Demonstrate Servlet Lifecyle by implementing Servlet Interface.

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Thu Oct 31 2024 16:20:13 GMT+0000 (Coordinated Universal Time)

Saved by @varuntej #kotlin 

java 
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import javax.servlet.*; 
import java.io.IOException; 
import java.io.PrintWriter; 
public class MyServlet implements Servlet { 
public void init(ServletConfig config) throws ServletException {} 
public void service(ServletRequest req, ServletResponse res) throws ServletException, IOException { 
PrintWriter out = res.getWriter(); 
out.println("Hello Servlet Lifecycle!"); 
} 
public void destroy() {} 
public ServletConfig getServletConfig() { return null; } 
public String getServletInfo() { return null; } 
} 
Step 1: Install Apache Tomcat 
Download and install Apache Tomcat. 
Set up Tomcat by configuring the environment variables (CATALINA_HOME and JAVA_HOME), if necessary. 
Step 2: Save Your Java Code 
Save your servlet code in a file named MyServlet.java. 
Ensure that this file is located in the WEB-INF/classes directory within your web application directory 
structure. For example: 
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your-webapp ├── WEB-INF │   ├── classes │   │   └── MyServlet.java │   └── web.xml  
Step 3: Compile the Servlet 
Open a terminal or command prompt and navigate to the WEB-INF/classes directory. 
Compile the servlet: 
bash 
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javac -classpath <path-to-servlet-api.jar> MyServlet.java  
Replace <path-to-servlet-api.jar> with the path to the servlet-api.jar file in your Tomcat installation, typically 
located in the lib folder. 
Step 4: Configure web.xml 
In the WEB-INF folder, create or update the web.xml file with the following content: 
xml 
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<web-app>     <servlet>         
class>     
<servlet-name>MyServlet</servlet-name>         
</servlet>     <servlet-mapping>         
<servlet-class>MyServlet</servlet
<servlet-name>MyServlet</servlet-name>         
pattern>/myservlet</url-pattern>     </servlet-mapping> </web-app>  
This configuration maps the servlet to the URL path /myservlet. 
Step 5: Deploy and Run 
<url
Copy your web application folder (your-webapp) into the webapps directory of your Tomcat installation. 
Start Tomcat by running the startup.sh (Linux/Mac) or startup.bat (Windows) file located in the bin directory 
of your Tomcat installation. 
Open a web browser and navigate to http://localhost:8080/your-webapp/myservlet. 
Expected Output 
If the servlet is configured and deployed correctly, you should see: 
plaintext 
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Hello Servlet Lifecycle!  
If there’s an error, the Tomcat logs (located in the logs directory of your Tomcat installation) will contain 
information to help you debug.
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