效果图分享：

A和B需要共享同一线程，还有一组的相同A和B共享还有一组线程，两组相互之间不受影响。

代码：

package cn.itcast.lesson6;import java.util.Random;public class ThreadLocalTest {	public static void main(String[] args) {		for(int i=0;i<2;i++){			new Thread(new Runnable() {								public void run() {					int data = new Random().nextInt();					System.out.println(Thread.currentThread().getName()							+" has put data: " + data);					MyThreadScopeData.getThreadInstance().setName("name" + data);					MyThreadScopeData.getThreadInstance().setAge(data);					new A().get();					new B().get();				}			}).start();		}		}	static class A{		public void get(){			MyThreadScopeData myData = MyThreadScopeData.getThreadInstance();			System.out.println("A from" + Thread.currentThread().getName()					+ " getMyData:" + myData.getName()+" , "					+ myData.getAge());		}	}	static class B{		public void get(){			MyThreadScopeData myData =  MyThreadScopeData.getThreadInstance();			System.out.println("B from" + Thread.currentThread().getName()					+ " getMyData:"+myData.getName()+" , "					+ myData.getAge());		}	}} class  MyThreadScopeData{	private MyThreadScopeData(){}//单例隐藏ThreadLocal实现数据共享		public static /*synchronized*/ MyThreadScopeData getThreadInstance(){		MyThreadScopeData instance = map.get();		if(instance == null){			instance = new MyThreadScopeData();			map.set(instance);		}		return instance;	}	private static ThreadLocal
     
       map = new  ThreadLocal
      
        ();		private String name;	private int age;	public String getName() {		return name;	}	public  void setName(String name) {		this.name = name;	}	public  void setAge(int age) {		this.age = age;	}	public int getAge() {		return age;	}}
      
     

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