The conversion time of 16 hexadecimal string or little endian byte hexadecimal data

1. String type conversion time

  1> String type time to type Date time

  2> is converted into time stamp

  3> is converted into a hexadecimal character string stamp

  4> 16 hexadecimal string into a byte hexadecimal little-endian mode data

2. Date type time conversion

  1> is converted to the time stamp

  2> stamp is converted to a hexadecimal character string

  3> 16 hexadecimal string into a byte hexadecimal little-endian mode data

Finishing Code:

package cn.xxs.dateDemo;

import java.lang.reflect.Array;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Arrays;
import java.util.Date;

public class DateChange {
	public static void main(String[] args) {
		System.out.println(Arrays.toString(dateToStamp("2019-11-11 13:00:00")));
		System.out.println(Arrays.toString(dateToStamp(new Date())));
		
	}
	
	/* 
     * 时间->时间戳->十六进制->小端模式byte数组
     */    
    public static byte[] dateToStamp(String time){
        String stap = null;
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        java.util.Date date;
		try {
			date = simpleDateFormat.parse(time);
			long ts = date.getTime()/1000;//获取时间的时间戳
	        stap = Long.toHexString(ts);//十六进制
	        
	        System.out.println("16进制字符串："+stap);
		} catch (ParseException e) {		
			e.printStackTrace();
		}   
		String code0 = stap.substring(0, 2);
		String code1 = stap.substring(2, 4);
		String code2 = stap.substring(4, 6);
		String code3 = stap.substring(6, 8);
        byte[] timeByte = {(byte) getCode(code3),(byte) getCode(code2),(byte) getCode(code1),(byte) getCode(code0)};
        return timeByte;
    }
    
    /* 
     * 时间->时间戳->十六进制->小端模式byte数组
     */    
    public static byte[] dateToStamp(Date date){
    	String stap = null;
        long ts = date.getTime()/1000;//获取时间的时间戳
        stap = Long.toHexString(ts);//十六进制
        System.out.println("16进制字符串："+stap);
        
        String code0 = stap.substring(0, 2);
		String code1 = stap.substring(2, 4);
		String code2 = stap.substring(4, 6);
		String code3 = stap.substring(6, 8);
        byte[] timeByte = {(byte) getCode(code3),(byte) getCode(code2),(byte) getCode(code1),(byte) getCode(code0)};
        return timeByte;
    }

    
    /**
	 * 将截取16进制两个字节字符串转换为byte类型
	 * @param str
	 * @return
	 */
	public static int getCode(String str){ 
		int h = Integer.parseInt(str.substring(0,1),16);
		int l = Integer.parseInt(str.substring(1,2),16);
//		byte H = (byte) h;	
//		byte L = (byte) l;	
//		int s = H<<4 | L;
		byte s = (byte) (((byte)h<<4) + (byte) l);		
		return s;		
	}
}

 

Test results: