How Can I Create a Basic HTTP Server in Java Using the jdk.httpserver Module?

Creating a Basic HTTP Server with Java SE API

When creating a basic HTTP server without the need for manual parsing and formatting, it is possible to utilize the built-in HTTP server within the Java 9 module jdk.httpserver.

Creating a HTTP Server Instance

To set up the HTTP server, use the following steps:

HttpServer server = HttpServer.create(new InetSocketAddress(8000), 0);

Handling HTTP Requests

To handle incoming HTTP requests, implement the HttpHandler interface:

class MyHandler implements HttpHandler {
    @Override
    public void handle(HttpExchange t) throws IOException {
        String response = "This is the response";
        t.sendResponseHeaders(200, response.length());
        t.getResponseBody().write(response.getBytes());
        t.getResponseBody().close();
    }
}

Linking the Server to the Handler

Map the implemented handler to a specific request URI:

server.createContext("/test", new MyHandler());

Running the Server

Start the HTTP server by invoking:

server.start();

Accessing the Server

Upon accessing the server at http://localhost:8000/test, you will receive a response with the following message:

This is the response

Note on Java Versions

The com.sun.net.httpserver package used in this example is available in Java SE 6 and later versions.

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