Custom Validation messages spring not being displayed

Question

I am currently using the following environment:

• Netbeans 8
• Jdk 1.7
• Spring 4
• Hibernate 5.0.1
• Bean validator 1.1

I have got the following files:

• Servlet configuration (Spring):

    <context:component-scan base-package="mz.co.hypervision.web" /> <mvc:annotation-driven /> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/jsp/" /> <property name="suffix" value=".jsp" /> </bean> <bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource"> <property name="basename" value="messages"/> </bean> 

Student class:

   public class Student {
   @NotNull(message = "{age.notnull}")
   private Integer age;
   private String name;
   private Integer id;

   public void setAge(Integer age) {
      this.age = age;
   }
   public Integer getAge() {
      return age;
   }

   public void setName(String name) {
      this.name = name;
   }
   public String getName() {
      return name;
   }

   public void setId(Integer id) {
      this.id = id;
   }
   public Integer getId() {
      return id;
   }
}

Message properties file:

Location: SpringTest\\build\\web\\WEB-INF\\classes

# To change this license header, choose License Headers in Project Properties.
# To change this template file, choose Tools | Templates
# and open the template in the editor.

age.notnull=The age of the student may not be null

UPDATED

Controller code:

import javax.validation.Valid;
import mz.co.hypervision.domain.Student;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.ui.ModelMap;
import org.springframework.validation.BindingResult;

@Controller
public class StudentController {

   @RequestMapping(value = "/student", method = RequestMethod.GET)
   public ModelAndView student() {
      return new ModelAndView("student", "student", new Student());
   }

   @RequestMapping(value = "/addStudent", method = RequestMethod.POST)
   public String addStudent(@ModelAttribute("student") @Valid Student student, 
   BindingResult result, ModelMap model) {

      if(result.hasErrors()) {

          return "student";
      } else {
        model.addAttribute("name", student.getName());
        model.addAttribute("age", student.getAge());
        model.addAttribute("id", student.getId());

        return "result";
      }
   }
}

Please check below that the message appears as {age.notnull}:

Image with the situation

Please assist in figuring out why it is not working, as per my view I have followed every step to make it happen

Answer 1

通过将messages.properties文件添加到java classpath中解决了该问题。