2023-03-04 16:29:55 +08:00
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package com.jsowell.common.util;
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import com.google.common.primitives.Bytes;
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import lombok.extern.slf4j.Slf4j;
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import java.math.BigDecimal;
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import java.util.Arrays;
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@Slf4j
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public class YKCUtils {
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private static final BigDecimal multiple = new BigDecimal("100000");
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/**
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* 校验云快充请求数据格式
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*
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* @param msg 请求报文
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* @return
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*/
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public static boolean checkMsg(byte[] msg) {
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// 起始标志
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byte[] head = BytesUtil.copyBytes(msg, 0, 1);
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// 数据长度
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byte[] length = BytesUtil.copyBytes(msg, 1, 1);
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// 序列号域
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byte[] serialNumber = BytesUtil.copyBytes(msg, 2, 2);
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// 加密标志
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byte[] encryptFlag = BytesUtil.copyBytes(msg, 4, 1);
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// 帧类型标志
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byte[] frameType = BytesUtil.copyBytes(msg, 5, 1);
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// 消息体
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byte[] msgBody = BytesUtil.copyBytes(msg, 6, msg.length - 8);
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// 帧校验域
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byte[] crcByte = new byte[]{msg[msg.length - 2], msg[msg.length - 1]};
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//起始位必须是0x68
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if (0x68 != head[0]) {
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log.error("起始位必须是0x68");
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return false;
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}
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// 序列号域+加密标志+帧类型标志+消息体
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byte[] data = Bytes.concat(serialNumber, encryptFlag, frameType, msgBody);
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// 校验长度
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if (data.length != BytesUtil.bytesToIntLittle(length)) {
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log.error("数据长度不正确");
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return false;
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}
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// CRC校验 source target
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String sourceCRC = String.format("%04x", BytesUtil.bytesToInt(crcByte, 0));
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String targetCRC = String.format("%04x", CRC16Util.calcCrc16(data));
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String oldTargetCRC = String.format("%04x", CRC16Util.calcCrc16Old(data));
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if (!sourceCRC.equalsIgnoreCase(targetCRC)) {
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log.error("CRC校验不通过, 源crc:{}, 计算得出crc:{}, 老crc计算:{}, 帧类型:{}, 报文:{}, msg:{}"
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, sourceCRC, targetCRC, oldTargetCRC, YKCUtils.frameType2Str(frameType), BytesUtil.binary(msg, 16), Arrays.toString(msg));
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return false;
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}
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return true;
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}
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/**
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* 转换电压电流以及起始soc
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* 精确到小数点后一位;待机置零
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*
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* @param bytes
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* @return
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*/
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public static String convertVoltageCurrent(byte[] bytes) {
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// 转换为int 最后一位是小数位
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int i = BytesUtil.bytesToIntLittle(bytes);
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// 使用BigDecimal
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BigDecimal bigDecimal = new BigDecimal(i);
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BigDecimal divide = bigDecimal.divide(new BigDecimal(10), 1, BigDecimal.ROUND_UP);
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return divide.toString();
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}
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/**
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* 转换小数点
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*
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* @param bytes
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* @param scale 小数位
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* @return
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*/
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public static String convertDecimalPoint(byte[] bytes, int scale) {
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// 转换为int
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int i = BytesUtil.bytesToIntLittle(bytes);
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// 使用BigDecimal
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BigDecimal bigDecimal = new BigDecimal(i);
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BigDecimal divide = bigDecimal.divide(BigDecimal.valueOf(Math.pow(10d, scale)), scale, BigDecimal.ROUND_UP);
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return divide.toString();
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}
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/**
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* 获取价格byte数组
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* 价格转换为byte数组
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* @param price 实际价格,单位元
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* @param scale 保留小数位
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* @return
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*/
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public static byte[] getPriceByte(String price, int scale) {
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// 保留小数位 例:保留5位小数,需要乘以10的5次方
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BigDecimal value = BigDecimal.valueOf(Math.pow(10d, scale));
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int i = new BigDecimal(price).multiply(value).intValue();
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return BytesUtil.intToBytesLittle(i, 4);
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}
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/**
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* byte转帧类型字符串
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* @param bytes
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* @return
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*/
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public static String frameType2Str(byte[] bytes) {
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String s = BytesUtil.bin2HexStr(bytes);
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return "0x" + s;
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}
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public static void main(String[] args) {
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// String hexString = "681E0000003388000000000027012302081602434533880000000000270101008361";
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// byte[] byteArray = new byte[hexString.length() / 2];
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// for (int i = 0; i < byteArray.length; i++) {
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// int index = i * 2;
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// int j = Integer.parseInt(hexString.substring(index, index + 2), 16);
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// byteArray[i] = (byte) j;
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// }
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// System.out.println(byteArray);
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// String binary = BytesUtil.binary(byteArray, 16);
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// String aaa = DatatypeConverter.printHexBinary(byteArray);
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// System.out.println(binary);
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// System.out.println(aaa);
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2023-03-27 11:49:32 +08:00
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String hexString = "4f";
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byte[] bytes = new byte[]{0x4f};
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2023-03-04 16:29:55 +08:00
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2023-03-27 11:49:32 +08:00
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String s = transitionTemperature(bytes);
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System.out.println(s);
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2023-04-24 13:55:33 +08:00
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byte[] bytess = new byte[]{(byte) 0x80, (byte) 0x1A, 0x06, 0x00};
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String s1 = convertDecimalPoint(bytess, 5);
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System.out.println(s1);
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2023-05-31 15:24:18 +08:00
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String amount = "1000";
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byte[] priceByte = getPriceByte(amount, 2);
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System.out.println(BytesUtil.bin2HexStr(priceByte));
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2023-03-27 11:49:32 +08:00
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}
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/**
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* 转换温度
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* BIN 码 1 整形,偏移量-50;待机置零
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*/
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public static String transitionTemperature(byte[] bytes) {
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String s = BytesUtil.binary(bytes, 10);
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int i = Integer.parseInt(s);
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2023-03-27 17:03:28 +08:00
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if (i > 0) {
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return String.valueOf(i - 50);
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}
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return "一";
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2023-03-04 16:29:55 +08:00
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}
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}
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