Last weekend I did a coding exercise creating a small Web MVC app with Spring Boot and Spring Data JPA. Last year I worked through Spring Boot In Action but this was my first real Spring Boot app that went very far beyond Hello World. I didn't need to write a single line of configuration. I'm not just saying no XML configuration, no configuration at all. Spring Data also does a great job of just getting out of the way and letting you work with your database. I selected Spring Data JPA and HSQLDB from the start page and it just worked with no persistence.xml, no hibernate.cfg.xml or hibernate.properties, nothing. This really is a game changer in terms of getting you out of the starting gate and focused on your application without having to go through a lot of Spring ceremony first.
Here's one other little thing I noticed. With the introduction of @SpringBootTest in Spring Boot 1.4 the configuration for an integration test got a bit simpler. This change is described here: Testing improvements in Spring Boot 1.4.
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