现有一百个快递待派发，定义快递类Expresses 作为公共资源类，定义快递员线程类Mailman ,请开启三个线程派发此100个快递，并打印哪个快递员派发了哪一个快递。

public class Expresses {
    private String name;

    public Expresses() {
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Expresses(String name) {
        this.name = name;
    }

}

public class Mailman extends Thread{

    private static Expresses[] ex = new Expresses[100];
    static {
        for (int i = 0; i < 100; i++) {
            // 给100个快递赋予 名称
            ex[i] = new Expresses("快递-->"+i);
        }
    }

    private int index;
    private int number;

    @Override
    public void run() {
        for (int i = 0; i < 100; i++) {
            synchronized (Mailman.class) {
                if (index < 100) {
                    try {
                        Thread.sleep(100);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    //遍历得到对象数组每一个对象
                    Expresses e = ex[index++];
                    // 输入那个线程(快递员)派发了哪一份快递
                    System.out.println(Thread.currentThread().getName()+"派送了"+e.getName()+"快递");
                    number++;
                }
            }
        }
        System.out.println(getName() + "发了" + number+"份快递");
    }

}

    public static void main(String[] args) {
        Mailman m1 = new Mailman();
        m1.start();
        Mailman m2 = new Mailman();
        m2.start();
        Mailman m3 = new Mailman();
        m3.start();

    }

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搭建springMvc项目和链接mysql

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