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/javaeehttp://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