Java int 转大端序、小端序

采用小端法， 字节的排序是从最无意义的字节到最有意义的字节。

而大端法中， 字节的排序是从最有意义的字节到最无意义的字节。

public static byte[] intToByteBig(int n) {
        byte[] b = new byte[4];
        b[0] = (byte) (n >> 24 & 0xff);
        b[1] = (byte) (n >> 16 & 0xff);
        b[2] = (byte) (n >> 8 & 0xff);
        b[3] = (byte) (n & 0xff);
        return b;
    }

    public static byte[] intToByteLittle(int n) {
        byte[] b = new byte[4];
        b[0] = (byte) (n & 0xff);
        b[1] = (byte) (n >> 8 & 0xff);
        b[2] = (byte) (n >> 16 & 0xff);
        b[3] = (byte) (n >> 24 & 0xff);
        return b;
    }