我正在构建一个swing应用程序,通过Internet下载多个文件并保存到windows文件共享.我已经使用了SwingWroker,它在内部使用ExecutorService,它在内部对它们进行排队并一次下载10个,但由于某种原因,下载后说2 – 3 MB的文件它会停止并转移到下一个下载文件,它们将被批量下载10个因为SwingWorker已将其固定为Executor Service的线程数.
我必须在Windows文件共享中写这些文件,我使用nio.FileChannels来做到这一点.有50-60个文件,每个重约300MB – 500MB.文件链接位于我通过互联网登录登录页面(带有帖子请求)登录的网页上,然后我在开头指定了CookieHandler.setDefault(新的CookieManager()),所以它对我来说就像一个浏览器.
另一个观察是当我在本地下载它们(而不是Windows服务器共享)时,它们确实可以正常工作.
这是我正在使用的代码
import java.io.File;
import java.io.FileOutputStream;
import java.net.URL;
import java.net.URLConnection;
import java.nio.channels.Channels;
import java.nio.channels.FileChannel;
import java.nio.channels.ReadableByteChannel;
import javax.swing.SwingWorker;
public class DownloadProcess extends SwingWorker
这是我在下载5-10分钟后得到的错误堆栈跟踪
/*
javax.net.ssl.SSLException: Connection has been shutdown: javax.net.ssl.SSLException: java.net.SocketException: Connection reset
at sun.security.ssl.SSLSocketImpl.checkEOF(Unknown Source)
at sun.security.ssl.AppInputStream.read(Unknown Source)
at java.io.BufferedInputStream.read1(Unknown Source)
at java.io.BufferedInputStream.read(Unknown Source)
at sun.net.www.MeteredStream.read(Unknown Source)
at java.io.FilterInputStream.read(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection$HttpInputStream.read(Unknown Source)
at java.nio.channels.Channels$ReadableByteChannelImpl.read(Unknown Source)
at com.objects.DownloadByteChannel.read(DownloadByteChannel.java:117)
at sun.nio.ch.FileChannelImpl.transferFromArbitraryChannel(Unknown Source)
at sun.nio.ch.FileChannelImpl.transferFrom(Unknown Source)
at com.core.DownloadTask.doInBackground(DownloadTask.java:154)
at com.core.DownloadTask.doInBackground(DownloadTask.java:59)
at com.util.ZSwingWorker$1.call(ZSwingWorker.java:286)
at java.util.concurrent.FutureTask.run(Unknown Source)
at com.util.ZSwingWorker.run(ZSwingWorker.java:325)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: javax.net.ssl.SSLException: java.net.SocketException: Connection reset
at sun.security.ssl.Alerts.getSSLException(Unknown Source)
at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
at sun.security.ssl.SSLSocketImpl.handleException(Unknown Source)
at sun.security.ssl.SSLSocketImpl.handleException(Unknown Source)
... 18 more
Caused by: java.net.SocketException: Connection reset
at java.net.SocketInputStream.read(Unknown Source)
at java.net.SocketInputStream.read(Unknown Source)
at sun.security.ssl.InputRecord.readFully(Unknown Source)
at sun.security.ssl.InputRecord.read(Unknown Source)
at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
at sun.security.ssl.SSLSocketImpl.readDataRecord(Unknown Source)
... 18 more
*/
用法：
public static void main(String[] args){
int counter = 1;
for(String url: urls){
new DownloadProcess(url,"\fileshare.serverxyz"+(counter++)+".txt").execute();
}
}
您将不得不更改连接超时服务器端.如果它们具有任何重要性,我会沿途获取一些链接：
Modify Session Security settings
Lengthening salesforce session timeout
希望这有帮助,祝你好运,让我知道:)
