There are 9 implicit objects in JSP, and I can use these 9 objects directly in JSP.
Because the service method has declared and assigned these nine implicit objects, it can be used directly in JSP.
- pageContext
Type: PageContext
Representative: The context of the current page
Function: You can get other hidden objects in the page, and it is also a domain object.
- request
Type: HttpServletRequest
Representative: Request
Function: It can obtain the request information sent by the user, which is also a domain object.
- session
Type: HttpSession
Representative: Current session
Function: It can be used as a domain object to share data.
- application
Type: ServletContext
Representative: Represents the entire WEB application
Function: It is the largest domain object in JavaWeb.
- response
Type: HttpServletResponse
Representative: Response
Function: Send response information to the browser
- out
Type: JspWriter
Representative: Output Stream
Function: You can output content to the page
- config
Type: ServletConfig
Representative: Current JSP configuration information
Function: You can obtain the initialization parameters in the Servlet tag
- page
Type: Object There is the following code in the service method: Object page = this;
Representative: Object representing the current JSP
- exception
Type: Throwable
Representative: Exception information
Function: Get exceptions in the page
The above brief discussion of the 9 implicit objects in JSP is all the content I share with you. I hope you can give you a reference and I hope you can support me more.