IO style

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IO stream overview

Java Io flow involves more than 40 classes. These classes look messy, but they are actually very regular, and there is a very close relationship between them. The more than 40 classes of Java Io flow are derived from the following 4 abstract classes derived from the base class.

InputStream/Reader: 所有的输入流的基类，前者是字节输入流，后者是字符输入流。
OutputStream/Writer: 所有输出流的基类，前者是字节输出流，后者是字符输出流。

/**
     * IO流概述
     *  可以将这种数据传输操作,看做一种数据的流动 , 按照流动的方向分为输入Input和输出Output
     *  Java中的IO操作主要指的是 java.io包下的一些常用类的使用. 通过这些常用类对数据进行读取(输入Input) 和 写出(输出Output)
     *
     * IO流的分类:
     *  按照流的方向来分,可以分为:输入流和输出流.
     *  按照流动的数据类型来分,可以分为:字节流和字符流
     *
     *     字节流:
     *          -   输入流 :   InputStream
     *          -   输出流 :   OutputStream
     *     字符流:
     *          -   输入流 :   Reader
     *          -   输出流 :   Writer
     *
     *
     * 一切皆字节:
     *      计算机中的任何数据(文本,图片,视频,音乐等等)都是以二进制的形式存储的.
     *      在数据传输时 也都是以二进制的形式存储的.
     *      后续学习的任何流 , 在传输时底层都是二进制.
     * @param args
     */

Classification of IO streams

According to the different types of processing data, it is divided into: character stream and byte stream
According to the data flow direction, it is divided into: input stream and output stream

byte stream

Carousel: Byte Stream

character stream

Carousel: Character Stream

byte-to-character stream

package work.february.two.daily;

import java.io.*;

/**
 * @Author: 小浪
 * @Description:
 * @Date Created in 2021-02-02 20:37
 * @Modified By:
 */
public class Demo11 {
    
    
    public static void main(String[] args) throws IOException {
    
    
        //转化流 字节转字符
        FileInputStream fileInputStream =new FileInputStream("D://d.txt");
        InputStreamReader inputStreamReader =new InputStreamReader(fileInputStream,"utf-8");
        while (true){
    
    
            int c = inputStreamReader.read();
            if(c==-1){
    
    
                break;
            }
            System.out.println((char)c);

        }

    }
}

package work.february.two.daily;

import java.io.*;

/**
 * @Author: 小浪
 * @Description:
 * @Date Created in 2021-02-02 20:44
 * @Modified By:
 */
public class Demo12 {
    
    
    public static void main(String[] args) throws IOException {
    
    
        FileOutputStream fileOutputStream =new FileOutputStream("D://c.txt");
        OutputStreamWriter outputStreamWriter =new OutputStreamWriter(fileOutputStream);
        outputStreamWriter.write("场子要货");
        outputStreamWriter.flush();
        outputStreamWriter.close();
    }
}

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Bullshit time:

If the guest officer thinks it is suitable to eat, can you give a free like! Thank you! Slow down guest officer! It is recommended to pack and collect, and come back next time. The shop's second QQ: 309021573, welcome to harass!

I am an IO stream, I am a ruthless machine!