可能重复：
Client / Server for a Timered Login - My codes are creazy
请看一下这个CLient Server程序并帮助我让它们工作。只有在服务器检查客户端发送的登录信息并在登录检查后发回“OK”之后，程序才应启动计时器。请帮助我，这些代码做了一些疯狂的事情，例如：当我点击客户端按钮“CONNETTI”（CONNECT）时，第二个客户端启动...我不知道为什么都不怎么样！请帮帮我，谢谢!!!
---客户项目---
enter code here
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.Date;
public class Cronometro{
private JFrame frame;
private JLabel labelTime;
private JPanel panelButtons;
private JButton buttonLogin;
private JButton buttonLogout;
JTextField username = new JTextField(15);
JTextField password = new JTextField(15);
JTextField telefono = new JTextField(6);
JLabel status = new JLabel("Server Disconnesso");
JLabel empty = new JLabel();
JLabel title = new JLabel ("LudecaLog-In");
JLabel nameLabel = new JLabel ("Nome Utente: ");
JLabel passLabel = new JLabel ("Password: ");
JLabel telLabel = new JLabel ("Telefono: ");
private Timer timer;
private long startTime;
String rigaTesto;
// DataInputStream in;
BufferedReader in ;
DataOutputStream out;
Socket clientSocket;
public Cronometro ()
{
frame = new JFrame ("Cronometro");
frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
frame.setSize (500, 500);
labelTime = new JLabel ("0:00:00.0");
labelTime.setFont (new Font ("SansSerif", Font.BOLD, 30));
labelTime.setHorizontalAlignment (JLabel.CENTER);
buttonLogin = new JButton ("START");
buttonLogout = new JButton ("STOP");
buttonLogout.setEnabled (false);
title.setForeground(Color.blue);
title.setHorizontalAlignment(JLabel.CENTER);
Font titleFont = new Font("Title", Font.CENTER_BASELINE, 50);
title.setFont(titleFont);
GridBagConstraints constr = new GridBagConstraints();
panelButtons = new JPanel (new GridBagLayout());
constr.gridx=0;
constr.gridy=2;
panelButtons.add(nameLabel,constr);
constr.gridx=1;
constr.gridy=2;
panelButtons.add(username,constr);
constr.gridx=0;
constr.gridy=4;
panelButtons.add(passLabel,constr);
constr.gridx=1;
constr.gridy=4;
panelButtons.add(password,constr);
constr.gridx=0;
constr.gridy=5;
panelButtons.add(telLabel,constr);
constr.gridx=1;
constr.gridy=5;
telefono.setHorizontalAlignment(JLabel.LEFT);
panelButtons.add(telefono,constr);
constr.gridx=1;
constr.gridy=8;
panelButtons.add(empty,constr);
constr.gridx=1;
constr.gridy=9;
panelButtons.add(status,constr);
constr.gridx=0;
constr.gridy=10;
panelButtons.add (buttonLogin,constr);
constr.gridx=2;
constr.gridy=10;
panelButtons.add (buttonLogout,constr);
frame.setVisible(true);
frame.add(title,BorderLayout.NORTH);
frame.add (labelTime, BorderLayout.CENTER);
frame.add (panelButtons, BorderLayout.SOUTH);
timer = new Timer (50, new ActionListener () {
public void actionPerformed (ActionEvent e) {
long diffTime = System.currentTimeMillis () - startTime;
int decSeconds = (int) (diffTime % 1000 / 100);
int seconds = (int) (diffTime / 1000 % 60);
int minutes = (int) (diffTime / 60000 % 60);
int hours = (int) (diffTime / 3600000);
String s = String.format ("%d:%02d:%02d.%d", hours, minutes,
seconds, decSeconds);
labelTime.setText(s);
}
});
buttonLogin.addActionListener (new ActionListener ()
{
public void actionPerformed (ActionEvent e)
{
/***************** 1 CONNESSIONE AL SERVER *******/
try {
clientSocket = new Socket("192.168.42.176",9910);
System.out.println("Connessione al Server in atto...");
String loginOperatore = new String() ;
loginOperatore=(username.getText()+password.getText()+telefono.getText());
//apertura stream di input
InputStreamReader isr=new InputStreamReader(clientSocket.getInputStream());
BufferedReader in=new BufferedReader(isr);
//apertura stream di output
OutputStreamWriter osw=new OutputStreamWriter(clientSocket.getOutputStream());
BufferedWriter bw=new BufferedWriter(osw);
PrintWriter out=new PrintWriter(bw,true);
//invio della stringa al server
out.println(loginOperatore.toString());
status.setText("Connesso al Server, controllo la Login");
String confermaLogin = new String();
System.out.println(confermaLogin=in.readLine());
System.out.println("ciao----->"+(confermaLogin));
if(confermaLogin.equals("OK"))
{
//if (clientSocket != null && out != null && in != null) {
Tempo tempo = new Tempo();
final Date data = tempo.dataCompleta;
startTime = System.currentTimeMillis();
timer.start();
buttonLogin.setEnabled(false);
buttonLogout.setEnabled(true);
status.setText("<html>Log In Effettuato con Successo! <br>Data e Ora:<br>"+ data+"</html>");
// }
}
else if (confermaLogin.equals("DATI_ERRATI"))
{
status.setText("ERRORE!!! Dati di Log-In Errata!!");
}
//chiusura della socket e degli stream
clientSocket.close();
in.close();
bw.close();
out.close();
}
catch (UnknownHostException err)
{
System.err.println("Errore: probelmi di comunicazione");
}
catch (IOException err1)
{
System.err.println("Errore: probelmi di comunicazione");
}
/******************************** 1 FINE CONNESSIONE AL SERVER *******/
}
});
buttonLogout.addActionListener (new ActionListener () {
public void actionPerformed (ActionEvent e)
{
timer.stop ();
buttonLogin.setEnabled (true);
buttonLogout.setEnabled (false);
Tempo tempo = new Tempo();
final Date data = tempo.dataCompleta;
status.setText("<html>Log Out Effettuato con Successo! <br>Data e Ora:<br>"+ data+"</html>");
}
});
frame.setVisible (true);
}
public static void main (String[] args)
{
SwingUtilities.invokeLater (new Runnable()
{
public void run()
{
new Cronometro();
}
});
}
}
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
public class Tempo{
public int ore,minuti,secondi,giorno,mese,anno;
public long dataMillis;
public Date dataCompleta = new Date();
//costruttore di default
public Tempo(){
GregorianCalendar c =new GregorianCalendar();
dataCompleta=c.getTime();
dataMillis=c.getTimeInMillis()/* / (24*60*60*1000)*/;
ore=c.get(Calendar.HOUR_OF_DAY);
minuti=c.get(Calendar.MINUTE);
secondi=c.get(Calendar.SECOND);
giorno=c.get(Calendar.DAY_OF_MONTH);
mese=c.get(Calendar.MONTH);
anno=c.get(Calendar.YEAR);
}//Tempo
}//tempo
---服务器项目----
enter code here
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.Date;
public class provaServer{
private JFrame frame;
private JPanel panelButtons;
private JPanel panelSchermiTitolo;
private JButton buttonConnetti;
private JButton buttonDisconnetti;
private JButton buttonSalvaFile;
private JButton buttonAggiornaSchermi;
private JButton buttonCreaLogin;
private TextArea schermoOperatori;
private TextArea schermoNotifiche;
JTextField username = new JTextField(15);
JTextField password = new JTextField(15);
JTextField telefono = new JTextField(6);
JLabel status = new JLabel("Server Disconnesso");
JLabel empty = new JLabel();
JLabel title = new JLabel ("LudecaLog-In Server");
String rigaTesto;
// DataInputStream in;
BufferedReader in ;
DataOutputStream out;
public provaServer ()
{
try {
Socket clientSocket=null;
ServerSocket serverSocket=null;
serverSocket = new ServerSocket(9910);
clientSocket = serverSocket.accept();
System.out.println("Server: Sono attivo sulla Rete ");
//serverSocket.setReuseAddress(true);
status.setText("Il Server è adesso Attivo sulla Rete");
BufferedReader in= new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
//Stream di output
DataOutputStream out=new DataOutputStream(clientSocket.getOutputStream());
String loginOperatore = new String();
loginOperatore=in.readLine();
System.out.println("cronServer:---->"+loginOperatore);
Operatore operatore = new Operatore();
if(operatore.controllaLogin(loginOperatore)==true)
{
out.writeBytes("OK");
}
else
{
out.writeBytes("DATI_ERRATI");
}
System.out.println("Server: Sono attivo sulla Rete ");
serverSocket.setReuseAddress(true);
status.setText("Il Server è adesso Attivo sulla Rete");
}
catch (IOException e1) {
System.out.println(e1);
System.out.println("Server: Non riesco ad aprire il socket");
}
frame = new JFrame ("CronometroServer");
frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
frame.setSize (500, 500);
//TEXT AREA
//labelTime = new JLabel ("0:00:00.0");
//labelTime.setFont (new Font ("SansSerif", Font.BOLD, 30));
//labelTime.setHorizontalAlignment (JLabel.CENTER);
buttonSalvaFile = new JButton ("SALVA FILE");
buttonCreaLogin = new JButton ("CREA LOGIN");
buttonAggiornaSchermi = new JButton ("AGGIORNA");
buttonConnetti = new JButton ("CONNETTI");
buttonDisconnetti = new JButton ("DISCONNETTI");
//buttonSalvaFile.setEnabled (false);
//buttonCreaLogin.setEnabled (false);
//buttonAggiornaSchermi.setEnabled (false);
//buttonDisconnetti.setEnabled (false);
schermoOperatori = new TextArea();
schermoNotifiche = new TextArea();
schermoOperatori.setEnabled(false);
schermoNotifiche.setEnabled(false);
title.setForeground(Color.blue);
title.setHorizontalAlignment(JLabel.CENTER);
Font titleFont = new Font("Title", Font.CENTER_BASELINE, 45);
title.setFont(titleFont);
GridBagConstraints constr = new GridBagConstraints();
panelButtons = new JPanel (new GridBagLayout());
panelSchermiTitolo = new JPanel (new GridBagLayout());
constr.gridx=0;
constr.gridy=1;
panelSchermiTitolo.add(title,constr);
constr.gridx=0;
constr.gridy=2;
panelSchermiTitolo.add(schermoOperatori,constr);
constr.gridx=0;
constr.gridy=3;
panelSchermiTitolo.add(schermoNotifiche,constr);
constr.gridx=0;
constr.gridy=4;
panelSchermiTitolo.add(status,constr);
constr.gridx=2;
constr.gridy=0;
panelButtons.add (buttonDisconnetti,constr);
constr.gridx=3;
constr.gridy=0;
panelButtons.add (buttonAggiornaSchermi,constr);
constr.gridx=4;
constr.gridy=0;
panelButtons.add (buttonSalvaFile,constr);
constr.gridx=5;
constr.gridy=0;
panelButtons.add (buttonCreaLogin,constr);
frame.add(title,BorderLayout.NORTH);
frame.add (panelButtons, BorderLayout.SOUTH);
frame.add (panelSchermiTitolo, BorderLayout.CENTER);
frame.setVisible(true);
buttonConnetti.addActionListener (new ActionListener()
{
public void actionPerformed (ActionEvent e)
{
}
});
buttonDisconnetti.addActionListener (new ActionListener () {
public void actionPerformed (ActionEvent e)
{
try {
clientSocket.close();
in.close();
out.close();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
});
frame.setVisible(true);
}
public static void main (String[] args)
{
SwingUtilities.invokeLater (new Runnable()
{
public void run()
{
new provaServer();
}
});
}
}
public class Operatore {
private String identificatoreLogin = new String ();
public Operatore()
{
identificatoreLogin="rafgrav1106";
}
public boolean controllaLogin(String loginInserita)
{
System.out.println("oper: "+identificatoreLogin);
System.out.println("oper:" +loginInserita);
if(loginInserita.equals(identificatoreLogin))
{
return true;
}
else
{
return false;
}
}
public String getIdentificatoreLogin() {
return identificatoreLogin;
}
public void setIdentificatoreLogin(String identificatoreLogin)
{
this.identificatoreLogin=identificatoreLogin;
}
}
答案 0 :(得分：1)
常见的错误是混合文本和二进制流，例如写一个，但读另一个。
在您的情况下，您将二进制写入（服务器端）与文本读取（客户端）混合，这肯定会令人困惑。你也可以在你的客户端上正确地写文本但是缓冲它不太可能有用，因为你必须每次都要冲洗它以确保它被发送。
我建议你使用BufferedReader和PrintWriter，尽量少用。 BTW PrintWriter不会抛出不理想的IOException，你必须checkError()来查看它是否失败。 ：|