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目录

概述

809协议服务端程序

需求：

设计思路

实现思路分析

1.服务端

809协议服务端程序解码程序：

2.code:

package cn.com.onlinetool.jt809.convert;import java.math.BigInteger;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;public class StringToHex{public String convertStringToHex(String str){char[] chars = str.toCharArray();StringBuffer hex = new StringBuffer();for(int i = 0; i < chars.length; i++){hex.append(Integer.toHexString((int)chars[i]));}return hex.toString();}public String convertHexToString(String hex){StringBuilder sb = new StringBuilder();StringBuilder temp = new StringBuilder();//49204c6f7665204a617661 split into two characters 49, 20, 4c...for( int i=0; i<hex.length()-1; i+=2 ){//grab the hex in pairsString output = hex.substring(i, (i + 2));//convert hex to decimalint decimal = Integer.parseInt(output, 16);//convert the decimal to charactersb.append((char)decimal);temp.append(decimal);}return sb.toString();}//504F533838383834  POS88884public static void main(String[] args) {StringToHex strToHex = new StringToHex();
//        System.out.println("\n-----ASCII码转换为16进制 -----");
//        String str = "POS88884";
//        System.out.println("字符串: " + str);
//        String hex = strToHex.convertStringToHex(str);
//        System.out.println("转换为16进制 : " + hex);//        String hex="3132333435363738393031000000000000000000";
//        String hex="3132333435364071712E636F6D";String hex="63E5A282B2E2413838383838";System.out.println("\n***** 16进制转换为ASCII *****");System.out.println("Hex : " + hex);System.out.println("ASCII : " + strToHex.convertHexToString(hex));}public static void main2(String[] args) {String s = "000000005BAC4D50";long longVaue = new BigInteger(s, 16).longValue();Calendar c=Calendar.getInstance();c.setTimeInMillis(longVaue);DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");System.out.println(dateFormat.format(c.getTime()));}
}

拓展实现

这里参考：github:简单实现上述流程：
入门级实现:
: 部分源码实现.
: 源码实现

性能参数测试：

1.功能测试

参考资料和推荐阅读

1. 暂无

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