java服务端接收http请求

    在开发中我们经常会用到http请求来处理数据，直接使用spring的@Controller，虽然很简单，很好实现，但是对于非spring的项目来说，要配置成sping项目也会耗费一些功夫。
因此可以使用java SE进行简单的配置

package controller;

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 org.springframework.stereotype.Service;

import javax.annotation.PostConstruct;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.InetSocketAddress;

@Service
public class TestServer {
    @PostConstruct
    public void initHttpServer() throws IOException {
        HttpServer server = HttpServer.create(new InetSocketAddress(8410), 0);
        server.createContext("/test", new MyHandler());
        server.setExecutor(null); // creates a default executor
        server.start();
    }

    static class MyHandler 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();

                // 这里获取get请求参数
                // will return string in format similar to this: "field1=value1&field2=value2&field3=value3..."
                String queryParams = httpExchange.getRequestURI().getQuery();
                System.out.println(queryParams);

                String response = "this is server";

                httpExchange.sendResponseHeaders(HttpURLConnection.HTTP_OK, response.getBytes("UTF-8").length);

                try (OutputStream responseBody = httpExchange.getResponseBody();
                         OutputStreamWriter writer = new OutputStreamWriter(responseBody, "UTF-8")) {
                        writer.write(response);
                    }
            }

        }
    }
}

参考
https://blog.csdn.net/qq_29125669/article/details/77873923