"Mooc notes" JSP basic syntax

JSP Full name: Java Server Pages. Java server-side page.

Essentially a simplified servlet design that enables the use of HTML tags in java. JSP is a dynamic web development standard, like a servlet, executed on the server side.

Common dynamic Website Development technology:

Jsp:java platform, high security, suitable for the development of large, enterprise-class Web applications.

Asp. NET: Based on visual component development, security, cross-platform poor, the best use of Microsoft supporting systems.

PHP: For small and Medium business Web application Development, Gold Development portfolio: linux+apache+mysql+php

JSP basic syntax

JSP three main instruction elements: Import page Taglib

Page instruction Syntax:

<% @page Property 1 = "Property Value" Property 2 = "Property value 1, property value 2" ... Property N= "Property value N"%>

Page directive Common Properties:

Property	Describe	Default value
Language	Specify the scripting language to use for JSP pages ·	Java
Import	Introduce the class file used in the scripting language	No
ContentType	Specify the encoding used for JSP pages	File type: text/html; Character encoding: Iso-8859-1

Cases:

 <%@page Language="Java"Import="java.util.*"ContentType="Text/html;charset=utf-8"%>

JSP annotations

HTML comments : comments on the JSP page

<!-- I'm an HTML comment  -  The client is visible and the page does not appear

JSP Comment: <%--jsp comment--%> server-side comment, client not visible

JSP script Comments:

// Single-line comment     
/* Multi-line comments */

JSP script

Java code executed in the JSP page, written in the JSP tag <% Java code%>

Cases:

<%  // single-line comment Out.printlin (" Hello everyone!") "); %>

JSP declaration

Define variables or methods in the JSP page, syntax: <%!java code%>

<%! Strings="Zhang San"; intAdd (intx,intt;) {return x+y;}%>

JSP expressions

Expressions executed in JSP pages, syntax: <%= expressions%>//NOTE: Expressions do not end with semicolons

Cases:

<BR>How are you doing<%=s%></BR>X+y<%=Add (Ten,5)%>  

JSP page life cycle

Phase Project

Printing 99 multiplication tables using expressions and script implementations, respectively

"Mooc notes" JSP basic syntax