java – 如何使用ExecutorService的返回值
发布时间:2020-12-15 04:48:46 所属栏目:Java 来源:网络整理
导读:我在ExecutorService(发送电子邮件)下运行for循环 如果任何返回类型失败,我需要将返回resposne返回为“Fail” 或者我需要返回返回resposne作为“成功” 但在这种情况下,我无法返回值 我这样试过 import java.text.ParseException;import java.util.concurren
我在ExecutorService(发送电子邮件)下运行for循环
如果任何返回类型失败,我需要将返回resposne返回为“Fail” 但在这种情况下,我无法返回值 我这样试过 import java.text.ParseException; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; public class Test { public static void main(String[] args) throws ParseException { String response = getDataCal(); System.out.println(response); } public static String getDataCal() { ExecutorService emailExecutor = Executors.newSingleThreadExecutor(); emailExecutor.execute(new Runnable() { @Override public void run() { try { for(int i=0;i<2;i++) { String sss = getMYInfo(i); System.out.println(); } } catch (Exception e) { e.printStackTrace(); } } }); return sss; } public static String getMYInfo(int i) { String somevav = "success";//Sometimes it returns fail or success if(i==0) { somevav ="success"; } else { somevav ="fail"; } return somevav; } } 解决方法
在Callable< String>中调用你的getMYInfo(i),将这个callable提交给executor,然后等待Future< String>的竞争.
private static ExecutorService emailExecutor = Executors.newSingleThreadExecutor(); public static void main(String[] args) { getData(); } private static void getData() { List<Future<String>> futures = new ArrayList<>(); for (int i = 0; i < 2; i++) { final Future<String> future = emailExecutor.submit(new MyInfoCallable(i)); futures.add(future); } for (Future<String> f : futures) { try { System.out.println(f.get()); } catch (InterruptedException | ExecutionException ex) { } } } public static String getMYInfo(int i) { String somevav = "success"; if (i == 0) { somevav = "success"; } else { somevav = "fail"; } return somevav; } private static class MyInfoCallable implements Callable<String> { int i; public MyInfoCallable(int i) { this.i = i; } @Override public String call() throws Exception { return getMYInfo(i); } } (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |