在java中通过套接字发送字符串的问题

Question

嗨，大家好，我在通过java中的套接字发送2个字符串时遇到问题。 我有从客户端获取用户名和密码并将其发送到服务器的用户界面。我的问题使2部分：1 - 我无法获得我的服务器中的字符串用户名2-当客户端发送用户名时，套接字在发送密码之前关闭这里是我的代码请帮助我。 主要目的是从UI（客户端）获取2个字符串的用户名和密码，并通过套接字将它们发送到服务器。

服务器：

package finalproject; 
import java.io.EOFException; 
import java.io.IOException; 
import java.io.InputStream; 
import java.io.InputStreamReader; 
import java.io.OutputStream; 
import java.io.OutputStreamWriter; 
import java.net.ServerSocket; 
import java.net.Socket; 

public class Server 
{ 
ServerSocket listener; 
Socket socket; 
OutputStream out ; 
InputStream in;; 
InputStreamReader reader; 
OutputStreamWriter writer; 
String massage; 

public void connectserver() throws IOException 
{ 
    listener = new ServerSocket(9097); 
    System.out.println("Server is running on port 9097 ..."); 
} 
public void waitforclient() throws IOException 
{ 
    socket = listener.accept(); 
System.out.println("A new client connected to the server"); 
} 
public void startstreamsserver() throws IOException 
{ 
    in = socket.getInputStream(); 
    out = socket.getOutputStream(); 
writer = new OutputStreamWriter(out); 
    reader = new InputStreamReader(in); 
    System.out.println("Server streams are ready"); 
} 
public void closestreamsserver() throws IOException 
{ 
    writer.close(); 
    reader.close(); 
} 
public void getinfoserver() throws IOException 
{ 
    try 
    { 
     reader.read(); 
     System.out.println(reader); 
     System.out.println("input is : " + reader.toString());  
    } 
    catch(IOException IOE) 
    { 
      IOE.printStackTrace();//if there is an error, print it out 
    }  
} 
} 

客户：

package finalproject; 

import java.awt.BorderLayout; 
import java.awt.FlowLayout; 
import java.awt.event.ActionEvent; 
import java.io.EOFException; 
import java.io.IOException; 
import java.io.InputStream; 
import java.io.InputStreamReader; 
import java.io.OutputStream; 
import java.io.OutputStreamWriter; 
import java.net.ServerSocket; 
import java.net.Socket; 
import java.net.UnknownHostException; 
import java.util.logging.Level; 
import java.util.logging.Logger; 
import javax.swing.BoxLayout; 
import javax.swing.JButton; 
import javax.swing.JFrame; 
import javax.swing.JLabel; 
import javax.swing.JPanel; 
import javax.swing.JTextField; 

public class Client 
{ 
Socket socket; 
OutputStream out1; 
InputStream in1; 
OutputStreamWriter writer; 
InputStreamReader reader; 
String massage; 
JFrame frame; 
BorderLayout blayout; 
JButton center; 
JButton south; 
FlowLayout fLoyout; 
JLabel jb1; 
JTextField name; 
JLabel jb2; 
JTextField pass; 
JLabel jb7; 
JPanel cpanel; 
JPanel spanel; 

public void connectclient() throws IOException 
{ 
    socket = new Socket("localhost", 9097); 
    System.out.println("connect to server on port 9097"); 
} 
public void startstreamsclient() throws IOException 
{ 
    in1 = socket.getInputStream(); 
    out1 = socket.getOutputStream(); 
writer = new OutputStreamWriter(out1); 
    reader = new InputStreamReader(in1); 
    System.out.println("Client streams are ready"); 
}  
public void closestreamsclient() throws IOException 
{ 
    writer.close(); 
    reader.close(); 
} 
public void loginformclient() 
{ 
    frame = new JFrame(); 
    frame.setVisible(true); 
    frame.setSize(500, 600); 
    blayout = new BorderLayout(); 
    center = new JButton(); 
    south = new JButton(); 
    frame.setLayout(blayout); 
    fLoyout = new FlowLayout(FlowLayout.CENTER); 
    center.setLayout(fLoyout); 
    south.setLayout(fLoyout); 
    jb1 = new JLabel("Username :"); 
    name = new JTextField(20); 
    center.add(jb1); 
    center.add(name); 
    jb2 = new JLabel("Password :"); 
    pass = new JTextField(30); 
    center.add(jb2); 
    center.add(pass); 

    jb7 = new JLabel("Save"); 
    south.add(jb7); 

    cpanel = new JPanel(); 
    cpanel.add(center); 
    spanel = new JPanel(); 
    south.addActionListener((ActionEvent ae) -> { 
     try 
     { 
      writer.write(name.getText()); 
      writer.flush(); 
      writer.write(pass.getText()); 
      writer.flush(); 
      writer.close(); 
     } 
     catch (IOException ex) 
     { 
      Logger.getLogger(Client.class.getName()).log(Level.SEVERE, null, ex); 
     } 
    }); 
    spanel.add(south); 
    cpanel.setLayout(new BoxLayout(cpanel, BoxLayout.Y_AXIS)); 
    frame.add(cpanel, BorderLayout.CENTER); 
    frame.add(spanel, BorderLayout.SOUTH); 

    frame.pack(); 
    frame.setVisible(true); 
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
} 

} 

和我的主类：

package finalproject; 

import java.io.IOException; 
import javax.swing.JFrame; 

public class Finalproject 
{ 
public static void main(String[] args) throws IOException 
{ 
    //build Server & Client 
    Server server = new Server(); 
    Client client = new Client(); 

    //Start Server & Client 
    server.connectserver(); 
    client.connectclient(); 

    //Server wait for new connection 
    server.waitforclient(); 

    //start the Streams 
    client.startstreamsclient(); 
    server.startstreamsserver(); 

    //Client send login information to Server 
    client.loginformclient(); 

    //Server get information 
    server.getinfoserver(); 

} 

} 

但我在我的服务器输入是：

java.io.InputStreamReader@171fc7e 
    input is : java.io.InputStreamReader@171fc7e 

Answer 1

编辑基于EJP正确备注：

添加新的行分隔符：

writer.write(name.getText() + System.lineSeparator()); 
writer.write(pass.getText()); 
writer.flush(); 

替换此：

reader = new InputStreamReader(in); 
System.out.println("Server streams are ready"); 

有：

BufferedReader in = new BufferedReader(reader); 
String username= in.readLine(); 
String password = in.readLine();