package com.opslab.util; import java.io.ByteArrayOutputStream; /** * 常用类型转换 */ public final class ConvertUtil { private final static String hexStr = "0123456789ABCDEF"; /** * 短整型与字节的转换 */ public final static byte[] shortToByte(short number) { int temp = number; byte[] b = new byte[2]; for (int i = 0; i < b.length; i++) { // 将最低位保存在最低位 b[i] = new Integer(temp & 0xff).byteValue(); // 向右移8位 temp = temp >> 8; } return b; } /** * 字节的转换与短整型 */ public final static short byteToShort(byte[] b) { short s; // 最低位 short s0 = (short) (b[0] & 0xff); short s1 = (short) (b[1] & 0xff); s1 <<= 8; s = (short) (s0 | s1); return s; } /** * 整型与字节数组的转换 */ public final static byte[] intToByte(int i) { byte[] bt = new byte[4]; bt[0] = (byte) (0xff & i); bt[1] = (byte) ((0xff00 & i) >> 8); bt[2] = (byte) ((0xff0000 & i) >> 16); bt[3] = (byte) ((0xff000000 & i) >> 24); return bt; } /** * 整型数组转换为字节数组的转换 * * @param arr 整型数组 */ public final static byte[] intToByte(int[] arr) { byte[] bt = new byte[arr.length * 4]; for (int i = 0; i < arr.length; i++) { byte[] t = intToByte(arr[i]); System.arraycopy(t, 0, bt, i + 4, 4); } return bt; } public final static byte[] encodeBytes(byte[] source, char split) { ByteArrayOutputStream bos = new ByteArrayOutputStream(source.length); for (byte b : source) { if (b < 0) { b += 256; } bos.write(split); char hex1 = Character.toUpperCase(Character.forDigit((b >> 4) & 0xF, 16)); char hex2 = Character.toUpperCase(Character.forDigit(b & 0xF, 16)); bos.write(hex1); bos.write(hex2); } return bos.toByteArray(); } /** * bytes数组转char数组 * bytes to chars * * @param bytes bytes数组 */ public final static char[] bytesToChars(byte[] bytes) { char[] chars = new char[]{}; if (valid.valid(bytes)) { chars = new char[bytes.length]; for (int i = 0; i < bytes.length; i++) { chars[i] = (char) bytes[i]; } } return chars; } /** * 字节数组和整型的转换 */ public final static int bytesToInt(byte[] bytes) { int num = bytes[0] & 0xFF; num |= ((bytes[1] << 8) & 0xFF00); num |= ((bytes[2] << 16) & 0xFF0000); num |= ((bytes[3] << 24) & 0xFF000000); return num; } /** * 字节数组和长整型的转换 */ public final static byte[] longToByte(long number) { long temp = number; byte[] b = new byte[8]; for (int i = 0; i < b.length; i++) { b[i] = new Long(temp & 0xff).byteValue(); // 将最低位保存在最低位 temp = temp >> 8; // 向右移8位 } return b; } /** * 字节数组和长整型的转换 */ public final static long byteToLong(byte[] b) { long s; long s0 = b[0] & 0xff;// 最低位 long s1 = b[1] & 0xff; long s2 = b[2] & 0xff; long s3 = b[3] & 0xff; long s4 = b[4] & 0xff;// 最低位 long s5 = b[5] & 0xff; long s6 = b[6] & 0xff; long s7 = b[7] & 0xff; // s0不变 s1 <<= 8; s2 <<= 16; s3 <<= 24; s4 <<= 8 * 4; s5 <<= 8 * 5; s6 <<= 8 * 6; s7 <<= 8 * 7; s = s0 | s1 | s2 | s3 | s4 | s5 | s6 | s7; return s; } /** * 将byte转换为对应的二进制字符串 * * @param src 要转换成二进制字符串的byte值 */ public final static String byteToBinary(byte src) { StringBuilder result = new StringBuilder(); for (int i = 0; i < 8; i++) { result.append(src % 2 == 0 ? '0' : '1'); src = (byte) (src >>> 1); } return result.reverse().toString(); } /** * 将十六进制字符串转为二进制字符串 * * @param hexStr 十六进制字符串 */ public final static String hexStringtoBinarg(String hexStr) { hexStr = hexStr.replaceAll("\\s", "").replaceAll("0x", ""); char[] achar = hexStr.toCharArray(); String result = ""; for (char a : achar) { result += Integer.toBinaryString( Integer.valueOf(String.valueOf(a), 16)) + " "; } return result; } /** * 将二进制转换为十六进制字符输出 * * @param bytes bytes数组 */ public final static String bytesToHexString(byte[] bytes) { String result = ""; String hex; for (byte b : bytes) { //字节高4位 hex = String.valueOf(hexStr.charAt((b & 0xF0) >> 4)); //字节低4位 hex += String.valueOf(hexStr.charAt(b & 0x0F)); result += hex + " "; } return result; } /** * 把16进制字符串转换成字节数组 * * @param hexString 16进制字符串 * @return byte[] */ public final static byte[] hexStringToByte(String hexString) { int len = (hexString.length() / 2); byte[] result = new byte[len]; char[] achar = hexString.toCharArray(); for (int i = 0; i < len; i++) { int pos = i * 2; result[i] = (byte) (toByte(achar[pos]) << 4 | toByte(achar[pos + 1])); } return result; } private final static int toByte(char c) { return (byte) hexStr.indexOf(c); } }