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将登录等信息保存到session中和退出session

2017-12-21 09:51 281 查看
做项目时,可能会将某些信息保存在session中,如登录等信息,这样方便在某些页面使用这些保存的信息。

要想保存这些信息,需要创建一个类,该类里面定义需要保存的变量等信息,当登录后就通过new一个该类来保存登录等信息,然后放在session中,需要用到这些信息时直接用例如EL表达式等取出来就OK了。例子如下:

1.保存用户信息的类

[java] view plain copy print?<span style="font-size:14px;"><span style="font-family:Microsoft YaHei;">public class WSessionInfo implements java.io.Serializable {<span style="white-space:pre"> </span>

private String id;// 用户ID
private String loginname;// 登录名
private String name;// 姓名
private String ip;// 用户IP
private String userimg; //图片
private RegisterUser user; //用户注册信息
private String usertype;//用户类型
private String chengsid;//城市编号
private String cityname;//城市名
private List<String> resourceList;// 用户可以访问的资源地址列表
private List<String> resourceAllList;

public String getId() {
return id;
}

public void setId(String id) {
this.id = id;
}
public String getChengsid() {
return chengsid;
}

public void setChengsid(String chengsid) {
this.chengsid = chengsid;
}
<span style="white-space:pre"> </span>......
}</span>

</span>
<span style="font-size:14px;"><span style="font-family:Microsoft YaHei;">public class WSessionInfo implements java.io.Serializable {<span style="white-space:pre"> </span>    private String id;// 用户ID    private String loginname;// 登录名    private String name;// 姓名    private String ip;// 用户IP    private String userimg; //图片    private RegisterUser user;  //用户注册信息        private String usertype;//用户类型    private String chengsid;//城市编号    private String cityname;//城市名    private List<String> resourceList;// 用户可以访问的资源地址列表    private List<String> resourceAllList;        public String getId() {        return id;    }    public void setId(String id) {        this.id = id;    }    public String getChengsid() {        return chengsid;    }    public void setChengsid(String chengsid) {        this.chengsid = chengsid;    }<span style="white-space:pre">    </span>......}</span></span>
2.在Controller中保存登录等信息

[java] view plain copy print?<span style="font-size:14px;"><span style="font-family:Microsoft YaHei;"><span style="white-space:pre"> </span>@RequestMapping("/login")
@ResponseBody
public Json login(Account user, HttpSession session) {
......
WSessionInfo sessionInfo = new WSessionInfo();//保存用户信息的类
sessionInfo.setId(loginUser.getId());//为类里面的属性赋值,即把登录信息保存在这个类中
sessionInfo.setLoginname(loginUser.getLoginname());
sessionInfo.setUsertype(loginUser.getUsertype());
sessionInfo.setUser(regUser);
session.setAttribute(GlobalConstant.SESSION_WAP_INFO, sessionInfo);//将信息保存在session中
}
</span></span>
<span style="font-size:14px;"><span style="font-family:Microsoft YaHei;"><span style="white-space:pre">  </span>@RequestMapping("/login")    @ResponseBody    public Json login(Account user, HttpSession session) {        ......        WSessionInfo sessionInfo = new WSessionInfo();//保存用户信息的类        sessionInfo.setId(loginUser.getId());//为类里面的属性赋值,即把登录信息保存在这个类中        sessionInfo.setLoginname(loginUser.getLoginname());        sessionInfo.setUsertype(loginUser.getUsertype());        sessionInfo.setUser(regUser);        session.setAttribute(GlobalConstant.SESSION_WAP_INFO, sessionInfo);//将信息保存在session中     }</span></span>
3.在页面使用

[java] view plain copy print?<span style="font-size:14px;"><span style="font-family:Microsoft YaHei;"><%@page import="com.wxm.framework.constant.GlobalConstant"%>
<%@page import="com.wxm.pageModel.base.WSessionInfo"%>
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<c:set var="ctx" value="${pageContext.request.contextPath}"/>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

<span style="white-space:pre"> </span><strong>WSessionInfo sessionInfo = (WSessionInfo) request.getSession().getAttribute(GlobalConstant.SESSION_WAP_INFO);//获取保存的登录等信息</strong>

if(sessionInfo!=null){//判断保存的信息是否为空,即判断用户是否登录
response.sendRedirect("/bd/wap/ar.jsp");//如果用户登录后就跳转到某个页面
}
%>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<base href="<%=basePath%>">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<meta charset="utf-8">
<title>登录</title>
<meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
</head>

<body>
</body>
</html>
</span></span>
<span style="font-size:14px;"><span style="font-family:Microsoft YaHei;"><%@page import="com.wxm.framework.constant.GlobalConstant"%><%@page import="com.wxm.pageModel.base.WSessionInfo"%><%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %><c:set var="ctx" value="${pageContext.request.contextPath}"/><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";<span style="white-space:pre">    </span><strong>WSessionInfo sessionInfo = (WSessionInfo) request.getSession().getAttribute(GlobalConstant.SESSION_WAP_INFO);//获取保存的登录等信息</strong>                    if(sessionInfo!=null){//判断保存的信息是否为空,即判断用户是否登录        response.sendRedirect("/bd/wap/ar.jsp");//如果用户登录后就跳转到某个页面}%><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><base href="<%=basePath%>"><meta http-equiv="content-type" content="text/html; charset=UTF-8"><meta charset="utf-8"><title>登录</title><meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no"><meta name="apple-mobile-web-app-capable" content="yes"><meta name="apple-mobile-web-app-status-bar-style" content="black"></head><body></body></html></span></span>
4.退出session

[java] view plain copy print?<span style="font-family:Microsoft YaHei;"><span style="white-space:pre"> </span>@RequestMapping("/logout")
@ResponseBody
public Json logout(HttpSession session) {
<span style="white-space:pre"> </span>Json j = new Json();//这个类是保存成功或失败的信息
if (session != null) {
session.invalidate();//调用session的invalidate()方法,将保存的session删除
}
j.setSuccess(true);
j.setMsg("退出登录成功!");
return j;
<span style="white-space:pre"> </span>}</span>
<span style="font-family:Microsoft YaHei;"><span style="white-space:pre">   </span>@RequestMapping("/logout")    @ResponseBody    public Json logout(HttpSession session) {<span style="white-space:pre">        </span>Json j = new Json();//这个类是保存成功或失败的信息        if (session != null) {            session.invalidate();//调用session的invalidate()方法,将保存的session删除        }        j.setSuccess(true);        j.setMsg("退出登录成功!");        return j;<span style="white-space:pre">    </span>}</span>
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