二進位制和十六進位制互轉
阿新 • • 發佈：2019-01-09
廢話不說，直接上程式碼。
/**將16進位制轉換為二進位制
* @param hexStr
* @return
*/
public static byte[] parseHexStr2Byte(String hexStr) {
if (hexStr.length() < 1)
return null;
byte[] result = new byte[hexStr.length()/2];
for (int i = 0;i< hexStr.length()/2; i++) {
int high = Integer.parseInt(hexStr.substring(i*2, i*2+1), 16);
int low = Integer.parseInt(hexStr.substring(i*2+1, i*2+2), 16);
result[i] = (byte) (high * 16 + low);
}
return result;
}
/**將二進位制轉換成16進位制
* @param buf
* @return
*/
public static String parseByte2HexStr(byte buf[]) {
StringBuffer sb = new StringBuffer();
for (int i = 0; i < buf.length; i++) {
String hex = Integer.toHexString(buf[i] & 0xFF);
if (hex.length() == 1) {
hex = '0' + hex;
}
sb.append(hex.toUpperCase());
}
return sb.toString();
}
//eg:
public static void main(String[] args) throws Exception {
String enCode="123456";
byte[] tobyte=parseHexStr2Byte(enCode);
System.out.println(tobyte);
System.out.println(parseByte2HexStr(tobyte));
}