Question

服务器代码：

public class server {
//private static ArrayList<user> t = new ArrayList<>();
public static  Socket s = null;
public static ServerSocket ss = null;
public static void main(String[] args) {
    try {
         ss = new ServerSocket(1777);
        while (true) {
            System.out.println("waiting for connexion");
             s = ss.accept();
           System.out.println("connected with "+s.getRemoteSocketAddress());
            InputStream is = s.getInputStream();
            OutputStream os = s.getOutputStream();
            InputStreamReader isr = new InputStreamReader(is);  
            BufferedReader br = new BufferedReader(isr);
            PrintWriter pw = new PrintWriter(os,true);
            String username = br.readLine();             
            int number = 0;
            user us = new user(s,number,username);
            //t.add(us);
            pw.print(us);
           //new service(s,username,number,t).start();
           new service(s,us).start();
            number++;
        }
    } catch (Exception e) {
        System.out.println(e.getMessage());                        
    }
} 
}

服务类代码：

public class service extends Thread {
private static Socket s;
private static String user;
private  static int number ; 
private  ArrayList<user> locallist = new ArrayList<user>();
private static user us;

public service(Socket s,user u){
    this.s = s;
    this.us = u;
    locallist.add(u);
}
@Override
public void run() {
    int listsize = locallist.size();
     user lastuser = locallist.get(listsize-1);
    try {
        while (true) {
            InputStream is = s.getInputStream();
            OutputStream os = s.getOutputStream();
            InputStreamReader isr = new InputStreamReader(is);  
            BufferedReader br = new BufferedReader(isr);
            PrintWriter pw = new PrintWriter(os,true);
            System.out.println("last user : " + lastuser);
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}    
}

客户端类代码：

public class client {
public static void main(String[] args) {

    try {
        while (true) {
        Socket s = new Socket("localhost",1777);
        System.out.println("connected with localhost");
        InputStream is = s.getInputStream();
        OutputStream os = s.getOutputStream();
        InputStreamReader isr = new InputStreamReader(is);  
        BufferedReader br = new BufferedReader(isr);
        PrintWriter pw = new PrintWriter(os,true);
        Scanner e = new Scanner(System.in);
        System.out.println("enter you username to continue");
        String username = e.next();
        pw.println(username);
        }
    } catch (Exception ex) {
        ex.printStackTrace();
    }
}
}

服务器输出：

waiting for connexion
connected with /127.0.0.1:51899
waiting for connexion
connected with /127.0.0.1:51902
last user : username teste usernumber 0
last user : username teste usernumber 0
last user : username teste usernumber 0

基本上是无限循环

客户端输出：

connected with localhost
enter you username to continue
teste
connected with localhost
enter you username to continue

我的问题是如何在每次客户端连接后停止无限循环并显示最后连接/添加的成员

Answer 1

在服务器类中：

classes

在服务类中：

public static void main(String[] args) {
    try {
        ss = new ServerSocket(1777);

        int number = 0; // <--- place the counter here not in the while
        while (true) {
            System.out.println("waiting for connexion");
            s = ss.accept();
            System.out.println("connected with "+s.getRemoteSocketAddress());
            InputStream is = s.getInputStream();
            OutputStream os = s.getOutputStream();
            InputStreamReader isr = new InputStreamReader(is);
            BufferedReader br = new BufferedReader(isr);
            PrintWriter pw = new PrintWriter(os,true);
            String username = br.readLine();
            //int number = 0; // Not here ... you just set the counter always to 0
            user us = new user(s,number,username);
            pw.print(us);
            new service(s,us).start();
            number++;
        }
    } catch (Exception e) {
        System.out.println(e.getMessage());
    }
}

这就是完成的代码......你只需要在服务类中删除while，移动计数器变量＆＃34; number＆＃34;在服务器类中不合时宜。

如果您希望稍后在服务级中使用while进行服务器和客户端之间的通信，则只需在打印用户之后放置一段时间。

使用Java Thread显示ArrayList

1 个答案: