Java實現的一個超輕量級 HTTP 服務器

這是一個直接用 Java 自帶的 API 實現的超輕量級的 HTTP 服務器，沒有使用第三方類庫

import java.io.IOException;
import java.io.OutputStream;
import java.net.InetSocketAddress;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import java.util.concurrent.Executors;

import com.sun.net.httpserver.Headers;
import com.sun.net.httpserver.HttpExchange;
import com.sun.net.httpserver.HttpHandler;
import com.sun.net.httpserver.HttpServer;
public class HttpServerDemo {
  public static void main(String[] args) throws IOException {
    InetSocketAddress addr = new InetSocketAddress(8080);
    HttpServer server = HttpServer.create(addr, 0);

server.createContext("/", new MyHandler());
server.setExecutor(Executors.newCachedThreadPool());
server.start();
System.out.println("Server is listening on port 8080" );

}
}
class MyHandler implements HttpHandler {
  public void handle(HttpExchange exchange) throws IOException {
    String requestMethod = exchange.getRequestMethod();
    if (requestMethod.equalsIgnoreCase("GET")) {
      Headers responseHeaders = exchange.getResponseHeaders();
      responseHeaders.set("Content-Type", "text/plain");
      exchange.sendResponseHeaders(200, 0);

  OutputStream responseBody = exchange.getResponseBody();
  Headers requestHeaders = exchange.getRequestHeaders();
  Set<String> keySet = requestHeaders.keySet();
  Iterator<String> iter = keySet.iterator();
  while (iter.hasNext()) {
    String key = iter.next();
    List values = requestHeaders.get(key);
    String s = key + " = " + values.toString() + "\n";
    responseBody.write(s.getBytes());
  }
  responseBody.close();
}

}
}</pre>