我在 java 中开发了一个客户端-服务器游戏（称为“SET”）。
在调试过程中，我遇到了一个非常尴尬的问题：
如果我在同一台机器上同时运行客户端和服务器（客户端连接到本地主机），游戏运行得非常好（如果我同时运行服务器和很多客户端）。
但是，如果我在两台不同的机器上运行客户端和服务器，那么客户端和服务器都会挂在 Inputstream readLine 方法中。
我会提到我正在使用 writeBytes 方法来写入数据，但我总是用 \n 完成一个数据行（如前所述，系统在一台机器上完美运行！）
系统架构如下：
public SetServer(){
this.deck = initCardsList();
Collections.shuffle(this.deck);
shownCards = new Card[12];
for(int i = 0; i<12; i++){
Card c = this.deck.removeFirst();
shownCards[i]=c;
}
while(!isSetOnTable()){
Card c = this.deck.removeFirst();
this.deck.addLast(shownCards[0]);
shownCards[0]=c;
}
playersQueue = new LinkedList<String>();
clients = new LinkedList<ServerOperation>();
try{
ServerSocket welcomeSocket = new ServerSocket(6789);
while(true)
{
if(currNumOfPlayers<5){
System.out.println("Waiting for connection...");
Socket connectionSocket = welcomeSocket.accept();
String line = (new BufferedReader(new InputStreamReader(connectionSocket.getInputStream()))).readLine();
currNumOfPlayers++;
playersQueue.addLast(line);
ServerOperation client = new ServerOperation(connectionSocket,this, line);
clients.add(client);
Thread t = new Thread(client);
t.start(); //<--- This thread listens to client's request
notifyPlayersAdded(line,new DataOutputStream(connectionSocket.getOutputStream())); //<-----This method sends 3 lines of data
}
}
}
catch(Exception e){
System.out.println(e.getMessage());
}
}
ServerOperation 的运行方法：
public void run(){
if(socket==null){
return;
}
else{
try{
// this.out.writeBytes("NewConnection:" + this.parent.STATUS+"\n");
// this.parent.notifyCards();
while(true){
String line = this.br.readLine();
String command = line.split(":")[0];
if(command.equals("SetRequest")){
String[] cards = line.substring(line.indexOf(':')+1).split(" ");
Card c1,c2,c3;
c1 = new Card(
CardShape.values()[(int)(cards[0].charAt(3)-'0')],
CardNumber.values()[(int)(cards[0].charAt(2)-'0')],
CardFill.values()[(int)(cards[0].charAt(1)-'0')],
CardColor.values()[(int)(cards[0].charAt(0)-'0')]);
c2 = new Card(
CardShape.values()[(int)(cards[1].charAt(3)-'0')],
CardNumber.values()[(int)(cards[1].charAt(2)-'0')],
CardFill.values()[(int)(cards[1].charAt(1)-'0')],
CardColor.values()[(int)(cards[1].charAt(0)-'0')]);
c3 = new Card(
CardShape.values()[(int)(cards[2].charAt(3)-'0')],
CardNumber.values()[(int)(cards[2].charAt(2)-'0')],
CardFill.values()[(int)(cards[2].charAt(1)-'0')],
CardColor.values()[(int)(cards[2].charAt(0)-'0')]);
this.parent.checkIfSetAndNotify(c1,c2,c3,this.playerId);
}
}
}
catch(Exception e){
System.out.println(e.getMessage());
}
}
客户代码：
public SetClient()
{
String sentence;
this.myCards = new LinkedList<Card>();
try{
String modifiedSentence;
BufferedReader inFromUser = new BufferedReader( new InputStreamReader(System.in));
clientSocket = new Socket("10.0.0.3", 6789);
DataOutputStream outToServer = new DataOutputStream(clientSocket.getOutputStream());
BufferedReader inFromServer = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
outToServer.flush();
String name = sayHelloAndGetUserName();
outToServer.writeBytes(name);
outToServer.flush();
sentence = inFromServer.readLine();
sayWelcome(sentence);
ClientOperation clnOper = new ClientOperation(clientSocket,this);
Thread t = new Thread(clnOper);
t.start(); //<---this thread listens to the server for messages (suppose
//to catch the first 3 lines. In practice, catches only the first one.
while(!GameOver)
{
try{
BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); //<-----listens to the user's input
String line = br.readLine();
String[] choices = line.split(" ");
int c1 = Integer.parseInt(choices[0]);
int c2 = Integer.parseInt(choices[1]);
int c3 = Integer.parseInt(choices[2]);
sendSetMessage(outToServer,c1,c2,c3);
}
catch(Exception ex){
System.out.println("Error listening to system.in...");
}
}
}
catch(Exception e){
System.out.println(e.getMessage());
}
}
ClientOperation 的代码：
public void run()
{
if(socket==null){
return;
}
else{
try{
this.br = new BufferedReader(new InputStreamReader(socket.getInputStream()));
while(true){
String line = this.br.readLine();
String command = line.split(":")[0];
String value = line.split(":")[1];
if (command.equalsIgnoreCase("Deck"))
{
ConvertStringToCards(value);
this.parent.PopulateCards(shownCards);
}
else if (command.equalsIgnoreCase("Points"))
{
System.out.println("Points: " + value);
}
else if(command.equalsIgnoreCase("NewPlayer")){
System.out.println(value + " has joined the game !\n");
}
else if(command.equalsIgnoreCase("Hint")){
this.parent.printHint(ConvertStringToHint(value));
}
}
}
catch(Exception e){
System.out.println(e.getMessage());
}
}
}
一般来说，客户端服务器项目将在 1 台机器上完美运行，但会挂在 2 台不同的机器上的原因可能是什么？
PS当我在不同的机器上逐步调试客户端和服务器时，它也可以完美运行。
提前致谢，