private static ThreadLocal tl = new ThreadLocal();
public static void main(String[] args) {
tl.set("nihao");//容器：Map容器--》[key:当前线程对象,value:nihao]
Object o = tl.get();//默认的key是当前线程
System.out.println(o);//nihao
tl.remove();//默认的key是当前线程
o = tl.get();
System.out.println(o);
}
原文：http://www.cnblogs.com/ganchuanpu/p/6158402.html