Struts小项目二

一 需求

利用过滤器解决中文乱码问题

 

二 实现方法

开发一个过滤器，并设置 setCharacterEncoding("utf-8")

 

三 实现代码

1  Myfilter1

package com.cakin.filters;

import java.io.IOException;

import java.io.PrintWriter;

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.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

public class Myfilter1 extends HttpServlet implements Filter {

    public void doFilter(ServletRequest arg0, ServletResponse arg1,

            FilterChain arg2) throws IOException, ServletException {

        arg0.setCharacterEncoding("utf-8");

        arg2.doFilter(arg0, arg1);

        

    }

    public void init(FilterConfig arg0) throws ServletException {

        // TODO Auto-generated method stub

        

    }

}

 

2  web.xml重新配置过滤器

<? xml version = "1.0" encoding = "UTF-8" ?>

< web-app xmlns = " http://java.sun.com/xml/ns/javaee" ; xmlns:xsi = " http://www.w3.org/2001/XMLSchema-instance" ; version = "2.5" xsi:schemaLocation = " http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" ; >

  < display-name />

  < servlet >

    < servlet-name > action </ servlet-name >

    < servlet-class > org.apache.struts.action.ActionServlet </ servlet-class >

    <!-- 配置struts-config.xml -->

    < init-param >

      < param-name > config </ param-name >

      < param-value > /WEB-INF/struts-config.xml </ param-value >

    </ init-param >

    < init-param >

      < param-name > debug </ param-name >

      < param-value > 3 </ param-value >

    </ init-param >

    < init-param >

      < param-name > detail </ param-name >

      < param-value > 3 </ param-value >

    </ init-param >

    < load-on-startup > 0 </ load-on-startup >

  </ servlet >

  < filter >

         < filter-name > Myfilter1 </ filter-name >

         < filter-class > com.cakin.filters.Myfilter1 </ filter-class >

  </ filter >

  < filter-mapping >

         < filter-name > Myfilter1 </ filter-name >

         < url-pattern > /* </ url-pattern >

  </ filter-mapping >

  < servlet-mapping >

    < servlet-name > action </ servlet-name >

    < url-pattern > *.do </ url-pattern >

  </ servlet-mapping >

 

  < welcome-file-list >

    < welcome-file > index.jsp </ welcome-file >

  </ welcome-file-list >

</ web-app >

 

四 测试