JSP (Java Server Page) JSP directives and action elements

1. Include actions/ include directives

Include directive syntax: <%@ include file= "URL"%>

Include action syntax: <jsp:include page= "URL" flush= "true | False "></jsp:include>

　　The difference between include actions and include directives:

	Include directives	Include action
Syntax format	<%@ include file= "URL"%>	<jsp:include page= "URL" flush= "true | False "/>
Time to take effect	During page conversion	Request Period
Include content	The actual contents of the file	Output of the page
Convert to Servlet	The main page and the Include page are converted into a servlet	The main page and the included page are converted into separate Serlvet
Compile time	Slower (resources must be parsed)	More quickly
Execution time	More quickly	Slower (each resource must be parsed)

　　　　

2.forward action/Same forward effect code

Forward action syntax: <jsp:forward page= "URL" ></jsp:forward>

Same effect code: request.getrequestdispatcher ("/url"). Forward (ServletRequest req,servletresponse res);

3.param Action

　　　param action Syntax: <jsp:param name= "parameter name" value= "argument value"/>

　Xforward Action + param action

Format:
<jsp:forward page= "URL" >
<jsp:param name= "paramname" value= "Paramvalue"/>
</jsp:forward>

JSP (Java Server Page) JSP directives and action elements