package com.moral.api.config.rest;
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public class Crc16Utils {
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public static String crc16_2017(String pushMsg, int usDataLen) {
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int crc_reg=0xFFFF;
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int check;
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for(int i =0; i<usDataLen;i++){
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crc_reg = (crc_reg>>8) ^ pushMsg.charAt(i);
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for(int j =0; j<8; j++){
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check = crc_reg & 0x0001;
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crc_reg >>= 1;
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if(check == 0x0001){
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crc_reg ^= 0xA001;
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}
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}
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}
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return padLeft(Integer.toHexString(crc_reg).toUpperCase(), 4, "0");
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}
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public static String padLeft(String s, int w, String pc) {
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if (pc == null) {
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pc = "0";
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}
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for (int i = 0, c = w - s.length(); i < c; i++) {
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s = pc + s;
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}
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return s;
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}
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public static String padLeftTest(String s, int w, String pc) {
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if (pc == null) {
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pc = "0";
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}
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for (int i = 0, c = w - s.length(); i < c; i++) {
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s = pc + s;
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}
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return s;
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}
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}
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