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This article mainly shows you "how to use @ RequiredArgsConstructor instead of @ Autowired in java". The content is simple and clear. I hope it can help you solve your doubts. Let the editor lead you to study and learn the article "how to use @ RequiredArgsConstructor instead of @ Autowired in java".

Replace @ Value with @ ConfigurationProperties

Usage

Define the entity of the corresponding field

@ Data// specifies the prefix @ ConfigurationProperties (prefix = "developer") @ Componentpublic class DeveloperProperty {private String name; private String website; private String qq; private String phoneNumber;}

Inject this bean when you use it

@ RestController@RequiredArgsConstructorpublic class PropertyController {final DeveloperProperty developerProperty; @ GetMapping ("/ property") public Object index () {return developerProperty.getName ()}

We all know that there are three ways to inject a bean (set injection, constructor injection, annotation injection). Spring recommends that we use a constructor to inject Bean.

Let's take a look at what the previous code looks like after it has been compiled

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