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Spring Boot in Action by Craig Walls

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Appendix C. Configuration properties

Although Spring Boot handles a lot of the grunt work when it comes to configuring the components in your application, you may want to fine-tune some of those components. That’s where configuration properties come in handy.

Chapter 3 describes the @ConfigurationProperties annotation and how it can be used to expose properties that you can configure external to application code. Just as you can use @ConfigurationProperties in components that you create, many of Spring Boot’s auto-configured components are also annotated with @ConfigurationProperties, making it possible to configure them via any supported property source.

For example, to specify the port that an embedded Tomcat or Jetty server should listen ...

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