我正在尝试构建一个网络版的Battleship，并且遇到了一个问题，我的服务器似乎没有接收到客户端的请求，或者服务器在发送响应时遇到问题给客户。我所知道的是我的服务器在accept（）上执行一个新线程，但不幸的是我不知道在那之后出了什么问题。我无法找到使用eclipse调试新线程的方法。下面是我目前为我的三个班级编写的代码。假设客户输入1以请求查看可用游戏列表。客户端在等待响应时挂起。服务器应该打开case＆＃34; list＆＃34;。对我出错的地方有任何帮助都很棒。
public class Server {
//global variables for clients to call whenever
public static ArrayList<Socket> ClientArray = new ArrayList<Socket>();
public static ArrayList<String> ClientNameArray = new ArrayList<String>();
public static ArrayList<Socket> WaitingClients = new ArrayList<Socket>();
public static ArrayList<String> WaitingPlaterNames = new ArrayList<String>();
public static void main(String[] args){
try {
final int PORT = 7334;
ServerSocket SERVER = new ServerSocket(PORT);
System.out.println("waiting on client connections");
//infinite accept
while(true){
Socket sock = SERVER.accept();
ClientArray.add(sock);
System.out.println("Client added");
addName(sock);
ServerGame serverSide = new ServerGame(sock);
serverSide.start();
}
} catch (IOException e) {
e.printStackTrace();
}
}
private static void addName(Socket sock){
try {
BufferedReader input = new BufferedReader(new InputStreamReader(sock.getInputStream()));
String user = input.readLine();
ClientNameArray.add(user);
} catch (IOException e) {
e.printStackTrace();
}
}
}
然后ServerGame：
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
public class ServerGame extends Thread {
private Socket sock;
private BufferedReader input = null;
private PrintWriter out = null;
String commandMessage = "";
public ServerGame(Socket sock) {
this.sock = sock;
}
private void checkConnection() {
if (!sock.isConnected()) {
//if not connected anymore remove from client list
for (int i = 0; i < Server.ClientArray.size(); i++) {
if (Server.ClientArray.get(i) == sock) {
Server.ClientArray.remove(i);
Server.ClientNameArray.remove(i);
}
}
//check if client started new game and is waiting. If so
//remove them from that list too
for(int j = 0; j < Server.WaitingClients.size(); j++){
if(Server.WaitingClients.get(j) == sock){
Server.WaitingClients.remove(j);
Server.WaitingPlaterNames.remove(j);
}
}
}
}
private void parseAndSend(String commandMessage) {
boolean found = false;
String[] message = commandMessage.split("\\s+");
// 3rd argument in message is always the command
switch (message[2]) {
// initial inquiry cases
case "list":
String inquiry;
if(Server.WaitingPlaterNames.size() != 0){
inquiry = "Available Games: " + Server.WaitingPlaterNames;
}
else{
inquiry = "No Available Games";
}
try {
out = new PrintWriter(sock.getOutputStream());
out.println(inquiry);
} catch (IOException e1) {
e1.printStackTrace();
}
break;
case "newgame":
break;
case "join":
break;
// game commands
case "connection":
// make output to other player's socket
for (int i = 0; i < Server.ClientArray.size(); i++) {
if (Server.ClientNameArray.get(i).equals(message[1])) {
try {
// set outputstream to other player's socket
out = new PrintWriter(Server.ClientArray.get(i)
.getOutputStream());
found = true;
} catch (IOException e) {
e.printStackTrace();
}
}
}
// if you didn't find the player send back to sender fail
if (!found) {
try {
out = new PrintWriter(sock.getOutputStream());
String failMessage = "attempt connection failure";
out.println(failMessage);
return;
} catch (IOException e) {
e.printStackTrace();
}
}
// is this a request or confirmation?
if (message[3].equals("request")) {
String sendMessage = message[0] + " " + message[1]
+ " connection request";
// send it to opponent's socket
out.println(sendMessage);
return;
} else { // finalization from other side to server
String sendMessage = message[0] + " " + message[1]
+ " connection finalized";
out.println(sendMessage);
return;
}
case "move":
break;
case "chat":
break;
case "failure":
break;
default:
return;
}
out.flush();
}
@Override
public void run() {
try {
input = new BufferedReader(new InputStreamReader(sock.getInputStream()));
commandMessage = input.readLine();
System.out.println("Command Message Received : " + commandMessage);
while (!commandMessage.equals("DISCONNECT")) {
checkConnection();
parseAndSend(commandMessage);
commandMessage = input.readLine();
}
} catch (IOException e) {
e.printStackTrace();
}
finally {
try {
System.out.println("Closing Connection...");
if (null != input) {
input.close();
}
if (null != out) {
out.close();
}
if (null != sock) {
sock.close();
System.out.println("Socket Closed.");
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
最后我的客户：
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;
public class Client {
public static void main(String[] args){
InetAddress address = null;
Socket socket = null;
String commandMessage = "";
String myUsrname = "";
String opponentName = "";
BufferedReader input = null;
PrintWriter out = null;
BufferedReader myInput = null;
final int PORT = 7334;
try {
//get my address for socket
address = InetAddress.getLocalHost();
} catch (UnknownHostException e) {
e.printStackTrace();
}
System.out.println("Welcome to BattleCarrier! (BattleShip was taken)");
System.out.println("************************************************");
System.out.println("************************************************");
System.out.println();
System.out.println("To Register, please type in a Username.");
myInput = new BufferedReader(new InputStreamReader(System.in));
String consoleCommand = "";
while(consoleCommand.equals("")){
try {
consoleCommand = myInput.readLine();
if(consoleCommand.equals("")){
System.out.println("How about a real username???");
continue;
}
myUsrname = consoleCommand;
System.out.println("Your Username has been set to " + myUsrname + ".");
System.out.println("Setting up a connection with the server...");
//set up the socket
if(null != address){
socket = new Socket(address, PORT);
input = new BufferedReader(new InputStreamReader(socket.getInputStream()));
out = new PrintWriter(socket.getOutputStream());
System.out.println("Client Address: " + address);
System.out.println("Connection Established with Server");
}
} catch (IOException e) {
System.out.println("Server may not be reachable. Please Try again later.");
System.out.println("Goodbye.");
System.exit(0);
}
}
System.out.println();
System.out.println("Please choose from the following commands:");
System.out.println("*********************************************************");
System.out.println("Type: 1 for available games.");
System.out.println("Type: 2 to start a new game.");
System.out.println("Type: 3 to join someone else.");
System.out.println("*********************************************************");
System.out.println("Type: \"DISCONNECT\" at any time to unregister and quit.");
System.out.println("*********************************************************");
try {
consoleCommand = myInput.readLine();
while(!consoleCommand.equals("DISCONNECT")){
switch(consoleCommand){
case("1"):
System.out.println("1 was selected");
String inquiry = ". . list";
out.println(inquiry);
break;
case("2"):
break;
case("3"):
break;
default:
System.out.println("Not a valid command. Please try again.");
break;
}
if(null != out){
out.flush();
}
String response = input.readLine();
System.out.println("Server Response: " + response);
consoleCommand = myInput.readLine();
}
//write the code for disconnect here
} catch (IOException e) {
e.printStackTrace();
}
}
}
答案 0 :(得分：-1)
addName（袜子）; Server.java中的函数有一个input.readline（）在客户端上等待导致挂起...