spring拦截器实现seesion过期跳转首页

1package com.zpedku.interceptor;
2
3import com.zpedku.config.AppConfig;
4import com.zpedku.model.SysUser;
5import lombok.extern.slf4j.Slf4j;
6import org.apache.commons.lang.StringUtils;
7import org.springframework.beans.factory.annotation.Value;
8import org.springframework.web.servlet.HandlerInterceptor;
9import org.springframework.web.servlet.ModelAndView;
10
11import javax.servlet.http.HttpServletRequest;
12import javax.servlet.http.HttpServletResponse;
13import javax.servlet.http.HttpSession;
14
15/**
16 * session过期跳转页面拦截器
17 */
18@Slf4j
19public class SystemSessionInterceptor implements HandlerInterceptor {
20
21    @Value("${projectName}")
22    private String projectName;
23
24    @Override
25    public boolean preHandle(HttpServletRequest req, HttpServletResponse res, Object o) throws Exception {
26
27        HttpSession session = req.getSession(true);
28        String requestURI = req.getRequestURI();
29        log.info("requestURI={}",requestURI);
30        if(StringUtils.contains(requestURI, AppConfig.LOGIN_PATH)) return true;
31
32        SysUser sysUser = (SysUser) session.getAttribute(AppConfig.SYS_USER_SESSION);
33        if(sysUser!=null) return true;
34        if(isAjax(req)){//若是ajax请求,直接设置请求头session过期
35            res.setHeader("sessionstatus", "timeout");
36            res.sendError(518, "session timeout.");
37        }else{
38            //res.sendRedirect(req.getSession().getServletContext().getContextPath() + 
39            //"/login.html");
40            res.setContentType("text/html");
41            res.setCharacterEncoding("utf-8");
42            PrintWriter out = res.getWriter();
43            StringBuilder builder = new StringBuilder();
44            builder.append("<script type=\"text/javascript\" charset=\"UTF-8\">");
45            //builder.append("alert(\"登录已过期，请重新登录！\");");
46            builder.append("parent.window.location.href='"+req.getContextPath()+"/login.html';");
47            builder.append("</script>");
48            out.print(builder.toString());
49            out.close();
50            return false;
51
52        }
53
54
55        return false;
56    }
57
58    @Override
59    public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {
60
61    }
62
63    @Override
64    public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {
65
66    }
67
68    /**
69     * 判断是否是ajax请求
70     * @param req
71     * @return
72     */
73    private boolean isAjax(HttpServletRequest req){
74        if( req.getHeader("x-requested-with") != null && req.getHeader("x-requested-with").equals("XMLHttpRequest")) return true;
75        return false;
76    }
77
78}