levelup.lishman.com
level up - Getting Started with Hibernate
http://levelup.lishman.com/hibernate/getting-started/index.php
Getting Started with Hibernate. Hibernate is an object-relational persistence framework which maps plain old Java objects (POJOs) to relational database tables and transforms the data from one representation to the other. Metadata (specified in XML or using annotations) maps the fields of a class to the columns of a table so that a persisted instance of the class is represented by a row in the table. Hibernate consists of these components. Metadata to describe the mapping between classes and tables.
levelup.lishman.com
level up - Entity Associations in Hibernate
http://levelup.lishman.com/hibernate/associations/index.php
Entity Associations in Hibernate. Hibernate lets you map associations between persistent classes to reflect the relationships between the underlying database tables. For example, we can map the associations on these Java classes. To the foreign key constraint on these tables. SQL is automatically generated and executed by Hibernate when the associations are accessed. Don't get left behind! Learn Angular 2 for free. Online examples and tutorials at lishman.io.
levelup.lishman.com
level up - Orace SQL Joins
http://levelup.lishman.com/oracle/joins/index.php
Statement, a join combines data from two or more tables to produce the required results. So far, all of our SQL has been centered around a single table called COUNTRY. In reality, of course, a database will consist of many more tables like this:. We could certainly enquire on each table individually, but we discover the real power of the relational database when we start to merge data from several tables to produce the results. SQL joins allow us to do just that. Don't get left behind!
levelup.lishman.com
level up - Hibernate Object Relational Mapping with Spring MVC
http://levelup.lishman.com/spring/hibernate-orm/index.php
Hibernate Object Relational Mapping with Spring MVC. The Spring framework provides integration support for JDBC, and for ORM frameworks such as Hibernate. JPA, JDO, TopLink and iBATIS SQL Maps. This section focuses on Hibernate. And shows how Spring can be used to provide resource management and transaction support. Don't get left behind! Learn Angular 2 for free. Online examples and tutorials at lishman.io.
levelup.lishman.com
level up - Hibernate Query Language
http://levelup.lishman.com/hibernate/hql/index.php
Hibernate Query Language (HQL) is an object oriented query language which is derived from SQL. However, instead of naming database tables and columns in a query, Java classes and properties are used instead. Select cont.countries from Continent cont where cont.name = 'Europe'. Hibernate converts HQL into the appropriate native SQL for the database and populates persistent objects with the results of the query. We map these persistent classes to the tables:. Entity @Table(name="COUNTRY") public class Coun...
levelup.lishman.com
level up - The Spring Inversion of Control Container
http://levelup.lishman.com/spring/ioc-container/index.php
The Spring Inversion of Control Container. Spring promotes loose coupling of components, using the Spring Inversion of Control. Objects in the application are assembled and managed by Spring, using Dependency Injection. DI) So, instead of creating their own dependencies using the. Operator, or looking up dependencies using JNDI, objects are given. Don't get left behind! Learn Angular 2 for free. Online examples and tutorials at lishman.io.
levelup.lishman.com
level up - Form Processing with Spring MVC
http://levelup.lishman.com/spring/form-processing/index.php
Form Processing with Spring MVC. Annotation-driven configuration in Spring MVC greatly simplifies HTML form processing. Spring helps us to prepare and display the editable data for the form, as well as arbitrary reference data, such a drop down list of permitted values, for example. A data binding mechanism automatically populates Java objects from the submitted form data, and there is also support for validation and error output. Don't get left behind! Learn Angular 2 for free.
levelup.lishman.com
level up - Oracle Integrity Constraints
http://levelup.lishman.com/oracle/constraints/index.php
We made some fundamental assumptions in the previous sections. In particular, we took it for granted that results from the queries were correct because the data in the tables was correct. However, there is nothing stopping us from making changes which would invalidate this data. Here are a few examples. A value, which is essential to an application, is set to null. INSERT INTO continent (cont id, cont name) VALUES (1, ' ); UPDATE continent SET cont id = null WHERE cont name = 'Asia';. SELECT cont name FR...
levelup.lishman.com
level up - Getting Started with Spring Web MVC
http://levelup.lishman.com/spring/getting-started/index.php
Getting Started with Spring Web MVC. Spring's web framework is based on the Model-View-Controller. Represents the application data. Presents the data from the model. Receives user input and populates the model. This architecture decouples business functionality from the presentation logic. The Spring MVC Implementation. This tutorial focuses on annotation-driven configuration, which was introduced in Spring 2.5. Don't get left behind! Learn Angular 2 for free.
