BAEL-426: Guide to JSP (#803)
* JSP Servlets With Three Examples JSP Article! * Readme BAEL-426 - still needs permanent URL * Cleanup * BAEL-426 - Final spot for working code Tested. It's all good. * Root documentation added! * Cleanup * JSP added * Fixed Broken Module in Spring
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### Relevant Articles:
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- [Circular Dependencies in Spring](http://www.baeldung.com/circular-dependencies-in-spring)
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- [Guide to JSP](http://www.baeldung.com/guide-to-jsp)
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@ -13,3 +13,4 @@ The "REST With Spring" Classes: http://bit.ly/restwithspring
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- [Basic Forms with Spring MVC](http://www.baeldung.com/spring-mvc-form-tutorial)
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- [Returning Image/Media Data with Spring MVC](http://www.baeldung.com/spring-mvc-image-media-data)
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- [Geolocation by IP in Java](http://www.baeldung.com/geolocation-by-ip-with-maxmind)
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- [Guide to JSP](http://www.baeldung.com/guide-to-jsp)
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package com.baeldung.jsp;
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import java.io.IOException;
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import java.io.PrintWriter;
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import javax.servlet.ServletException;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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public class ExampleOne extends HttpServlet {
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private static final long serialVersionUID = 1L;
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@Override
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protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
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response.setContentType("text/html");
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PrintWriter out = response.getWriter();
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out.println(
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"<!DOCTYPE html><html>" +
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"<head>" +
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"<meta charset=\"UTF-8\" />" +
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"<title>HTML Rendered by Servlet</title>" +
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"</head>" +
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"<body>" +
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"<h1>HTML Rendered by Servlet</h1></br>" +
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"<p>This page was rendered by the ExampleOne Servlet!</p>" +
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"</body>" +
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"</html>"
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);
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}
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}
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package com.baeldung.jsp;
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import java.io.IOException;
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import javax.servlet.ServletException;
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import javax.servlet.annotation.WebServlet;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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@WebServlet(
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name = "ExampleThree",
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description = "JSP Servlet With Annotations",
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urlPatterns = {"/ExampleThree"}
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)
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public class ExampleThree extends HttpServlet {
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private static final long serialVersionUID = 1L;
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@Override
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protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
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String message = request.getParameter("message");
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request.setAttribute("text", message);
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request.getRequestDispatcher("/jsp/ExampleThree.jsp").forward(request, response);
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}
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}
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http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd">
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<mvc:annotation-driven content-negotiation-manager="contentNegotiationManager" />
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<context:component-scan base-package="org.baeldung.spring.controller" />
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<context:component-scan base-package="com.baeldung.spring.controller" />
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<bean id="viewResolver"
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class="org.springframework.web.servlet.view.InternalResourceViewResolver">
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<property name="prefix" value="/WEB-INF/view/" />
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<url-pattern>/</url-pattern>
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</servlet-mapping>
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<!-- JSP Servlet -->
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<servlet>
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<servlet-name>ExampleOne</servlet-name>
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<servlet-class>com.baeldung.jsp.ExampleOne</servlet-class>
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</servlet>
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<servlet-mapping>
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<servlet-name>ExampleOne</servlet-name>
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<url-pattern>/jsp/ExampleOne</url-pattern>
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</servlet-mapping>
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<servlet>
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<servlet-name>ExampleThree</servlet-name>
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<servlet-class>com.baeldung.jsp.ExampleThree</servlet-class>
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</servlet>
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<servlet-mapping>
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<servlet-name>ExampleThree</servlet-name>
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<url-pattern>/jsp/ExampleThree</url-pattern>
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</servlet-mapping>
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<!-- additional config -->
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<session-config>
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<%@ page contentType="text/html;charset=UTF-8" language="java" %>
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<!DOCTYPE html>
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<head>
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<title>Java Binding Example</title>
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</head>
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<body>
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<h1>Bound Value</h1>
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<p>You said: ${text}</p>
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</body>
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</html>
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<%@ page contentType="text/html;charset=UTF-8" language="java" %>
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<!DOCTYPE html>
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<head>
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<title>Java in Static Page Example</title>
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</head>
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<body>
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<h1>Java in Static Page Example</h1>
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<% String[] arr = {"What's up?", "Hello", "It's a nice day today!"};
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String greetings = arr[(int)(Math.random() * arr.length)];
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%>
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<p><%= greetings %></p>
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</body>
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</html>
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<%@ page contentType="text/html;charset=UTF-8" language="java" %>
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<html>
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<head>
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<title>JSP Examples</title>
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</head>
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<body>
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<h1>Simple JSP Examples</h1>
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<p>Invoke HTML rendered by Servlet: <a href="ExampleOne" target="_blank">here</a></p>
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<p>Java in static page: <a href="ExampleTwo.jsp" target="_blank">here</a></p>
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<p>Java injected by Servlet: <a href="ExampleThree?message=hello!" target="_blank">here</a></p>
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</body>
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</html>
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