如何通过得到的URL或InputStream对象获得FileOutputStream对象？

Question

给你一段程序让你参考一下import java.io.*;public class IOStreamDemo {
  public static void main(String[] args) {
    try {
      // 1. Buffered input file
      DataInputStream in =
        new DataInputStream(
          new BufferedInputStream(
            new FileInputStream(args[0])));
      String s, s2 = new String();
      while((s = in.readLine())!= null)
        s2 += s + "\n";
      in.close();      // 2. Input from memory
      StringBufferInputStream in2 =
          new StringBufferInputStream(s2);
      int c;
      while((c = in2.read()) != -1)
        System.out.print((char)c);
}
catch(IOException e) {
      System.out.println("IO Exception");
    }
}

Answer 1

java.net.URL url;
        FileOutputStream f = new FileOutputStream(new File(url.getFile()));