Eclipse creates a servlet instance

It took some time today to create a servlet instance with eclipse, but it was impossible to access it through the browser, and then there was a problem that, after being deployed to Tomcat with a dynamic Web project, there was no corresponding class created in the project, i.e. no classes folder , and then create the Classes folder under the Web-inf in the WebContent directory, creating the corresponding packages and Java classes, which are synchronized to the SRC folder, in addition to the Web. xml file, finally run on server, The servlet can be accessed through a browser, as follows.

Code

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Eclipse creates a servlet instance