restful接口通过sessionId获取指定session
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2022-07-12 18:49:50
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目前并没有方法直接通过sessionId找到指定的session.
我们需要在session创建时,手动的将该session和它的sessionId以值和键的方式存放到一个Map中,这样就可以根据sessionId从map中找到对应的session.
实现:首先创建一个session的监听事件
MySessionListener.java:
public class MySessionListener implements HttpSessionListener {
public void sessionCreated(HttpSessionEvent httpSessionEvent) {
MySessionContext.AddSession(httpSessionEvent.getSession());
}
public void sessionDestroyed(HttpSessionEvent httpSessionEvent) {
HttpSession session = httpSessionEvent.getSession();
MySessionContext.DelSession(session);
}
}
web.xml添加一个监听器:
<listener>
<listener-class>listener.MySessionListener</listener-class>
</listener>
全局静态map
MySessionContext.Java:
public class MySessionContext {
private static HashMap mymap = new HashMap();
public static synchronized void AddSession(HttpSession session) {
if (session != null) {
mymap.put(session.getId(), session);
}
}
public static synchronized void DelSession(HttpSession session) {
if (session != null) {
mymap.remove(session.getId());
}
}
public static synchronized HttpSession getSession(String session_id) {
if (session_id == null)
return null;
return (HttpSession) mymap.get(session_id);
}
}
使用:通过sessionId从map中取值
String sessionId = request.getParameter("sessionId");
HttpSession session = MySessionContext.getSession(sessionId);
我们需要在session创建时,手动的将该session和它的sessionId以值和键的方式存放到一个Map中,这样就可以根据sessionId从map中找到对应的session.
实现:首先创建一个session的监听事件
MySessionListener.java:
public class MySessionListener implements HttpSessionListener {
public void sessionCreated(HttpSessionEvent httpSessionEvent) {
MySessionContext.AddSession(httpSessionEvent.getSession());
}
public void sessionDestroyed(HttpSessionEvent httpSessionEvent) {
HttpSession session = httpSessionEvent.getSession();
MySessionContext.DelSession(session);
}
}
web.xml添加一个监听器:
<listener>
<listener-class>listener.MySessionListener</listener-class>
</listener>
全局静态map
MySessionContext.Java:
public class MySessionContext {
private static HashMap mymap = new HashMap();
public static synchronized void AddSession(HttpSession session) {
if (session != null) {
mymap.put(session.getId(), session);
}
}
public static synchronized void DelSession(HttpSession session) {
if (session != null) {
mymap.remove(session.getId());
}
}
public static synchronized HttpSession getSession(String session_id) {
if (session_id == null)
return null;
return (HttpSession) mymap.get(session_id);
}
}
使用:通过sessionId从map中取值
String sessionId = request.getParameter("sessionId");
HttpSession session = MySessionContext.getSession(sessionId);
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