Spring annotations #NotNull and #Size do not work - spring-mvc

Question

I've created a simple page project, which checks a single inputdata field "name" and if it's empty or size is less than 5, it has to show a error-message.
At the moment BindingResult thinks there is no error all the time.
Spring.xml file:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<!-- Step 3: Add support for component scanning -->
<context:component-scan base-package="com.mvc" />
<!-- Step 4: Add support for conversion, formatting and validation support -->
<mvc:annotation-driven/>
<!-- Step 5: Define Spring MVC view resolver -->
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/view/" />
<property name="suffix" value=".jsp" />
</bean>
</beans>
Student class:
package com.mvc;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;
public class Student {
#NotNull(message = "IsRequired!")
#Size(min = 5, message = "must be greater than 5!")
private String name;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
Controller:
package com.mvc;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import javax.validation.Valid;
#Controller
public class StudentController {
#RequestMapping("/")
public String showPage(Model model){
model.addAttribute("student", new Student());
return "index";
}
#RequestMapping("/processForm")
public String processForm(
#Valid #ModelAttribute("student") Student student,
BindingResult theBindingResult) {
if (theBindingResult.hasErrors()) {
return "index";
} else {
return "student-confirm";
}
}
}
If required, i can post web.xml, and jsp pages.

Answer 1

Removed previous version of Tomcat(7.0) and installed latest version.