ThreadLocal实现线程隔离

使用ThreadLocal
public class ThreadLocalTest {
	
	private static ThreadLocal x = new ThreadLocal();
	//private static ThreadLocal myThreadScopeData = new ThreadLocal();
	
	public static void main(String[] args) {
		for(int i=0;i<2;i++){
			new Thread(new Runnable(){
				@Override
				public void run() {
					int data = new Random().nextInt();
					System.out.println(Thread.currentThread().getName() 
							+ " has put data :" + data);
					x.set(data);
					MyThreadScopeData.getThreadInstance().setName("name" + data);
					MyThreadScopeData.getThreadInstance().setAge(data);
					new A().get();
					new B().get();
				}
			}).start();
		}
	}
	
	static class A{
		public void get(){
			int data = x.get();
			System.out.println("A from " + Thread.currentThread().getName() 
					+ " get data :" + data);
			MyThreadScopeData myData = MyThreadScopeData.getThreadInstance();
			System.out.println("A from " + Thread.currentThread().getName() 
					+ " getMyData: " + myData.getName() + "," +
					myData.getAge());
		}
	}
	
	static class B{
		public void get(){
			int data = x.get();			
			System.out.println("B from " + Thread.currentThread().getName() 
					+ " get data :" + data);
			MyThreadScopeData myData = MyThreadScopeData.getThreadInstance();
			System.out.println("B from " + Thread.currentThread().getName() 
					+ " getMyData: " + myData.getName() + "," +
					myData.getAge());			
		}		
	}
}

class MyThreadScopeData{
	private static  MyThreadScopeData instance;//new MyThreadScopeData();
	private MyThreadScopeData(){}
	public static  MyThreadScopeData  getThreadInstance(){
		MyThreadScopeData instance = map.get();//放入ThreadLocal
		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 int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
}
用单例模式+HashMap模拟ThreadLocal
public class ThreadLocalTest2 {
	
	public static void main(String[] args) {
		for(int i=0;i<2;i++){
			new Thread(new Runnable(){
				@Override
				public void run() {
					int data = new Random().nextInt();
					System.out.println(Thread.currentThread().getName() 
							+ " has put data :" + data);
					MyThreadScopeData2.getThreadInstance().setName("name" + data);
					MyThreadScopeData2.getThreadInstance().setAge(data);
					new A().get();
					new B().get();
				}
			}).start();
		}
	}
	
	static class A{
		public void get(){
			MyThreadScopeData2 myData = MyThreadScopeData2.getThreadInstance();
			System.out.println("A from " + Thread.currentThread().getName() 
					+ " getMyData: " + myData.getName() + "," +
					myData.getAge());
		}
	}
	
	static class B{
		public void get(){
			MyThreadScopeData2 myData = MyThreadScopeData2.getThreadInstance();
			System.out.println("B from " + Thread.currentThread().getName() 
					+ " getMyData: " + myData.getName() + "," +
					myData.getAge());			
		}		
	}
}

class MyThreadScopeData2{
	private static  MyThreadScopeData2 instance;//new MyThreadScopeData2();
	private MyThreadScopeData2(){}
	public static synchronized MyThreadScopeData2  getThreadInstance(){
		MyThreadScopeData2 instance = set.get(Thread.currentThread().getName());//放入ThreadLocal
		if(instance == null){
			instance = new MyThreadScopeData2();
			set.put(Thread.currentThread().getName(),instance);
		}
		return instance;
	}
	
	static Map set=new HashMap();
	private String name;
	private int age;
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
}