JavaBeat

Introduction Struts 2.0 is the popular Open Source Presentation Tier framework developed by Apache Group. It is based on MVC Model 2 design pattern. Dispatcher Filter is the front controller for the struts2 based applications. Struts 2.0 has simplified web development for its users by introducing POJO based actions, interceptors, flexible validation and support for [...]

Introduction I have been developing Java applications for a long time and the major difficulty was the coding part related to database manipulations. Recently I shifted to use Object-Relational Mapping through JPA. I have used TopLink, EclipseLink, and Hibernate. Although I could achieve the functionally I want with ease, the output was slower when compared [...]

Introduction MVC architecture has become the default choice for developing web applications. It has become a tradition to develop web applications using multi-tier architecture and hence involving one or more Frameworks. A Framework ensures faster development cycle and guarantees the usage of proven design patterns and architecture. There are various Frameworks available for each layer; [...]

In this article we will see how to use Java Persistence API (JPA) in NetBeans 6.1 with in a Java application. The JPA was first introduced as part of the Java EE 5 platform. This article will not provide any of the theoretical information about JPA. Software used NetBeans IDE 6.1 JDK version 5.0/6.0 MySql [...]

This article is the last part of the article series Java Persistence API (JPA), the earlier articles are introduction to JPA and the query api in JPA. This article is only for explaining the sample program with concepts used in the previous articles. I would recommend reading the previous two articles before start analyzing this [...]

Introduction One of the disadvantage of locating the entity objects using the EntityManager.find() and EntityManager.getReference() methods is, we cannot specify any powerful search criteria for searching the entity objects. All we can provide is the primary key to request for a particular object. Another fact is the class name of entity must be known. The [...]

Introduction Java Persistence API (JPA) provides POJO (Plain Old Java Object) standard and object relational mapping (OR mapping) for data persistence among applications. Persistence, which deals with storing and retrieving of application data, can now be programmed with Java Persistence API starting from EJB 3.0 as a result of JSR 220. This API has borrowed [...]