> 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/json-response.md).

# JSON Response

A basic Java servlet program that handles both GET and POST requests and returns JSON responses. This example uses the `javax.servlet` and `javax.servlet.http` packages for handling HTTP requests and responses, and the `org.json` library for JSON processing. Make sure you have the `org.json` library in your classpath, which you can download from here: <https://github.com/stleary/JSON-java>.

```java
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import org.json.JSONObject;

public class JsonServlet extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
        // Create a JSON object with some sample data
        JSONObject jsonObject = new JSONObject();
        jsonObject.put("message", "This is a GET request");
        jsonObject.put("method", "GET");

        // Set response content type to JSON
        response.setContentType("application/json");
        response.setCharacterEncoding("UTF-8");

        // Write the JSON object to the response
        response.getWriter().write(jsonObject.toString());
    }

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException {
        // Create a JSON object with some sample data
        JSONObject jsonObject = new JSONObject();
        jsonObject.put("message", "This is a POST request");
        jsonObject.put("method", "POST");

        // Set response content type to JSON
        response.setContentType("application/json");
        response.setCharacterEncoding("UTF-8");

        // Write the JSON object to the response
        response.getWriter().write(jsonObject.toString());
    }
}
```

In this servlet, we override both the `doGet` and `doPost` methods to handle GET and POST requests. Inside each method, we create a JSON object with some sample data and send it as the response. The content type of the response is set to "application/json," and the JSON object is written to the response's output stream.

Don't forget to configure your **web.xml** or use annotations to map the servlet to a URL pattern, depending on your web application setup.