1 package Io; 2  3 import java.io.DataInputStream; 4 import java.io.DataOutputStream; 5 import java.io.FileInputStream; 6 import java.io.FileNotFoundException; 7 import java.io.FileOutputStream; 8 import java.io.IOException; 9 10 public class TestWriteNumber_Io {11     public static void main(String[] args) {12         FileOutputStream fos = null;13         DataOutputStream dos = null;14         FileInputStream fis = null;15         DataInputStream dis = null;16 17         try {18             fos = new FileOutputStream("C:\\Users\\Samuel\\Pictures\\abc.dat");19             // 如果希望存储基本数据类型就用DataOutputStream,也是过滤流20             dos = new DataOutputStream(fos);21             dos.writeInt(11231231);22             dos.writeInt(2);23             dos.writeInt(3);24             dos.writeInt(4);25             fis = new FileInputStream("C:\\Users\\Samuel\\Pictures\\abc.dat");26             // 从文件读取数据用DataInputStream，同样是过滤流 27             dis = new DataInputStream(fis);28 //            dis = new DataInputStream(new FileInputStream("C:\\Users\\Samuel\\Pictures\\abc.dat"));29             System.out.println(dis.readInt());30             System.out.println(dis.readInt());31             System.out.println(dis.readInt());32             System.out.println(dis.readInt());33         } catch (FileNotFoundException e) {34             e.printStackTrace();35         } catch (IOException e) {36             e.printStackTrace();37         } finally {38             if (dos != null)39                 try {40                     dos.close();41                 } catch (IOException e) {42                     // TODO Auto-generated catch block43                     e.printStackTrace();44                 }45         }46     }47 }