Threadlocal与InheritableThreadLocal

Threadlocal可以维持一个线程独立的变量，但是当我们需要一个线程独立变量需要对子线程共享这个变量时Threadlocal就不能取到值了。InheritableThreadLocal就能处理这种情况

public class QuickTest {
private ThreadLocal<String> localInfo = new ThreadLocal<String>();
private InheritableThreadLocal<String> inLocalInfo = new InheritableThreadLocal<String>();

@Test
public void testInheriableThreadlocal() throws InterruptedException{
localInfo.set("thread main");
inLocalInfo.set("inthread main");

Thread myThread =new Thread(new Runnable() {
public void run() {
System.out.println(Thread.currentThread()+" localThead:"+localInfo.get());
System.out.println(Thread.currentThread()+" InlocalThead:"+inLocalInfo.get());
}
});
myThread.start();
myThread.join();

System.out.println(Thread.currentThread()+" localThead:"+localInfo.get());
System.out.println(Thread.currentThread()+" InlocalThead:"+inLocalInfo.get());
}
}

在代码中ThreadLocal在子线程不能拿到，InheritableThreadLocal就能拿到了。