SSH版最大会话连接数

在登录方法中加入如下两行语句，作为程序的入口：

SessionListener.isAlreadyEnter(getHttpRequest().getSession(),this.getUserCode(),loginUser)

getHttpRequest().getSession().setAttribute(“isLoginIn”, “LoginIn”);

在SessionListener类中做相关的踢出处理：

1. import java.util.HashMap;
2.  import java.util.Iterator;
3.  import java.util.Map;
4.  import javax.servlet.ServletRequestEvent;
5.  import javax.servlet.ServletRequestListener;
6.  import javax.servlet.http.HttpServletRequest;
7.  import javax.servlet.http.HttpSession;
8.  import javax.servlet.http.HttpSessionAttributeListener;
9.  import javax.servlet.http.HttpSessionBindingEvent;
10.  import javax.servlet.http.HttpSessionEvent;
11.  import javax.servlet.http.HttpSessionListener;
12.  import org.apache.struts2.ServletActionContext;
13.  import com.hhwy.iepip.framework.message.Message;
14.  import com.opensymphony.xwork2.ActionContext;
15.   
16.  public class SessionListener implements HttpSessionListener,ServletRequestListener,HttpSessionAttributeListener{
17.  public static Map<String, HttpSession> sessionMap = new HashMap<String, HttpSession>();
18.  public static Map<String, HttpSession> sessionMap1 = new HashMap<String, HttpSession>();
19.  private static Boolean onlyOne = Boolean.valueOf(Message.getMessage(“session.onlyone”));
20.  private HttpServletRequest request ;
21.   
22.  /**获取request对象*/
23.  public void requestInitialized(ServletRequestEvent event) {
24.  request = (HttpServletRequest)event.getServletRequest();
25.  }
26.   
27.  /**以下是实现HttpSessionListener中的方法:该方法登录与否都会执行**/
28.  public void sessionCreated(HttpSessionEvent se){
29.  }
30.   
31.  /**以下是实现HttpSessionListener中的方法**/
32.  public void sessionDestroyed(HttpSessionEvent se){
33.  hUserName.remove(se.getSession().getId());
34.  UserObject.remove(se.getSession().getId());
35.  if(sessionMap!=null){
36.  sessionMap.remove(se.getSession().getId());
37.  }
38.  if(sessionMap1!=null){
39.  sessionMap1.remove(se.getSession().getId());
40.  }
41.  }
42.  /**
43.   * isAlreadyEnter-用于判断用户是否已经登录以及相应的处理方法
44.   * <该方法是系统业务的方法，不是处理单个用户登录的问题，以该方法做为程序的入口>
45.   */
46.  public static boolean isAlreadyEnter(HttpSession session,String sUserName,LoginUserInfo loginTriggers){
47.  boolean flag = false;
48.  return flag;
49.  }
50.   
51.  /**
52.   * 此方法，可以在登录时候添加一个session 用以判断是否已经登录，然后再进行登录人登录控制
53.   */
54.  public void attributeAdded(HttpSessionBindingEvent event) {
55.  //如果只允许一个账号一处登陆,单台客户端电脑只允许一个用户登录
56.  if(onlyOne.booleanValue()){
57.  String name = event.getName();
58.  if(name.equals(“isLoginIn”)){
59.  // 单台客户端电脑只允许一个用户登录
60.  String ipAddr = this.getIpAddr(request);
61.  //如果原先已登录，则踢出原先登陆的
62.  if(sessionMap1.containsKey(ipAddr) ){
63.  try{
64.  sessionMap1.get(ipAddr).invalidate();
65.  }catch(Exception e){}
66.  sessionMap1.remove(ipAddr);
67.  }
68.  if(ipAddr != null && event.getSession().isNew())
69.  sessionMap1.put(ipAddr, event.getSession());
70.   
71.  //只允许一个账号一个客户端登陆
72.  String userName= getUserName(event);
73.  if(sessionMap.containsKey(userName) ){
74.  try{
75.  sessionMap.get(userName).invalidate();
76.  }catch(Exception e){}
77.  sessionMap.remove(userName);
78.  }
79.  if(userName != null && event.getSession().isNew())
80.  sessionMap.put(userName, event.getSession());
81.  }
82.  }
83.  }
84.   
85.  public static String getIpAddr(HttpServletRequest request) {
86.  String ip = request.getHeader(“x-forwarded-for”);
87.  if (ip == null || ip.length() == 0 || “unknown”.equalsIgnoreCase(ip)) {
88.  ip = request.getHeader(“Proxy-Client-IP”);
89.  }
90.  if (ip == null || ip.length() == 0 || “unknown”.equalsIgnoreCase(ip)) {
91.  ip = request.getHeader(“WL-Proxy-Client-IP”);
92.  }
93.  if (ip == null || ip.length() == 0 || “unknown”.equalsIgnoreCase(ip)) {
94.  ip = request.getRemoteAddr();
95.  }
96.  return ip;
97.  }
98.   
99.  /*获取session中存储的用户名*/
100.  private String getUserName(HttpSessionBindingEvent se) {
101.  String userName = null;
102.  return userName;
103.  }
104.   
105.  public void attributeRemoved(HttpSessionBindingEvent event) {
106.  // TODO Auto-generated method stub
107.  }
108.   
109.  public void attributeReplaced(HttpSessionBindingEvent arg0) {
110.  // TODO Auto-generated method stub
111.  }
112.   
113.  public void requestDestroyed(ServletRequestEvent arg0) {
114.  // TODO Auto-generated method stub
115.  }
116.