Reference Number "JSP Application Development Detailed" Second Edition
JSP constituent elements: instruction elements, action elements, template elements, scripting elements, declarations, expressions, scriptlets, and built-in objects. Simple, continue.
Note in a JSP:
1 HTML / XML Note:
2 Hide Note: <% - Content -%> <% - Content -%>
Two template elements: actually referring to the front desk, static HTML code, not explained.
Three script elements: declaration, expression (Expression), ScriptleTs
1 Statement: Variables and methods of statement, examples:
<% string getdate () {return new java.util.date (). tolocalestring ();} int count = 10;%>
<%!
String getdate ()
{
Return new java.util.date (). tolocalestring ();
}
INT count = 10;
%>
2 Expression: It is the same as <% = expression%> <% = expression%>.
3 ScriptleTs: is the same as "% scripTlets%> <% scriptlets%>.
Four command elements:
1 Page Directive: Page
2 incrude
3 taglib
Five Action Directive: Dongdong who only works when sending a request. include:
Wait
Ok, I have a roughly understanding of the so-called elements, how do they use it, then you have to decompose.
It is 1 point to sleep, so sleepy! Huhuhu ,,,,,,
Instruction element
It seems that progress is a bit slow, I will work hard!
1 Page instruction: Used to define global properties in the JSP file.
Page instruction properties
Property Description Default Example Language Definition Used Language JavalaANuage = "Java" Import Introduction Other Class Improving Import = "Java.io. *" SESSION Specifies whether the HTTP session is involved in TRESESSION = "True" Buffer Cashier Cash mode is not 8kbuffer = "64KB" AutoFlash Buffer Auto Refresh TRUEAUTOFLASH = "True" Info page information, defined string can be ignored by servlet.getServlet.info () to ignore info = "a new Web" ISERRORPAGE Show an exception page FalseiserrorPage = "false" errorpage The page that is called when defining an exception is ignoring errorpage = "error.jsp" isthreadsafe uses multithreaded trueisthreadsafe = "true" ContentType definition character encoding and page response MIME TYPE = text / html charset = ISO8859-1 Type = "text / html Charset = GB2312 "PageEncodingJSP page Character code PageEncoding = ISO8859-1PageEncoding =" GB2312 "ISELIGNORED Custom EL ignore ISELIGNORED =" True "By chart, I think everyone is more clear.
2 INCLUDE instruction: The resources that can be parsed in JSP can be parsed. (Resolution occurs during the compilation process)
For example: <% @ include file = "Head.jsp"%>
3 Taglib Directive: Use a custom label.
Ok, the instruction element we have learned, I still write it is very easy to understand!
