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;
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 ;
22. /**获取request对象*/
23. public void requestInitialized(ServletRequestEvent event) {
24. request = (HttpServletRequest)event.getServletRequest();
25. }
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. }
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. }
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());
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. }
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. }
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. }
105. public void attributeRemoved(HttpSessionBindingEvent event) {
106. // TODO Auto-generated method stub
107. }
109. public void attributeReplaced(HttpSessionBindingEvent arg0) {
110. // TODO Auto-generated method stub
111. }
113. public void requestDestroyed(ServletRequestEvent arg0) {
114. // TODO Auto-generated method stub
115. }