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我正在修改关于如何创建接受多个客户端的TCP聊天服务器的教程。我最终还会创建一个客户端类,但到目前为止,我正在使用TELNET进行测试。TCP聊天服务器
我希望服务器不断检查输入,以便我可以使用关键字预先形成服务器功能。因此,字符串单词“EXIT”断开客户端和字符串单词“Name:”以打印“OK”。
这是我在想什么,但它不工作:
public void run()
{
String line;
try
{
while(true)
{
if (input.readline("EXIT"))//Should close and remove client
{
clients.remove(this);
users.remove(name);
break;
}
if(input.readline("Name:"))//Should print OK with username
{
System.out.println("OK");
}
boradcast(name,line); // method of outer class - send messages to all
}// end of while
} // try
catch(Exception e)
{
System.out.println(e.getMessage());
}
} // end of run()
}
}
这里是整个服务器类
// Chat Server runs at port no. 9020
import java.io.*;
import java.util.*;
import java.net.*;
import static java.lang.System.out;
public class TCPServer
{
Vector<String> users = new Vector<String>();
Vector<HandleClient> clients = new Vector<HandleClient>();
int PORT = 9020;
int NumClients = 10;
public void process() throws Exception
{
ServerSocket server = new ServerSocket(PORT,NumClients);
out.println("Server Connected...");
while(true)
{
Socket client = server.accept();
HandleClient c = new HandleClient(client);
clients.add(c);
} // end of while
}
public static void main(String ... args) throws Exception
{
new TCPServer().process();
} // end of main
public void boradcast(String user, String message)
{
// send message to all connected users
for (HandleClient c : clients)
if (!c.getUserName().equals(user))
{
c.sendMessage(user,message);
}
}
class HandleClient extends Thread
{
String name = "";
BufferedReader input;
PrintWriter output;
public HandleClient(Socket client) throws Exception
{
// get input and output streams
input = new BufferedReader(new InputStreamReader(client.getInputStream())) ;
output = new PrintWriter (client.getOutputStream(),true);
output.println("Welcome to Bob's Chat Server!\n");
// read name
output.println("Please Enter a User Name: ");
name = input.readLine();
users.add(name); // add to vector
output.println("Welcome "+name+" we hope you enjoy your chat today");
start();
}
public void sendMessage(String uname,String msg)
{
output.println(uname + ":" + msg);
}
public String getUserName()
{
return name;
}
public void run()
{
String line;
try
{
while(true)
{
if (input.readline("EXIT"))
{
clients.remove(this);
users.remove(name);
break;
}
if(input.readline(name))
{
System.out.println("OK");
}
boradcast(name,line); // method of outer class - send messages to all
}// end of while
} // try
catch(Exception e)
{
System.out.println(e.getMessage());
}
} // end of run()
} // end of inner class
} // end of Server
请根据“*不起作用*”进行展开。编译错误?运行时错误?意外的功能? (你看到什么,与你期望的是什么?) – ziesemer 2012-01-28 19:48:03
现在,这是我编译时得到的结果: TCPServer.java:79:找不到符号 symbol:method readline(java.lang.String ) 位置:类java.io.BufferedReader中 \t \t如果(input.readline( “EXIT”)) \t \t^ TCPServer.java:85:找不到符号 符号:方法的ReadLine(java.lang.String中) 位置:类java.io.BufferedReader中 \t \t如果(input.readline( “姓名:”)) \t \t^ 2错误 – user1174834 2012-01-28 19:57:03
您应该使用“WebSockets”代替聊天服务器。这是现代化的做法。 – djangofan 2012-01-28 20:01:33