byte[]与int的转换
package Server;/** * * @author ghl */public class ConvertG {public static void main(String args[]) {System.out.println(ConvertG.bytesToInt(ConvertG.intToByte(9001)));byte[] bytes3 = new byte[] { 122, 64, (byte) 168, (byte) 192 };System.out.println(ConvertG.bytesToInt(bytes3));// -1062715270System.out.println(ConvertG.intToByte(ConvertG.bytesToInt(bytes3)));// [122, 64, -88, -64]System.out.println(ConvertG.intToBytes(ConvertG.bytesToInt(bytes3)));// [-64, -88, 64, 122]}/** * @param nNum * @return */public static byte[] intToBytes(int nNum) {byte[] bytesRet = new byte[4];bytesRet[0] = (byte) ((nNum >> 24) & 0xFF);bytesRet[1] = (byte) ((nNum >> 16) & 0xFF);bytesRet[2] = (byte) ((nNum >> 8) & 0xFF);bytesRet[3] = (byte) (nNum & 0xFF);return bytesRet;}/** * add by ghl * * @param i * @return */public static byte[] intToByte(int i) {byte[] abyte0 = new byte[4];abyte0[0] = (byte) (0xff & i);abyte0[1] = (byte) ((0xff00 & i) >> 8);abyte0[2] = (byte) ((0xff0000 & i) >> 16);abyte0[3] = (byte) ((0xff000000 & i) >> 24);return abyte0;}/** * add by ghl * * @param bytes * @return */public static int bytesToInt(byte[] bytes) {int addr = bytes[0] & 0xFF;addr |= ((bytes[1] << 8) & 0xFF00);addr |= ((bytes[2] << 16) & 0xFF0000);addr |= ((bytes[3] << 24) & 0xFF000000);return addr;}}