从客户端向服务器发送整数 Java

Question

晚上好，我得到了这台服务器，

httpServer

import java.io.IOException;
import java.io.OutputStream;
import java.net.InetSocketAddress;
import java.util.concurrent.atomic.AtomicInteger;
import com.sun.net.httpserver.HttpExchange;
import com.sun.net.httpserver.HttpHandler;
import com.sun.net.httpserver.HttpServer;

public class httpServer {

public static void main(String[] args) throws Exception {
    HttpServer server = HttpServer.create(new InetSocketAddress(8000), 0);
    server.createContext("/test", new MyHandler());
    server.setExecutor(null); // creates a default executor
    server.start();
    //NimServer nimserver = new NimServer(32778);
    //nimserver.serve();

}

static class MyHandler implements HttpHandler {
    AtomicInteger atomicInteger = new AtomicInteger(0); 
    int theValue = atomicInteger.get(); 
    @Override
    public void handle(final HttpExchange t) throws IOException {
        final String response;

        final String requestMethod = t.getRequestMethod();
        if ("GET".equals(requestMethod)) {
            response = String.format("Besuche: %d%n", atomicInteger.addAndGet(1));
        }
        else if ("POST".equals(requestMethod)) {
            atomicInteger.set(0);
            response = "Reset to 0";

        }
        else {
            throw new IOException("Unsupported method");
        }

        t.sendResponseHeaders(200, response.length());
        final OutputStream os = t.getResponseBody();
        os.write(response.getBytes());
        os.close();
    }
}
}

还有这位客户

httpClient

import java.net.*;
import java.io.*;

public class httpClient {

static int clientno = 0;

public static void main(String[] args) throws Exception {

System.out.println(clientno);

URL test = new URL("http://localhost:8000/test");
HttpURLConnection connect = (HttpURLConnection) test.openConnection();
connect.setRequestMethod("POST");
BufferedReader in = new BufferedReader(new   InputStreamReader(connect.getInputStream()));
String inputLine;







while ((inputLine = in.readLine()) != null) 
    System.out.println(inputLine);
in.close();

}
}

现在我想将 int clientno 从客户端发送到服务器，服务器应该像 ++ 一样计算它并将它发送回客户端。我读了很多关于 Dataoutputstream 的内容，但总是包含套接字。没有套接字可以做到吗？

Answer 1

在服务器端，您在 "POST" 的处理程序中必须调用 t.getRequestBody() - 这将为您提供客户端输入。使用 BufferedReader（如果基于文本 - Integer.valueOf(stream.readLine())）或 DataInputStream（如果基于二进制 - stream.readInt()），您可以读取该数字。类似地，通过 t.getResponseBody() 您可以将输出发送给客户端并以类似的方式写入数字。

对于客户端，HttpURLConnection 有 getInputStream() 和 getOutputStream()，您需要像在服务器中一样向其写入 clientNumber。

从客户端向服务器发送整数 Java

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