共享的效果图：
A和B需要共享同一线程，同样的另一组A和B共享另一组线程，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<MyThreadScopeData> map = new ThreadLocal<MyThreadScopeData> ();
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;
}
}