In the Next post, we will tests this application thoroughly with unit & integration tests, using Test NG, Mockito, DBUnit and testing best practices. Now click on SSN link (which is an update) of 2nd record to update it: Now edit some fields, in addition change the SSN value to a value for an existing record: Try to update, you should get validation error on SSN: Fix that error by changing SSN to unique value, update, and then view complete list of records, update changes should be taken into account: Finally check the database at this moment : That’s it. Hibernate Transaction Manager; import org.hibernate4. Local Session Factory Bean; import org.springframework.transaction.annotation. Enable Transaction Management; @Configuration @Enable Transaction Management @Component Scan() @Property Source(value = ) public class Hibernate Configuration jdbc.driver Class Name = com. Binding Result; import org.springframework.validation. We have also included code to check for SSN uniqueness as it is declared to be unique in database. Restrictions; import org.springframework.stereotype. Repository; import com.websystique.springmvc.model. Employee; @Repository("employee Dao") public class Employee Dao Impl extends Abstract Dao package com.websystique.springmvc.service; import Service; import org.springframework.transaction.annotation. Note that since the transaction are on method scope, and inside method we are using DAO, DAO method will be executed within same transaction. You & your friends can always link my site from your site on and share the learning.
Open browser and browse at Hibernate Example/ Now click on “Add New Employee”, and click on Register button wihtout filling any detail: Now fill the details Click on Register, you should get something similar to: Click on list to go to listing: Now add few records as before: Now click on delete link of Second record, it should get deleted.
Now build the war (either by eclipse as was mentioned in previous tutorials) or via maven command line( : For those of us, who prefer to deploy and run from within eclipse, and might be facing difficulties setting Eclipse with tomcat, the detailed step-by-step solution can be found at : How to setup tomcat with Eclipse.
If you want, you can change them according to your project requirements.
We are using JPA annotations in our entity bean class, however we can also have a simple java bean and mapping details in the xml file.
For any database connection related issues, either put the database driver in container lib or include that in dependencies. Table; /** * Entity bean with JPA annotations * Hibernate provides JPA implementation * @author pankaj * */ @Entity @Table(name="PERSON") public class Person CREATE TABLE `Person` ( `id` int(11) unsigned NOT NULL AUTO_INCREMENT, `name` varchar(20) NOT NULL DEFAULT '', `country` varchar(20) DEFAULT NULL, PRIMARY KEY (`id`) ) ENGINE=Inno DB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8; package com.journaldev.spring.dao; import
We need to plugin spring framework in our web application, that is done by configuring Spring framework Most of the part is boiler plate code, most important part is the spring context file location where we will configure our spring beans and services.
I am using Apache Commons DBCP for connection pooling, but in real life situations, most probably you have connection pooling done by the container and all we need is to provide the JNDI reference details to use. Person; @Repository public class Person DAOImpl implements Person DAO Notice that I am not using Hibernate Transaction, that is because it will be taken care by Spring framework. Service; import org.springframework.transaction.annotation. package com.journaldev.spring; import org.springframework.beans.factory.annotation. Autowired; import org.springframework.beans.factory.annotation. Person DAOImpl - Person List::id=15, name=Pankaj, country=USA This tutorial was aimed to provide sufficient details for you to getting started with Spring MVC and Hibernate integration, I hope you will find it useful.
NOTE: I noticed that some of the readers are getting database connection issues. Logger Factory; import org.springframework.stereotype. Here are our service classes that are using Hibernate DAO classes to work with Person objects. You can download final project from below link and play around with it.
My SQLDialect hibernate.show_sql = true hibernate.format_sql = true package com.websystique.springmvc.configuration; import org.springframework.context. In this post, we are working with form submission, validating user input (via JSR303 annotations). Dispatcher Servlet; public class App Initializer implements Web Application Initializer , assigning the mapping (url-pattern in xml) and instead of providing the path to spring configuration file(spring-servlet.xml) , here we are registering the Configuration Class. Message Source; import org.springframework.stereotype. If not, we generate validation error and redirect to registration page. It provides the wrapper methods for common hibernate operations.
Driver = jdbc:mysql://localhost:3306/websystique jdbc.username = myuser jdbc.password = mypassword hibernate.dialect = org.hibernate.dialect. Jstl View; @Configuration @Enable Web Mvc @Component Scan(base Packages = "com.websystique.springmvc") public class App Config configures a view resolver to identify the real view. Web Application Initializer; import org.context.support. Annotation Config Web Application Context; import org.servlet. Before saving/updating an employee, we are checking if the SSN is unique. Session Factory; import org.springframework.beans.factory.annotation. Autowired; public abstract class Abstract Dao This Generic class is the base class for all DAO implementation classes. List; import org.springframework.beans.factory.annotation. Let’s create the actual Employee Entity itself whose instances we will be playing with in database. After all, we are here to learn together, aren’t we?
In that case, we need to provide mapping file details while configuring Hibernate Session Factory in spring bean configurations.