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qq_30169767 2016-11-17
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/**
* 短整数转字节数组
* @param s type of short 要转换的short值
* @return byte[] 数组
*/
public static byte[] short2bytes(short s) {
byte[] bytes = new byte[2];
for (int i = 1; i >= 0; i--) {
bytes[i] = (byte)(s % 256);
s >>= 8;
}
return bytes;
}
/**
* 字节数组转短整数
* @param bytes
* @return short
*/
public static short bytes2short(byte[] bytes) {
short s = (short)(bytes[1] & 0xFF);
s |= (bytes[0] << 8) & 0xFF00;
return s;
}
/**
* 整数转字节数组
* @param value type of int 要转换的int值
* @return byte[] 数组
*/
public static byte[] intToBytes(int value)
{
byte[] bytes = new byte[4];
bytes[3] = (byte) ((value>>24) & 0xFF);
bytes[2] = (byte) ((value>>16) & 0xFF);
bytes[1] = (byte) ((value>>8) & 0xFF);
bytes[0] = (byte) (value & 0xFF);
return bytes;
}
/**
* 字节数组转整数
* @param src byte数组
* @param offset 从数组的第offset位开始
* @return int数值
*/
public static int bytesToInt(byte[] bytes, int offset) {
int value;
value = (int) ((bytes[offset] & 0xFF)
| ((bytes[offset+1] & 0xFF)<<8)
| ((bytes[offset+2] & 0xFF)<<16)
| ((bytes[offset+3] & 0xFF)<<24));
return value;
}
