关于java:16进制字符串转base64

1.将16进制字符串转换为字节数组再转base64

 public static void main(String[] args) { String data = "7d41f335c0e412a9c60343ab2395b3b0"; System.out.println(encode(ByteConvertUtil.hexStringToByteArray(data))); }    public static String encode(byte[] data) {        return new BASE64Encoder().encode(data); }

2.转换工具类

public static byte[] hexStringToByteArray(String s) {    int len = s.length(); byte[] data = new byte[len / 2]; for (int i = 0; i < len; i += 2) {        data[i / 2] = (byte) ((Character.digit(s.charAt(i), 16) << 4)                + Character.digit(s.charAt(i + 1), 16)); }    return data;}