Spring

    Introduction to Spring

1.Spring is a lightweight and an open source frame work created by Rod  Johnson in 2003.
2.Spring is a complete and a modular Frame work. It means spring frame  work can be used for all layers implementation for a real time application  (or) spring can be used for the development of a particular layer of a real  time application.
3.Spring framework is said to be a non-intrusive framework. It means  spring framework does not force a programmer to extend (or) implement  their classes from any predefined class (or) interface given by Spring API.
4.In case of struts f/w. It will force the programmer that the programmer  class must extend from the base class provided by struts API. So, struts  we call them as invasive or intrusive frame work Spring is called light  weight component because of POJO model.
5.Spring framework simplified J2ee application development by introducing  POJO model.
6.Spring is important because of following 3 reasons.   a) Simplicity,   b) 2) feasibility,   c) loose coupling. 7. Spring provides simplicity , because of POJI/POJO interface Model. 8. Spring is easy to test, because. Spring can be executed within a server and  even without a server. 9. Spring provides loose coupling because of IOC (Inversion of control)  mechanism. 10. Spring framework can be used to develop any kind of java application. It  means we can develop starting from a console application up to a  enterprise level application.  11. Unlike other framework, spring framework has its own container.  So, spring works without server also.

Spring Modules:

 In spring 1.x, the framework has divided into 7 well defined modules, but in spring 2.x the framework is divided into 6 modules only.
i. Spring Core Module
ii. Spring Context (spring jee module)
iii. Spring DAO (spring jdbc ) module
iv. Spring ORM module.
v. Spring AOP module.
vi. Spring web mvc module.

Spring Architecture

Comments

Post a Comment

Popular posts from this blog

Exception Handling

Exception Handling Information regarding Exception:-  Dictionary meaning of the exception is abnormal termination. An expected event that disturbs or terminates normal flow of execution called exception. If the application contains exception then the program terminated abnormally the rest of the  application is not executed. To overcome above limi tation in order to execute the rest of the application must handle the  exception. In java we are having two approaches to handle the exceptions. 1)  By using try-catch block. 2)  By using throws keyword. Exception Handling:- The main objective of exception handling is to get normal termination of the application in order to execute rest of the application code. Exception handling means just we are providing alternate code to continue the execution of remaining code and to get normal termination of the application. Every Exception is a predefined class present in different packag...
Read more

Wrapper Class

Image
Wrapper classes Java is an Object oriented programming language so represent everything in the form of the object, but java supports 8 primitive data types these all are not part of object. To represent 8 primitive data types in the form of object form we required 8 java classes these classes are called wrapper classes. All wrapper classes present in the java.lang package and these all classes are immutable classes. Wrapper classes hierarchy Wrapper classes Constructor Integer i = new Integer(10); Integer i1 = new Integer("100"); Float f1= new Float(10.5); Float f1= new Float(10.5f); Float f1= new Float("10.5"); Character ch = new Character('a'); datatypes wrapper-class constructors byte Byte byte,String short Short short,String int Integer int,String long Long ...
Read more

Collections Framework Interview Questions for Fresher and Experienced

1) What is the main objective of collections? 2) What are the advantages of collections over arrays? 3) Collection frame work classes are present in which package? 4) What is the root interface of collections? 5) List out implementation classes of List interface? 6) List out implementation classes of set interface? 7) List out implementation classes of map interface? 8) What is the difference between heterogeneous and homogeneous data? 9) What do you mean by legacy class can you please tell me some of the legacy classes present in collection framework? 10) What are the characteristics of collection classe? 11) What is the purpose of generic version of collection classes? 12) What is the difference between general version of ArrayList and generic version of ArrayList? 13) What is purpose of generic version of ArrayList& arrays? 14) How to get Array by using ArrayList? 15) What is the difference betweenArrayList and LinkedList? 16) How to decide when to use ArrayList...
Read more