> For the complete documentation index, see [llms.txt](https://codewithmeiy.gitbook.io/core-java/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://codewithmeiy.gitbook.io/core-java/servlets/basic-servlet.md).

# Basic Servlet

A basic Java servlet program that demonstrates handling GET, POST, PUT, and DELETE requests with examples for each HTTP method. You'll need a Java Servlet container like Apache Tomcat to run this code.

```java
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class CRUDServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;

    // Handling GET request
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html");
        response.getWriter().println("Handling GET request");
    }

    // Handling POST request
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html");
        response.getWriter().println("Handling POST request");
    }

    // Handling PUT request
    protected void doPut(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html");
        response.getWriter().println("Handling PUT request");
    }

    // Handling DELETE request
    protected void doDelete(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html");
        response.getWriter().println("Handling DELETE request");
    }
}
```

This servlet defines four methods to handle each of the HTTP methods (GET, POST, PUT, DELETE).

Here are examples of how to use these HTTP methods:

1. GET Request:
   * Open a web browser and navigate to <http://your-server/context-root/example> (replace "your-server" and "context-root" with the appropriate values).
   * You'll see "Handling GET request" displayed in the browser.
2. POST Request:
   * You can use a tool like `curl` to send a POST request from the command line:

     ```shell
     curl -X POST http://your-server/context-root/example
     ```
   * You'll see "Handling POST request" displayed in the response.
3. PUT Request:
   * You can use `curl` to send a PUT request from the command line:

     ```shell
     curl -X PUT http://your-server/context-root/example
     ```
   * You'll see "Handling PUT request" displayed in the response.
4. DELETE Request:
   * You can use `curl` to send a DELETE request from the command line:

     ```shell
     curl -X DELETE http://your-server/context-root/example
     ```
   * You'll see "Handling DELETE request" displayed in the response.

Remember to replace "your-server" and "context-root" with the appropriate values based on your server configuration.