superfilter.java

又一个课程设计 简易 JSP 论坛 功能较简单的那种, 界面上模仿了 Discuz JSP 本来就学的不行, 只是尽量实现了 MVC

package cn.ialvin.bbs.filter;

import java.io.IOException;

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 cn.ialvin.bbs.bean.User;

public class SuperFilter implements javax.servlet.Filter {
	public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2) throws IOException, ServletException {
		HttpServletRequest request = (HttpServletRequest)arg0;
		HttpServletResponse response = (HttpServletResponse)arg1;
		if (!"YES".equals(request.getSession().getAttribute("isLogin"))) {
			response.sendError(404);
			return;
		}
		Object obj = request.getSession().getAttribute("usr");
		if (obj == null) {
			response.sendError(404);
			return;
		}
		User usr = (User)obj;
		if (!usr.isAdmin()) {
			response.sendError(404);
			return;
		}
		arg2.doFilter(arg0, arg1);
	}

	public void destroy() {}
	public void init(FilterConfig arg0) throws ServletException {}
}