数据流:将基本类型数据和字符串类型数据写入到磁盘

package org.lanqiao.io;

import java.io.BufferedInputStream;

import java.io.BufferedOutputStream;

import java.io.DataInputStream;

import java.io.DataOutputStream;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

public class IOTest4 {

/**

* 数据流:将基本类型数据和字符串类型数据写入到磁盘;

* @throws IOException 

*/

public static void main(String[] args) throws IOException {

String path = "src/docs/data.lanqiao";

InputStream in = new FileInputStream(path);

BufferedInputStream bf =new BufferedInputStream(in);

DataInputStream dis =new DataInputStream(bf);

int num1 =  dis.readInt();

double d1 = dis.readDouble();

String s = dis.readUTF();

dis.close();

bf.close();

in.close();

System.out.println("num1--->" + num1);

System.out.println("d1 -->" + d1);

System.out.println("s --> " + s);

}

private static void writer() throws IOException{

String file = "src/docs/data.lanqiao";

int i = 100;

double d = 10.10;

String str = "hello,world";

//字节输出流;

OutputStream out = new FileOutputStream(file);

//字节缓冲流;

BufferedOutputStream buffer = new BufferedOutputStream(out);

DataOutputStream dos = new DataOutputStream(buffer);

dos.writeInt(i);

dos.writeDouble(d);

dos.writeUTF(str);

dos.close();

buffer.close();

out.close();

}

}