CS

Steps to create a servlet and start it in Tomcat:

Note: instructions with jdk1.8.0_131, instructions with jdk1.7.0_80 in Tomcat_jdk1_7

Start Tomcat

  1. Copy the folder Q:\Java8\apache-tomcat-8.5.24 to folder P:\

  2. Define the environment variables in the MS-DOS console:

    SET JAVA_HOME=Q:\Java8\jdk1.8.0_131
    SET CATALINA_HOME=P:\apache-tomcat-8.5.24
    SET PATH=%JAVA_HOME%\bin;%CATALINA_HOME%\bin;%PATH%
    SET CLASSPATH=%CLASSPATH%;%CATALINA_HOME%\lib\servlet-api.jar;%CATALINA_HOME%\lib\Jama-1.0.2.jar;.
    

    It’s recommended to save the previous statements in a bat file (example: sv.bat)

  3. Start the Tomcat server with the command:
    startup
    
  4. Start the browser and write the address:
    http://localhost:8082

  5. Close the Tomcat server with the command:
    shutdown
    

Create a Servlet

  1. Step 1 of Start Tomcat (done)

  2. Step 2 of Start Tomcat (type sv + return)

  3. Create the folder structure of  ”Servlet1” application in the Tomcat installation
    • Create folder “Servlet1” in webapps folder of Tomcat
    • Create folder WEB-INF in webapps\Servlet1\ folder
    • Create folder classes in webapps\Servlet1\WEB-INF folder
    apache-tomcat-8.5.24
    └── webapps
        └── Servlet1
            └── WEB-INF
                └── web.xml
                └── classes
    
  4. Create the  HelloWorld.java file in the webapps\Servlet1\WEB-INF\classes folder. HelloWorld.java

    import java.io.*;
    import javax.servlet.*;
    import javax.servlet.http.*;
    
    public class HelloWorld extends HttpServlet{
        public void doGet(HttpServletRequest request, HttpServletResponse response)
          throws ServletException, IOException {
            PrintWriter out = response.getWriter();
            out.println("Hello World");
        }
    }
    
  5. Compile with the command javac:
    javac HelloWorld.java
    
  6. Create the web.xml file in P:\apache-tomcat-8.5.24\webapps\Servlet1\WEB-INF folder:

    <?xml version="1.0" encoding="ISO-8859-1"?>
    <web-app>
    
    <servlet>
      <servlet-name>primer</servlet-name>
      <servlet-class>HelloWorld</servlet-class>
    </servlet>
    
    <servlet-mapping>
      <servlet-name>primer</servlet-name>
      <url-pattern>/start</url-pattern>
    </servlet-mapping>
    </web-app>
    
  7. Start the Tomcat server as in step 3 of Start Tomcat:

    startup
    
  8. Start the browser and write the address:
    http://localhost:8082/Servlet1/start

Run from pendrive

To execute the Java programs from a pendrive follow the next steps:

  1. Copy the Q:\Java8 folder to your pendrive
  2. Insert the pendrive into your computer.
  3. See the letter asigned to your pendrive. Example: F
  4. Change to that drive: >F:
  5. Execute the .bat file with the definition of the variables

The content of the .bat file, for example s.bat, can be:

SET DRIVE=%cd:~0,3%
SET JAVA_HOME=%DRIVE%Java8\jdk1.8.0_131
SET CATALINA_HOME=%DRIVE%Java8\apache-tomcat-8.5.24
SET PATH=%JAVA_HOME%\bin;%CATALINA_HOME%\bin;%PATH%
SET CLASSPATH=%CLASSPATH%;%CATALINA_HOME%\lib\servlet-api.jar;%CATALINA_HOME%\lib\Jama-1.0.2.jar;.

Or a complete file with variables for Java, Derby, Squirrel and Apache Tomcat are found in: Q:\Java8\sp.bat To execute this sp file:

  1. Open a Command Prompt Window (type CMD after clicking in the Start button of Windows)
  2. Change to the drive whre the file is. Example: >F:
  3. Change to the Java8 folder: >cd Java8
  4. Type the name of the file: >sp