Java 客户端-服务器通信，无法让客户端向服务器发送信息

这是我的服务器端代码：

package server;

import java.io.*;
import java.net.*;


public class Serverside 
{
public static void main (String [] args) throws Exception 
{
    System.out.println("The server is running.");
    int clientnumber = 1;
    ServerSocket server = new ServerSocket(9090);
    try
    {
        while (true)
        {
            new cserver(server.accept(), clientnumber++).start();

        }

    }finally
    {
        server.close();
    }

}

private static class cserver extends Thread
{
    private Socket socket;
    private int clientnumber;

    public cserver(Socket socket, int clientnumber)
    {
        this.socket = socket;

        this.clientnumber = clientnumber;
        log("New connection with Client: " + clientnumber + " at " + socket);
    }

    private void log (String message)
    {
        System.out.println(message);
    }

    public void run()
    {
        try
        {
            BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            PrintWriter out = new PrintWriter(socket.getOutputStream(), true);

            //Message for Client
            out.println("Hello, Client# " + clientnumber + ".");
            out.println("Input Line\n");

            while(true)
            {   //System.out.println("Reading from Client\n");
                String input = in.readLine();
            //  out.println(input);
                if (input == null)
                    break;

                out.println(input);
            }
        }catch (IOException e)
        {
                log("Error handling in client#" + clientnumber + ": " + e);
        }finally
        {
            try
            {
                socket.close();
            }catch (IOException e)
            {
                log("Could not close socket");
            }
            log("Connection with Client# " + clientnumber + " closed");
        }


    }
}
}

package client;

import java.io.*;
import java.net.*;



public class clientside
{   public static void main (String [] args) throws IOException
{
    Socket myclient = new Socket("localhost", 9090);
    BufferedReader in = 
            new BufferedReader(new
            InputStreamReader(myclient.getInputStream()));
    PrintWriter out = new PrintWriter(myclient.getOutputStream(), true);
    out.print("Hello server, end session\n");

    for(int i=0;i<=2;i++)
    {
        String input = in.readLine();
        System.out.println(input);
    }

    System.out.println("It is done");

    myclient.close();

}
}

这是我的客户端代码：

package server;

import java.io.*;
import java.net.*;


public class Serverside 
{
public static void main (String [] args) throws Exception 
{
    System.out.println("The server is running.");
    int clientnumber = 1;
    ServerSocket server = new ServerSocket(9090);
    try
    {
        while (true)
        {
            new cserver(server.accept(), clientnumber++).start();

        }

    }finally
    {
        server.close();
    }

}

private static class cserver extends Thread
{
    private Socket socket;
    private int clientnumber;

    public cserver(Socket socket, int clientnumber)
    {
        this.socket = socket;

        this.clientnumber = clientnumber;
        log("New connection with Client: " + clientnumber + " at " + socket);
    }

    private void log (String message)
    {
        System.out.println(message);
    }

    public void run()
    {
        try
        {
            BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            PrintWriter out = new PrintWriter(socket.getOutputStream(), true);

            //Message for Client
            out.println("Hello, Client# " + clientnumber + ".");
            out.println("Input Line\n");

            while(true)
            {   //System.out.println("Reading from Client\n");
                String input = in.readLine();
            //  out.println(input);
                if (input == null)
                    break;

                out.println(input);
            }
        }catch (IOException e)
        {
                log("Error handling in client#" + clientnumber + ": " + e);
        }finally
        {
            try
            {
                socket.close();
            }catch (IOException e)
            {
                log("Could not close socket");
            }
            log("Connection with Client# " + clientnumber + " closed");
        }


    }
}
}

package client;

import java.io.*;
import java.net.*;



public class clientside
{   public static void main (String [] args) throws IOException
{
    Socket myclient = new Socket("localhost", 9090);
    BufferedReader in = 
            new BufferedReader(new
            InputStreamReader(myclient.getInputStream()));
    PrintWriter out = new PrintWriter(myclient.getOutputStream(), true);
    out.print("Hello server, end session\n");

    for(int i=0;i<=2;i++)
    {
        String input = in.readLine();
        System.out.println(input);
    }

    System.out.println("It is done");

    myclient.close();

}
}

包客户端；
导入java.io.*；
导入java.net。*；
公共类客户端
{公共静态void main（字符串[]args）引发IOException
{
Socket myclient=newsocket（“localhost”，9090）；
BufferedReader in=
新的BufferedReader（新的
InputStreamReader（myclient.getInputStream（））；
PrintWriter out=新的PrintWriter（myclient.getOutputStream（），true）；
out.print（“Hello服务器，结束会话\n”）；
对于（int i=0；i这只是一个bug。当您将Serverside.java中的第65行更改为：

System.out.println（输入）；

和clientside.java中的第16行：

out.println（“你好服务器，结束会话”）；

它可以工作。所以在服务器端用“System.out”代替“out”，用“println”代替“\n”在客户端。
您没有套接字将数据发送到服务器，数据应该如何传输？感谢您的快速回复，但很抱歉，我对这一点非常陌生，但您介意解释一下您的意思吗。我想Printwriter会将数据发送到服务器。我应该如何解决问题？有什么提示吗？我猜您的代码不完整，行
BufferedReader in=new BufferedReader（new
突然结束）：-）很抱歉，网站没有让我发布这么大的一行，所以我忘了按enter键并将其放在下一行，这一点现在已经解决了，但代码仍然不起作用。我注意到了这一点，并对我的愚蠢狠狠地瞪了一眼，怒气冲冲地冲出家门，但谢谢：）