Tomcat自定义Session管理

package com.nosession;  

import java.io.IOException;  
import org.apache.catalina.Lifecycle;  
import org.apache.catalina.LifecycleException;  
import org.apache.catalina.LifecycleListener;  
import org.apache.catalina.LifecycleState;  
import org.apache.catalina.Session;  
import org.apache.catalina.session.ManagerBase;  
import org.apache.catalina.util.LifecycleSupport;  

public class SessionManager extends ManagerBase implements Lifecycle {  
    protected LifecycleSupport lifecycle = new LifecycleSupport(this);  

    @Override  
    public void addLifecycleListener(LifecycleListener listener) {  
        lifecycle.addLifecycleListener(listener);  
    }  

    @Override  
    public LifecycleListener[] findLifecycleListeners() {  
        return lifecycle.findLifecycleListeners();  
    }  

    @Override  
    public void removeLifecycleListener(LifecycleListener listener) {  
        lifecycle.removeLifecycleListener(listener);  
    }  

    @Override  
    protected synchronized void startInternal() throws LifecycleException {  
        super.startInternal();  
        setState(LifecycleState.STARTING);  
        setDistributable(true);  
    }  

    @Override  
    protected synchronized void stopInternal() throws LifecycleException {  
        setState(LifecycleState.STOPPING);  
    }  

    @Override  
    public int getRejectedSessions() {  
        return 0;  
    }  

    public void setRejectedSessions1(int i) {  
    }  

    @Override  
    public void load() throws ClassNotFoundException, IOException {  
    }  

    public void setRejectedSessions(int arg0) {  

    }  

    @Override  
    public void unload() throws IOException {  
    }  

    @Override  
    public Session createSession(String sessionId) {  
        // TODO 关键位置  
        return null;  
    }  

    public Session createSession() {  
        // TODO 关键位置  
        return null;  
    }  

    @Override  
    public Session createEmptySession() {  
        // TODO 关键位置  
        return null;  
    }  

    @Override  
    public void add(Session session) {  

    }  

    @Override  
    public Session findSession(String id) {  
        return null;  
    }  

    @Override  
    public void remove(Session session) {  
        remove(session, false);  
    }  

    @Override  
    public void remove(Session session, boolean update) {  

    }  

    @Override  
    public void processExpires() {  
    }  
}  

用该代码单独创建一个工程，并导出为jar文件，并把导出的jar文件放到Tomcat的lib文件夹中，然后修改配置文件context.xml，修改环境Manager节点为如下内容：

<Manager className="com.nosession.SessionManager" />

转载自：http://blog.csdn.net/ywch520/article/details/51606414