| | |
| | | |
| | | |
| | | public class ByteUtil { |
| | | |
| | | |
| | | /** |
| | | * 将字节数组分割 |
| | | * @param bytes 被分割数组 |
| | | * @param fromIndex 分割起始位置 |
| | | * @param len 分割长度 |
| | | * @return 返回 分割出来的数组 |
| | | */ |
| | | public static byte[] bytesSplit(byte[] bytes, int fromIndex, int len){ |
| | | if(bytes == null){ |
| | | return null ; |
| | | }else{ |
| | | byte[] bs = new byte[len] ; |
| | | if(fromIndex + len > bytes.length){ |
| | | System.arraycopy(bytes, fromIndex, bs, 0, bytes.length - fromIndex) ; |
| | | }else{ |
| | | System.arraycopy(bytes, fromIndex, bs, 0, len) ; |
| | | } |
| | | return bs ; |
| | | } |
| | | } |
| | | /** |
| | | * 将字节数组分割 |
| | | * @param bytes 被分割数组 |
| | | * @param fromIndex 分割起始位置 |
| | | * @param len 分割长度 |
| | | * @return 返回 分割出来的数组 |
| | | */ |
| | | public static Object[] bytesSplit_(byte[] bytes, int fromIndex, int len){ |
| | | if(bytes == null){ |
| | | return null ; |
| | | }else{ |
| | | int realLen = len ; |
| | | byte[] bs = new byte[len] ; |
| | | if(fromIndex + len > bytes.length){ |
| | | System.arraycopy(bytes, fromIndex, bs, 0, bytes.length - fromIndex) ; |
| | | realLen = bytes.length - fromIndex ; |
| | | }else{ |
| | | System.arraycopy(bytes, fromIndex, bs, 0, len) ; |
| | | } |
| | | return new Object[]{bs, realLen} ; |
| | | } |
| | | } |
| | | |
| | | /** |
| | | * 将字节数组合并到字节数组上 |
| | | * @param bGroup1 被合并数组 |
| | |
| | | long l = 0; |
| | | long[] ls = new long[len] ; |
| | | for(int i = 0 ; i < len; i++){ |
| | | ls[i] = bs[i] ; |
| | | ls[i] = bs[i] & 0xFF ; |
| | | } |
| | | for(int i = len-1 ; i >= 0; i--){ |
| | | ls[(len - 1) - i] <<= 8 * i ; |
| | |
| | | boolean b = isOutOfArrLength(bs.length, (from - 1) + 8); |
| | | if (b) { |
| | | long s = 0; |
| | | long s0 = bs[from + 0] ;// 最低位 |
| | | long s1 = bs[from + 1] ; |
| | | long s2 = bs[from + 2] ; |
| | | long s3 = bs[from + 3] ; |
| | | long s4 = bs[from + 4] ; |
| | | long s5 = bs[from + 5] ; |
| | | long s6 = bs[from + 6] ; |
| | | long s7 = bs[from + 7] ; |
| | | long s0 = bs[from + 0] & 0xFF ;// 最低位 |
| | | long s1 = bs[from + 1] & 0xFF ; |
| | | long s2 = bs[from + 2] & 0xFF ; |
| | | long s3 = bs[from + 3] & 0xFF ; |
| | | long s4 = bs[from + 4] & 0xFF ; |
| | | long s5 = bs[from + 5] & 0xFF ; |
| | | long s6 = bs[from + 6] & 0xFF ; |
| | | long s7 = bs[from + 7] & 0xFF ; |
| | | |
| | | // s7不变 |
| | | s6 <<= 8; |
| | |
| | | short len = (short)(end - from + 1) ; |
| | | long[] ls = new long[len] ; |
| | | for(short i = 0 ; i < len; i++){ |
| | | ls[i] = bs[from + i] ; |
| | | ls[i] = bs[from + i] & 0xFF ; |
| | | } |
| | | for(short i = (short)(len-1) ; i >= 0; i--){ |
| | | ls[i] <<= 8 * (len - (i + 1)) ; |
| | |
| | | long l = 0; |
| | | long[] ls = new long[len] ; |
| | | for(int i = 0 ; i < len; i++){ |
| | | ls[i] = bs[i] ; |
| | | ls[i] = bs[i] & 0xFF ; |
| | | } |
| | | for(int i = 0 ; i < len; i++){ |
| | | ls[(len - 1) - i] <<= 8 * i ; |
| | |
| | | boolean b = isOutOfArrLength(bs.length, (from - 1) + 8); |
| | | if (b) { |
| | | long s = 0; |
| | | long s0 = bs[from] ;// 最低位 |
| | | long s1 = bs[from + 1] ; |
| | | long s2 = bs[from + 2] ; |
| | | long s3 = bs[from + 3] ; |
| | | long s4 = bs[from + 4] ; |
| | | long s5 = bs[from + 5] ; |
| | | long s6 = bs[from + 6] ; |
| | | long s7 = bs[from + 7] ; |
| | | long s0 = bs[from] & 0xFF ;// 最低位 |
| | | long s1 = bs[from + 1] & 0xFF ; |
| | | long s2 = bs[from + 2] & 0xFF ; |
| | | long s3 = bs[from + 3] & 0xFF ; |
| | | long s4 = bs[from + 4] & 0xFF ; |
| | | long s5 = bs[from + 5] & 0xFF ; |
| | | long s6 = bs[from + 6] & 0xFF ; |
| | | long s7 = bs[from + 7] & 0xFF ; |
| | | |
| | | // s0不变 |
| | | s1 <<= 8; |
| | |
| | | short len = (short)(end - from + 1) ; |
| | | long[] ls = new long[len] ; |
| | | for(short i = 0 ; i < len; i++){ |
| | | ls[i] = bs[from + i] ; |
| | | ls[i] = bs[from + i] & 0xFF ; |
| | | } |
| | | for(short i = 0 ; i < len; i++){ |
| | | ls[i] <<= 8 * i ; |
| | |
| | | for (int i = 0; i < 4; i++) { |
| | | bs[from + i] = Integer.valueOf(value & 0xff).byteValue();// 将最低位保存在低字节 |
| | | value = value >> 8; // 向右移8位 |
| | | if(value == 0){ |
| | | break ; |
| | | } |
| | | if(value == 0){ |
| | | break ; |
| | | } |
| | | } |
| | | } else { |
| | | throw new Exception("int2Bytes时数组越界"); |
| | |
| | | boolean b = isOutOfArrLength(bs.length, (from - 1) + 4); |
| | | if (b) { |
| | | int s = 0; |
| | | int s0 = bs[from + 0] ;// 最低位 |
| | | int s1 = bs[from + 1] ; |
| | | int s2 = bs[from + 2] ; |
| | | int s3 = bs[from + 3] ; |
| | | int s0 = bs[from + 0] & 0xFF ;// 最低位 |
| | | int s1 = bs[from + 1] & 0xFF ; |
| | | int s2 = bs[from + 2] & 0xFF ; |
| | | int s3 = bs[from + 3] & 0xFF ; |
| | | |
| | | // s3不变 |
| | | s2 <<= 8; |
| | |
| | | boolean b = isOutOfArrLength(bs.length, (from - 1) + 4); |
| | | if (b) { |
| | | int s = 0; |
| | | int s0 = bs[from + 0] ;// 最低位 |
| | | int s1 = bs[from + 1] ; |
| | | int s2 = bs[from + 2] ; |
| | | int s3 = bs[from + 3] ; |
| | | int s0 = bs[from + 0] & 0xFF ;// 最低位 |
| | | int s1 = bs[from + 1] & 0xFF ; |
| | | int s2 = bs[from + 2] & 0xFF ; |
| | | int s3 = bs[from + 3] & 0xFF ; |
| | | |
| | | // s0不变 |
| | | s1 <<= 8; |
| | |
| | | boolean b = isOutOfArrLength(bs.length, (from - 1) + 2); |
| | | if (b) { |
| | | int s = 0; |
| | | int s0 = bs[from + 0] ; |
| | | int s1 = bs[from + 1] ; |
| | | int s0 = bs[from + 0] & 0xFF ; |
| | | int s1 = bs[from + 1] & 0xFF ; |
| | | |
| | | // s1不变 |
| | | s0 <<= 8; |
| | | s = s0 | s1; |
| | | return (short) s; |
| | | |
| | | return (short)s ; |
| | | } else { |
| | | throw new Exception("byte2Short时数组越界"); |
| | | } |
| | |
| | | boolean b = isOutOfArrLength(bs.length, (from - 1) + 2); |
| | | if (b) { |
| | | int s = 0; |
| | | int s0 = bs[from + 0] ; |
| | | int s1 = bs[from + 1] ; |
| | | int s0 = bs[from + 0] & 0xFF ; |
| | | int s1 = bs[from + 1] & 0xFF ; |
| | | |
| | | // s0不变 |
| | | s1 <<= 8; |
| | |
| | | * @return 返回 String |
| | | */ |
| | | public static String bytes2Hex(byte[] src, boolean hasBlank){ |
| | | StringBuilder stringBuilder = new StringBuilder(""); |
| | | if (src == null || src.length <= 0) { |
| | | return null; |
| | | } |
| | | for (int i = 0; i < src.length; i++) { |
| | | int v = src[i] & 0xFF; |
| | | String str = Integer.toHexString(v); |
| | | if (str.length() < 2) { |
| | | str = "0" + str; |
| | | } |
| | | if (hasBlank) { |
| | | if (i == 0) { |
| | | stringBuilder.append(str); |
| | | } else { |
| | | stringBuilder.append(" " + str); |
| | | } |
| | | } else { |
| | | stringBuilder.append(str); |
| | | } |
| | | } |
| | | return stringBuilder.toString().toUpperCase(Locale.US); |
| | | return bytes2Hex_BE(src, hasBlank) ; |
| | | } |
| | | |
| | | /** |
| | | * 字节数组转换成十六进制的字符串 |
| | | * |
| | | * @param src byte[] |
| | | * @param hasBlank 16进制是否用空格分隔 |
| | | * @return 返回 String |
| | | */ |
| | | public static String bytes2Hex_BE(byte[] src, boolean hasBlank){ |
| | | StringBuilder stringBuilder = new StringBuilder(""); |
| | | if (src == null || src.length <= 0) { |
| | | return null; |
| | | } |
| | | for (int i = 0; i < src.length; i++) { |
| | | int v = src[i] & 0xFF; |
| | | String str = Integer.toHexString(v); |
| | | if (str.length() < 2) { |
| | | str = "0" + str; |
| | | } |
| | | if (hasBlank) { |
| | | if (i == 0) { |
| | | stringBuilder.append(str); |
| | | } else { |
| | | stringBuilder.append(" " + str); |
| | | } |
| | | } else { |
| | | stringBuilder.append(str); |
| | | } |
| | | } |
| | | return stringBuilder.toString().toUpperCase(Locale.US); |
| | | } |
| | | /** |
| | | * 字节数组转换成十六进制的字符串 |
| | | * |
| | | * @param src byte[] |
| | | * @param hasBlank 16进制是否用空格分隔 |
| | | * @return 返回 String |
| | | */ |
| | | public static String bytes2Hex_LE(byte[] src, boolean hasBlank){ |
| | | StringBuilder stringBuilder = new StringBuilder(""); |
| | | if (src == null || src.length <= 0) { |
| | | return null; |
| | | } |
| | | for (int i = src.length - 1 ; i >= 0; i--) { |
| | | int v = src[i] & 0xFF; |
| | | String str = Integer.toHexString(v); |
| | | if (str.length() < 2) { |
| | | str = "0" + str; |
| | | } |
| | | if (hasBlank) { |
| | | if (i == 0) { |
| | | stringBuilder.append(str); |
| | | } else { |
| | | stringBuilder.append(" " + str); |
| | | } |
| | | } else { |
| | | stringBuilder.append(str); |
| | | } |
| | | } |
| | | return stringBuilder.toString().toUpperCase(Locale.US); |
| | | } |
| | | /** |
| | | * 字节数组转换成十六进制的字符串 |
| | | * |
| | | * @param src byte[] |
| | | * @param bs byte[] |
| | | * @param hasBlank 16进制是否用空格分隔 |
| | | * @param from 开始位 |
| | | * @param len 长度 |
| | | * @return 返回 String |
| | | */ |
| | | public static String bytes2Hex(byte[] src, boolean hasBlank, int from, int len){ |
| | | if (src == null || src.length <= 0 || src.length < from + len) { |
| | | public static String bytes2Hex(byte[] bs, boolean hasBlank, int from, int len){ |
| | | if (bs == null || bs.length <= 0 || bs.length < from + len) { |
| | | return null; |
| | | } |
| | | byte[] bb = new byte[len]; |
| | | for (int i = 0 ; i < len; i++) { |
| | | bb[i] = src[from + i]; |
| | | bb[i] = bs[from + i]; |
| | | } |
| | | return bytes2Hex(bb, hasBlank) ; |
| | | } |
| | | /** |
| | | * 字节数组转换成十六进制的字符串 |
| | | * |
| | | * @param bs byte[] |
| | | * @param hasBlank 16进制是否用空格分隔 |
| | | * @param from 开始位 |
| | | * @param len 长度 |
| | | * @return 返回 String |
| | | */ |
| | | public static String bytes2Hex_LE(byte[] bs, boolean hasBlank, int from, int len){ |
| | | if (bs == null || bs.length <= 0 || bs.length < from + len) { |
| | | return null; |
| | | } |
| | | byte[] bb = new byte[len]; |
| | | for (int i = 0 ; i < len; i++) { |
| | | bb[i] = bs[from + i]; |
| | | } |
| | | return bytes2Hex_LE(bb, hasBlank) ; |
| | | } |
| | | /** |
| | | * 十六进制转字节数组 |
| | | * @param hex the hex string |
| | |
| | | return fromIndex ; |
| | | } |
| | | |
| | | private static final char[] HEX_CHAR = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'}; |
| | | /** |
| | | * 将byte[]转换为16进制字符串 |
| | | * |
| | | * @param bytes 待转换byte[] |
| | | * @return 返回 转换后的字符串 |
| | | * 十六进制转字节数组 |
| | | * @param hex the hex string |
| | | * @return 返回 byte[] |
| | | */ |
| | | public static String bytesToHex(byte[] bytes) { |
| | | //一个byte为8位,可用两个十六进制位标识 |
| | | char[] buf = new char[bytes.length * 2]; |
| | | int a = 0; |
| | | int index = 0; |
| | | for (byte b : bytes) { // 使用除与取余进行转换 |
| | | if (b < 0) { |
| | | a = 256 + b; |
| | | } else { |
| | | a = b; |
| | | } |
| | | |
| | | buf[index++] = HEX_CHAR[a / 16]; |
| | | buf[index++] = HEX_CHAR[a % 16]; |
| | | public static int hex2Bytes_LE(String hex, byte[] bs, int fromIndex) { |
| | | if (hex == null || hex.equals("")) { |
| | | return fromIndex; |
| | | } |
| | | return new String(buf); |
| | | } |
| | | /** |
| | | * 将byte[]转换为16进制字符串 |
| | | * |
| | | * @param bytes 待转换byte[] |
| | | * @return 返回 转换后的字符串 |
| | | */ |
| | | public static String bytesToHex(byte[] bytes, int startIndex, int endIndex) { |
| | | byte[] bs = new byte[endIndex - startIndex + 1] ; |
| | | byte j = 0 ; |
| | | for(int i = startIndex; i <= endIndex; i++){ |
| | | bs[j++] = bytes[i] ; |
| | | hex = hex.toUpperCase(Locale.ENGLISH); |
| | | int length = hex.length() / 2; |
| | | char[] hexChars = hex.toCharArray(); |
| | | byte[] d = new byte[length]; |
| | | for (int i = 0; i < length; i++) { |
| | | int pos = i * 2; |
| | | d[i] = (byte) (charToByte(hexChars[pos]) << 4 | charToByte(hexChars[pos + 1])); |
| | | } |
| | | //一个byte为8位,可用两个十六进制位标识 |
| | | char[] buf = new char[bs.length * 2]; |
| | | int a = 0; |
| | | int index = 0; |
| | | for (byte b : bs) { // 使用除与取余进行转换 |
| | | if (b < 0) { |
| | | a = 256 + b; |
| | | } else { |
| | | a = b; |
| | | } |
| | | |
| | | buf[index++] = HEX_CHAR[a / 16]; |
| | | buf[index++] = HEX_CHAR[a % 16]; |
| | | for(int i = 0 ; i < d.length; i++){ |
| | | bs[fromIndex++] = d[(d.length - 1) - i] ; |
| | | } |
| | | return new String(buf); |
| | | return fromIndex ; |
| | | } |
| | | |
| | | /** |
| | | * 将16进制字符串转换为byte[] |
| | | * |
| | | * @param str 待转换字符串 |
| | | * @return 返回 转换后的byte[] |
| | | */ |
| | | public static byte[] hexToBytes(String str) { |
| | | if (str == null || "".equals(str.trim())) { |
| | | return new byte[0]; |
| | | } |
| | | |
| | | byte[] bytes = new byte[str.length() / 2]; |
| | | for (int i = 0; i < str.length() / 2; i++) { |
| | | String subStr = str.substring(i * 2, i * 2 + 2); |
| | | bytes[i] = (byte) Integer.parseInt(subStr, 16); |
| | | } |
| | | |
| | | return bytes; |
| | | } |
| | | |
| | | /** |
| | | * Convert char to byte |
| | |
| | | encodeBCD_LE(str, b, 0, b.length); |
| | | |
| | | return b; |
| | | } |
| | | |
| | | /** |
| | | * 小端模式《数据低位在数组低字节》 |
| | | * 整形转成BCD编码,字节顺序是倒的 |
| | | * @param i |
| | | * @param bs |
| | | * @param from |
| | | * @return 返回 |
| | | */ |
| | | public static void int2BCD_LE(int i, byte[] bs, int from)throws Exception { |
| | | String str = "" + i; |
| | | byte[] b = null; |
| | | if (str.length() % 2 == 0) { |
| | | b = new byte[str.length() / 2]; |
| | | } else { |
| | | b = new byte[(str.length() / 2) + 1]; |
| | | } |
| | | encodeBCD_LE(str, b, 0, b.length); |
| | | |
| | | int len = bs.length ; |
| | | int bLen = b.length ; |
| | | for(int j = 0; (j < len && j < bLen); j++){ |
| | | bs[from + j] = b[j] ; |
| | | } |
| | | } |
| | | |
| | | /** |
| | |
| | | } |
| | | |
| | | /** |
| | | * 大端模式《数据低位在数组高字节》 |
| | | * 小端模式《数据低位在数组高字节》 |
| | | * 字符串转换成byte数组 |
| | | * @value bs byte[] |
| | | * @value str String |
| | |
| | | public static long BCD2Long_LE(byte[] b, int startIndex, int endIndex)throws Exception { |
| | | String str = ""; |
| | | str = decodeBCD_LE(b, startIndex, endIndex - startIndex + 1); |
| | | long n = Long.parseLong(str); |
| | | return n; |
| | | return Long.parseLong(str); |
| | | } |
| | | |
| | | /** |