一直试图弄清楚这个问题了约5个小时，但似乎无法看到它，尽管所有的步骤完成发送数据，我只能接收邮件服务器，而不是从服务器到客户端。 我在建筑/学习如何在命令行做一个聊天客户端程序的早期阶段。 以下是服务器代码：
该CServer类：
public class CServer {
private static int port=2008, maxConnections=0;
private static String shutDownServer = "no";
public static void main(String[] args) throws IOException{
ServerSocket listen = new ServerSocket(port);
Socket server;
while(shutDownServer.equalsIgnoreCase("no")){
doComm connection;
System.out.println("\nWaiting for clients to connect...");
server = listen.accept(); // accept incomming connections from client
System.out.println("Client connected. Location: " + server.getInetAddress().getHostName());
connection = new doComm(server);
Thread thread = new Thread(connection);
thread.start();
}
}
public void shutDownServer(String command){
this.shutDownServer = command;
}
}
现在doComm类来处理每个客户端螺纹：
public class doComm implements Runnable{
Socket server;
private String clientData;
public doComm(Socket server){
this.server = server;
}
public void run(){
try {
BufferedReader fromClient = new BufferedReader(new InputStreamReader(server.getInputStream()));
DataOutputStream toClient = new DataOutputStream(server.getOutputStream());
clientData = fromClient.readLine();
System.out.println("Client sent: "+clientData);
（（-imo-可以是该语句的问题：））
toClient.writeBytes("Recieved your sentence '"+clientData+"' and more to come :)!");
//server.close();
} catch (IOException e) {
System.out.println("IOException on socket listen: " + e);
e.printStackTrace();
}
}
}
现在，客户端类CClient：
public class CClient {
static String address = "localhost";
static int port = 4444;
static Socket echoSocket;
public CClient(int port, String addr){
changePort(port);
changeAddr(addr);
}
public static void main(String[] args) throws IOException, UnknownHostException{
Scanner scan = new Scanner(System.in);
System.out.println("Please enter the port to connect to: ");
int temp_port = Integer.parseInt(scan.nextLine());
System.out.println("Please enter the address of server: ");
System.out.flush();
String temp_addr = scan.nextLine();
CClient client = new CClient(temp_port,temp_addr);
PrintWriter out = null;
BufferedReader in = null;
try{
System.out.flush();
echoSocket = new Socket(address,port);
out = new PrintWriter(echoSocket.getOutputStream(), true);
in = new BufferedReader(new InputStreamReader(echoSocket.getInputStream()));
}
catch(IOException e){
System.err.println("IOException error: " + e.getStackTrace());
}
BufferedReader stdIn = new BufferedReader(new InputStreamReader(System.in));
String userInput;
while ((userInput = stdIn.readLine()) != null) {
out.println(userInput);
System.out.println("thingy prints right after this...");
（（或在这里：））
System.out.println("echo: " + in.readLine());
}
}
public void changePort(int port){
this.port=port;
}
public void changeAddr(String addr){
this.address=addr;
}
}
