How to create Validation utility for variable validation in spring boot or java

I have some variable, for them validation rule may change in run time(getting validation rules from Datbase) like

String name ;
Rules: - {Max:10, Min:3, SpacialSymbol:false, AlphaNumeric:ture,...etc}

String age;
Rules: - {max:100,min:19,numeric:true,alphaNumeric:false}

So according to the variable rules may change during runtime...

I want ValidationUtl.isValid(Object variableValue,Object rules)

In Validation utility

static boolean isValid(){//rule implementation}

How can I do it ? in a generic way for validating all rules. I do not want to use if else statement.

You declare an interface

interface Rule<T> {
    boolean isValid(T obj);
}

and then you can encapsulate various checks inside Rule implementations

class MinLength implements Rule<String> {

    private final int min;

    MinLength(int min) {
        this.min = min;
    }

    @Override
    public boolean isValid(String obj) {
        return obj.length() >= min;
    }
}

class IsAlphaNumeric implements Rule<String> {

    @Override
    public boolean isValid(String obj) {
        return true; //TODO: implement the alpha-numeric check
    }
}

// other rules

The last thing you will need is to dynamically obtain rules from your Database and link them with Rule implementations.

public class StringValidator {

    public boolean validate(String string, List<Rule<String>> rules) {
        boolean isValid = true;
        for (Rule<String> rule : rules) {
            if (rule.isValid(string)) {
                isValid = false;
                break;
            }
        }
        return isValid;
    }

    public static void main(String[] args) {
        List<Rule<String>> rules = Arrays.asList(new MinLength(10), new IsAlphaNumeric()); //obtain from Database
        boolean isValid = new StringValidator().validate("blablabla", rules);
    }
}