JavaFuture模式

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/**
 *
 * @author lx
 */

import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.FutureTask;

public class FutureTackDome {

    
    /**
     * Java Future模式简单使用： 在此案例中模拟，接到到订单数据，并调用支付接口进行支付，支付成功返回2，支付失败返回0
     * 
     * @param args
     * @throws Exception
     * @throws ExecutionException
     */
    public static void main(String[] args) throws Exception, ExecutionException {
        Callable<Student> callable = () -> {
                    int id = 0;
                    System.out.println("调用支付接口");
                    while (id != 2) {
                        Thread.sleep(5000);//模拟支付時間
                        System.out.println("正在查询付款状态...");
                        System.out.println("状态为：" + id);
                        id++;
                    }
                    
                    if (id == 2) {
                        // 付款成功
                        return new Student(id);
                        
                    } else {
                        // 付款失败
                        return new Student(0);
                    }
                };
        FutureTask<Student> futureTask = new FutureTask<>(callable);
        new Thread(futureTask).start();

        while (futureTask.isDone()) {// 模拟等待支付状态回调

        }
        System.out.println((futureTask.get().getId() == 2 ? "支付成功" : "支付失败"));

    }
}
//实体类
class Student {
    Student() {

    }

    public Student(int id) {
        super();
        this.id = id;
    }

    private int id;

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    @Override
    public String toString() {
        return "Student [id=" + id + "]";
    }

}

运行示例：
run:
调用支付接口
正在查询付款状态...
状态为：0
正在查询付款状态...
状态为：1
支付成功
成功构建 (总时间: 10 秒)