六：java中线程范围内共享变量--ThreadLocal

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前记

上一篇温习的是java中线程范围内的共享变量的map方式实现，这次来温习ThreadLocal方式

场景及代码

package com.web.thread;import java.util.Random;/*********************************************************************************//* Copyright (C) 2015 Pingan (PA). All Rights Reserved.//*//* Filename:      ThreadScopeShareData.java //* Revision:      1.0//* Author:        <gao yunqi>//* Created On:    2016年3月16日//* Modified by:   //* Modified On:   //*//* Description:   <线程范围内的共享变量ThreadLocal>/********************************************************************************/public class ThreadLocalTest {    private static ThreadLocal<Integer> threadLocal = new ThreadLocal<Integer> ();    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();                    threadLocal.set(data);                    System.out.println(Thread.currentThread().getName() +                         " has put data " + data);                    new Step1().getData();                    new Step2().getData();                }            }).start();        }    }    static class Step1{        public void getData(){            System.out.println("Step1 from " + Thread.currentThread().getName() +                     " get data " + threadLocal.get());        }    }    static class Step2{        public void getData(){            System.out.println("Step2 from " + Thread.currentThread().getName() +                     " get data " + threadLocal.get());        }    }}

以上便是ThreadLocal实现的线程范围内的共享变量

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