usersecurityfilter.java

来自「网上购物系统struts+spring+hibernate实现」· Java 代码 · 共 27 行

package com.sdi0708.bdifn.bookstore.service.util;

import java.io.IOException;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class UserSecurityFilter extends HttpFilter {


	@Override
	public void doFilter(HttpServletRequest req, HttpServletResponse resp,
			FilterChain chain) throws IOException, ServletException {
		//如果还没有登陆,直接跳到登陆页面
		if(req.getSession().getAttribute("user") == null) {
			String path = req.getContextPath() + "/login.jsp";
			resp.sendRedirect(path);
		} else {
			chain.doFilter(req, resp);
		}
		
	}

}