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Spring TutorialThis spring tutorial provides in-depth concepts of Spring Framework with simplified examples. It was developed by Rod Johnson in 2003. Spring framework makes the easy development of JavaEE application. It is helpful for beginners and experienced persons. Spring FrameworkSpring is a lightweight framework. It can be thought of as a framework of frameworks because it provides support to various frameworks such as Struts, Hibernate, Tapestry, EJB, JSF, etc. The framework, in broader sense, can be defined as a structure where we find solution of the various technical problems. The Spring framework comprises several modules such as IOC, AOP, DAO, Context, ORM, WEB MVC etc. We will learn these modules in next page. Let's understand the IOC and Dependency Injection first. Inversion Of Control (IOC) and Dependency InjectionThese are the design patterns that are used to remove dependency from the programming code. They make the code easier to test and maintain. Let's understand this with the following code: class Employee{ Address address; Employee(){ address=new Address(); } } In such case, there is dependency between the Employee and Address (tight coupling). In the Inversion of Control scenario, we do this something like this: class Employee{ Address address; Employee(Address address){ this.address=address; } } Thus, IOC makes the code loosely coupled. In such case, there is no need to modify the code if our logic is moved to new environment. In Spring framework, IOC container is responsible to inject the dependency. We provide metadata to the IOC container either by XML file or annotation. Advantage of Dependency Injection
Advantages of Spring FrameworkThere are many advantages of Spring Framework. They are as follows: 1) Predefined TemplatesSpring framework provides templates for JDBC, Hibernate, JPA etc. technologies. So there is no need to write too much code. It hides the basic steps of these technologies. Let's take the example of JdbcTemplate, you don't need to write the code for exception handling, creating connection, creating statement, committing transaction, closing connection etc. You need to write the code of executing query only. Thus, it save a lot of JDBC code. 2) Loose CouplingThe Spring applications are loosely coupled because of dependency injection. 3) Easy to testThe Dependency Injection makes easier to test the application. The EJB or Struts application require server to run the application but Spring framework doesn't require server. 4) LightweightSpring framework is lightweight because of its POJO implementation. The Spring Framework doesn't force the programmer to inherit any class or implement any interface. That is why it is said non-invasive. 5) Fast DevelopmentThe Dependency Injection feature of Spring Framework and it support to various frameworks makes the easy development of JavaEE application. 6) Powerful abstractionIt provides powerful abstraction to JavaEE specifications such as JMS, JDBC, JPA and JTA. 7) Declarative supportIt provides declarative support for caching, validation, transactions and formatting. Spring IndexSpring Tutorial Spring in IDE Dependency Injection
Spring AOP Spring JdbcTemplate Spring ORM SPEL Spring MVC Spring MVC Form Spring MVC Applications Spring MVC Validation Spring MVC Tiles Spring Remoting Spring OXM Spring Java Mail Spring Web Spring Security Tutorial
Spring Boot Spring Interview Spring Quiz Reference Linkshttp://www.springsource.org/http://en.wikipedia.org/wiki/Spring_Framework
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