How to use the same form DTO, with different valid

Question

Which is the best practice to write DTO and follow different validated annotations, without double my code? Below attached a simple example, that I want to avoid:

public class AddressForm1 {

    @NotEmpty
    private String address;

    @NotNull
    @Max(23)
    @Min(30)
    private BigDecimal lng;

    // getters & setters
}

and;

public class AddressForm2 {

    // removed annotation, empty value permitted
    private String address;

    @NotNull
    @Max(43)
    @Min(50)
    private BigDecimal lng;

    //getters & setters
}

Answer 1

You can use Groups, and validate some annotations only when you need, check this Group Hibernate Doc

Answer 2

You can use validation group, and group your constraints. Than decide which set of constraints you'll apply using the @Validated annotation, with the appropriate group specified

Check the example in http://www.javacodegeeks.com/2014/08/validation-groups-in-spring-mvc.html