Why does the servlet of POM in the web rely on scope as provided

Why? web in pom Of servlet rely on scope by provided

<dependencies>        <dependency>            <groupId>javax.servlet</groupId>            <artifactId>javax.servlet-api</artifactId>            <version>3.1.0</version>            <scope>provided</scope>        </dependency>         </dependencies>

provided The function of is to work when compiling , It doesn't work when running .

In our Tomcat It also comes with its own servlet-api.jar. If you don't set it like this , At startup, it will conflict with the built-in dependency .

Use idea establish servlet

The premise is that we install the dependencies required by the above project . Then we create .

This is created , This is the default template , Of course, we can also make changes .

Open here first

We can modify the default template here .

But I am used to writing by myself . To put it briefly .