JSP learning Summary-JSP page elements

JSP page elements:

---- Static part ----- HTML static text

---- Command ----------- starts with "<% @" and ends with "%>"

---- Expression -------- <% = Java expression %>

---- Script ----------- <% Java code %>

---- Declare ----------- <%! Function or method %>

---- Action ----------- start with "<JSP: Action name" and end with "<JSP: Action Name>"

---- Comment ----------- <! -- Annotation: the client can see -->, <% -- Annotation, and the client cannot see -- %>

 

 

JSP notes:

<! -- Comment content --> HTML comment

<% // Comment content %> JSP normal comment

<%/* Comment content */%> JSP normal comment

<% -- Comment content -- %> JSP hide comment

 

 

Script element:

<% = (1 + 2) %> JSP expression, which cannot end with a semicolon.

<% Date = new date (); Out. println (date. gethours (); %> JSP script

<%! Int I = 0; void count () {I ++ ;}%> <%! Public class peaple {private string name; Public getname () {return name ;}%> JSP Declaration (variables, methods, classes)

 

 

Command element:

<% @ Page [Language = "Java"] [contenttype = "text/html; charset = ISO-8859-1"] [method = "dopost"] [inport = "Java. io. *, Java. util. hashtable "] [session =" true "] [errorpage =" error. JSP "] [iserrorpage =" true "] [buffer =" 24kb "] %>
Page command

<% @ Includ file = "url" %> include command

 

 

Action element:

<JSP: Include page = "admin/login. jsp"/> contains actions

<JSP: Forward page = "admin/login. jsp"/> Redirection

<JSP: Param mane = "parametername" value = "<% = STR %>"/> Pass Parameter commands

<JSP: plugin type = "bean | applet" code = "classfiledirectoryname" codebase = "classfiledirectoryname"/> execute the applet or bean tag