Action High Quality: Spring Boot In

Then came Spring Boot.

Instead of hunting for compatible versions (remember Jar Hell?), you get a curated set of dependencies that just work.

./mvnw clean package

When you start a Spring Boot application, it makes a series of intelligent assumptions (conventions) based on the libraries available on your classpath. For example:

Here’s a structured, action-oriented guide to Spring Boot in Action —from zero to a production-ready application. Spring Boot In Action

Even with convention over configuration, developers still stumble. Here is how to keep Spring Boot in action without shooting yourself in the foot.

→ Open http://localhost:8080/api/hello Then came Spring Boot

@SpringBootTest @AutoConfigureMockMvc class BookControllerTest @Autowired private MockMvc mockMvc;