{"appid": "88888888","userid": 80,"datatype": "***","data":"{\"dataids\":[146,147,148]}"
}

public class ThreadLocal<T> {public void set(T value) {Thread t = Thread.currentThread();ThreadLocalMap map = getMap(t);  //拿到线程私有的ThreadLocalMapif (map != null)map.set(this, value);  //Thread对象中 map key是ThreadLocal对象 elsecreateMap(t, value);  }public T get() {Thread t = Thread.currentThread();ThreadLocalMap map = getMap(t);if (map != null) {ThreadLocalMap.Entry e = map.getEntry(this);if (e != null) {@SuppressWarnings("unchecked")T result = (T)e.value;return result;}}return setInitialValue();}void createMap(Thread t, T firstValue) {t.threadLocals = new ThreadLocalMap(this, firstValue);  }ThreadLocalMap(ThreadLocal<?> firstKey, Object firstValue) {table = new Entry[INITIAL_CAPACITY];int i = firstKey.threadLocalHashCode & (INITIAL_CAPACITY - 1); //hashcode & 运算去除高位table[i] = new Entry(firstKey, firstValue);size = 1;setThreshold(INITIAL_CAPACITY);}
}

 public static void main(String[] args) {ThreadLocal<Person> threadLocal = new ThreadLocal<>(); //每个线程局部变量都需要创建一个ThreadLocal对象ThreadLocal<String> threadLocal2 = new ThreadLocal<>();AtomicInteger atomicInteger = new AtomicInteger(1000);ExecutorService executorService = Executors.newCachedThreadPool();　　　　　//for(int i 0->10)executorService.submit(() -> {Person person = new Person();person.setIdcard(atomicInteger.getAndIncrement());person.setName(Thread.currentThread().getName());threadLocal.set(person);threadLocal2.set("haha");System.out.println(threadLocal.get());System.out.println(threadLocal2.get());System.out.println();threadLocal.remove();});executorService.shutdown();}