struts2 中文乱码解决办法

 适合情况 -> 从jsp传入到action时的乱码情况,这里以GBK为例

 

1.建立一个用于转换编码的filter

文件位置举例:src.util.SetCharacterEncodingFilter.java

[java]  view plain copy

1. package util;  
2.   
3. import java.io.IOException;  
4. import javax.servlet.Filter;  
5. import javax.servlet.FilterChain;  
6. import javax.servlet.FilterConfig;  
7. import javax.servlet.ServletException;  
8. import javax.servlet.ServletRequest;  
9. import javax.servlet.ServletResponse;  
10. import javax.servlet.UnavailableException;  
11.   
12. /** 
13.  * Example filter that sets the character encoding to be used in parsing the 
14.  * incoming request 
15.  */  
16. public class SetCharacterEncodingFilter implements Filter {  
17.   
18.     /** 
19.      * Take this filter out of service. 
20.      */  
21.     public void destroy() {  
22.     }  
23.     /** 
24.      * Select and set (if specified) the character encoding to be used to 
25.      * interpret request parameters for this request. 
26.      */  
27.     public void doFilter(ServletRequest request, ServletResponse response,  
28.     FilterChain chain)throws IOException, ServletException {  
29.   
30.     request.setCharacterEncoding("gbk");  
31.   
32.     // 传递控制到下一个过滤器  
33.     chain.doFilter(request, response);  
34.     }  
35.   
36.     public void init(FilterConfig filterConfig) throws ServletException {  
37.     }  
38. }  

 

2.修改web.xml,在struts的FilterDispatcher映射之前添加2个filter

[xhtml]  view plain copy

1. <?xml version="1.0" encoding="UTF-8"?>  
2. <web-app version="2.5"   
3.     xmlns="http://java.sun.com/xml/ns/javaee"   
4.     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"   
5.     xsi:schemaLocation="http://java.sun.com/xml/ns/javaee   
6.     http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">  
7.     <listener>  
8.         <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>  
9.     </listener>  
10.     <filter>  
11.         <filter-name>Set Character Encoding</filter-name>   
12.         <filter-class>util.SetCharacterEncodingFilter</filter-class>   
13.     </filter>   
14.     <filter-mapping>   
15.         <filter-name>Set Character Encoding</filter-name>  
16.         <url-pattern>/*</url-pattern>   
17.     </filter-mapping>  
18.       
19.     <filter>   
20.         <filter-name>struts-cleanup</filter-name>   
21.         <filter-class>org.apache.struts2.dispatcher.ActionContextCleanUp</filter-class>   
22.     </filter>  
23.     <filter-mapping>  
24.         <filter-name>struts-cleanup</filter-name>  
25.         <url-pattern>/*</url-pattern>  
26.     </filter-mapping>  
27.       
28.       
29.       
30.       
31.     <filter>  
32.         <filter-name>struts2</filter-name>  
33.         <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>  
34.     </filter>  
35.     <filter-mapping>  
36.         <filter-name>struts2</filter-name>  
37.         <url-pattern>/*</url-pattern>  
38.     </filter-mapping>  
39. </web-app>  

 

3.你的JSP头应该有

<%@ page language="java" pageEncoding="GBK"%>

 

4.在struts.xml中修改默认的编码设定

[xhtml]  view plain copy

1. <struts>  
2.     <constant name="struts.i18n.encoding" value="gbk"></constant>  
3.   
4. ...  
5. ...  
6. ...  
7.   
8. </struts>  

 

基本上就这样可以解决大多传入的字符乱码问题

 

PS:如果是数据库提取字符乱码,比如mysql,确认你的数据库内字符是gbk,并且连接字符串指定了字符编码

<property name="url" value="jdbc:mysql://localhost/database?useUnicode=true&amp;characterEncoding=gbk"></property>