private String hex(int number) {
        return Integer.toHexString(number).toUpperCase();
    }
HexFunction  ->  hex(dataStr)
description:
- Return the string obtained by converting the dataStr to hexadecimal if 'dataStr' can be parsed into numeric
- Return the string obtained by converting the ASCII code corresponding to each character to hexadecimal otherwise
inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/function/arithmetic/HexFunction.java