Future future = executor.submit(new FileCleanRunnable(new FileCleanTask(List<String>)dir)); 报错，可以改为正确的吗，么

根据你的代码，可能存在以下两种情况：

1. `FileCleanRunnable` 的构造方法需要传入 `FileCleanTask` 对象，而你的代码中直接传入了一个类型为 `List<String>` 的参数 `dir`，所以需要将 `dir` 封装为 `FileCleanTask` 对象：

FileCleanTask task = new FileCleanTask(dir);
Future future = executor.submit(new FileCleanRunnable(task));

2. 如果 `FileCleanRunnable` 的构造方法可以接收 `List<String>` 类型的参数，则需要修改 `FileCleanRunnable` 的构造方法：

public class FileCleanRunnable implements Runnable {
    private List<String> dir;

    public FileCleanRunnable(List<String> dir) {
        this.dir = dir;
    }

    @Override
    public void run() {
        // do something with dir
    }
}

// 调用方法：
Future future = executor.submit(new FileCleanRunnable(dir));

相关问题

run() { try { FileCleanTaskResponse poll = pollTasks(1); List<FileCleanTask> tasks = poll.getCleanTasks(); log.info("cleantasks:" + tasks); if (tasks.isEmpty()) { try { Thread.sleep(60000); } catch (InterruptedException e) { e.printStackTrace(); } } long startTimeMills = System.currentTimeMillis(); List<Future> futures = new ArrayList<>(); for (FileCleanTask task : tasks) { List<String> dirs = task.getCleanDirs(); log.info("cleandirs:" + dirs); dirs.stream().forEach(dir -> { Future future = executor.submit(new FileCleanRunnable(dir)); futures.add(future); }); } //等待所有线程执行结束 for (Future future : futures) { try { future.get(); } catch (InterruptedException e) { log.error("clean task interupt", e); } catch (ExecutionException e) { log.error("clean task ", e); } } log.info("ALL File clean thread finish,cost: {} ms", (System.currentTimeMillis() - startTimeMills)); }添加异常并且可以过kw

您可以将代码修改为以下形式，添加了异常处理，并且去掉了最后一行的 "添加异常并且可以过kw"：

run() {
    try {
        FileCleanTaskResponse poll = pollTasks(1);
        List<FileCleanTask> tasks = poll.getCleanTasks();
        log.info("cleantasks:" + tasks);

        if (tasks.isEmpty()) {
            try {
                Thread.sleep(60000);
            } catch (InterruptedException e) {
                log.error("Interrupted while sleeping", e);
            }
        }

        long startTimeMills = System.currentTimeMillis();
        List<Future> futures = new ArrayList<>();
        for (FileCleanTask task : tasks) {
            List<String> dirs = task.getCleanDirs();
            log.info("cleandirs:" + dirs);
            dirs.stream().forEach(dir -> {
                Future future = executor.submit(new FileCleanRunnable(dir));
                futures.add(future);
            });
        }

        //等待所有线程执行结束
        for (Future future : futures) {
            try {
                future.get();
            } catch (InterruptedException e) {
                log.error("Interrupted while waiting for thread to finish", e);
                Thread.currentThread().interrupt();
            } catch (ExecutionException e) {
                log.error("Error executing thread", e);
            }
        }

        log.info("ALL File clean thread finish,cost: {} ms", (System.currentTimeMillis() - startTimeMills));
    } catch (Exception e) {
        log.error("An error occurred while running the task", e);
    }
}

这样做的好处是，如果在执行任务的过程中遇到异常，程序不会立即退出，而是记录下错误信息，然后继续执行后面的任务。同时，如果在等待线程执行结束的过程中程序被中断，也会记录下错误信息，并保证程序正确退出。

private class TaskPollRunnable implements Runnable { @Override public void run() { FileCleanTaskResponse poll = pollTasks(1); List<FileCleanTask> tasks = poll.getCleanTasks(); log.info("cleantasks:"+tasks); if(tasks.isEmpty()){ try { Thread.sleep(60000); } catch (InterruptedException e) { e.printStackTrace(); } } long startTimeMills = System.currentTimeMillis(); List<Future> futures = new ArrayList<>(); for(FileCleanTask task : tasks){ List<String> dirs = task.getCleanDirs(); log.info("cleandirs:"+dirs); dirs.stream().forEach(dir->{ Future future = executor.submit(new FileCleanRunnable(dir));//1个网元1个线程 futures.add(future); }); } //等待所有线程执行结束 for(Future future:futures){ try { future.get(); } catch (InterruptedException e) { log.error("clean task interupt",e); } catch (ExecutionException e) { log.error("clean task ",e); } } log.info("ALL File clean thread finish,cost: {} ms",(System.currentTimeMillis() - startTimeMills)); }写 ut

好的，以下是该代码的一个可能的UT：

@Test
public void testTaskPollRunnable() throws ExecutionException, InterruptedException {
    // 准备测试数据
    FileCleanTaskResponse response = new FileCleanTaskResponse();
    List<FileCleanTask> tasks = new ArrayList<>();
    FileCleanTask task1 = new FileCleanTask();
    List<String> dirs1 = new ArrayList<>();
    dirs1.add("/tmp/dir1");
    dirs1.add("/tmp/dir2");
    task1.setCleanDirs(dirs1);
    tasks.add(task1);
    response.setCleanTasks(tasks);

    // mock pollTasks方法返回值
    when(mockedFileCleanService.pollTasks(anyInt())).thenReturn(response);

    // mock executor.submit方法，直接调用run方法执行
    doAnswer(invocation -> {
        ((Runnable) invocation.getArgument(0)).run();
        return null;
    }).when(mockedExecutor).submit(any(Runnable.class));

    // 执行测试
    TaskPollRunnable taskPollRunnable = new TaskPollRunnable();
    taskPollRunnable.setFileCleanService(mockedFileCleanService);
    taskPollRunnable.setExecutor(mockedExecutor);
    taskPollRunnable.run();

    // 验证结果
    verify(mockedFileCleanService, times(1)).pollTasks(1);
    verify(mockedExecutor, times(2)).submit(any(Runnable.class)); // 共两个目录，两个线程
}

需要注意的是，该UT使用了Mockito框架，需要先导入Mockito相关的依赖。同时，由于该代码中使用了线程池，需要使用Mockito的doAnswer方法模拟线程池的submit方法，使得测试中的线程直接调用run方法执行。