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One of the best things to do to understand the beauty of Spring Boot is to understand how things were



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done before Spring Boot. In this step, we'll look at one of the projects which we developed in our Spring MVC



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course. Before we start with any project, we need to decide what frameworks and dependencies to use.



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This was a web project, so we would want to use Spring MVC and things like that.



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So we needed to make decisions on what frameworks and what version of them to use.



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We needed to decide, I would want to use Spring MVC and Spring security web, Spring security config.



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I would want to use Jackson databind because I want to do some binding and validation.



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I would want to use JSTL and I would want to use Hibernate validator and also for logging I would



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want to add in log4j. We had to decide what dependencies to add in to our projects.



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Not only that, we needed to decide the versions of them as well.



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Sometimes this 5.0.2.FINAL version might not be compatible with some other version of



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Spring MVC.



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So you needed to decide what are the comparable versions and start using them. Choosing the frameworks



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to use and which version to use is a major decision that we needed to make when we were not using Spring Boot.



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We needed to implement default exception handling.



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You can see that here, we are just implementing simple default exception handling and we needed to create



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a complete Spring configuration file.



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We needed to define the component scan and then we would need to configure a view resolver to redirect the views



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to a JSP. To implement internationalization,



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We needed to implement a message source and also a locale resolver and in addition to that we needed



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to configure our web.xml as well.



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We needed to configure the dispatcher servlet in web.xml so that it can handle all the requests and



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act as a front controller.



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We needed to configure the contex configuration location in here and we also needed to configure the



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Spring security. We needed to configure the filter for it and make sure that it intercepts all the request.



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There is a lot of work that you would need to do to get a simple web application up and running. We configured



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dependencies, dependency version, Spring configuration, configuration for internationalization, logging



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and a lot of other stuff. All these stuff which we looked at in this specific step is the kind of stuff



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which you don't need to do with Spring Boot. Spring Boot would automatically provide all that stuff for



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you, so that you can really concentrate on developing your business logic.



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All the infrastructure would come free for you.



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The idea behind this step was to give you an idea of the world before Spring Boot. If we directly jump into



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spring boot,



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You might not really appreciate  the value that Spring Boot provides. All the stuff which we looked at in



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this specific example would be replaced by a simple starter project called Spring Boot startup web.



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In combination with Spring Boot starter security.



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Just the combination of these two starters would eliminate the need for a lot of configuration that



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we looked at this specific step. We will look at those starters and a lot more about spring boot in



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the subsequent steps.



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Until the next step, bye-bye.