struts2 中文乱码的解决办法分享

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&characterencoding=gbk"></property>