与Java中的服务器进行通信

Question

I know how to communicate with a server using a PHP script with JSON, but if the server was written in Java how would I communicate with the server using my Java program.

Would it be the same or is there some easier way that would exclude JSON?

The way I'm used to doing it is using a post request and then encoding/decoding in JSON

it is not a webserver

Answer 1

The most efficient way is to use Sockets . The tutorial does a good job of showing a client/server example.

Answer 2

you can use server socket programming as shown below as client you can code like this

import java.io.*;
import java.net.*;
public class Client 
{
    public static void main(String args[])
    {
    try
        {
          Socket server;
          String str="";
          DataInputStream d=new DataInputStream(System.in);
          PrintStream toserver;
          BufferedReader fromserver;
          server=new Socket("117.198.219.36",1096);        //your ip to connect and port no through which you will connect to server
          InputStreamReader isr=new InputStreamReader(server.getInputStream());
          fromserver= new BufferedReader(isr);
          toserver=new PrintStream(server.getOutputStream());
          while(true)
           {
           str=":"+d.readLine();
           toserver.println(str);
           str=fromserver.readLine();
           System.out.println(str);
           }
        }
    catch(Exception e)
        {
         System.out.println(e);
        }
    }
}

this is client side program to send request .

Now the server side program is here below in this you will give same port number to connect to client.

import java.io.*;
import java.net.*;
public class Server
{
    public static void main(String args[])
    {
        ServerSocket sc;
        Socket client;
        DataInputStream d;
        PrintStream toClient;
        BufferedReader fromClient;
        String str="";
        try
              {
               d=new DataInputStream(System.in);
               sc=new ServerSocket(1096);         //the same port no that we had given at client side
               System.out.println("ServerStarted");
               client=sc.accept();
               InputStreamReader isr=new InputStreamReader(client.getInputStream());
               fromClient=new BufferedReader(isr);
               toClient=new PrintStream(client.getOutputStream());
               while(true)
                {
                str=fromClient.readLine();
                System.out.println(str);
                str=":"+d.readLine();
                toClient.println(str);
                }
              }
       catch(Exception e)
              {
                System.out.println(e);
              }
    }
}

try to use them you will be able to connect through this .i hope this will help you.

Answer 3

您可以根据需要进行通信，但是Java开发人员会优先使用rpc（ http://en.wikipedia.org/wiki/Remote_procedure_call ），这是某些框架实现的最简单方法，但是如果您需要对消息的完全控制，则可以这样做以为json甚至直接通过套接字（但我不建议这样做）。