java 复制文件的方法

1060阅读　0评论2014-12-30　dehuai
分类：LINUX

使用文件通道的方法进行文件复制

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  1. public void fileChannelCopy(File s, File t) {

  3.         FileInputStream fi = null;

  5.         FileOutputStream fo = null;

  7.         FileChannel in = null;

  9.         FileChannel out = null;

  11.         try {

  13.             fi = new FileInputStream(s);

  15.             fo = new FileOutputStream(t);

  17.             in = fi.getChannel();//得到对应的文件通道

  19.             out = fo.getChannel();//得到对应的文件通道

  21.             in.transferTo(0, in.size(), out);//连接两个通道，并且从in通道读取，然后写入out通道

  23.         } catch (IOException e) {

  25.             e.printStackTrace();

  27.         } finally {

  29.             try {

  31.                 fi.close();

  33.                 in.close();

  35.                 fo.close();

  37.                 out.close();

  39.             } catch (IOException e) {

  41.                 e.printStackTrace();

  43.             }

  45.         }

  47.     }

以文件缓冲区的方式进行文件复制

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  1. private boolean copyFile (String fileFrom, String fileTo) {
  2.         try {
  3.             FileInputStream in = new java.io.FileInputStream(fileFrom);
  4.             FileOutputStream out = new FileOutputStream(fileTo);
  5.             byte[] bt = new byte[1024];
  6.             int count;
  7.             while ((count = in.read(bt)) > 0) {
  8.                 out.write(bt, 0, count);
  9.             }
  10.             in.close();
  11.             out.close();
  12.             return true;
  13.         } catch (IOException ex) {
  14.             return false;
  15.         }
  16.     }


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