【Java】short、int、float、boolean与byte之间的转换工具类

import java.nio.ByteBuffer; /** * 各基础类型与byte之间的转换 **/ public class Utility { /** * 将boolean转成byte[] * @param val * @return byte[] */ public static byte[] Boolean2ByteArray(boolean val) { int tmp = (val == false) ? 0 : 1; return ByteBuffer.allocate(4).putInt(tmp).array(); } /** * 将byte[]转成boolean * @param data * @return boolean */ public static boolean ByteArray2Boolean(byte[] data) { if (data == null || data.length < 4) { return false; } int tmp = ByteBuffer.wrap(data, 0, 4).getInt(); return (tmp == 0) ? false : true; } /** * 将int转成byte[] * @param val * @return byte[] */ public static byte[] Int2ByteArray(int val) { return ByteBuffer.allocate(4).putInt(val).array(); } /** * 将byte[]转成int * @param data * @return int */ public static int ByteArray2Int(byte[] data) { if (data == null || data.length < 4) { return 0xDEADBEEF; } return ByteBuffer.wrap(data, 0, 4).getInt(); } /** * 将float转成byte[] * @param val * @return byte[] */ public static byte[] Float2ByteArray(float val) { return ByteBuffer.allocate(4).putFloat(val).array(); } /** * 将byte[]转成float * @param data * @return float */ public static float ByteArray2Float(byte[] data) { if (data == null || data.length < 4) { return -1234.0f; } return ByteBuffer.wrap(data).getFloat(); } /** * 将byte[]数组转成short[]数组 * @param b * @return short[] */ public static short[] byteArray2ShortArray(byte[] b) { int len = b.length / 2; int index = 0; short[] re = new short[len]; byte[] buf = new byte[2]; for (int i = 0; i < b.length;) { buf[0] = b[i]; buf[1] = b[i + 1]; short st = byteToShort(buf); re[index] = st; index++; i += 2; } return re; } /** * 将一个short[]数组反转为byte[]字节数组 * @param b */ public static byte[] shortArray2ByteArray(short[] b) { byte[] rebt = new byte[b.length * 2]; int index = 0; for (int i = 0; i < b.length; i++) { short st = b[i]; byte[] bt = shortToByte(st); rebt[index] = bt[0]; rebt[index + 1] = bt[1]; index += 2; } return rebt; } /** * short转换为byte[] * @param number * @return byte[] */ public static byte[] shortToByte(short number) { int temp = number; byte[] b = new byte[2]; // 将最低位保存在最低位 b[0] = (byte)(temp & 0xff); temp = temp >> 8; // 向右移8位 b[1] = (byte)(temp & 0xff); return b; } /** * byte[]转换为short * @param b * @return short */ public static short byteToShort(byte[] b) { short s = 0; short s0 = (short) (b[0] & 0xff);// 最低位 short s1 = (short) (b[1] & 0xff); s1 <<= 8; s = (short) (s0 | s1); return s; } }