javaweb--jsp

1. Prerequisites

Web-inf directory:

1. Web-inf is a secure directory for Java WEB applications. The so-called security is the client cannot access, only the server can access the directory

2. Web. XML: Project Deployment File

3, Classs folder, you can place *.class file

4, Lib folder, for storing the required jar package

2. Basic JSP syntax

JSP page Element composition: declaration, comment, static content, instruction, expression, small script

JSP directives:

1, page directive: usually at the top of the JSP page, the same page can have multiple page directives.

Import= "Contenttype=" "%>

2. include directive: Embed an external file into the current JSP file and parse the JSP statements in this page

<%@ include file= "URL"%>

Include Action:

<jsp:include page= "URL" flush= "True|false"/>

Difference:

<jsp:forward page= "URL"/>

Equivalent to

Request.getrequestdispatcher ("/url"). ForWord (Request,response);

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

Used with the forward action as a sub-label for the forward action

3. taglib directive: Use tag Library to define new custom tags and enable custom behavior in JSP pages

JSP declaration: <%! Java code (variables and methods)%>

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

JSP script: <%jsp script%>

JSP expression: <%= expression%>

javaweb--jsp