字节到整形的转换

 public 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;    }高位在后    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;    }

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