test2.java

jsp编程jsp工程项目与实践 jsp源代码

package com.profilter;

import java.io.IOException;
import javax.servlet.*;
import javax.servlet.http.*;

public class Test2 implements Filter{
	
	private String login;
	private FilterConfig fc;

	public void init(FilterConfig arg0) throws ServletException {
		this.fc=arg0;
	}

	public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2) throws IOException, ServletException {
		if(fc==null){
			return;
		}
		HttpServletRequest request=(HttpServletRequest)arg0;
		HttpServletResponse response=(HttpServletResponse)arg1;
		HttpSession session=request.getSession();
		try{
			login=session.getAttribute("login").toString();
		}catch(Exception e){
			login="false";
		}
		if(login.equals("true")){
			fc.getServletContext().log("在Test2中通过");
			arg2.doFilter(arg0,arg1);
		}else{
			fc.getServletContext().log("被Test2拦截一个未认证的请求");
			response.sendRedirect("../Test.htm");
		}
	}

	public void destroy() {
		this.fc=null;
	}
	
	public void setFilterConfig(final FilterConfig filterConfig){
		this.fc=filterConfig;
	}

}