Future结合ExecutorService的简单实例

叶澍成 — Sun, 12 Dec 2010 06:44:00 GMT

//ValueObject类

public class AdEntity {
    private String id;
    private String name;
    private String broker;
    private String date;
    private String body;
    //get/set

    public String toString(){
        return "【编号为:"+id+",广告名称为:"+name+",代理商为:"+broker+",发布日期为:"+date+",内容为:"+body+"】";
    }
}

//调用任务类

public class AdTask implements Callable<AdEntity> {
    @Override
    public AdEntity call() throws Exception {
        // 模拟远程调用花费的一些时间
        Thread.sleep(5*1000);
        AdEntity vo=new AdEntity();
        vo.setId(String.valueOf(new Random().nextInt(1000)));
        vo.setName("Ad@内衣广告");
        vo.setBroker("CHANNEL");
        Date date=new Date();
        SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
        String dateStr=sdf.format(date);
        vo.setDate(dateStr);
        vo.setBody("远端内容");
        return vo;
    }
}

//主函数

public class TestQueryMemg {

    /**
     * @param args
     * @throws ExecutionException
     * @throws InterruptedException
     */
    public static void main(String[] args) throws InterruptedException, ExecutionException {
        ExecutorService exec=Executors.newCachedThreadPool();
        //创建Future来完成网络调用任务
        Callable<AdEntity> returnAd=new AdTask();
        Future<AdEntity> future=exec.submit(returnAd);

        //开始执行本地化查询信息
        AdEntity localAd=new AdEntity();
        localAd.setId(String.valueOf(new Random().nextInt(1000)));
        localAd.setName("Ad@食品广告");
        localAd.setBroker("蒙牛");
        SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
        String dateStr=sdf.format(new Date());
        localAd.setDate(dateStr);
        localAd.setBody("内容本地");

        System.out.println("当前本地化查询内容为："+localAd.toString());
        System.out.println("稍等片刻以获取远端信息");

        while(!future.isDone()){
            try {
                Thread.sleep(1*1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        AdEntity entityRemote=(AdEntity)future.get();

        System.out.println("合并查询内容为：\n"+localAd.toString()+"\n"+entityRemote.toString());
    }
}

叶澍成 2010-12-12 14:44 发表评论

Future的一个简单实例

叶澍成 — Fri, 10 Dec 2010 12:53:00 GMT

个人账户类：

public class PrivateAccount implements Callable {
    Integer total;
    public Object call() throws Exception {
        Thread.sleep(5*1000);
        total=new Integer(new Random().nextInt(10000));
        System.out.println("您个人账户上还有"+total+" 存款可以支配");
        return total;
    }
}

主函数测试：

public class SumTest {
    /**
     * @param args
     * @throws ExecutionException
     * @throws InterruptedException
     */
    public static void main(String[] args) throws InterruptedException, ExecutionException {
        Callable privateAccount=new PrivateAccount();
        FutureTask task=new FutureTask(privateAccount);
                //创建新线程获取个人账户信息
        Thread thread=new Thread(task);
        thread.start();

        int total=new Random().nextInt(1000);
        System.out.println("主线程在这工作");
        System.out.println("您目前操作金额为： "+total+" .");
        System.out.println("请等待计算个人账户的金额");
        while(!task.isDone()){//判断是否已经获取返回值
            try {
                Thread.sleep(3*1000);
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
        Integer privateSingle=(Integer)task.get();
        int post=privateSingle.intValue();

        System.out.println("您当前账户共有金额为:"+(total+post)+" ￥");
    }

}

叶澍成 2010-12-10 20:53 发表评论

BlogJava-yeshucheng-随笔分类-多线程

Future结合ExecutorService的简单实例

Future的一个简单实例