import java.io.*; 
import java.net.*; 
/* 
*客戶(hù)端 
*/ 
class client 
{ 
 public static void main(String[] args) throws Exception 
 { 
  Socket s = new Socket("192.168.33.1",10008);//建立服務(wù) 
  BufferedReader bufr = new BufferedReader(new InputStreamReader(System.in));//讀取鍵盤(pán)輸入用戶(hù)名 
  PrintWriter pw = new PrintWriter(s.getOutputStream(),true);//讀到數(shù)據(jù)往服務(wù)端寫(xiě) 
  BufferedReader bufin = 
   new BufferedReader(new InputStreamReader(s.getInputStream()));//將客戶(hù)端返回的數(shù)據(jù)讀入 
  for(int x = 0;x < 3; x ++)//只登陸3次設(shè)定 
  { 
   String line = bufr.readLine();//讀取用戶(hù)名 
   pw.println(line); 
   if(line == null)//為空用戶(hù)名終止 
    break; 
   pw.println(line); 
   String info = bufin.readLine();//讀取服務(wù)端返回的數(shù)據(jù) 
   System.out.println("Server info:"+info); 
   if(info.contains("歡迎登陸"))//用戶(hù)登錄終止 
    break; 
  } 
  bufr.close(); 
  s.close(); 
 } 
} 
/* 
*服務(wù)端 
*/ 
class ServerThread implements Runnable 
{ 
 private Socket s; 
 ServerThread(Socket s) 
 { 
  this.s = s; 
 } 
 public void run() 
 { 
  String ip = s.getInetAddress().getHostAddress(); 
  System.out.println(ip+"...........connect"); 
  try 
  { 
   for(int x = 0;x < 3;x ++) 
   { 
    BufferedReader bufin = new BufferedReader(new InputStreamReader(s.getInputStream()));//讀取客戶(hù)端發(fā)送的數(shù)據(jù) 
    String name = bufin.readLine(); 
    if(name == null) 
     break; 
    BufferedReader bufr = new BufferedReader(new FileReader("user.txt"));//讀取已存入用戶(hù)賬戶(hù)，本來(lái)是讀取數(shù)據(jù)庫(kù)，這里方便就寫(xiě)了一個(gè)文本 
    PrintWriter out = new PrintWriter(s.getOutputStream(),true);//寫(xiě)入流，服務(wù)端寫(xiě)出 
    String line = null; 
    boolean flag = false;//判斷標(biāo)記 
    while((line = bufr.readLine())!= null)//讀取數(shù)據(jù)庫(kù)(Use.txt)中數(shù)據(jù) 
    { 
     if(line.equals(name))//如果數(shù)據(jù)庫(kù)和讀取用戶(hù)名相同，則終止 
     { 
      flag = true; 
      break; 
     } 
    } 
    if(flag) 
     { 
      System.out.println(name+":已登錄"); 
      out.println(name+":歡迎登陸"); 
      break; 
     } 
    else 
    { 
     System.out.println(name+":嘗試登陸"); 
     out.println(name+":用戶(hù)名不存在"); 
    } 
   } 
   s.close(); 
  } 
  catch (Exception e) 
  { 
   throw new RuntimeException("驗(yàn)證失敗"); 
  } 
 } 
} 
class server 
{ 
 public static void main(String[] args) throws Exception 
 { 
  ServerSocket ss = new ServerSocket(10008);//建立服務(wù) 
  while (true) 
  { 
   Socket s = ss.accept();//接收客戶(hù)端傳來(lái)數(shù)據(jù) 
   new Thread(new ServerThread(s)).start();//開(kāi)啟線(xiàn)程 
  } 
 } 
}