java - 在 SwingWorker (doInBackground) 中从 Worker-Thread 调用多个方法？

Question

我是 Thread 新手，想要使用 SwingWorker 来更新我的 GUI，而另一个线程正在分析一些 html 并下载文件..

这是我的代码:

protected Void doInBackground() throws Exception {

    analyzeHTML();
    download();

    return null;
}

整个调用有时会失败:

   SEVERE: null
java.net.SocketTimeoutException: Read timed out
    at java.net.SocketInputStream.socketRead0(Native Method)
    at java.net.SocketInputStream.read(SocketInputStream.java:150)
    at java.net.SocketInputStream.read(SocketInputStream.java:121)
    at java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
    at java.io.BufferedInputStream.read1(BufferedInputStream.java:275)
    at java.io.BufferedInputStream.read(BufferedInputStream.java:334)
    at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:633)
    at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:579)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1322)
    at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:468)
    at org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:429)
    at org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:446)
    at org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:446)
    at org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:410)
    at org.jsoup.helper.HttpConnection.execute(HttpConnection.java:164)
    at org.jsoup.helper.HttpConnection.get(HttpConnection.java:153)
    at hanserdownloader.LinkProcessorThread.analyzeHTML(LinkProcessorThread.java:208)
    at hanserdownloader.LinkProcessorThread.doInBackground(LinkProcessorThread.java:139)
    at hanserdownloader.LinkProcessorThread.doInBackground(LinkProcessorThread.java:113)
    at javax.swing.SwingWorker$1.call(SwingWorker.java:296)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
    at java.util.concurrent.FutureTask.run(FutureTask.java:166)
    at javax.swing.SwingWorker.run(SwingWorker.java:335)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:722)

所以我的问题是:

当从 one/doInBackground() 调用这两个方法时，它们是否也在工作线程中运行。应该是吧？

似乎是一个愚蠢的问题，但我有点不安，如果这个超时错误不是真正由某些线程困惑产生的(而不是真正的http超时)..

感谢您的帮助!

Answer 1

这两个方法在工作线程中运行，但顺序运行。因此，首先在工作线程中调用 analyzeHTML，然后在完成后，在同一线程中调用 download。