java socket怎么写客户端向服务器发一堆话，服务器可以反馈发送的信息

客户端

import java.io.*;

import java.net.*;

import java.util.Scanner;

class Receive implements Runnable

{

	private Socket Read;

	private DataInputStream input=null;

	public Receive(Socket R) throws IOException

	{

		Read=R;

		input=new DataInputStream(Read.getInputStream());

	}

	@Override

	public void run() 

	{

		String r;

		try 

		{

			while((r=input.readLine())!=null)

			{

				System.out.println(r);

			}

		} 

		catch (IOException e)

		{

			e.printStackTrace();

		}

		try 

		{

			Read.close();

		} 

		catch (IOException e) 

		{

			e.printStackTrace();

		}

	}

}

public class Client 

{

	private Socket connection;

	private PrintWriter output;

	private DataInputStream input;

	public void connect(InetAddress add) throws IOException

	{

		connection=new Socket(add,Server.port);

	}

	public void start() throws IOException

	{

		output=new PrintWriter(connection.getOutputStream());

		input=new DataInputStream(connection.getInputStream());

		Scanner s=new Scanner(System.in);	

		Receive receive=new Receive(connection);

		Thread t=new Thread(receive);

		t.start();

		String send;

		while(true)

		{

			send=s.nextLine();

			output.write(send);

			output.flush();

			if(send.equals("end"))

				break;

		}

	}

	public static void main(String[] args) throws IOException

	{

		Client c=new Client();

		c.connect(InetAddress.getLoopbackAddress());

		c.start();

	}

}

服务器

import java.io.*;

import java.net.*;

import java.util.ArrayList;

class ServerThread extends Thread

{

	private Socket ThisSocket=null;

	private PrintWriter output=null;

	private DataInputStream input=null;

	public ServerThread(Socket This) throws IOException

	{

		ThisSocket=This;			

		output=new PrintWriter(ThisSocket.getOutputStream());

		input=new DataInputStream(ThisSocket.getInputStream());

	}

	public void run()

	{

		String recv;

		try

		{

			while((recv=input.readLine())!=null)

			{

		

				System.out.println("客户端发来信息:"+recv);

				output.write("服务器端已接受信息"+recv);

				if(recv.equals("end"));

					break;

			}

		} 

		catch (IOException e) 

		{

			e.printStackTrace();

		}

		finally

		{

			try 

			{

				input.close();

	            output.close();

	            Server.socketgroup.remove(ThisSocket);

				ThisSocket.close();

			}

			catch (IOException e)

			{

				e.printStackTrace();

			}

		}

	}

}

public class Server

{

	private ServerSocket server;

	public static ArrayList<Socket> socketgroup;

	public static final int port=1920;

	public Server() throws IOException

	{

		server=new ServerSocket(port);

		socketgroup=new ArrayList<Socket>();

	}

	public void running() throws IOException

	{

		while(true)

		{

			Socket connection=server.accept();

			socketgroup.add(connection);

			new ServerThread(connection).start();

		}

	}

	public static void main(String[] args) throws IOException

	{

		new Server().running();

	}

}

错哪里。。一直Connection reset
at java.net.SocketInputStream.read(Unknown Source)
at java.net.SocketInputStream.read(Unknown Source)
at java.net.SocketInputStream.read(Unknown Source)
at java.io.DataInputStream.readLine(Unknown Source)
at ServerThread.run(Server.java:22)