1.创建容器类

//容器类
public class Contain {private static final ThreadLocal<DataPackage> local;static {local = new ThreadLocal<>();}public static ThreadLocal<DataPackage> getLocal() {return local;}
}

2.创建数据包类

//数据包类
public class DataPackage {private String str;private int num;public static DataPackage getInstance(String str, int num) {//获取当前线程共享的DataPackage对象ThreadLocal<DataPackage> local = Contain.getLocal();DataPackage dataPackage = local.get();if(dataPackage == null) {dataPackage = new DataPackage(str, num);local.set(dataPackage);}else {dataPackage.setStr(str);dataPackage.setNum(num);}return dataPackage;}private DataPackage(String str, int num) {super();this.str = str;this.num = num;}public String getStr() {return str;}public void setStr(String str) {this.str = str;}public int getNum() {return num;}public void setNum(int num) {this.num = num;}@Overridepublic String toString() {return "DataPackage [str=" + str + ", num=" + num + "]";}}

3.创建A类B类

public class A {public void println() {//获取容器ThreadLocal<DataPackage> local = Contain.getLocal();//通过当前线程获取对应的共享数据Thread t = Thread.currentThread();DataPackage data = local.get();System.out.println(t.getName() + "里的A类对象获取了数据：" + data);}}public class B {public void println() {ThreadLocal<DataPackage> local = Contain.getLocal();Thread t = Thread.currentThread();DataPackage data = local.get();System.out.println(t.getName() + "里的B类对象获取了数据：" + data);}}

4.创建测试类

public class Test01 {//知识点：线程局部变量共享的问题 -- 使用ThreadLocal解决该需求public static void main(String[] args) {//线程1new Thread(new Runnable() {@Overridepublic void run() {//共享的数据DataPackage dataPackage = DataPackage.getInstance("我好像在哪见过你", 10);//获取容器，并存储数据ThreadLocal<DataPackage> local = Contain.getLocal();local.set(dataPackage);//创建对象A a = new A();B b = new B();//获取共享数据a.println();b.println();}},"线程1").start();//线程2new Thread(new Runnable() {@Overridepublic void run() {//共享的数据DataPackage dataPackage = DataPackage.getInstance("明明就", 20);//获取容器，并存储数据ThreadLocal<DataPackage> local = Contain.getLocal();local.set(dataPackage);//创建对象A a = new A();B b = new B();//获取共享数据a.println();b.println();}},"线程2").start();}}