package com.system.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;

import javax.servlet.http.HttpSession;

import com.system.user.User;

public class IndexFilter implements Filter {

@Override

public void destroy() {

// TODO Auto-generated method stub

System.out.println("过滤器已销毁");

}

@Override

public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2)

throws IOException, ServletException {

// TODO Auto-generated method stub

System.out.println("过滤器已生效");

boolean flag=false;

HttpServletRequest request=(HttpServletRequest)arg0;

request.setCharacterEncoding("UTF-8");

HttpServletResponse response=(HttpServletResponse)arg1;

response.setContentType("text/html;charset=UTF-8");

User sessionuser=(User)request.getSession().getAttribute("superuser");

System.out.print(sessionuser);

if(sessionuser==null) {

request.setAttribute("error", "您需要先登录后才可以访问");

request.getRequestDispatcher("/login.jsp").forward(request, response);

}

else {

arg2.doFilter(request, response);

}

}

@Override

public void init(FilterConfig arg0) throws ServletException {

// TODO Auto-generated method stub

System.out.println("过滤器已初始化");

}

}