如何將一個文件複製到另一個文件？

解決方法

這個例子顯示了如何使用BufferedWriter類的read & write 方法將一個文件的內容複製到另一個文件。

import java.io.*;

public class Main {
   public static void main(String[] args) 
   throws Exception {
      BufferedWriter out1 = new BufferedWriter
      (new FileWriter("srcfile"));
      out1.write("string to be copied
");
      out1.close();
      InputStream in = new FileInputStream
      (new File("srcfile"));
      OutputStream out = new FileOutputStream
      (new File("destnfile"));
      byte[] buf = new byte[1024];
      int len;
      while ((len = in.read(buf)) > 0) {
         out.write(buf, 0, len);
      }
      in.close();
      out.close();
      BufferedReader in1 = new BufferedReader
      (new FileReader("destnfile"));
      String str;
      while ((str = in1.readLine()) != null) {
         System.out.println(str);
      }
      in.close();
   }
}

結果

上麵的代碼示例將產生以下結果。

string to be copied