关于web.xml设置filter的问题，相同web.xml和过滤类,放在MyEclipse下有用，而放到Eclipse下就不起作用了，请教各位答疑。谢谢！

sergio_shi 2009-07-23 11:00:29

过滤类java代码如下：



package com.login.struts.filter;



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;



public class SetEncodingFilter implements Filter {

	 

	 // default character encoding

	 String defaultEncoding = "gbk"; 

	 

	 public void init(FilterConfig config) throws ServletException {

	  String encoding = config.getInitParameter("encoding");

	  if (encoding != null) {

	   defaultEncoding = encoding;

	  }

	 }



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

	  request.setCharacterEncoding(defaultEncoding);

	  chain.doFilter(request, response);

	 }



	 public void destroy() {

	  defaultEncoding = null;

	 }

}

web.xml配置如下：



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

<web-app id="WebApp_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

	<display-name>Login</display-name>

	

	

	

	

	<servlet>

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

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

		<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>2</param-value>

		</init-param>

		<init-param>

			<param-name>validate</param-name>

			<param-value>true</param-value>

		</init-param>

		<load-on-startup>2</load-on-startup>

	</servlet>

	

	<servlet-mapping>

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

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

	</servlet-mapping>

	

	<jsp-config>

		<taglib>

			<taglib-uri>/WEB-INF/struts-html.tld</taglib-uri>

			<taglib-location>/WEB-INF/struts-html.tld</taglib-location>

		</taglib>

		<taglib>

			<taglib-uri>/WEB-INF/struts-bean.tld</taglib-uri>

			<taglib-location>/WEB-INF/struts-bean.tld</taglib-location>

		</taglib>

		<taglib>

			<taglib-uri>/WEB-INF/struts-logic.tld</taglib-uri>

			<taglib-location>/WEB-INF/struts-logic.tld</taglib-location>

		</taglib>

	</jsp-config>

	

	<filter>

  <filter-name>SetCharacterEncoding</filter-name>

  <filter-class>com.login.struts.filter.SetEncodingFilter</filter-class>

  <init-param>

   <param-name>encoding</param-name>

   <param-value>gbk</param-value>

  </init-param>

 </filter>

 

 <filter-mapping>

  <filter-name>SetCharacterEncoding</filter-name>

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

 </filter-mapping>  

	

	

	<welcome-file-list>

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

	</welcome-file-list>

</web-app>