My problem is that I want use bean validation , so I do on my employee bean:
@Pattern( regexp = "\.+",message="Name is not null") @Size(max=10,message = "Name is verylong")
private String name;
I want to check with pattern if the string is null. The problem is that when submit form if the field is length>10, it gives me the error. But if it is null it doens't five me the error. Anyone can help me?
If you want to validate that the field cannot be null, you additionally need the annotation javax.validation.constraints.NotNull:
@Pattern( regexp = "\.+",message="Name is not null")
@Size(max=10,message = "Name is verylong")
@NotNull
private String name;
Consider how this would work if your field was permitted to be null, but if not null it had to match a specific pattern - you would need to have some way of making a regexp that explicitly matched a null value (and Size, and other annotations would need to do the same).
Instead, nulls are not considered as needing to be checked by the built-in validation annotations - your Pattern is asking if the string is empty (i.e. "contains at least one character"), not null - you might want to just use Size's min value instead?
