struts2中form表单提交到action乱码

今天遇到一个乱码问题。jsp页面代码如下，页面编码为UTF-8：

 1 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
 2 <%@taglib uri="/struts-tags" prefix="s" %>
 3 <%
 4 String path = request.getContextPath();
 5 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
 6 %>
 7 
 8 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
 9 <html>
10   <head>
11     <base href="<%=basePath%>">
12     
13     <title>My JSP 'Category_input.jsp' starting page</title>
14     
15     <meta http-equiv="pragma" content="no-cache">
16     <meta http-equiv="cache-control" content="no-cache">
17     <meta http-equiv="expires" content="0">    
18     <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
19     <meta http-equiv="description" content="This is my page">
20     <!--
21     <link rel="stylesheet" type="text/css" href="styles.css">
22     -->
23 
24   </head>
25   
26   <body>
27   <form action="admin/Category-update" method="post">
28   <input type="hidden" name="category.id" value='<s:property value="category.id"/>'>
29       name:<input name="category.name" value='<s:property value="category.name"/>'/>
30       description:<textarea name="category.description"><s:property value="category.description"/></textarea>
31       <input type="submit" value="update" /> 
32   </form>
33   </body>
34 </html>

web.xml配置如下：

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
 3   <display-name>bbs2</display-name>
 4  <welcome-file-list>
 5     <welcome-file>index.jsp</welcome-file>
 6   </welcome-file-list>
 7   
 8   <filter>
 9         <filter-name>struts2</filter-name>
10         <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
11     </filter>
12 
13     <filter-mapping>
14         <filter-name>struts2</filter-name>
15         <url-pattern>/*</url-pattern>
16     </filter-mapping>
17   
18 </web-app>

struts.xml配置如下：

 1 <?xml version="1.0" encoding="UTF-8" ?>
 2 <!DOCTYPE struts PUBLIC
 3     "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
 4     "http://struts.apache.org/dtds/struts-2.0.dtd">
 5 
 6 <struts>
 7 
 8     <!-- form表单提交中文乱码 -->
 9     <constant name="struts.i18n.encoding" value="UTF-8" />
10     <!--<constant name="struts.enable.DynamicMethodInvocation" value="false" />-->
11     <constant name="struts.devMode" value="true" />
12     <!--<constant name="struts.ognl.allowStaticMethodAccess" value="true"></constant>-->
13     
14     <package name="front" namespace="/" extends="struts-default">
15         <!--  <default-action-ref name="Category-list"></default-action-ref>  不能与*-*一起用-->
16         <action name="Category-list" class="com.lch.bbs2009.action.CategoryAction">
17             <result>/admin/Category-list.jsp</result>
18         </action>
19     </package>
20     
21     <package name="admin" namespace="/admin" extends="struts-default">
22         
23         <action name="index">
24             <result>/admin/index.html</result>
25         </action>
26         
27         <action name="*-*" class="com.lch.bbs2009.action.{1}Action" method="{2}">
28             <result name="success">/admin/{1}-{2}.jsp</result>
29             <result name="input">/admin/{1}-{2}.jsp</result>
30         </action>
31 
32     </package>
33 
34 </struts>

action代码如下：

 1 package com.lch.bbs2009.action;
 2 
 3 import java.util.List;
 4 
 5 import com.lch.bbs2009.model.Category;
 6 import com.lch.bbs2009.service.CategoryService;
 7 import com.opensymphony.xwork2.ActionSupport;
 8 
 9 /**
10  * @author licheng
11  * 
12  */
13 public class CategoryAction extends ActionSupport {
14     /**
15      * 
16      */
17     private List<Category> categories;
18     private CategoryService categoryService = new CategoryService();
19     private Category category;
20     private int id;
21 
22     public String list() {
23         categories = categoryService.queryAll();
24         return SUCCESS;
25     }
26 
27     public String add() {
28         categoryService.add(category);
29         return SUCCESS;
30     }
31 
32     public String update() {
33         categoryService.update(category);
34         return SUCCESS;
35     }
36 
37     public String delete() {
38         categoryService.deleteById(id);
39         return SUCCESS;
40     }
41 
42     public String addInput() {
43         return INPUT;
44     }
45 
46     public String updateInput() {
47         this.category = this.categoryService.loadById(id);
48         return INPUT;
49     }
50     
51     public List<Category> getCategories() {
52         return categories;
53     }
54 
55     public void setCategories(List<Category> categories) {
56         this.categories = categories;
57     }
58 
59     public CategoryService getCategoryService() {
60         return categoryService;
61     }
62 
63     public void setCategoryService(CategoryService categoryService) {
64         this.categoryService = categoryService;
65     }
66 
67     public Category getCategory() {
68         return category;
69     }
70 
71     public void setCategory(Category category) {
72         this.category = category;
73     }
74 
75     public int getId() {
76         return id;
77     }
78 
79     public void setId(int id) {
80         this.id = id;
81     }
82 
83 }

通过debug模式调试，发现action中接收到的值就是乱码的。

在网上找解决办法

1.检查页面编码，服务器编码，数据库编码是否一致。我的均为UTF-8;

2.在你配置文件的前面写上<constant name="struts.i18n.encoding" value="UTF-8" />。我写了，无效；

3.在struts.properties中添加

struts.locale=zh_CN
struts.i18n.encoding=UTF-8 以此设定locale、encoding字符集。

补充：struts.properties是可以不要的！！struts2的默认配置文件为default.properties,位于struts2-core-2.x.x.jar的org.apache.struts2包下面。如果一个项目中一个属性同时都在两个文件中配置了，它有一个加载顺序：先加载struts.xml，再加载struts.properties。也就是说struts.properties可以覆盖struts.xml里面的配置。具体是否要用struts.properties得视具体情况而定。

我添加了此文件并修改了，结果无效。

4.在web.xml中加入

 1 <!-- zh-cn encoding -->
 2     <filter>
 3         <filter-name>struts-cleanup</filter-name>
 4         <filter-class>
 5             org.apache.struts2.dispatcher.ActionContextCleanUp
 6         </filter-class>
 7     </filter>
 8     <filter-mapping>
 9         <filter-name>struts-cleanup</filter-name>
10         <url-pattern>/*</url-pattern>
11     </filter-mapping>

补充：web.xml中Encodingfilter的位置应该在Struts2的FilterDispatcher之前，因为要先调整字符集，然后进入Action.按照Struts2的API,filter的顺序是：

struts-cleanup filter
SiteMesh filter
FilterDispatcher

结果无效

5.表单提交都是通过servlet调post()或get()方法处理的，再把结果返回到客户端。写个过滤类，表单提交都先到servlet请求，如果在请求前加个过滤器，将字符都转为中文再进行处理

public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {

HttpServletRequest request_1 = (HttpServletRequest) request;
HttpServletResponse response_1 = (HttpServletResponse) response;

// 转换编码，并且加上去缓存
request_1.setCharacterEncoding("GBK");
response_1.setCharacterEncoding("GBK");
chain.doFilter(request, response);

}我像这样建一个servlet之后，上面都是红叉叉！！

谁能教教我怎么解决，谢了！！

我坑爹的搞了一下午，最后问题解决了版本问题！！！！！

问题解决了，struts版本问题
Struts2.1.8版本之前有个Bug ，中文乱码。貌似搞成GBK可以，不想纠结了，直接换jar包吧！！记得马士兵老师之前讲过的，可惜我忘了。虽然弄了一下午，但还是学到了不少。呼，在此感谢小锋老师远程帮我解决了问题！！！！！