从session中获取当前用户的工具类

 1 package cn.crmx.crm.util;
 2
 3 import javax.servlet.http.HttpServletRequest;
 4 import javax.servlet.http.HttpSession;
 5
 6 import org.springframework.web.context.request.RequestContextHolder;
 7 import org.springframework.web.context.request.ServletRequestAttributes;
 8
 9 import cn.crmx.crm.domain.Employee;
10 /**
11  * @Name UserContextUtil
12  * @Descr 用户上下文对象：设置和获取HttpSession登录的用户
13  * @author lne
14  * @date 2016年10月16日下午1:04:21
15  */
16 public class UserContextUtil {
17     public static final String LOGIN_USER = "loginUser";
18
19     public static void setUser(Employee emp, HttpSession session) {
20         session.setAttribute(LOGIN_USER, emp);
21     }
22
23     public static Employee getUser(HttpSession session) {
24         return (Employee)session.getAttribute(LOGIN_USER);
25     }
26
27     public static Employee getUser() {
28         return (Employee)getsession().getAttribute(LOGIN_USER);
29     }
30
31     public static HttpSession getsession() {
32         return getRequest().getSession();
33     }
34
35     public static HttpServletRequest getRequest()
36     {
37       ServletRequestAttributes requestAttributes = (ServletRequestAttributes)RequestContextHolder.getRequestAttributes();
38
39       HttpServletRequest request = requestAttributes.getRequest();
40
41       return request;
42     }
43 }

使用事项:

　　1. 需要spring的contextjar包支持.

　　2. 使用get方法即可获取相应的东西.