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Understanding JSP and Servlets in Java Web Applications

This guide provides an overview of JavaServer Pages (JSP) and Servlets, essential components in Java web applications. JSP allows you to embed Java code within HTML, enabling dynamic web content. Key JSP elements include scriptlets for embedding code, declarations for defining variables, and expressions for outputting values. Servlets, on the other hand, separate business logic from presentation, allowing for better organization of code. All JSP pages are converted into Java Servlets and executed by the Tomcat server. For development, download NetBeans to get started.

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Understanding JSP and Servlets in Java Web Applications

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  1. Cliente JSP CSS HTML Processa os dados e devolve a página Envia requisiçãojunto com dados Servidor Tomcat Servlet MySQL

  2. Arquitetura aplicação Web Java

  3. JSP • O JSP é uma página web, dentro da qual inserimos código Java. • Elementos sintáticos JSP: • Scriptlet: <% codigo_programação; %> • Declaração: <%! declaração; %> • Expressão: <%= expressão %>

  4. Servlet • Um servleté uma classe Java, dentro da qual inserimos o código HTML. • É utilizado para separar o código da apresentação (JSP) • Toda página JSP é convertida em código Java puro (Servlet) e executada pelo container Tomcat.

  5. Baixando o NetBeans http://netbeans.org/downloads/index.html

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