摘要：
1 import java.io.BufferedInputStream; 2 import java.io.File; 3 import java.io.IOException; 4 import java.io.RandomAccessFile; 5 import java.net.URL; 6 import java.net.URLConnection; 7 8 public class DLRunnable implements Runnable { 9 static final int BUF_SIZE = 1024;10 URL url = Task.url;1... 阅读全文