Java服务端处理Http请求

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Java服务端处理Http请求

以前用Java都是编写客户端发送http请求，这次有需求做一个服务端接收客户端的http请求，并以http标准格式返回数据。在网上搜了一会，大部分都是用socket写的服务端，不符合需求。Java其实提供了一个HttpServer可以处理客户端的http请求。做个记录，省得以后需要还要去网上搜半天。

主要代码如下：

 public class HttpServerDemo {       public static void main(String[] args) throws IOException {        HttpServerProvider provider = HttpServerProvider.provider();          HttpServer httpserver =provider.createHttpServer(new InetSocketAddress(19017), 100);//监听端口19017,能同时接受100个请求          httpserver.createContext("/", new MyResponseHandler());           httpserver.setExecutor(null);          httpserver.start();          System.out.println("server started");      }    public static class MyResponseHandler implements HttpHandler {        @Override        public void handle(HttpExchange httpExchange) throws IOException {            System.out.println("receive");            String requestMethod = httpExchange.getRequestMethod();            if(requestMethod.equalsIgnoreCase("GET")){//客户端的请求是get方法                //设置服务端响应的编码格式，否则在客户端收到的可能是乱码                Headers responseHeaders = httpExchange.getResponseHeaders();                responseHeaders.set("Content-Type", "text/html;charset=utf-8");                //在这里通过httpExchange获取客户端发送过来的消息                //URI url = httpExchange.getRequestURI();                //InputStream requestBody = httpExchange.getRequestBody();                String response = "this is server";                httpExchange.sendResponseHeaders(HttpURLConnection.HTTP_OK, response.getBytes("UTF-8").length);                OutputStream responseBody = httpExchange.getResponseBody();                OutputStreamWriter writer = new OutputStreamWriter(responseBody, "UTF-8");                writer.write(response);                writer.close();                responseBody.close();              }          }    }

花时间最多的是在设置响应头的编码格式上面，网上的例子都没有介绍到，如果不设置编码格式，用浏览器发起http请求时，接收到的返回值可能是乱码。