Book Image

Spring MVC Blueprints

By : Sherwin John C. Tragura
Book Image

Spring MVC Blueprints

By: Sherwin John C. Tragura

Overview of this book

Spring MVC is the ideal tool to build modern web applications on the server side. With the arrival of Spring Boot, developers can really focus on the code and deliver great value, leveraging the rich Spring ecosystem with minimal configuration. Spring makes it simple to create RESTful applications, interact with social services, communicate with modern databases, secure your system, and make your code modular and easy to test. It is also easy to deploy the result on different cloud providers. This book starts all the necessary topics in starting a Spring MVC-based application. Moving ahead it explains how to design model objects to handle file objects. save files into a data store and how Spring MVC behaves when an application deals with uploading and downloading files. Further it highlights form transactions and the user of Validation Framework as the tool in validating data input. It shows how to create a customer feedback system which does not require a username or password to log in. It will show you the soft side of Spring MVC where layout and presentation are given importance. Later it will discuss how to use Spring Web Flow on top of Spring MVC to create better web applications. Moving ahead, it will teach you how create an Invoice Module that receives and transport data using Web Services By the end of the book you will be able to create efficient and flexible real-time web applications using all the frameworks in Spring MVC.
Table of Contents (16 chapters)
Spring MVC Blueprints
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface

The interceptors


Interceptors are popular in the Struts 2 framework, but Spring MVC can implement interceptors to manage sessions, logging, and auditing a user authentication process. The concept of an interceptor is similar to the filters in a typical Java Enterprise model but not exactly the same.

In order to create a handler interceptor, we must make use of org.springframework.web.servlet.HandlerInterceptor. The HandlerInterceptor defines three methods that can be used for pre-processing and post-processing requests:

  • PreHandle: This is called before a URL is executed, and returns a Boolean value. When it returns true, the handler execution chain continues, whereas when it returns false, the DispatcherServlet stops the execution of the entire request-response transaction.

  • PostHandle: This is called after a URL is executed.

  • AfterCompletion: This is called after the result view page has been executed.

The SMP project uses interceptors to check the number of visitors to the portal, the duration...