Ric*_* H. 0 java sockets multiplayer
我正在开发多人游戏，但不知道如何将其他客户端连接到创建的游戏。我的意思是客户端 A 创建到服务器的套接字连接以及其他客户端（A，B ...）如何连接到客户端 A？有人可以帮我吗？
PS我是网络编程的新手，所以如果你能附上一些例子，我将不胜感激。
由于防火墙的原因，另一个客户端无法连接到客户端 A。
您可以创建两种主要类型的网络：
服务器-客户端
点对点
但是客户端可以将一些数据保存到服务器，服务器可以将它们发送给所有客户端（您不需要点对点网络来允许客户端 B 向客户端 A 发送一些数据）。
示例：客户端 B 将自己的地图位置发送给服务器，服务器将数据发送给所有客户端，因此客户端 A 可以在客户端 B 的位置绘制字符图块集。
要将两台PC连接在一起，您需要将服务器调制解调器的端口转发到用作服务器的PC，并从用作服务器的PC的防火墙打开该端口。
您还可以查看在 python 中创建多人游戏，我举了一个例子，其中客户端能够将它们与 IRC 连接在一起并玩 Tic-Tac-Toe 游戏（因此您不必管理服务器）。我在本文末尾添加了一个 Java 示例。
一个简单的服务器示例：
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Date;
public class Server
{
public static void main(String[] args) throws Exception
{
ServerSocket listener = new ServerSocket(4000);
String line;
try
{
while (true)
{
Socket socket = listener.accept();
BufferedReader readerChannel = new BufferedReader(new InputStreamReader(socket.getInputStream()));
BufferedWriter writerChannel = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
try
{
writerChannel.write(new Date().toString() + "\n\r");
writerChannel.flush();
while ((line = readerChannel.readLine()) != null)
{
System.out.println(line);
}
}
finally
{
socket.close();
}
}
}
finally
{
listener.close();
}
}
}
一个简单的客户端示例：
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.Socket;
import java.util.Date;
public class Client
{
public static void main(String[] args) throws Exception
{
Socket socket = new Socket("127.0.0.1", 4000);
BufferedWriter writerChannel = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
BufferedReader readerChannel = new BufferedReader(new InputStreamReader(socket.getInputStream()));
String line;
writerChannel.write(new Date().toString() + "\n\r");
writerChannel.flush();
while ((line = readerChannel.readLine()) != null)
{
System.out.println(line);
}
}
}
另请看：
import javax.net.ssl.SSLSocket;
import javax.net.ssl.SSLSocketFactory;
public class Client
{
public static void main(String[] args) throws Exception
{
SSLSocketFactory socketBuilder = (SSLSocketFactory) SSLSocketFactory.getDefault();
SSLSocket socket = (SSLSocket) socketBuilder.createSocket("127.0.0.1", 4000);
}
}
一个简单的 IRC 示例：
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import javax.net.ssl.SSLSocket;
import javax.net.ssl.SSLSocketFactory;
public class Client
{
public static void main(String[] args) throws Exception
{
SSLSocketFactory socketBuilder = (SSLSocketFactory) SSLSocketFactory.getDefault();
SSLSocket socket = (SSLSocket) socketBuilder.createSocket("irc.freenode.net", 6697);
BufferedWriter writerChannel = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
BufferedReader readerChannel = new BufferedReader(new InputStreamReader(socket.getInputStream()));
String line, computerName, nick, login, channel = "#bot", channelPassword = "";
long id = 1;
computerName = java.net.InetAddress.getLocalHost().getHostName();
nick = computerName + "_" + id;
login = computerName + "_" + id;
writerChannel.write("NICK " + nick + "\r\n"); // Join IRC with a specific Nick
writerChannel.write("USER " + login + " 8 * :" + login + " \r\n"); // Join IRC with a specific User
writerChannel.flush();
while ((line = readerChannel.readLine()) != null)
{
if (line.indexOf("004") != -1) // If connected
{
break;
}
else if (line.indexOf("433") != -1) // If Nick already in use
{
id++;
nick = computerName + "_" + id;
login = computerName + "_" + id;
writerChannel.write("NICK " + nick + "\r\n");
writerChannel.write("USER " + login + " 8 * :" + login + " \r\n");
writerChannel.flush();
}
}
writerChannel.write("JOIN " + channel + " " + channelPassword + "\r\n"); // Join a channel
writerChannel.flush();
while ((line = readerChannel.readLine()) != null)
{
try
{
line = line.substring(line.indexOf("#"));
channel = line.substring(0, line.indexOf(" "));
if (line.toLowerCase().startsWith("ping")) // avoid ping time-out
{
writerChannel.write("PONG :" + line.substring(5) + "\r\n");
writerChannel.flush();
}
else if (line.toLowerCase().contains("!ping"))
{
writerChannel.write("PRIVMSG " + channel + " :pong\r\n");
writerChannel.flush();
}
else if (line.toLowerCase().contains("!join"))
{
String newChannel = line.substring(line.indexOf("!join") + 6);
int stringPosition;
if ((stringPosition = newChannel.indexOf(" ")) != -1)
{
String newPassword = newChannel.substring(stringPosition + 1);
newChannel = newChannel.substring(0, stringPosition);
writerChannel.write("JOIN " + newChannel + " " + newPassword + "\r\n");
writerChannel.flush();
}
else
{
writerChannel.write("JOIN " + newChannel + "\r\n");
writerChannel.flush();
}
}
else if (line.toLowerCase().contains("!leave"))
{
writerChannel.write("PART " + channel + "\r\n");
writerChannel.flush();
}
else if (line.toLowerCase().contains("!quit"))
{
writerChannel.write("QUIT\r\n");
writerChannel.flush();
System.exit(0);
}
}
catch (Exception e)
{
}
}
}
}
我不能给你一个点对点网络的例子，因为我从来没有这样做过。这真的很难，你必须在互联网上做很多研究。
更多信息：
https://docs.oracle.com/javase/7/docs/api/java/net/Socket.html
您需要一个多线程服务器来处理许多不同的连接。
提示 - 我已经回答了一些类似的问题。即使编程语言有时不同，我给你链接，逻辑总是相同的，所以它可能会帮助你：
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