Java 实例 - 将文件内容复制到另一个文件

Java 实例

以下实例演示了使用 BufferedWriter 类的 read 和 write 方法将文件内容复制到另一个文件:

/*
 author by phpcodeweb.com
 Main.java
 */
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\n");
      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);
      }
      in1.close();
   }
}

以上代码运行输出结果为:

string to be copied

Java 实例