是在JSP表单中输入中文然后保存的时候，进入数据库就变成乱码了。上面能牵扯到编码的地方都列出来了。

Answer 1

是过滤器的没有生效的原因吗？刚开始用的是spring自带的那个，没用，后来自己写了个，是不是根本就没有过滤到action的请求

Answer 2

<?xml version="1.0" encoding="utf-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
</filter> <filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern> </filter-mapping> <listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener> <context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<!--  
<filter>
<filter-name>CharacterEncodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>GB18030</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>CharacterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
-->
 <filter> 
     <filter-name>EncodingFilter</filter-name>
     <filter-class>com.mmis.publicClass.EncodingFilter</filter-class> 
     <init-param> 
       <param-name>encoding</param-name> 
        <param-value>GB18030</param-value> 
      </init-param>
      </filter>
      
       <filter-mapping>
            <filter-name>EncodingFilter</filter-name> 
    <url-pattern>/*</url-pattern> 
</filter-mapping>

</web-app>

Answer 3

<?xml version="1.0" encoding="utf-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
</filter> <filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern> </filter-mapping> <listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener> <context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<!--  
<filter>
<filter-name>CharacterEncodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>GB18030</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>CharacterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
-->
 <filter> 
     <filter-name>EncodingFilter</filter-name>
     <filter-class>com.mmis.publicClass.EncodingFilter</filter-class> 
     <init-param> 
       <param-name>encoding</param-name> 
        <param-value>GB18030</param-value> 
      </init-param>
      </filter>
      
       <filter-mapping>
            <filter-name>EncodingFilter</filter-name> 
    <url-pattern>/*</url-pattern> 
</filter-mapping>

</web-app>

把编码过滤器 放到最上面

Answer 4

以下是个人关于乱码的一个总结,可以从下面的4个方面检查一下：struts2 Filter:
package com.zndt.znfw.util;import java.io.IOException;import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter;
/* 继承struts的核心过滤器 */
public class CharacterEncodingFilter extends StrutsPrepareAndExecuteFilter{
public void doFilter(ServletRequest arg0, ServletResponse arg1,
FilterChain arg2) throws IOException, ServletException {
arg0.setCharacterEncoding("UTF-8");/* 1 */
arg1.setCharacterEncoding("UTF-8");/* 2 */
super.doFilter(arg0, arg1,arg2);
}
}web.xml
<filter>
<filter-name>struts2</filter-name>     <filter-class>com.zndt.znfw.util.CharacterEncodingFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>/*</url-pattern>
</filter-mapping>
tomcat 
URI问题:
<Connector port="8080" 
maxThreads="150" minSpareThreads="25" maxSpareThreads="75" 
enableLookups="false" redirectPort="8443" acceptCount="100" 
debug="0" connectionTimeout="20000" useBodyEncodingForURI="true" 
disableUploadTimeout="true" URIEncoding=”UTF-8”/>取：
里面所设置的URIEncoding=”UTF-8”再进行一次编码，但是由于已经编码为utf-8，再编码也不会有变化了。（指的是后台代码request.setCharcterEncoding(“utf-8”)）
拿：
如果是从url获取编码，接受页面则是根据URIEncoding=”UTF-8”来进行解码的。（指的是浏览器拿到页面之后按照utf-8来解码）jsp:
<%@ page language="java" pageEncoding="UTF-8"%>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">数据库端的编码方式：
也设置为UTF-8
example:
mysq url 驱动:
jdbc:mysql://localhost/WEBCLDB?useUnicode=true&characterEncoding= UTF-8。

Answer 5

在项目中。在html的属性总设置编码格式。

Answer 6

1： 页面应该有两处需要修改编码；
2： web.xml文件的过虑器是否正确， 并且要放在文件内容的前面；
3： 在action接收是在转下编码， iso-8859-1;注： 各处编码要统一；因为数据在java中就出错了， 所以数据库暂时不需要检查。 只要存之前没有乱码的话， 再者数据库的编码是统一的话就不会出错了。

Answer 7

我也是无语了。不明白为什么要用那么多种编码。一个项目统一一种编码，这是最好避免乱码的方法。还有，你要过滤action的编码，那你的filter要放在struts的过滤器上面，要不你自己的过滤器执行不了。建议还是把编码统一试试，过滤器位置换换。

Answer 8

数据库安装的时候没选utf-8，就选了GBK,MyEclipse中JSP选编码的时候为了能通数据库同步就选了GB18030(与GBK是兼容的)MyEclipse好像没有GBK