Create a custom validation in Spring MVC4

There are few simple steps to create your custom validation :

1- Create a new package (ex. com.yourcompany.view)
2- Create a new annotation like in the screenshot below

3- Add the following annotation to your annotation interface as in the code below

import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

import javax.validation.Constraint;
import javax.validation.Payload;


@Documented
@Constraint(validatedBy=PhoneConstraintValidator.class)
@Target({ElementType.METHOD,ElementType.FIELD})
@Retention(RetentionPolicy.RUNTIME)
public @interface Phone {

    String message() default "{Phone}";
    Class<?>[] groups() default {};
    Class<? extends Payload>[] payload() default {};
}

4- Define another class called PhoneConstraintValidator in the same package and the below code

import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;

public class PhoneConstraintValidator implements ConstraintValidator<Phone, String> {

    @Override
    public void initialize(Phone phone) {
       
    }

    @Override
    public boolean isValid(String phoneField, ConstraintValidatorContext cxt) {
        if (phoneField == null){
            return false;
        }

        return phoneField.matches("[0-9()-]*");
    }

}


5- Add the annotation to your bean.

Easy !!! Yeah :)


 

Rest & Angular - Spring MVC4

To implement Rest & Angular client in MVC4, you need to :

1- Create the rest controller 

@RestController
public class ReleasesReportController {

    @RequestMapping("/releases")
    public List<Release> getReleases(){
        List<Release> releases=new ArrayList<Release>();
       
        Release release1 =new Release();
        release1.setName("Strong bad");
       
        Release release2 =new Release();
        release2.setName("Back to the feature");
       
        Release release3 =new Release();
        release3.setName("Trogdor");
       
        releases.add(release1);
        releases.add(release2);
        releases.add(release3);
       
        return releases;
       
    }
}

2- Add JSON mapping to the WebAppInitializer class 

    @Override
    public void onStartup(ServletContext servletContext) throws ServletException {
        WebApplicationContext context = getContext();
        servletContext.addListener(new ContextLoaderListener(context));
        ServletRegistration.Dynamic dispatcher = servletContext.addServlet("DispatcherServlet", new DispatcherServlet(context));
        dispatcher.setLoadOnStartup(1);
        dispatcher.addMapping("*.html");
        dispatcher.addMapping("*.pdf");
        dispatcher.addMapping("*.json");

    }


3- Bind it to the front end 


<html ng-app>

<head>
<title> Hello Releases Tracker</title>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.0.8/angular.min.js" > </script>
<script type="text/javascript" src="releases.js"></script>
</head>

<body>
    <div ng-controller="Releases">
        I have {{releases.length}} releases !
       
        <ul class="releases-container">
            <li ng-repeat="release in releases">
            {{release.name}}
             </li>
       
        </ul>
    </div>

</body>

</html>


4- Create the angular file (releases.js) under src/main/webapp folder

function Releases($scope, $http){
  
    $http.get('http://localhost:8080/ReleaseTracker/releases.json').
        success(function(data){
        $scope.releases=data;
    });
  
}

Custom validation example - Spring MVC 4

To build a custom validation example you need to:

1-Create an Interface
2-Create a class that implements ConstraintValidator
3-Use the  custom validation in the Bean


 Step 1: 

@Documented
@Constraint(validatedBy=PhoneConstraintValidator.class)
@Target({ElementType.METHOD,ElementType.FIELD})
@Retention(RetentionPolicy.RUNTIME)
public @interface Phone {

    String message() default "{Phone}";
    Class<?>[] groups() default {};
    Class<? extends Payload>[] payload() default {};
}

Step 2:

public class PhoneConstraintValidator implements ConstraintValidator<Phone, String> {

    @Override
    public void initialize(Phone phone) {
       
     }

    @Override
    public boolean isValid(String phoneField, ConstraintValidatorContext cxt) {
        if (phoneField == null){
            return false;
        }
        return phoneField.matches("[0-9()-]*");
    }

}

Step 3: 

@NotEmpty @Phone
    private String phoneNumber;

Famous Exceptions in Spring MVC 4

java.lang.UnsupportedOperationException: Cannot change HTTP accept header

The DispatcherServlet  looks for a bean with the name localeResolver.

If this isn't detected it will use the default, 

which is a AcceptHeaderLocaleResovler. 

 @Bean
 public MessageSource messageSource(){
  
  ResourceBundleMessageSource messageSource=new 

                ResourceBundleMessageSource();
  messageSource.setBasename("messages");
  return messageSource;
  
 }
 
 @Bean
 public LocaleResolver localeResolver(){
  SessionLocaleResolver resolver =new SessionLocaleResolver();
  resolver.setDefaultLocale(Locale.ENGLISH);
  return resolver;
 }
 
 @Override
 public void addInterceptors(InterceptorRegistry registry)
 {
  LocaleChangeInterceptor changeInterceptor=new 

                LocaleChangeInterceptor();
  changeInterceptor.setParamName("language");
  registry.addInterceptor(changeInterceptor);
 } 

Spring - MVC4 - web.xml file sample

<web-app id="WebApp_ID" version="3.0"
 xmlns="http://java.sun.com/xml/ns/javaee"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
 http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">

 <display-name>Archetype Created Web Application</display-name>

 <servlet>
   <servlet-name>springDispatcherServlet</servlet-name>
   <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  
   <init-param>
       <param-name>contextConfigLocation</param-name>
       <param-value>com.saifmasadeh.WebConfig</param-value>
   </init-param>
  
   <init-param>
       <param-name>contextClass</param-name>
       <param-value>org.springframework.web.context.support.AnnotationConfigWebApplicationContext</param-value>
   </init-param>
  
   <load-on-startup>1</load-on-startup>
 </servlet>

 <servlet-mapping>
   <servlet-name>springDispatcherServlet</servlet-name>
   <url-pattern>*.html</url-pattern>
 </servlet-mapping>

</web-app>

Localization in struts2

1- add this line to the struts.xml file :

<constant name="struts.custom.i18n.resources" value="global" />

2-add the (global.properties) under source package

3-in the (global.properties)

connection.success.message=Connection Success %s


4-to use it in the action, just write the following :

getText("connection.success.message")

Connect multiple DB per Transaction using Hibernate, Struts2 and Spring

Hi Everyone,

I find a solution to connect multiple DB per one transaction using  Hibernate, Struts2 and Spring.
To do that in your project, you need to add Spring Jars:

org.springframework.aop-3.0.5.RELEASE.jar
org.springframework.asm-3.0.5.RELEASE.jar
org.springframework.aspects-3.0.5.RELEASE.jar
org.springframework.beans-3.0.5.RELEASE.jar
org.springframework.context-3.0.5.RELEASE.jar
org.springframework.context.support-3.0.5.RELEASE.jar
org.springframework.core-3.0.5.RELEASE.jar
org.springframework.expression-3.0.5.RELEASE.jar
org.springframework.instrument-3.0.5.RELEASE.jar
org.springframework.instrument.tomcat-3.0.5.RELEASE.jar
org.springframework.jdbc-3.0.5.RELEASE.jar
org.springframework.jdbc.jar
org.springframework.jms-3.0.5.RELEASE.jar
org.springframework.orm-3.0.5.RELEASE.jar
org.springframework.orm.jar
org.springframework.oxm-3.0.5.RELEASE.jar
org.springframework.test-3.0.5.RELEASE.jar
org.springframework.transaction-3.0.0.RELEASE.jar
org.springframework.transaction-3.0.5.RELEASE.jar
org.springframework.web-3.0.2.RELEASE.jar
org.springframework.web-3.0.5.RELEASE.jar
org.springframework.web.jar
org.springframework.web.portlet-3.0.5.RELEASE.jar
org.springframework.web.servlet-3.0.5.RELEASE.jar
org.springframework.web.struts-3.0.5.RELEASE.jar
spring-context-3.0.5.RELEASE.jar
spring-core.jar
commons-dbcp-1.4.jar
commons-pool-1.6.jar

you might don't need all of them. 

and here is the file hierarchies:

applicationContext.xml 

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

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-2.5.xsd">

 

<bean id="dataSourceBean" class="org.apache.commons.dbcp.BasicDataSource">

<property name="driverClassName" value="com.mysql.jdbc.Driver" />

<property name="url" value="jdbc:mysql://localhost/test" /> 

<property name="username" value="root" />

<property name="password" value="root" />

</bean>

<bean id="sessionFactoryBean"

class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">

<property name="dataSource" ref="dataSourceBean" />

<property name="mappingResources">

<list>

<value>tracking/User.hbm.xml</value>

</list>

</property>

<property name="hibernateProperties">

<value>hibernate.dialect=org.hibernate.dialect.MySQLDialect

hibernate.hbm2ddl.auto=update

hibernate.show_sql=true

</value>

</property>

</bean>

 

<bean id="hibernateTemplateBean" class="org.springframework.orm.hibernate3.HibernateTemplate">

<property name="sessionFactory">

<ref bean="sessionFactoryBean" />

</property>

</bean>

<bean id="userDAOBean" class="tracking.UserDAO">

<property name="hibernateTemplate" ref="hibernateTemplateBean" />

</bean>

<bean id="userAction" class="tracking.UserAction">

<property name="userDAO" ref="userDAOBean" />

</bean>

</beans>

UserAction.java

package tracking;

import java.util.ArrayList;

import java.util.List;

import java.sql.Types;

import javax.sql.DataSource;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

import org.springframework.jdbc.core.JdbcTemplate;

import tracking.*;

import com.opensymphony.xwork2.Action;

import com.opensymphony.xwork2.ActionSupport;

import com.opensymphony.xwork2.ModelDriven;

public class UserAction extends ActionSupport implements ModelDriven<User>

{

private static final long serialVersionUID = 1L;

private User          user         = new User();

private UserDAO          userDAO;

public User getModel()

{

return user;

}

public String test(){

System.out.println(" I am in test I " );

ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml", UserAction.class);

System.out.println("ApplicationContext "+ac );

   DataSource dataSource = (DataSource) ac.getBean("dataSourceBean");

   // DataSource mysqlDataSource = (DataSource) ac.getBean("mysqlDataSource");

   System.out.println("dataSource "+dataSource );

   JdbcTemplate jdbcTemplate = new JdbcTemplate(dataSource);

   System.out.println("jdbcTemplate "+jdbcTemplate );

   jdbcTemplate.batchUpdate(new String[] { "update user set idUser = 8 where idUser=1",

       "update user set idUser = 9 where idUser=2" });

    

   return Action.SUCCESS;

}

/**

     * @return the user

     */

    public User getUser()

    {

    return user;

    }

/**

     * @param user the user to set

     */

    public void setUser(User user)

    {

    this.user = user;

    }

/**

     * @return the userDAO

     */

    public UserDAO getUserDAO()

    {

    return userDAO;

    }

/**

     * @param userDAO the userDAO to set

     */

    public void setUserDAO(UserDAO userDAO)

    {

    this.userDAO = userDAO;

    }

}

User.hbm.xml

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping default-access="field">
    <class name="tracking.User" schema="test" table="user">
     
        <id name="idUser" type="java.lang.Integer">
            <column length="15" name="idUser" />
            <generator class="assigned" />
        </id>
   
    </class>
</hibernate-mapping>


!!!!!!!!!!  Important Note !!!!!!!!!! 

if you get exception while trying to connect the DB, 

TNS:listener does not currently know of SID given in connect descriptor 

use this in the applicationContext.xml 

<bean id="XXX" class="org.apache.commons.dbcp.BasicDataSource">

<property name="driverClassName" value="oracle.jdbc.driver.OracleDriver" />

<property name="url" value="jdbc:oracle:thin:@(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=1.1.1.1) (PORT=1525))(CONNECT_DATA=(SERVICE_NAME=XXX)))"/>

<property name="username" value="xxx" />

<property name="password" value="xxx" />

</bean>

References:

http://www.java2s.com/Code/Java/Spring/SetupDataSourceforOracle.htm

http://www.mkyong.com/spring/spring-jdbctemplate-querying-examples/

http://www.mkyong.com/spring/spring-error-classnotfoundexception-org-springframework-web-context-contextloaderlistener/

http://francisoud.blogspot.com/2008/11/simple-jdbc.html

http://www.nabisoft.com/tutorials/struts2/basic-struts2-project-setup#Step4