字符流

package com.czie.iot1913.lps.IO.InPutStream;

import java.util.Arrays;

/**
 * FileName: FileInPutStream03
 * Author:   lps
 * Date:     2022/3/26 11:56
 * Sign:刘品水 Q：1944900433
 * <p>
 * 一个汉字存储如果是gbk编码是两个字节
 * 如果utf—8是3个字节
 */
public class FileInPutStream03 {
    public static void main(String[] args) throws Exception {
//        FileInputStream fis = new FileInputStream("F:\\JavaCode\\fos.txt");
//        int by;
//        while ((by=fis.read())!=-1){
//            System.out.print((char) by);
//        }
        //hello
        //world
        //刘品水


//        FileInputStream fis = new FileInputStream("F:\\JavaCode\\fos.txt");
//        byte[] bys = new byte[1024];
//        int len;
//        while ((len=fis.read(bys))!=-1){
//            System.out.println(new String(bys,0,len));
//        }
        //hello
        //world
        //刘品水
        //String s="abc";//[97, 98, 99]
        String s = "中国";//[-28, -72, -83, -27, -101, -67]
        //    byte[] bys = s.getBytes();
        //   byte[] bys = s.getBytes(StandardCharsets.UTF_8);//[-28, -72, -83, -27, -101, -67]
        byte[] bys = s.getBytes("GBK");//[-42, -48, -71, -6]
        System.out.println(Arrays.toString(bys));
        
        //字符流=字节流+编码表
//UTF-8是三位 GBK是两位
　　　　

        //fis.close();

    }
}

package com.czie.iot1913.lps.IO.InPutStream;

import java.io.UnsupportedEncodingException;
import java.nio.charset.StandardCharsets;
import java.util.Arrays;

/**
 * FileName: StringDemo
 * Author:   lps
 * Date:     2022/3/26 12:39
 * Sign:刘品水 Q：1944900433
 */
public class StringDemo {
    public static void main(String[] args) throws UnsupportedEncodingException {
        String s = "中国";
        byte[] bys00 = s.getBytes();
        System.out.println(Arrays.toString(bys00));

        byte[] bys01 = s.getBytes(StandardCharsets.UTF_8);
        System.out.println(Arrays.toString(bys01));

        byte[] bys02 = s.getBytes("GBK");
        System.out.println(Arrays.toString(bys02));

        String ss=new String(bys00,"UTF-8");
        System.out.println(ss);

        String ss00=new String(bys01);
        System.out.println(ss00);

        String ss01=new String(bys02,"GBK");
        //涓浗
        System.out.println(ss01);



    }
}