What elements does the screenplay identity in 3.jsp contain? What are their functions and grammatical formats?

The script identifier in jsp contains the following five elements and syntax format:

1, JSP comments

& lt%-* * * * *-% & gt； Is a comment character that is not output to the client.

& lt%! -* * * * * *-% & gt； Comment characters output to the client.

2. Instruction elements

& lt%@ page contenttype = "text/html"% > Sets the specified page content type.

& lt%@ includes ...%> files introduced in the translation stage.

& lt%@ Tag Library ...%> Declares the tag library used by pages that contain custom behaviors.

3. Behavior elements

& ltJSP:useBean & gt； Make JavaBeans components available in this page.

& ltJSP:set property & gt； Set the property value of JavaBeans

& ltJSP:forward & gt； Transfer the processing of the request to a servlet or JSP page.

4. Script elements

& lt% This is a scriptlet%> embedded script code.

Expression element

& lt%= This is an expression% "; Embedded java expression

5. Method declaration

& lt%! string a =“ 1“； %> is used to declare variables and methods in the implementation class of JSP pages.