How to use SimpleHttpServer to implement HTTP requests and responses in Java class libraries

How to use SimpleHttpServer to implement HTTP requests and responses in Java class libraries SimpleHttpServer is a simple Java based HTTP server library that can be used to implement HTTP requests and responses. It provides an easy-to-use API to create and manage HTTP servers, enabling developers to quickly build HTTP based applications. The following are the steps to implement HTTP requests and responses using SimpleHttpServer: Step 1: Import the SimpleHttpServer class library Firstly, you need to import the SimpleHttpServer class library into your Java project. You can add the following dependencies in Maven or other similar build tools: <dependency> <groupId>com.sun.net.httpserver</groupId> <artifactId>http</artifactId> <version>20070405</version> </dependency> Step 2: Create an HTTP server Next, you need to create an HTTP server and specify the port number to listen on. You can use the 'com. sun. net. httpserver. HttpServer' class to achieve this step: import com.sun.net.httpserver.HttpServer; public class MyHttpServer { public static void main(String[] args) throws Exception { //Create an HTTP server and specify the port number to listen on HttpServer server = HttpServer.create(new InetSocketAddress(8080), 0); } } Step 3: Implement the HTTP request processor Then, you need to implement an HTTP request processor to process the received HTTP request and generate the corresponding HTTP response. You can use the 'com. sun. net. httpserver. HttpHandler' interface to achieve this step: import com.sun.net.httpserver.HttpExchange; import com.sun.net.httpserver.HttpHandler; public class MyHttpHandler implements HttpHandler { @Override public void handle(HttpExchange exchange) throws IOException { //Process HTTP requests String response="Hello, World!"// Define the response string to be returned to the client //Set response header exchange.getResponseHeaders().set("Content-Type", "text/plain"); //Set response status code exchange.sendResponseHeaders(200, response.length()); //Write response string to output stream OutputStream outputStream = exchange.getResponseBody(); outputStream.write(response.getBytes()); outputStream.close(); } } Step 4: Associate the HTTP request processor with the HTTP server Finally, you need to associate the HTTP request processor with the HTTP server so that the correct processor can be called to process the request when it is received. You can use the 'createContext' method of the 'com. sun. net. httpserver. HttpServer' class to achieve this step: import com.sun.net.httpserver.HttpServer; public class MyHttpServer { public static void main(String[] args) throws Exception { //Create an HTTP server and specify the port number to listen on HttpServer server = HttpServer.create(new InetSocketAddress(8080), 0); //Create an HTTP context, specifying the URL path to be processed and the associated processor server.createContext("/", new MyHttpHandler()); //Start HTTP server server.start(); } } Now, you have successfully implemented a simple HTTP server using the SimpleHttpServer class library, which can receive and process HTTP requests and generate corresponding HTTP responses. I hope this article is helpful for you in implementing HTTP requests and responses using SimpleHttpServer! If necessary, please refer to the Java code example above.