byte数组转换成16进制字符串String：

public class CommonUtil {

/**

* byte数组转换成16进制字符串

* @param src

* @return

*/

public static String bytesToHexString(byte[] src){

StringBuilder stringBuilder = new StringBuilder();

if (src == null || src.length <= 0) {

return null;

}

for (int i = 0; i < src.length; i++) {

int v = src[i] & 0xFF;

String hv = Integer.toHexString(v);

if (hv.length() < 2) {

stringBuilder.append(0);

}

stringBuilder.append(hv);

}

return stringBuilder.toString();

}

}