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This article mainly explains "java jsp built-in object is what", interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's take a small series to take you to learn "java jsp built-in object is what" it!

1. Request object of HttpServletRequet class: represents the request object, which is mainly used to accept the data transmitted by the client through HTTP protocol connection.

Response object of HttpSevletResponse class: represents the response object, which is mainly used to send data to the client.

3, JspWriter class out object: mainly used to output data to the client, out of the base class is jspWriter

Session object of HttpSession class: mainly used to save the information of each month and the session associated with the request; the maintenance of session state is a problem that web application developers must face.

Application object of ServletContext class: mainly used to save user information, the running environment of code fragments; it is a shared built-in object, that is, multiple users in a container share an application, so the information saved is shared by all users.

PageContext object of PageContext class: manages web page attributes, wraps the context of the page for jsp pages, manages access to named objects in special visible parts belonging to jsp, and its creation and initialization are completed by containers.

7. Config object of ServletConfig class: code fragment configuration object, identifying the configuration of Servlet.

8. Page object of Object class, processing jsp page, is an instance of object class, refers to an instance of jsp implementation class

Exception object: handling errors and exceptions that occur when jsp files are executed, only used in error pages, provided that isErrorPage=true is included in the page directive.

At this point, I believe that we have a deeper understanding of "java jsp built-in object is what", might as well come to the actual operation of it! Here is the website, more related content can enter the relevant channels for inquiry, pay attention to us, continue to learn!

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