写入二进制流

import java.io.BufferedOutputStream;

import java.io.DataOutputStream;

import java.io.File;
/** 
来 自 
nowjava.com
**/

import java.io.FileOutputStream;

import java.io.IOException;


public class WriteBinaryFile {

  public static void main(String[] args) {

    Movie[] movies = getMovies();

    DataOutputStream out = openOutputStream("movies.dat");

    for (Movie m : movies)

      writeMovie(m, out);

    closeFile(out);

  }

  /*
   from N o w  J a v a  . c o m 
  */

  private static Movie[] getMovies() {

    Movie[] movies = new Movie[10];

    movies[0] = new Movie("It's a Wonderful Life", 1946, 14.95);

    movies[1] = new Movie("Star Wars", 1977, 17.95);

    movies[2] = new Movie("Star Wars 7", 2018, 17.95);

    return movies;

  }


  private static DataOutputStream openOutputStream(String name) {

    DataOutputStream out = null;

    try {

      File file = new File(name);

      out = new DataOutputStream(new BufferedOutputStream(new FileOutputStream(file)));

      return out;

    } catch (IOException e) {

      System.out.println("I/O Exception opening file.");

      System.exit(0);

    }

    return out;

  }


  private static void writeMovie(Movie m, DataOutputStream out) {

    try {

      out.writeUTF(m.title);

      out.writeInt(m.year);

      out.writeDouble(m.price);

    } catch (IOException e) {

      System.out.println("I/O Exception writing data.");

      System.exit(0);

    }

  }


  private static void closeFile(DataOutputStream out) {

    try {

      out.close();

    } catch (IOException e) {

      System.out.println("I/O Exception closing file.");

      System.exit(0);

    }

  }


}