1. Goto Workbench
2. New server wizard
3. Select Tomcat 9
4. Select JDK
5. Give location of
6. Start Tomcat (Stop the previously running tomcat as a prerequisite)

1. Choose the Server as Tomcat

1. Has Web content like html, jsp

1. Right click on WebContent

2. New > JSP

3. Finish

4. Content:

    <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
    <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www/w3.org/TR/html4/loose.dtd">
    <html>
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>Insert title here</title>
    </head>
    <body>
    <%=
    	new java.util.Date()
    %>
    </body>
    </html>
   

5. Scriptlets:

   1. Example 1:

       <%
       java.util.Date today = new java.util.Date();
       String text = "Today's date is: " + today;
       %>
       <%=
       	text
       %>
      

   2. Example 2:

       <%
       String text = "Today's date is: ";
       out.println(text);
       %>
       <%=
       	new java.util.Date()
       %>
      

1. Servlet class: demo.Test

    <servlet>
    	<servlet-name>Test</servlet-name>
    	<servlet-class>demo.Test</servlet-class>
    </servlet>
    <servlet-mapping>
    	<servlet-name>Test</servlet-name>
    	<url-pattern>/Hello</url-pattern>
    </servlet-mapping>
   

2. JSP file: login.jsp

    <servlet>
    	<servlet-name>Login</servlet-name>
    	<jsp-file>/login.jsp</jsp-file>
    </servlet>
    <servlet-mapping>
    	<servlet-name>login</servlet-name>
    	<url-pattern>/login</url-pattern>
    </servlet-mapping>
   

1. Browse for location
2. workspace/servlets2/Deployment
3. Click Finish

http://localhost:8080/Scriptlets/index.jsp?name=bla&id=123456

URLParams.java

 public class URLParams extends HttpServlet {
 	public void doGet(HttpRequest request, HttpResponse response) {
 		String name = request.getParam("name");
 		String id = request.getParam("id");

 		PrintWriter out = response.getWriter();
 		out.println("Name is: " + name);
 		out.println("id id: " + id);
 	}
 }

parameters.jsp

 <%@ page language="java" contentType="text/html;charset=UTF-8"%>
 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www/w3.org/TR/html4/loose.dtd">
 <html>
 	<head>
 		<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
 		<title>Insert title here</title>
 	</head>
 	<body>
 		<%
 			String name = request.getParam("name");
 			String id = request.getParam("id");

 			out.println("Name is: " + name);
 			out.println("id is: " + id);
 		%>
 	</body>
 </html>

1. manipulations.jsp

    <%@ page language="java" contentType="text/html;charset=UTF-8"%>
    <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www/w3.org/TR/html4/loose.dtd">
    <html>
    	<head>
    		<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
    		<title>Insert title here</title>
    	</head>
    	<body>
    		<% for(int i = 0; i < 5; i++) { %>
    			<p>This is run in a scriptlet loop: <%= i %></p>
    		<% } %>
   
    		<%
    			String id = request.getParameter("id");
    			
    				
    		%>
    	</body>
    </html>
   

include directive

1. <%@ include file="<file-path>" %>: like inline copy paste

2. <jsp:include page="<file-path>" />: included only at runtime (variables will not be avialable at compile time)

    <% 
    String id = request.getParameter("id"); 
    %>
   

Including headers, footers (reusable)

1. New JSP includes.jsp

    <body>
    	<%@ include file="copyright.txt" %> <!-- including during translation of JSP into servlet -->
    </body>
   

2. New file > copyright.txt

    Copyright caveofprogramming.com
   

   2. include if file doesn't change very often
   3. Run

3. Dynamic include: New file > updates.txt

    Today's weather is: sunny (changes frequently)
   

   1. includes.jsp

       <body>
       	<p>
       		<!-- Dynamic include: content changes a lot -->
       		<jsp:include page="updates.txt" /> <!-- when jsp is served, browser sends another request for this -->
       	</p>
       </body>
      

New JSP: variables.jsp

 <%
 String name = "Sue";	
 %>

1. To include this use <%@ include ...> for variables (Java code) to be accessible

    <%@ include file="variables.jsp" %> <!-- like copy and paste -->
    <%= name %>