java - 如何在线程中关闭 FileHandlers？

Question

我想在线程完成或强制完成后关闭所有 FileHandler。
我创建了一个 closeLogger 函数，但它似乎没有被调用
因为我看到文件仍然锁定在文件夹中。

1. 有什么问题？
2. 在eclipse中强行终止执行是否也可以处理？

我的代码如下:

public class Passenger extends Thread {

    private Logger logger;

    public Passenger() throws SecurityException, IOException, InterruptedException {
        logger = Logger.getLogger(String.format("Passenger%sLogger", name));
        FileHandler fileHandler = new FileHandler(String.format(".\\Logs\\PassengerLogs\\passenger_%s.txt", name), true);
        fileHandler.setFormatter(new LogFormatter());
        logger.addHandler(fileHandler);
    }

    @Override
    public void run() {
        try {
            goToStation();
            waitForTaxi();
            if (passengerState == PassengerState.WatingInQueue) {
                goHome();
            } else { // already in taxi
                synchronized (this) {
                    wait();
                }
            }
        } catch (InterruptedException e) {
            e.printStackTrace();
        } finally {
            closeLogger();
        }
    }

    private void closeLogger() {
        Logger logger = getLogger();
        java.util.logging.Handler[] handlers = logger.getHandlers();
        for (java.util.logging.Handler h : handlers) {
            try {
                h.close();
            } catch (SecurityException e) {}
        }
    }
}

Answer 1

由于您使用 addHandler() 添加处理程序，干净的方法是关闭 () 然后调用 removeHandler()

See removeHandler

此外，从上面的链接复制:

After passing this initial (cheap) test, the Logger will allocate a LogRecord to describe the logging message. It will then call a Filter (if present) to do a more detailed check on whether the record should be published. If that passes it will then publish the LogRecord to its output Handlers. By default, loggers also publish to their parent's Handlers, recursively up the tree.

因此，如果您不删除处理程序，它仍将保留引用。这可能是您的文件仍处于锁定状态的原因。试试这个，让我知道它是否有效!