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Filter 做Controller 的demo

2024-11-06 00:11:40   204人阅读

indext.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>test</title>
</head>
<body>
	<a href=http://www.mamicode.com/"aaa_bbb.action">aaa_bbb.jsp>
建一个Filter 
package com.tre.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.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;

/**
 * Servlet Filter implementation class FileterDis
 */
@WebFilter("*.action")
public class FileterDis implements Filter {

    public FileterDis() {
    }
	public void destroy() {
	}

	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		 HttpServletRequest req = (HttpServletRequest)request;
		String url =req.getRequestURI();
		String path = null;
		System.out.print(url);
		if(url.equals("/test/aaa_bbb.action")){
			path = "/aaa_bbb.jsp";
			req.getRequestDispatcher(path).forward(request, response);
			return;
		}
		chain.doFilter(request, response);
	}
	
	public void init(FilterConfig fConfig) throws ServletException {
	}

}


请求成功跳转的页面
aaa_bbb.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
	aaa_bbb.jsp
</body>
</html>



Filter 做Controller 的demo


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