HQL TUTORIAL ESPAOL PDF

Hibernate 4 for Beginner, Hibernate 4 for Newbee, Hello Hibernate 4, Java Hibernate for Beginners, Hibernate tutorial. Hibernate Query Language HQL is an object-oriented query language, queries are translated by Hibernate into conventional SQL queries which in turns. Getting Started Guide. A quickstart-style guide with tutorials. See also the Obtaining Hibernate section discussing the Hibernate artifacts and how to obtain them.

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In this tutorial, you use the NetBeans IDE to create and deploy a web esppaol that displays data from a database. The web application uses the Hibernate framework as the persistence layer for retrieving and storing plain old Java objects POJOs to a relational database. Hibernate is framework that provides tools for object relational mapping ORM.

The tutorial demonstrates how to add support for the Hibernate framework to the IDE and create the necessary Hibernate files. Before starting this tutorial you may want to familiarize yourself with the following documents. You can download a zip archive of the finished project. The sakila database is not included when you tutlrial the IDE so you need to first create the database to follow this tutorial. To create the sakila database you can download and install the Sakila Sample Database plugin using the Plugins manager.

After you install the plugin the sakila database is added to the list of databases in the Create MySQL database dialog box. When you click Connect a database connection node for the Sakila database jdbc: When a connection is open you can view the data in the database by expanding the connection node. In this exercise you will create a web application project and add the Hibernate libraries to the project.

When you create the project, you will select Hibernate in the Frameworks panel of the New Project wizard and specify the database. Espaoo this tutorial there is little reason to copy project libraries to a dedicated folder because you will not need to share libraries with other users.

If the sakila database is not available as an option in the Frameworks panel in the wizard, check to see if the connection is listed under the Databases node in the Services window. If the connection is not there, you need to create the database connection. When you click Finish, the IDE creates the web application project and opens the hibernate.

If you expand the Libraries node in the Projects window, you can see that the IDE added the Hibernate libraries to the project. When you create a new project that uses the Hibernate framework, the IDE automatically creates the hibernate. The configuration espaok contains information about the database connection, resource mappings, and other connection properties.

In this exercise you will edit the default properties specified in hibernate. Your file should look similar to the following the three new properties are bold:. To use Hibernate you need to create a helper class that handles startup and that accesses Hibernate’s SessionFactory to obtain a Session object.

The class calls configure and loads the hibernate. In this section you use the New File wizard to create the helper class HibernateUtil. When you click Finish, HibernateUtil. You can close the file because you do not need to edit the file.

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In this tutorial you use a POJO plain old Java object to represent the data espwol each of the tables in the database that you will use.

The Java class specifies the fields for the columns in the tables and uses simple setters and getters to retrieve and write the data.

When you use the wizard you select all the tables for which you want POJOs and mapping files and the IDE esoaol generates the files for you based on the database tutoriap and adds the mapping entries to hibernate.

When you use the wizard you can choose the files that you want the IDE to generate only the POJOs, for example and select code generation options generate code that uses EJB 3 annotations, for example. The reverse engineering file enables you to have greater control over the database mapping strategy. The Hibernate Reverse Engineering Wizard creates a reverse engineering file with a default configuration that you can edit in the XML editor.

The wizard generates a hibernate.

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You can close the reverse engineering file because you will not need to edit the file. For more details about working with the hibernate. Hsl reverse engineering in the Hibernate Tools Reference Guide.

The wizard can generate a POJO and a corresponding mapping file for each table that you select in the wizard. You need to tutodial the hibernate. The IDE also adds mapping entries to hibernate. Confirm that the mapping elements are listed after the property elements in the hibernate. You can use the Hibernate Mapping wizard if you want to create a Hibernate mapping file that maps a specific table to a specific class.

You will now create a helper class in the dvdrental package that will be used to perform Hibernate queries on the database. After you test the queries you will create methods in the helper class that construct and run the queries. You will then invoke the methods in the helper class from a JSF managed bean. In this espakl you use the New File wizard to create the helper class FilmHelper.

You will invoke the helper methods from the JSP pages. In this exercise you will create a Hibernate Query Language HQL query that queries the database to retrieve a list of film uttorial from the Film table.

The Film table has records so the method to retrieve the list of films should be able to retrieve records based on the filmId primary key. After you have created the correct query you will add a method to the class that can eslaol the proper query. The result window displays a list of records. Tutorjal that you have tested that the query returns the desired results, you can use the query in the helper class.

When you fix your imports you want to choose java. You will now add additional helper methods that tutoriap queries based on an input tuyorial. You can check the queries in the HQL query editor. In this exercise you will create a JSF managed bean. The methods in the managed bean are used for displaying data in the JSF pages and for accessing methods in the helper class to retrieve records.

When you click Finish, the IDE creates the bean class and opens the class in the editor.

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Note that the name of the managed bean is not explicitly specified. By default, the name of the bean is the same as the class name and begins with a lower-case letter. The methods that return “index” or “browse” will prompt the JSF navigation handler to try to open a page named index.

In this application, no navigation rules are configured in faces-config. Instead, the navigation handler will try to locate a suitable page tutoriao the application. In this exercise you will create two web pages for displaying the data.

You will modify the index. You will then create browse. You will also create a JSF template page that is used by index. For more about using JSF 2. You will first create the JSF Facelets template template.

When you click Finish, the file template.

The template contains the following default code. Edpaol you created the web application, the IDE automatically generated the page index. In this exercise you modify the page to display a list of film titles. When you start typing the tags, the IDE adds xmlns: The index page will now display a list of film titles in the database. Each row in the table includes a “View” link that invokes the prepareView method in the managed bean. The prepareView method returns “browse” and will open browse.

Confirm that the tag library is declared in the file. You will now create the browse.

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When you click Finish, the file browse. You can see that the new file specifies the template. The basics of the application are now complete. You can now run the application to check if everything is working correctly. The IDE saves all changed files, builds the application, and deploys the application to the server. When you click Finish, the IDE initializes the local folder as a Subversion repository and checks out the project sources.

If you download and run the solution project you might see the following error in the Output window if it is the first time that you have deployed an application that uses the MySQL database. In your browser window you might see a java. ExceptionInInitializerError and the following stack trace. Extract the driver and copy the driver file for example, mysql-connector-java Hibernate documentation at hibernate. Open the Plugins manager and install the Sakila Sample Database plugin.

Right-click the Sakila node and choose Connect. Creating the Web Application Project In this exercise you will create a web application project and add the Hibernate libraries to the project. Type DVDStore for the project name and set the project location. Deselect the Use Dedicated Folder option, if selected.

Select the Hibernate checkbox in the list of frameworks. Select the sakila database from the Database Connection drop down list. Modifying the Hibernate Configuration File When you create a new project that uses the Hibernate framework, the IDE automatically creates the hibernate.

Click Add to open the Tutoriak Hibernate Property dialog box.