我一直在搜索，但根本无法找到办法。问题是一个多用户聊天客户端，它工作正常。我遇到的问题是能够从一个用户向另一个用户发送消息（客户端 - 客户端），而不会将其打印给其他用户。
private static class Handler extends Thread {
Map<String, Socket> database_UID = new HashMap<String, Socket>();
private String name;
private Socket socket;
private BufferedReader in;
private PrintWriter out;
public int users;
private String whisper;
private String pass;
private String pass_err = "Unauthorized login attempt";
public Handler(Socket socket) {
this.socket = socket;
}
public void Append(Socket socket, String name) {
database_UID.put(name, socket);
users++;
System.out.println(ANSI_WHITE + "For reference, the Socket of " + name + " is: " + socket + ANSI_RESET);
// socket.out.println("Welcome!");
}
public void validate(String name_1) {
// With a given name, will validate Admin and TestBot passwords
if (name_1.equals("Zach")) {
out.println("What's your password, admin?");
try {
pass = in.readLine();
} catch (IOException e) {
System.out.println(e);
}
if (pass.equals("1234")) {
name = ANSI_RED + "ADMIN" + ANSI_RESET + " Zach";
Append(socket, name);
} else {
System.out.println(ANSI_WHITE + "Connection at " + socket.getInetAddress().getHostName() + ":" + socket.getPort() + " Has been terminated for:" + ANSI_RESET + " " + ANSI_RED
+ pass_err + ANSI_RESET + "\n");
Removal();
}
} else if (name_1.equals("Test")) {
out.println("What's your password, TestBot?");
try {
pass = in.readLine();
} catch (IOException e) {
System.out.println(e);
}
if (pass.equals("tester")) {
name = ANSI_RED + "TESTER" + ANSI_RESET + " TestBot";
Append(socket, name);
} else {
System.out.println("Connection at " + socket.getInetAddress().getHostName() + ":" + socket.getPort() + " Has been terminated for:" + ANSI_RESET + " " + ANSI_RED + pass_err
+ ANSI_RESET + "\n");
Removal();
}
} else {
Append(socket, name);
}
}
public void Removal() {
if (name != null) {
names.remove(name);
}
if (out != null) {
writers.remove(out);
}
try {
socket.close();
} catch (IOException e) {
}
}
public void run() {
try {
System.out.println(ANSI_WHITE + "Connection received from " + socket.getInetAddress().getHostName() + ":" + socket.getPort() + ANSI_RESET);
in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
out = new PrintWriter(socket.getOutputStream(), true);
while (true) {
out.println("What's your name?");
name = in.readLine();
if (name == null) {
return;
}
if (name.equals("Zach") || name.equals("zach")) {
validate("Zach");
} else if (name.equals("Test") || name.equals("test")) {
validate("Test");
}
System.out.println(ANSI_WHITE + "Connection at " + socket.getInetAddress().getHostName() + ":" + socket.getPort() + " Has the name " + ANSI_RESET + "'" + name + "'\n");
if (socket.getInetAddress().equals("localhost")) {
System.out.println(ANSI_WHITE + "Connection received locally" + ANSI_RESET);
}
synchronized (names) {
if (!names.contains(name)) {
names.add(name);
break;
}
}
}
out.println("Your name has been accepted, " + name);
writers.add(out);
while (true) {
String input = in.readLine();
if (input == null) {
return;
}
for (PrintWriter writer : writers) {
// Allows the user to quit from the server whilst keeping
// the terminal open
if (input != null) {
writer.println("MESSAGE " + name + ": " + input);
if (input.equals("quit")) {
writer.println(ANSI_RED + "SYSTEM: " + ANSI_RESET + "USER " + name + " IS QUITING");
Removal();
// The problem is here
} else if (input.equals("whisper " + name)) {
out.println("Type the message to " + name);
whisper = in.readLine();
out.println(whisper);
} else if (input.equals("help")) {
out.println("\n\nHELP MENU\nTo QUIT: Type '" + ANSI_PURPLE + "quit" + ANSI_RESET + "'\nTo WHISPER: Type '" + ANSI_PURPLE + "whisper name_of_user" + ANSI_RESET + "'");
} else {
writer.println("MESSAGE " + name + ": " + input);
}
}
}
}
} catch (IOException e) {
System.out.println(e);
} finally {
// Removes the user from the list of names
Removal();
}
}
}
我使用的是Thread，当用户加入时，我将他们的名字和Socket都添加到字典中
Map<String, Socket> database_UID = new HashMap<String, Socket>();
public void Append(Socket socket, String name) {
database_UID.put(name, socket);
users++;
System.out.println(ANSI_WHITE+"For reference, the Socket of "+name+" is: "+socket+ANSI_RESET);
//socket.out.println("Welcome!");
}
我想做的是，如评论中所见，socket.out.println(USER'S_MESSAGE);之类的东西，显然不起作用。
如果相关，则将客户端的套接字添加为
public Handler(Socket socket) {
this.socket = socket;
}
tl; dr版本：
人A到整个服务器：嗨！
B人专门针对A人：嗨！
编辑：上面包含整个线程。 for(PrintWriter writer : writers) {就是它所要去的地方，在耳语之下。
答案 0 :(得分：1)
请按照以下步骤操作