jdk自带轻量级http server例子

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JDK6 提供了一个简单的Http Server API,据此我们可以构建自己的嵌入式Http Server,它支持Http和Https协议,提供了HTTP1.1的部分实现，没有被实现的那部分可以通过扩展已有的Http Server API来实现,程序员必须自己实现HttpHandler接口,HttpServer会调用HttpHandler实现类的回调方法来处理客户端请求,在这里,我们把一个Http请求和它的响应称为一个交换,包装成HttpExchange类,HttpServer负责将HttpExchange传给 HttpHandler实现类的回调方法.

import com.sun.net.httpserver.Headers;import com.sun.net.httpserver.HttpExchange;import com.sun.net.httpserver.HttpHandler;import com.sun.net.httpserver.HttpServer;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;//jdk自带轻量级http server例子  http://127.0.0.1:8080/serverpublic class HttpServerDemo {    public static void main(String[] args) throws IOException {        InetSocketAddress addr = new InetSocketAddress(8080);        HttpServer server = HttpServer.create(addr, 0);        server.createContext("/server", 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");            // responseHeaders.set("Content-Type", "text/html; charset=utf-8");            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.write("jdk自带轻量级http server例子".getBytes());            responseBody.close();        }    }}

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