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This article focuses on "how to use @ RestController annotations to implement http requests in SpringBoot". Interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn how to use @ RestController annotation to implement http requests in SpringBoot.

@ RestController

@ RestController = @ Controller + @ ResponseBody is composed of two comrades on the right side of the equal sign to briefly introduce two sentences to understand the meaning of our @ RestController:

Controller injects the currently decorated class into the SpringBoot IOC container so that the class is instantiated during the run from the project in which the class is located. Of course, it also has the function of semantics, that is, it means that this class acts as a Controller.

In a nutshell, the function of @ ResponseBody refers to the data returned by all API APIs in this class. Regardless of whether your corresponding method returns Map or other Object, it will be returned to the client in the form of a Json string. I have tried it. If String is returned, it is still String.

@ RestController@RequestMapping ("test") public class SampleController {@ GetMapping public Map testGet () {return new HashMap () {{put ("name", "springboot");}};} @ GetMapping (path = "str") public String testGetStr () {return "OK";}}

This code returns JSON String for Map and still String for String

When @ RestController is replaced with @ Controller, the return value for / test is as follows:

At this point, I believe you have a better understanding of "how to use @ RestController annotations to implement http requests in SpringBoot". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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