编码过滤器不起作用

[weiyongzhi2005]

各位，在struts框架里面，我写了个过滤器类，然后在web.xml文件中进行了配置，但是测试时，由页面跳到action处理时，action中拿到的参数值还是乱码，不能起作用

filter类

package com.isoftstone.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;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class EncodingFilter implements Filter {
	
	String encoding = null ;
	public void destroy() {
		// TODO Auto-generated method stub

	}

	public void doFilter(ServletRequest arg0, ServletResponse arg1,
			FilterChain arg2) throws IOException, ServletException {
		HttpServletRequest request = (HttpServletRequest)arg0;
		HttpServletResponse response = (HttpServletResponse)arg1;
		request.setCharacterEncoding(encoding);
	}

	public void init(FilterConfig arg0) throws ServletException {
		// TODO Auto-generated method stub
		encoding = arg0.getInitParameter("encoding");
	}

}

web.xml文件

<?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">

   <filter>
	  <filter-name>EncodingFilter</filter-name>
	  <filter-class>com.isoftstone.struts.filter.EncodingFilter</filter-class>
	 <init-param>
	  	<param-name>encoding</param-name>
	 	 <param-value>utf-8</param-value>
	  </init-param>
   </filter>
	
	
	<filter-mapping>
	  <filter-name>EncodingFilter</filter-name>
	  <url-pattern>/GovPro/*</url-pattern>
	</filter-mapping>


  <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>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>
  <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>

[sangshusen_1988]

楼主是通过超连直接进来的还是通过form的post请求过来？
如果是超连过来的，可以试下这样看看
tomcat目录下conf/server.xml中
<Connector port="8080" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8443" useBodyEncodingForURI="true"/>

[yukang_ky]

问一下你，你发出请求时，有到运行EncodingFilter的代码吗，如果没有，那么将该页面放到入GovPro文件夹下，应该你在web.xml配置时只指定了对GovPro下的文件过滤。

[yukang_ky]

如果你要对所有的请求都要编码的话，就要更改web.xml文件，如下

<filter-mapping>
      <filter-name>EncodingFilter</filter-name>
      <url-pattern>/*</url-pattern>
    </filter-mapping>

[bingsha1976]

HttpServletRequest request = (HttpServletRequest)arg0;
HttpServletResponse response = (HttpServletResponse)arg1;
request.setCharacterEncoding(encoding);



request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8");
chain.doFilter(request,response);

[sahala3293]

public void doFilter(ServletRequest arg0, ServletResponse arg1,
FilterChain arg2) throws IOException, ServletException {
HttpServletRequest request = (HttpServletRequest)arg0;
HttpServletResponse response = (HttpServletResponse)arg1;
request.setCharacterEncoding(encoding);
}

你这样能执行到action中的话，应该是没有执行到这个filter，
因为你少写了一行arg2.doFilter(request,response);如楼上.
还有你的这个过滤器，只能过滤post请求情况下的 ，以下这种post和get都没问题

package cn.com.yd.gamecard.filter;
import java.io.IOException;
import java.io.UnsupportedEncodingException;

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.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import javax.servlet.http.HttpServletResponse;

/**
 * 字符编码过滤器
 * @author 
 *
 */
public class EncodeFilter implements Filter {

private  String encode = "gb2312";
	
	public void destroy() {
		

	}

	public void doFilter(ServletRequest arg0, ServletResponse arg1,
			FilterChain arg2) throws IOException, ServletException {
		
		HttpServletRequest hreq = (HttpServletRequest)arg0;
		HttpServletResponse response = (HttpServletResponse)arg1;
		response.setContentType("text/html;charset="+encode);
		HttpRequestWapper req = new HttpRequestWapper(hreq);
		arg2.doFilter(req, arg1);
	}
	
	public void init(FilterConfig arg0) throws ServletException {
		String encodeName = arg0.getInitParameter("encode");
		if(encodeName != null && !"".equals(encodeName.trim())){
			this.encode = encodeName;
		}
	}

	public class HttpRequestWapper extends HttpServletRequestWrapper{

		public HttpRequestWapper(HttpServletRequest request) {
			super(request);
			
		}
		//重写方法
		public String getParameter(String name){
			String str = null;
			str = encoding(((HttpServletRequest)this.getRequest()).getParameter(name));
			
			return str;
		}
		public String[] getParameterValues(String name){
			String[] str = null;
			str = ((HttpServletRequest)this.getRequest()).getParameterValues(name);
			if(str != null){
				for(int i = 0; i < str.length; i++){
					str[i] = encoding(str[i]);
				}
			}
			return str;
		}
		
	}
	//实现转码
	public String encoding(String str){
		if(str != null){
			try {
				str = new String(str.getBytes("iso-8859-1"),this.encode);
			} catch (UnsupportedEncodingException e) {
				e.printStackTrace();
			}
		}
		return str;
	}


}

     <filter>
  	<filter-name>EncodeFilter</filter-name>
  	<filter-class>cn.com.yd.gamecard.filter.EncodeFilter</filter-class>
  	<init-param>
  		<param-name>encode</param-name>
  		<param-value>gb2312</param-value>
  	</init-param>
  </filter>

[weiyongzhi2005]

谢谢各位的指点，问题已经解决了

[divchen]

能说下你怎么解决的么？采用的什么方法