登陆拦截器LoginInterceptor

[java]代码库

package com.liang.bike.interceptor;

import com.liang.bike.bean.base.UserBase;
import org.apache.log4j.Logger;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

public class LoginInterceptor implements HandlerInterceptor {
    private Logger logger = Logger.getLogger(LoginInterceptor.class);

    // 身份认证、身份授权
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

        // 判断session
        HttpSession session = request.getSession();
        UserBase user = (UserBase) session.getAttribute("user");
        boolean flag = false;
        if (user != null) {
            flag = true;
        } else {
            // 获取请求的url
            String redirectUrl = request.getRequestURI();
            session.setAttribute("redirectUrl", redirectUrl);
            String bikeNo = request.getParameter("bikeNo");
            session.setAttribute("bikeNo", bikeNo);
            logger.info("请求的URL" + redirectUrl + bikeNo);
            // 执行这里表示用户身份需要认证，跳转登陆页面
            logger.info("跳转到登录页面:login.jsp");
            request.getRequestDispatcher("/WEB-INF/bike/user/login.jsp").forward(request, response);
        }
        return flag;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        logger.info("拦截器postHandle方法执行");
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        logger.info("拦截器afterCompletion方法执行");
    }
}