int 转 byte[] 低字节在前(低字节序)
1 public static byte[] toLH(int n) {
2 byte[] b = new byte[4];
3 b[0] = (byte) (n & 0xff);
4 b[1] = (byte) (n >> 8 & 0xff);
5 b[2] = (byte) (n >> 16 & 0xff);
6 b[3] = (byte) (n >> 24 & 0xff);
7 return b;
8 }
int 转 byte[] 高字节在前(高字节序)
1 public static byte[] toHH(int n) {
2 byte[] b = new byte[4];
3 b[3] = (byte) (n & 0xff);
4 b[2] = (byte) (n >> 8 & 0xff);
5 b[1] = (byte) (n >> 16 & 0xff);
6 b[0] = (byte) (n >> 24 & 0xff);
7 return b;
8 }
byte[] 转 int 低字节在前(低字节序)
1 public int toInt(byte[] b){
2 int res = 0;
3 for(int i=0;i<b.length;i++){
4 res += (b[i] & 0xff) << (i*8);
5 }
6 return res;
7 }
byte[] 转 int 高字节在前(高字节序)
1 public static int toInt(byte[] b){
2 int res = 0;
3 for(int i=0;i<b.length;i++){
4 res += (b[i] & 0xff) << ((3-i)*8);
5 }
6 return res;
7 }