Spring MVC 3.x @Valid (JSR 303) Annotation Support

context.xml

  <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
    <property name="webBindingInitializer">
    <!-- Configures Spring MVC DataBinder instances -->
      <bean class="org.springframework.web.bind.support.ConfigurableWebBindingInitializer">
        <property name="validator" ref="validator" />
      </bean>
    </property>
  </bean>

  <!-- Creates the JSR-303 Validator -->
  <bean id="validator" class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean" />

Controller.java

import javax.validation.Valid;
import javax.validation.constraints.NotNull;

import org.springframework.validation.BindingResult;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

@Controller
@RequestMapping("/hoge")
public class Controller {

  public static class Bean {
    @NotNull
    private String name;
    @NotNull
    private String type;
    public void setName(String name) {
      this.name = name;
    }   
    public String getName() {
      return Name;
    }   
    public void setType(String type) {
      this.type = type;
    }   
    public String getType() {
      return type;
    }   
  }
  
  @RequestMapping(value = "foo", method=RequestMethod.POST)
  public String search(ModelMap model, @Valid Bean bean, BindingResult result) {
     if (result.hasErrors()) {
       // invalid
       return "error";
     }   
     // valid
     return "success";
  }
}

pom.xml

    <dependency>
      <groupId>org.hibernate</groupId>
      <artifactId>hibernate-validator</artifactId>
      <version>4.0.0.GA</version>
    </dependency>

see http://omgo.wordpress.com/2009/10/24/spring-mvc-3-x-valid-jsr-303-annotation-support/