java在线聊天项目1.2版 ——开启多个客户端，分别实现数据库注册和登录功能后，成功登陆则登录框消失，好友列表窗出现

package com.swift.frame;

import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.ConnectException;
import java.net.Socket;

import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.border.TitledBorder;

import com.swift.util.Center;

public class LoginDialog extends JDialog {

private static final long serialVersionUID = 1L;
private JPasswordField passwordField_2;
private JPasswordField passwordField_1;
private JTextField textField_2;
private JTextField textField;
String request = null;
String response = null;

Socket s;
DataOutputStream dos;
DataInputStream dis;

public static void main(String args[]) {
JFrame.setDefaultLookAndFeelDecorated(true);
JDialog.setDefaultLookAndFeelDecorated(true);

try {
UIManager.setLookAndFeel("javax.swing.plaf.nimbus.NimbusLookAndFeel");
} catch (ClassNotFoundException e1) {
e1.printStackTrace();
} catch (InstantiationException e1) {
e1.printStackTrace();
} catch (IllegalAccessException e1) {
e1.printStackTrace();
} catch (UnsupportedLookAndFeelException e1) {
e1.printStackTrace();
}

EventQueue.invokeLater(new Runnable() {
public void run() {
try {
LoginDialog dialog = new LoginDialog();
dialog.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
dialog.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}

public LoginDialog() {
super();
setResizable(false);
setTitle("在线聊天登录框");
getContentPane().setLayout(null);
setBounds(100, 100, 427, 301);// 注册时高度为578，不注册是301

// 设置窗口居中
this.setLocation(Center.getPoint(this.getSize()));

final JTextField textField_1 = new JTextField();
textField_1.setBounds(148, 90, 192, 42);
getContentPane().add(textField_1);

final JLabel label = new JLabel();
label.setText("帐    号");
label.setBounds(76, 102, 66, 18);
getContentPane().add(label);

final JLabel label_1 = new JLabel();
label_1.setText("密    码");
label_1.setBounds(76, 167, 66, 18);
getContentPane().add(label_1);

final JPasswordField passwordField = new JPasswordField();
passwordField.setBounds(148, 155, 192, 42);
getContentPane().add(passwordField);

final JButton button_1 = new JButton();
button_1.addActionListener(new ActionListener() {
public void actionPerformed(final ActionEvent e) {

String phone = new String(textField_1.getText()).trim();
String password = new String(passwordField.getPassword()).trim();
if (!phone.equals("") && !password.equals("")) {
try {
request = "login";
dos.writeUTF(request);
response = dis.readUTF();
if (response.equals("login")) {
dos.writeUTF(phone);
dos.writeUTF(password);
String flag=dis.readUTF();
if(flag.equals("success")) {
javax.swing.JOptionPane.showMessageDialog(LoginDialog.this, "登录成功");
//登陆窗消失
LoginDialog.this.dispose();
//好友列表窗出现
new FriendsFrame(phone,s);

}else if(flag.equals("fail")) {
javax.swing.JOptionPane.showMessageDialog(LoginDialog.this, "登录失败");
}
}
} catch (IOException e1) {
e1.printStackTrace();
}
} else {
javax.swing.JOptionPane.showMessageDialog(LoginDialog.this, "用户名密码必须填写...");
return;
}
}
});
button_1.setText("登录");
button_1.setBounds(230, 222, 106, 36);
getContentPane().add(button_1);

final JButton button = new JButton();
button.addActionListener(new ActionListener() {
public void actionPerformed(final ActionEvent e) {
if (LoginDialog.this.getHeight() == 301) {
LoginDialog.this.setSize(427, 578);
} else {
LoginDialog.this.setSize(427, 301);
}
// 设置窗口不断居中
LoginDialog.this.setLocation(Center.getPoint(LoginDialog.this.getSize()));
}
});
button.setText("注册");
button.setBounds(76, 222, 106, 36);
getContentPane().add(button);

final JPanel panel = new JPanel();
panel.setLayout(null);
panel.setBorder(new TitledBorder(null, "注册用户", TitledBorder.DEFAULT_JUSTIFICATION,
TitledBorder.DEFAULT_POSITION, null, null));
panel.setBounds(10, 278, 401, 226);
getContentPane().add(panel);

final JLabel label_2 = new JLabel();
label_2.setBounds(44, 41, 65, 18);
label_2.setText("手机号：");
panel.add(label_2);

textField = new JTextField();
textField.setBounds(115, 35, 225, 30);
panel.add(textField);

final JButton button_2 = new JButton();
button_2.setText("发送验证");
button_2.setBounds(243, 75, 97, 30);
panel.add(button_2);

textField_2 = new JTextField();
textField_2.setBounds(115, 104, 95, 30);
panel.add(textField_2);

final JLabel label_3 = new JLabel();
label_3.setText("验证码：");
label_3.setBounds(44, 110, 65, 18);
panel.add(label_3);

passwordField_1 = new JPasswordField();
passwordField_1.setBounds(115, 143, 231, 30);
panel.add(passwordField_1);

passwordField_2 = new JPasswordField();
passwordField_2.setBounds(115, 175, 231, 30);
panel.add(passwordField_2);

final JLabel label_4 = new JLabel();
label_4.setText("密        码：");
label_4.setBounds(44, 149, 65, 18);
panel.add(label_4);

final JLabel label_5 = new JLabel();
label_5.setText("验证密码：");
label_5.setBounds(44, 181, 65, 18);
panel.add(label_5);

final JButton button_3 = new JButton();
button_3.setBounds(47, 510, 97, 30);
getContentPane().add(button_3);
button_3.setText("放弃");

final JButton button_4 = new JButton();
button_4.addActionListener(new ActionListener() {
public void actionPerformed(final ActionEvent e) {

String phone = textField.getText();
String password = null;
String str1 = new String(passwordField_1.getPassword()).trim();
String str2 = new String(passwordField_2.getPassword()).trim();
if (!phone.equals("") && !str1.equals("") && !str2.equals("")) {
if (str1.equals(str2)) {
password = new String(passwordField_2.getPassword()).trim();
try {
request = "reg";
dos.writeUTF(request);
String response = dis.readUTF();
if (response.equals("reg")) {
dos.writeUTF(phone);
dos.writeUTF(password);
}
javax.swing.JOptionPane.showMessageDialog(LoginDialog.this, "注册成功...");
} catch (IOException e1) {
e1.printStackTrace();
}
} else {
javax.swing.JOptionPane.showMessageDialog(LoginDialog.this, "输入密码不一致...");
System.out.println("输入密码不一致...");
passwordField_1.setText("");
passwordField_2.setText("");
}

} else {
javax.swing.JOptionPane.showMessageDialog(LoginDialog.this, "用户名密码必须填写...");
return;
}
}
});

button_4.setBounds(262, 510, 97, 30);
getContentPane().add(button_4);
button_4.setText("注册用户");

connect();
this.addWindowListener(new WindowAdapter() {
@Override
public void windowClosed(WindowEvent e) {
disconnect();
}
});
}

public void connect() {
try {
s = new Socket("127.0.0.1", 8888);//以本机做server
System.out.println("一个客户端登陆中....!");
dos = new DataOutputStream(s.getOutputStream());
dis = new DataInputStream(s.getInputStream());

} catch (ConnectException e) {
System.out.println("服务端异常.........");
System.out.println("请确认服务端是否开启.........");
} catch (IOException e) {
e.printStackTrace();
}
}

public void disconnect() {
try {
if (dos != null)
dos.close();
if (s != null)
s.close();
} catch (IOException e) {
e.printStackTrace();
}
}

}