Eclipse creates a new Web project that does not have the project in the Tomcat installation directory WebApps

First, the problem found
Create a new dynamic Web project in Eclipse, configure the local tomcat and write the code and choose Run on Server, but after running it, it is found that the project name is not present in the WebApps installation directory of Tomcat.
Second, verification
It is clear that the project was not automatically deployed to Tomcat's WebApps but was deployed in a different container. Enter http://localhost:8080/webDemo/login.jsp in the built-in browser to open normally. However, when you open http://localhost:8080 on an external browser, the desired kitten screen does not appear.
Third, Reason
Unlike MyEclipse, Eclipse does not deploy projects to WebApps in the Tomcat installation directory by default, but is deployed by default to the working directory. METADATA/.PLUGINS/ORG.ECLIPSE.WST.SERVER.CORE/TMP1 /wtpwebapps, the Tmp1 folder contains information about the item.
Iv. modification
In order for the project to be deployed by default to WebApps in the Tomcat installation directory, show View->servers-> finds the tomcat-> that needs to be modified right-click
① Stop the Tomcat server within Eclipse (stop)
② Delete the items deployed in the container (add and remove)
③ clearing the container for data (clean)
④ opening the Tomcat's modify interface (open)
⑤ Find servers location, select second (User tomcat installation)
⑥ Modifying the Deploy path to WebApps
⑦ Save Close
It is important to note that the ①②③ must be manipulated, otherwise the following steps will be grayed out.

================================== if the above method is still unresolved, there may be a reason for the following ==================================

The server option is available after you load the project with eclipse normally

Left mouse button Double-click Tomcat v7.0 Server at localhost [Stopped, Synchronized], a configuration screen appears, double-click to maximize it,

Note: Remove the two check boxes under the server options. (Sometimes the default Tomcat configuration check boxes are selected after you open eclipse, and they are removed) to save the changes.

Re-add the project to Tomcat, launch, and the project appears in the WebApps folder in the Tomcat installation directory.

Summary: Plainly is a check box to publish the service module.

Eclipse creates a new Web project that does not have the project in the Tomcat installation directory WebApps