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

package 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 javax.servlet.UnavailableException; /** * Example filter that sets the character encoding to be used in parsing the * incoming request */ public class SetCharacterEncodingFilter implements Filter { /** * Take this filter out of service. */ public void destroy() { } /** * Select and set (if specified) the character encoding to be used to * interpret request parameters for this request. */ public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)throws IOException, ServletException { request.setCharacterEncoding("gbk"); // 传递控制到下一个过滤器 chain.doFilter(request, response); } public void init(FilterConfig filterConfig) throws ServletException { } }

 

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

<?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"> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <filter> <filter-name>Set Character Encoding</filter-name> <filter-class>util.SetCharacterEncodingFilter</filter-class> </filter> <filter-mapping> <filter-name>Set Character Encoding</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <filter> <filter-name>struts-cleanup</filter-name> <filter-class>org.apache.struts2.dispatcher.ActionContextCleanUp</filter-class> </filter> <filter-mapping> <filter-name>struts-cleanup</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <filter> <filter-name>struts2</filter-name> <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class> </filter> <filter-mapping> <filter-name>struts2</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> </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

<struts> <constant name="struts.i18n.encoding" value="gbk"></constant> ... ... ... </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>