Java将byte[]和int的互相转换

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/**  * 将整数转换为byte数组并指定长度  */ private static byte[] intToBytes(int a, int length) {     byte[] bs = new byte[length];     for (int i = bs.length - 1; i >= 0; i--) {         bs[i] = (byte) (a % 0xFF);         a = a / 0xFF;     }     return bs; }   /**  * 将byte数组转换为整数  */ private static int bytesToInt(byte[] bs) {     int a = 0;     for (int i = bs.length - 1; i >= 0; i--) {         a += bs[i] * Math.pow(0xFF, bs.length - i - 1);     }     return a; }