Java IO流 之 DataInputStream DataOutputStream

Posted 2020-11-20 verejava

http://www.verejava.com/?id=16994690613914

package com.io2;

import java.io.*;

public class TestDataInputStream
{
    public static void main(String[] args)
    {
        OutputStream os;
        try
        {
            //向文件中 以  int ,double,boolean ,String 存入数据
            os = new FileOutputStream(new File("res/data.dat"));
            DataOutputStream dos=new DataOutputStream(os);
            dos.writeUTF("张三");
            dos.writeInt(20);
            dos.writeBoolean(true);
            dos.writeDouble(10.2);
            os.flush();//存入文件
            
            //取得数据
            InputStream is=new FileInputStream(new File("res/data.dat"));
            DataInputStream dis=new DataInputStream(is);
            //注意 取数据 的顺序  必须和存数据的一样
            System.out.println(dis.readUTF());
            System.out.println(dis.readInt());
            System.out.println(dis.readBoolean());
            System.out.println(dis.readDouble());
            
            
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
        
    }
}

http://www.verejava.com/?id=16994690613914