java实现CRC16算法与C算法一致

雨点打透心脏的1/2处 2022-08-24 11:51 175阅读 0赞

java实现CRC16算法与C算法一致

public class CRC16 {
    	private char[] crc_tb = { 0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7, 0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce,
    			0xf1ef, 0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6, 0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
    			0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485, 0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d, 0x3653,
    			0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4, 0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc, 0x48c4, 0x58e5,
    			0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823, 0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b, 0x5af5, 0x4ad4, 0x7ab7,
    			0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12, 0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a, 0x6ca6, 0x7c87, 0x4ce4, 0x5cc5,
    			0x2c22, 0x3c03, 0x0c60, 0x1c41, 0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49, 0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13,
    			0x2e32, 0x1e51, 0x0e70, 0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78, 0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d,
    			0xf14e, 0xe16f, 0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067, 0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f,
    			0xf35e, 0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256, 0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
    			0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405, 0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c, 0x26d3,
    			0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634, 0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab, 0x5844, 0x4865,
    			0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3, 0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a, 0x4a75, 0x5a54, 0x6a37,
    			0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92, 0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9, 0x7c26, 0x6c07, 0x5c64, 0x4c45,
    			0x3ca2, 0x2c83, 0x1ce0, 0x0cc1, 0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8, 0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93,
    			0x3eb2, 0x0ed1, 0x1ef0 };
    
    	public char caluCRC(byte[] pByte) {
    		int len = pByte.length;
    		char crc;
    		byte da;
    		crc = 0x0;
    		int i = 0;
    		while (len-- != 0) {
    			da = (byte) (crc / 256);
    			crc <<= 8;
    			int num = da ^ pByte[i];
    			//System.out.println("the num is: " + num);
    			if (num < 0)
    				num += 256;
    			crc ^= crc_tb[num];
    			++i;
    		}
    		return crc;
    	}
    
    	public String getCRC16(String str) {
    		byte[] test = str.getBytes();
    		char ch = caluCRC(test);
    		int i = (int) ch;
    		String str_crc16 = Integer.toHexString(i);
    		int cu_length=4-str_crc16.length();
    		//4\3\2\1
    		if (cu_length>0&&cu_length<=4) {
    			for (int j = 0; j <cu_length; j++) {
    				str_crc16="0"+str_crc16;
    			}
    		}
    		System.out.println("CRC十六进制字符串是:" + str_crc16);
    		return str_crc16;
    	}
    
    	public static void main(String[] args) {
    		CRC16 crc = new CRC16();
    		// aa 01 d0 08 7e 0f 00 00 00 3f 0d bb
    		// aa 01 d0 04 7d de 70 bb
    		// int[] test = { 0x01, 0xd0, 0x08, 0x7e, 0x0f, 0x00, 0x00, 0x00};
    		// aa 01 d0 04 7c ff 60 bb
    		byte[] test = "SWORK:1#".getBytes();
    		char ch = crc.caluCRC(test);
    		// 以下是为了测试方便进行的处理，因为char数据类型很多是不可显示的
    		int i = (int) ch;
    		String str = Integer.toHexString(i);
    		System.out.println("CRC十六进制字符串是:" + str);
    		System.out.println("CRC整数类型的数据是:" + i);
    	}
    }