What configuration is needed to use annotations from javax.validation.constraints
like @Size
, @NotNull
, etc.? Here's my code:
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;
public class Person {
@NotNull
private String id;
@Size(max = 3)
private String name;
private int age;
public Person(String id, String name, int age) {
this.id = id;
this.name = name;
this.age = age;
}
}
When I try to use it in another class, validation doesn't work (i.e. the object is created without error):
Person P = new Person(null, "Richard3", 8229));
Why doesn't this apply constraints for id
and name
? What else do I need to do?
For JSR-303 bean validation to work in Spring, you need several things:
<mvc:annotation-driven />
validation-api-1.0.0.GA.jar
(looks like you already have that)hibernate-validator-4.1.0.Final.jar
@Valid
, and then include a BindingResult
in the method signature to capture errors. Example:
@RequestMapping("handler.do")
public String myHandler(@Valid @ModelAttribute("form") SomeFormBean myForm, BindingResult result, Model model) {
if(result.hasErrors()) {
...your error handling...
} else {
...your non-error handling....
}
}