如何将一个文件复制到另一个文件？

解决方法

这个例子显示了如何使用BufferedWriter类的read & write 方法将一个文件的内容复制到另一个文件。

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();
   }
}

结果

上面的代码示例将产生以下结果。

string to be copied