利用 Java 複製與删除檔案及目錄 (Use Java to copy and delete a file or a directory)

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import java.io.File; import java.io.IOException; import java.io.FileNotFoundException; import java.io.FileInputStream; import java.io.FileOutputStream; import java.util.Arrays;

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public static void copy(File source, File destination) throws IOException, FileNotFoundException{     if (source. exists() && !source.equals(destination)){         if (source.isFile()){             FileInputStream fis = new FileInputStream(source);             FileOutputStream fos = new FileOutputStream(destination);             byte[] buffer = new byte[1024];             for (int length; (length = fis.read(buffer)) > 0; fos.write(buffer, 0, length));             fos.close();             fis.close();         } else if (source.isDirectory()){             if (!destination.exists()){                 destination.mkdir();             }             File[] files = source.listFiles();             for (File file : files){                 copy(file, new File(destination, file.getName()));             }         }     } }   public static void delete(File file) throws IOException, FileNotFoundException{     if (file.exists()){         if (file.isDirectory()){             File[] files = file.listFiles();             for (File f : files){                 delete(f);             }         }         file.delete();     } }