The Java Database Connectivity (JDBC) API is used to access a SQL database from a Java application. JDBC also supports tabular data sources, such as a spreadsheet. Oracle JDeveloper is a free Integrated Development Environment (IDE) for modeling, developing, debugging, optimizing, and deploying Java applications. JDeveloper 10g is used to develop J2EE applications comprising the JSPs, …
How to develop Spring Framework MVC application in NetBeans?
This is a step-by-step guide on how to develop a Spring Framework MVC application from scratch using NetBeans.Spring is basically a technology committed to enabling you to build applications using Plain Old Java Objects (POJOs). It enables you to develop components as POJOs containing only our business logic, while the framework takes care of the …
Unit Testing with JUnit 4 Annotations
JUnit 4.0 introduces a completely different API to the older versions. JUnit 4.0 uses Java 5.0 annotations to describe tests instead of using inheritence. It introduces more flexible initialization and cleanup, timeouts, and parameterized test cases. This post describes the new features in JUnit 4.0, and in the end, I show a basic example that …
Pagination using Hibernate and JSP
If the result set is large, then having the entire result set in memory will not be feasible. With large result sets, you cannot afford to have them in memory. In such case, you have to fetch a chunk of data at a time (query based paging). The down side of using query based paging, …
Struts 2.0 and Spring
In this post, I will describe how to do the same using Struts 2.0. The only major step that needs to be done here is to override the default Struts 2.0 OjbectFactory. Changing the ObjectFactory to Spring give control to Spring framework to instantiate action instances etc. Most of the code is from the previous …
Servlet 3.0
Can’t wait to see Servlet 3.0 in action. More details about the specification and the current status is available in its JSR homepage. The introduction of support for non-blocking I/O takes Java Servlets to a new level and this, in my opinion,is the most significant stride in Servlet specification since it was introduced. The benefits …
Beginners Guide for Struts 2 Custom Validators
Struts 2.0 allows the use of Custom validators through the @CustomValidator annotation. The @CustomValidator annotation takes two mandatory parameters, type and message also read: Struts 2 Tutorials Struts Interview Questions Struts and Spring Integration type: Refers to the “name” given to the validator in the validators.xml file. message: Message to be displayed when this validator …
Difference between hibernate’s save,update and saveOrUpdate() methods
Difference between hibernate’s save,update and saveOrUpdate() methods Hibetnate has set of methods for saving and updating the values in the database. The methods look like same and difficult to differentiate between them if you are not understanding them clearly. If you understand the hibernate mechanism clearly, it doesn’t execute the SQL statements directly to manipulate …