的Java複製文件強行

Question

我有複製文件的方法：

private static void copy(final String source, final String destination) { 
    try { 
     final File f1 = new File(source); 
     final File f2 = new File(destination); 
     final InputStream in = new FileInputStream(f1); 
     final OutputStream out = new FileOutputStream(f2); 
     final byte[] buf = new byte[1024]; 
     int len; 
     while ((len = in.read(buf)) > 0) { 
      out.write(buf, 0, len); 
     } 
     in.close(); 
     out.close(); 
    } catch (final FileNotFoundException ignored) { 
    } catch (final IOException ignored) {} 
} 

有沒有辦法複製到目錄時，我可以覆蓋「訪問被拒絕」的錯誤？

注：我只需要這個Windows電腦。

Answer 1

否。如果您使用的是UNIX，則需要以具有該目錄寫入權限的用戶身份運行該程序。只是好奇，你爲什麼要重寫文件系統權限？爲什麼不使用適當的權限？

Answer 2

perm = new java.io.FilePermission（「/ tmp/abc.txt」，「read」）; 希望這會回答你的問題

http://docs.oracle.com/javase/7/docs/technotes/guides/security/permissions.html

Answer 3

public static void copyFile(File source, File dest) throws IOException { 
    FileChannel inputChannel = null; 
    FileChannel outputChannel = null; 

    try { 
     inputChannel = new FileInputStream(source).getChannel(); 
     outputChannel = new FileOutputStream(dest).getChannel(); 
     outputChannel.transferFrom(inputChannel, 0, inputChannel.size()); 
    } finally { 
     inputChannel.close(); 
     outputChannel.close(); 
    } 
}