filtertest.java

一个简单实用的Fitler例子 一个简单实用的Fitler例子

package com.olcp.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 FilterTest implements Filter {

	public void destroy() {
		// TODO Auto-generated method stub

	}

	public void doFilter(ServletRequest arg0, ServletResponse arg1,
			FilterChain arg2) throws IOException, ServletException {
	System.out.println("-----------------");
		
	 HttpServletRequest res=(HttpServletRequest)arg0;
     HttpServletResponse rep=(HttpServletResponse)arg1;
     String name=res.getParameter("username");
     String psd=res.getParameter("password");
     
     rep.sendRedirect("index.jsp");
     
     //arg2.doFilter(arg0,arg1);

	}

	public void init(FilterConfig arg0) throws ServletException {
		// TODO Auto-generated method stub

	}

}