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Today, the editor will share with you the relevant knowledge about what the life cycle of Serverlet is. The content is detailed and the logic is clear. I believe most people still know too much about this, so share this article for your reference. I hope you can get something after reading this article. Let's take a look at it.

What does Serverlet mean?

Servlet (Server Applet), whose full name is Java Servlet, has no Chinese translation. Is a server-side program written in Java. Its main function is to browse and change data interactively to generate dynamic Web content. In a narrow sense, Servlet refers to an interface implemented by Java language, and in a broad sense, Servlet refers to a class that implements this Servlet interface no matter what it is. In general, people understand Servlet as the latter.

Implementation mechanism of Serverlet:

The main function of Servlet is to browse and change data interactively to generate dynamic Web content. The process is as follows:

1. Client sends the request to the server

2. Server sends the request information to Servlet

3. Servlet generates the response content and passes it to Server. Response content is generated dynamically, usually depending on the request of client

4. Server returns the response to client.

Life cycle of Serverlet:

1. Server creates an instance of Servlet, that is, calls init ()

2. A request from client arrives at Server

3. Server sends the request to Serverlet

4. Serverlet generates a response to the request

5. Server activates the service () method of Servlet, passing the request and response objects as parameters

A, the service () method gets the information about the request object, processes the request, asks other resources, and gets the required information

B, the service () method uses the method of the response object to send the response back to Server and finally reaches client. The service () method may activate other methods to process the request, such as doGet () or doPost () or a new method developed by the programmer himself

C. For many other client requests, Server creates new request and response objects, but still activates the service () method of the Servlet, passing them as parameters to it. The above loop is repeated, but there is no need to call the init () method again. Generally, Servlet is initialized only once, and when Servlet is no longer needed for Server (usually when Server is turned off), Server calls the Destroy () method of Servlet.

These are all the contents of the article "what is the Life cycle of Serverlet?" Thank you for reading! I believe you will gain a lot after reading this article. The editor will update different knowledge for you every day. If you want to learn more knowledge, please pay attention to the industry information channel.

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