I need to restrain a user to enter numeric values in a jsp field.On failure it should give relevant message.This is my current declaration:
@NotNull
@Column(value="userId")
private Long userId;
I need to know what more annotations do i need to add, to get my desired result without changing data type of the field.
Hibernate
@Range - Check if the value is between min and max
Example
@Range(min=1, max=1000)
@Pattern - Check if the property match the regular expression given a match flag @Pattern(regex="regexp", flag=) or @Patterns( {@Pattern(...)} )
Example
@Pattern(regex = "[0-9]+")
Spring
@RegExp - Check if the property match the regular expression given a match flag
Example
@RegExp("[0-9]+")
@Pattern: The annotated {@code CharSequence} must match the specified regular expression. It's useless on Long.Integer or Long field doesn't match a regular expression.
This isn't something that would be done on the validation level.
When you enter something in a form and you submit that form, the browser will send an HTTP request with your <input> fields serialized and sent as request parameters. Spring then, based on the data type of your bean's field, tries to convert from a String request parameter value to a Long type. If it can't do that because the String is not a Long, it will throw exceptions (NumberFormatException) and respond with a 400 error code.
You can validate this on the (HTML5) client side with
<input name="userId" type="number">
Or use
<input type="text" pattern="\d*" />
if you don't want decimal numbers.
@Valid here.