实现每条线程有属于自己的session实例_怎么样创建session.entity-优快云博客

本文链接：https://blog.youkuaiyun.com/choi_xiaogui/article/details/80723980

本文介绍了一个使用Hibernate进行Session管理的示例，通过一个简单的Java程序演示了如何在一个应用中为每个线程分配独立的Session实例，并确保这些实例在不同线程间保持隔离。

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创建SessionTest.java

package com.Entity;
import org.hibernate.Session;  
import org.hibernate.SessionFactory;  
import org.hibernate.cfg.Configuration;  
  
public class SessionTest {  
    private static SessionFactory factory;  
    private static ThreadLocal<Session> threadLocal = new ThreadLocal<Session>();  
  
    // 获取SessionFactory  
    static {   // 静态初始化块，加载配置信息  
        Configuration cfg = new Configuration().configure();  // 读取hibernate.cfg.xml文件  
        factory = cfg.buildSessionFactory();  // 建立SessionFactory  
    }  
  
    public static Session getSession() {  
        Session session = threadLocal.get();  //获取当前线程下的session  
        if(session==null) {  
            System.out.println("session is null!");  
            session = factory.openSession();  
            threadLocal.set(session);  
        }  
        return session;  
    }  
    public static void closeSession() {  
        Session session = threadLocal.get();  
        //如果session不为null，则关闭session，并清空ThreadLocal  
        if(session!=null) {  
            session.close();  
            threadLocal.set(null);  
        }  
    }  
  
}

创建Threads.java

package com.Entity;
import org.hibernate.Session;
import com.Entity.SessionTest;
public class Threads extends Thread{  
    @Override  
    public void run() {  
        Session session1 = SessionTest.getSession();  
        Session session2 = SessionTest.getSession();  
        Session session3 = SessionTest.getSession();  
        long threadId = this.getId(); //获取线程id  
        //输出hashCode，分辨是否是同一个session实例  
        System.out.println("线程" +threadId+ ":\n" + session1.hashCode() + "\n"  + session2.hashCode() + "\n" + session3.hashCode());  
    }  
}

最后做测试Test.java

package com.DAO;

import com.Entity.Threads;
public class Test {
    public static void main(String[] args) {
    	Threads thread1 = new Threads();
    	Threads thread2 = new Threads();
    	Threads thread3 = new Threads();
        //启动线程
        thread1.start();
        thread2.start();
        thread3.start();
    }
}

运行结果截图：