java int 与 byte转换

public static byte[] toByteArray(int iSource, int iArrayLen) {
byte[] bLocalArr = new byte[iArrayLen];
for ( int i = 0; (i < 4) && (i < iArrayLen); i++) {
bLocalArr[i] = (byte)( iSource>>8*i & 0xFF );

}
return bLocalArr;
}

// 将byte数组bRefArr转为一个整数,字节数组的低位是整型的低字节位
public static int toInt(byte[] bRefArr) {
int iOutcome = 0;
byte bLoop;

for ( int i =0; i<bRefArr.length ; i++) {
bLoop = bRefArr[i];
iOutcome+= (bLoop & 0xFF) << (8 * i);

}

return iOutcome;
}