菜鸟问,高手答!!

Question

基于TCP的Socket编程,我想在客户端通过键盘输入一个用户名,然后把这个值发送到服务器,并在服务器端输出,然后服务器发送一句欢迎信息到客户端,并在客户端显示出来!我写的这个编译也能通过,可是执行的时候在客户端一输入一个值,然后就没有反应了,没有实现设想的功能,请问这个是怎么回事!!
服务器:
import java.io.*;
import java.net.*;
class server
{
public static void main(String[] args)
{
try
{
ServerSocket server=new ServerSocket(9999);
Socket s=server.accept();
BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));
BufferedReader in=new BufferedReader(new InputStreamReader(s.getInputStream()));
String name=in.readLine();
System.out.println(name);
bw.write("欢迎光临"+name+"JAVA世界");
bw.close();
s.close();
}
catch(Exception e)
{
e.printStackTrace();
}
}
} 
客户端:
import java.io.*;
import java.net.*;class client
{
public static void main(String[] args)
{
try
{
Socket c=new Socket(InetAddress.getLocalHost(),9999);
  BufferedReader in=new BufferedReader(new InputStreamReader(c.getInputStream()));
BufferedWriter out = new BufferedWriter(new OutputStreamWriter(c.getOutputStream()));
System.out.println("请输入用户名：");
BufferedReader here=new BufferedReader(new InputStreamReader(System.in));
  String name=here.readLine();
out.write(name);
String fromserver=in.readLine();
  System.out.println(fromserver);
}
catch(Exception e)
{
e.printStackTrace();
}
}
}

Answer 1

楼主建立在accept后加个循环语句就可以了，比如：
while(true){
你想做的事情。
}

Answer 2

ServerSide:
import java.net.*;
import java.util.*;
import java.io.*;public class Server
{
public static final int DEFAULT_PORT = 9999;
private ServerSocket myServerSocket;
private Bank  bank;
private Hashtable myCustomerDatabase;

public Server()
{
bank = new Bank ("Bank of Monash");
myCustomerDatabase = new Hashtable();
for (int i=0; i < bank.getCustomers().size(); i++)
myCustomerDatabase.put(Integer.toString(i), bank.getCustomers().get(i));
startServer();
}

private void startServer()
{   myServerSocket = null;
        try {
            myServerSocket = new ServerSocket(DEFAULT_PORT);
        } catch (IOException e) {
            System.err.println("Could not listen on port: "+DEFAULT_PORT);
            System.exit(1);
        }        Socket clientSocket = null;
        try {
            clientSocket = myServerSocket.accept();
        } catch (IOException e) {
            System.err.println("Accept failed.");
            System.exit(1);
        }try{   PrintWriter out = new PrintWriter(clientSocket.getOutputStream(), true);
        BufferedReader in = new BufferedReader(
new InputStreamReader(
clientSocket.getInputStream()));
        String inputLine, outputLine;
        outputLine =null;
        out.println(outputLine);
        System.out.println("**** Listening for socket");
        while (true) {
          if((inputLine = in.readLine()) == null)
          continue;
             else{outputLine = retrieveDatabase(inputLine);
             out.println(outputLine);
             if(!outputLine.equalsIgnoreCase("Customer Not Found - exit"))
             {System.out.println("**** Recevied Request : "+inputLine);
             System.out.println("**** Response to the Client : "+outputLine);
             System.out.println("#########################################");
             System.out.println("**** Listening for socket");
        }
        }
        }
        }
    catch (IOException eee){
     System.out.println(eee);
    }}
private String retrieveDatabase(String id)
{   Object result = null;
result = myCustomerDatabase.get(id);
if (result == null)
return "Customer Not Found - " + id;
return result.toString();
} public static void main(String[] args)
{
new Server();
}
}
ClientSide:
import java.net.*;
import java.io.*;public class Client
{
public static final int  DEFAULT_PORT = 9999;
public static final String DEFAULT_HOST = "localhost";

private BufferedReader myKeyboardReader = null;

public Client()
{
myKeyboardReader = new BufferedReader(new InputStreamReader(System.in)); startClient();
}

private void startClient()
{
Socket kkSocket = null;
        PrintWriter out = null;
        BufferedReader in = null;        try {
            kkSocket = new Socket(DEFAULT_HOST, DEFAULT_PORT);
            out = new PrintWriter(kkSocket.getOutputStream(), true);
            in = new BufferedReader(new InputStreamReader(kkSocket.getInputStream()));
        } catch (UnknownHostException e) {
            System.err.println("Don't know about host: "+DEFAULT_HOST+".");
            System.exit(1);
        } catch (IOException e) {
            System.err.println("Couldn't get I/O for the connection to: "+DEFAULT_PORT+".");
            System.exit(1);
        }  try{  BufferedReader stdIn = new BufferedReader(new InputStreamReader(System.in));
        String fromServer;
        String fromUser;
        boolean whetherPrint=false;
        while ((fromServer = in.readLine()) != null) {
            if(whetherPrint){System.out.println("**** Response from the Server : " + fromServer);
            System.out.println();
            System.out.println("#######################################");
            }
            whetherPrint=true;
            System.out.print("**** Please input a Customer id : ");
        fromUser = stdIn.readLine();
    if (fromUser != null) {
            out.println(fromUser);
    }
    if(fromUser.equalsIgnoreCase("exit")){
     break;
    }
        }
        out.close();
        in.close();
        stdIn.close();
        kkSocket.close();}
        catch(IOException ee){
        }
    }
public static void main(String[] args)
{
new Client();
}
}
AccoutClass:
public class Account
{
    private float balance = 0.0F;    public Account()
      {
      }    public Account(float initialBalance)
      {
  balance = initialBalance;
      }    public void deposit(float amount)
      {
  balance += amount;
      }    public boolean withdraw(float amount)
      {
  if (balance - amount >= 0)
    {
balance -= amount;
return true;
    }
  else
    return false;
      }    public float getBalance()
      {
  return balance;
      }
}
BankClass:
import java.util.*;public class Bank
{
    private ArrayList customers = new ArrayList();
    private String name;    public Bank(String name)
    {
this.name = name;
ArrayList customers = new ArrayList();
        Customer me = new Customer("Chris Ling", 10000);
customers.add(me);
        customers.add(new Customer("Eddie Leung", 12000));
customers.add(new Customer("Wojtek Goscinski", 14000));
this.customers = customers;
    }    public ArrayList getCustomers()
    {
return customers;
    }

}
CustomClass:
public class Customer
{
    private Account myAccount = null;
    private String name = "";    public Customer(String name, float initialBalance)
      {
  this.name = name;
  myAccount = new Account(initialBalance);      }    public void process()
      {
  System.out.println("The customer is " + name);
  System.out.println("Initial balance = " + myAccount.getBalance());
  myAccount.deposit(5000);
  System.out.println("Balance = " + myAccount.getBalance());
  if (myAccount.withdraw(10000))
    System.out.println("Balance = " + myAccount.getBalance());
    
      }    public String toString()
{ 
    return name + " " + myAccount.getBalance();
}
}

Answer 3

out.write(name);
错了
要用
out.println();对应的in.readLine()sever写一行println
client对应读一行readLine代码下载http://my.6cncn.cn