jdk 原生的HttpServer(com.sun.net.HttpServer) 创建web服务器

最早的学习web编程是写一个Servlet，然后重写里面的service方法，然后去配置web.xml配置，最后部署在tomcat或者jetty等容器中启动。后面是使用一写strtus或者springmvc框架。其实通过jdk源码，可以快速创建web服务，和golang及其的相似。

HttpServer

public static void main(String[] args) {

HttpServer server = HttpServer.create();
server.bind(new InetSocketAddress(8081), 3);
server.createContext("/health", new HealthHandler());
server.createContext("/info", new InfoHandler());
executorService = Executors.newFixedThreadPool(5, DaemonThreadFactory.defaultThreadFactory(daemon));
server.setExecutor(executorService);
server.start();
}


static class HealthHandler implements HttpHandler {
    @Override
    public void handle(HttpExchange httpExchange) throws IOException {
        String responseString = "{\"status\":\"UP\"}";
        httpExchange.sendResponseHeaders(200, responseString.length());
        OutputStream os = httpExchange.getResponseBody();
        os.write(responseString.getBytes());
        os.close();
    }
}

static class InfoHandler implements HttpHandler {

    @Override
    public void handle(HttpExchange httpExchange) throws IOException {
        String responseString = "{}";
        httpExchange.sendResponseHeaders(200, responseString.length());
        OutputStream os = httpExchange.getResponseBody();
        os.write(responseString.getBytes());
        os.close();
    }

}