6、数据流

package Io;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public class TestWriteNumber_Io {
    public static void main(String[] args) {
        FileOutputStream fos = null;
        DataOutputStream dos = null;
        FileInputStream fis = null;
        DataInputStream dis = null;

        try {
            fos = new FileOutputStream("C:\\Users\\Samuel\\Pictures\\abc.dat");
            // 如果希望存储基本数据类型就用DataOutputStream,也是过滤流
            dos = new DataOutputStream(fos);
            dos.writeInt(11231231);
            dos.writeInt(2);
            dos.writeInt(3);
            dos.writeInt(4);
            fis = new FileInputStream("C:\\Users\\Samuel\\Pictures\\abc.dat");
            // 从文件读取数据用DataInputStream，同样是过滤流 
            dis = new DataInputStream(fis);
//            dis = new DataInputStream(new FileInputStream("C:\\Users\\Samuel\\Pictures\\abc.dat"));
            System.out.println(dis.readInt());
            System.out.println(dis.readInt());
            System.out.println(dis.readInt());
            System.out.println(dis.readInt());
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (dos != null)
                try {
                    dos.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
        }
    }
}