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Java Development Tutorials

Spring MVC Form Validation Tutorial (With Annotations and ResourceBundle)

December 1, 2014 by javainterviewpoint Leave a Comment

In our previous Spring MVC Validation with annotation tutorial, we have learned how to use JSR303 Bean Validation to validate our Spring MVC Forms. There you could see the validation messages are added on the bean constraints itself @NotEmpty(message=“FirstName cannot be empty”) but that is not the way we code in the real world situation. Messages will be added to a property file separately so that we don’t have to restart the server every time when we modify the validation message or when we add a new message. Let’s see how to do validation with ResourceBundle.

Every thing resembles the same as my previous tutorial except we need to add an entry in the SpringConfig-servlet.xml and new property file.

SpringConfig-servlet.xml

 <beans xmlns="http://www.springframework.org/schema/beans" 
xmlns:context="http://www.springframework.org/schema/context" 
xmlns:mvc="http://www.springframework.org/schema/mvc" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xsi:schemaLocation=" http://www.springframework.org/schema/beans
 http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
 http://www.springframework.org/schema/context
 http://www.springframework.org/schema/context/spring-context-3.0.xsd
 http://www.springframework.org/schema/mvc
 http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
 
 <context:component-scan base-package="com.jackson"></context:component-scan>
 <mvc:annotation-driven/>
 
 <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
 <property name="prefix" value="/WEB-INF/Jsp/"></property>
 <property name="suffix" value=".jsp"></property>
 </bean>
 
 <bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource">
 <property name="basename" value="props"></property>
 </bean>
 
 </beans>

In our configuration file, we have added an entry for the messageSource , which has the property basename whose value is “props” that should be the name of our property file which contains validation error messages.

props.properties

NotEmpty.rb.firstName=FirstName cannot be empty
Size.rb.firstName=Size should be between 1 to 6
NotEmpty.rb.email=Email Address cannot be empty
Email.rb.email=Please enter a valid email address
Size.rb.lastName=Size should be between 1 to 6

The property has to be framed as below.

NotEmpty     .        rb                        . firstName   =  FirstName cannot be empty

Constraint. ModelAttribute . Variable  = Custom message

The property has 4 main parts

  1. Validation Constraints applied on our bean.
  2. ModelAttribute used in our controller.
  3. Variable in our bean for which we have applied the constraints
  4. The custom message which has to be displayed when validation errors occur.

Lets run our application

http://localhost:8080/SpringMVC_Validation/register

Spring_MVC_Validations_ResourceBundle

Other interesting articles which you may like …

  • context:annotation-config vs context:component-scan
  • Spring MVC BeanNameUrlHandlerMapping Example
  • Spring MVC ControllerClassNameHandlerMapping Example
  • Spring MVC SimpleUrlHandlerMapping Example
  • Spring MVC Flow Diagram
  • Spring MVC Multiple submit buttons in a single form
  • Spring MVC SimpleFormController Example
  • Spring 4 – Spring MVC Hello World Example
  • Spring REST Hello World Example – JSON and XML responses
  • ClassNotFoundException: org.springframework.web.context.ContextLoaderListener
  • Fix missing src/main/java folder in Eclipse Maven Project – 2 build path entries are missing
  • Spring MVC CRUD Example with MySql + JdbcTemplate

Filed Under: J2EE, Java, Spring, Spring MVC, Spring Tutorial Tagged With: @Valid, Annotations, Bean Validation, BindingResult, JSR 303 Bean Validation, JSR303, JSR303 validations annotations, messageSource, ResourceBundle, Spring MVC, Spring MVC Form, Spring MVC Form Validation, Validation

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