source/mir/util/FileCopier.java

   1 package mir.util;
   2
   3 import java.io.File;
   4 import java.io.FileInputStream;
   5 import java.io.FileOutputStream;
   6 import java.io.IOException;
   7
   8 public class FileCopier {
   9   protected static final int FILE_COPY_BUFFER_SIZE = 65536;
  10
  11   protected FileCopier() {
  12   }
  13
  14   public static void copyFile(File aSourceFile, File aDestinationFile) throws IOException {
  15     FileInputStream inputStream;
  16     FileOutputStream outputStream;
  17     int nrBytesRead;
  18     byte[] buffer = new byte[FILE_COPY_BUFFER_SIZE];
  19
  20     inputStream = new FileInputStream(aSourceFile);
  21     try {
  22       File directory = new File(aDestinationFile.getParent());
  23         if (directory!=null && !directory.exists()){
  24           directory.mkdirs();
  25       }
  26       outputStream = new FileOutputStream(aDestinationFile);
  27       try {
  28         do {
  29           nrBytesRead = inputStream.read(buffer);
  30           if (nrBytesRead>0)
  31             outputStream.write(buffer, 0, nrBytesRead);
  32         }
  33         while (nrBytesRead>=0);
  34       }
  35       finally {
  36         outputStream.close();
  37       }
  38     }
  39     finally {
  40       inputStream.close();
  41     }
  42   }
  43
  44   public static void copyDirectory(File aSourceDirectory, File aDestinationDirectory) throws IOException {
  45     int i;
  46     File sourceFile;
  47     File destinationFile;
  48     File[] files = aSourceDirectory.listFiles();
  49
  50     if (!aDestinationDirectory.exists())
  51       aDestinationDirectory.mkdirs();
  52
  53     for (i=0; i<files.length; i++) {
  54       sourceFile = files[i];
  55       destinationFile=new File(aDestinationDirectory, sourceFile.getName());
  56       if (sourceFile.isDirectory()) {
  57         if (!destinationFile.exists())
  58           destinationFile.mkdir();
  59         copyDirectory(sourceFile, destinationFile);
  60       }
  61       else {
  62         copyFile(sourceFile, destinationFile);
  63       }
  64     }
  65   }
  66
  67   public static void copy(File aSource, File aDestination) throws IOException {
  68     if (aSource.isDirectory()) {
  69       copyDirectory(aSource, aDestination);
  70     }
  71     else if (aDestination.isDirectory()) {
  72       copyFile(aSource, new File(aDestination, aSource.getName()));
  73     }
  74     else {
  75       copyFile(aSource, aDestination);
  76     }
  77   }
  78
  79 }