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This article focuses on "how to understand SpringMVC Notes". Interested friends may wish to have a look at it. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn "how to understand SpringMVC Notes".

1. Concept:

@ RequestMapping is used to establish the correspondence between the request URL and the processing method. Class, request the first level of URL to access the directory. If it is not written here, it is equivalent to the root directory of the application. On the method, request the second-level access directory of the URL, and form the access virtual path together with the first-level directory marked with @ ReqquestMapping on the class.

2. Attributes

(1) value: used to specify the URL of the request, which has the same effect as the path attribute.

(2) method: used to specify the method of the request.

(3) params: used to specify conditions to limit request parameters. It supports simple expressions. The key and value that require the request parameters must be exactly the same as the configuration.

For example:

Params = {"accountName"}, indicating that the request parameter must have an accountName.

Params = {"moenyroom100"}, indicating that the money in the request parameters cannot be 100.

3. The introduction of mvc namespace

Namespace: xmlns:context= "http://www.springframework.org/schema/context"

Xmlns:mvc= "http://www.springframework.org/schema/mvc"

Constraint address: http://www.springframework.org/schema/context

Http://www.springframework.org/schema/context/spring-context.xsd

Http://www.springframework.org/schema/mvc

Http://www.springframework.org/schema/mvc/spring-mvc.xsd

4. Component scanning

SpringMVC is based on the Spring container, so when performing SpringMVC operations, you need to store the Controller in the Spring container, and if you use @ Controller annotation, you need to use it for component scanning.

At this point, I believe you have a deeper understanding of "how to understand SpringMVC comments". 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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