UserSecurityInterceptor.java

package me.jcala.blog.interceptor;

import me.jcala.blog.domain.Info;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

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

/**
 * 用户登录后台管理的拦截器
 * 存在该用户session则允许通过，否则返回登录页面
 */
@Component
public class UserSecurityInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        Object obj = request.getSession().getAttribute("cur_user");
        if (obj == null || !(obj instanceof Info)) {
            response.sendRedirect(request.getContextPath() + "/login");
            return false;
        }
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {

    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {

    }
}