滴水穿石-10GUI

GUI 图形用户界面

1 Frame 窗体

package d10;
//第一导入包
import java.awt.Frame;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;

public class Frame1 {

    public static void main(String[] args) {
        // 创建窗体并命名
        Frame f  = new Frame("HelloWorld");
        // 设置窗体大小
        //f.setSize(400, 300);
        // 设置窗体位置
        //f.setLocation(500, 300);

        //方法二 setBounds(x, y, width, height);
        f.setBounds(,, , );

        f.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                // TODO Auto-generated method stub
                System.exit();
            }
        });

        //显示窗体
        f.setVisible(true);
    }

}

version 1.0

package d10;
import java.awt.Button;
import java.awt.FlowLayout;
//第一导入包
import java.awt.Frame;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class Frame1 {

    public static void main(String[] args) {
        //01 创建窗体并命名
        Frame f  = new Frame("HelloWorld");         

        f.setBounds(,, , );
        //02-01创建 按钮 对象
        Button bu = new Button("点我");
        //02-02 按钮点击事件的监听
        bu.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                 System.out.println("再点一个试试!");
            }
        });
        //01-02 设置窗体布局方式
        f.setLayout(new FlowLayout());
        //01-03 将按钮添加到Frame中
        f.add(bu);
        //01-04 窗体关闭事件的监听
        f.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                // TODO Auto-generated method stub
                System.exit();
            }
        });

        //显示窗体
        f.setVisible(true);
    }

}

version 2.0

package d10;

import java.awt.Button;
import java.awt.FlowLayout;
import java.awt.Frame;
import java.awt.TextArea;
import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class Frame2 {
    public static void main(String[] args) {
        //01-01 创建窗体对象那个
        Frame f = new Frame();
        //01-02 设置窗体位置
        f.setBounds(, , , );
        //01-03 设置窗体布局方式
        f.setLayout(new FlowLayout());

        //02-01 创建元素
        TextField tf = new TextField();//02-01-01 创建文本框
        Button bu = new Button("数据转移");//02-01-02 创建按钮
        TextArea ta = new TextArea(,);//02-01-03 创建文本域
        //02-02 将元素添加到Frame中
        f.add(tf);
        f.add(bu);
        f.add(ta);
        //02-03 为按钮添加监听事件
        bu.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                //02-03-01 获取文本框的值
                String tf_str = tf.getText().trim();
                //02-03-02 清空文本框的值
                tf.setText("");
                //02-03-03 追加到文本域中
                ta.append(tf_str+"\r\n");
                //02-03-04 文本框获取焦点
                tf.requestFocus();

            }
        });
        //01-04 添加窗体关闭 监听事件
        f.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit();
            }
        });

        //01-05 设置窗体显示
        f.setVisible(true);
    }
}

将文本框的值转移到文本域

package d10;
import java.awt.Button;
import java.awt.Color;
import java.awt.FlowLayout;
//第一导入包
import java.awt.Frame;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class Frame3 {

    public static void main(String[] args) {
        //01 创建窗体并命名
        Frame f  = new Frame("HelloWorld");         

        f.setBounds(,, , );
        //02-01创建 按钮 对象
        Button bured = new Button("红");
        bured.setBackground(Color.red);
        Button bugreen = new Button("绿");
        bugreen.setBackground(Color.green);
        Button bublue = new Button("蓝");
        bublue.setBackground(Color.blue);

        //02-02 鼠标事件的监听
        bured.addMouseListener(new MouseAdapter() {
            @Override
            public void mouseEntered(MouseEvent e) {
                 f.setBackground(Color.red);
            }
            @Override
            public void mouseExited(MouseEvent e) {
                 f.setBackground(Color.white);
            }
        });
        bugreen.addMouseListener(new MouseAdapter() {
            @Override
            public void mouseEntered(MouseEvent e) {
                 f.setBackground(Color.green);
            }
            @Override
            public void mouseExited(MouseEvent e) {
                 f.setBackground(Color.white);
            }
        });
        bublue.addMouseListener(new MouseAdapter() {
            @Override
            public void mouseEntered(MouseEvent e) {
                 f.setBackground(Color.blue);
            }
            @Override
            public void mouseExited(MouseEvent e) {
                 f.setBackground(Color.white);
            }
        });
        //01-02 设置窗体布局方式
        f.setLayout(new FlowLayout());
        //01-03 将按钮添加到Frame中
        f.add(bured);f.add(bugreen);f.add(bublue);
        //01-04 窗体关闭事件的监听
        f.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                // TODO Auto-generated method stub
                System.exit();
            }
        });

        //显示窗体
        f.setVisible(true);
    }

}

变换背景色

package d10;

import java.awt.FlowLayout;
import java.awt.Frame;
import java.awt.Label;
import java.awt.TextField;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class Frame4 {
    public static void main(String[] args) {
        //01-01 创建窗体对象那个
        Frame f = new Frame();
        //01-02 设置窗体位置
        f.setBounds(, , , );
        //01-03 设置窗体布局方式
        f.setLayout(new FlowLayout());

        //02-01 创建元素
        Label lb = new Label("只能输入数字");
        TextField tf = new TextField();//02-01-01 创建文本框

        //02-02 将元素添加到Frame中
        f.add(lb);
        f.add(tf);

        //02-03 为文本框添加键盘监听事件
        tf.addKeyListener(new KeyAdapter() {
            //键盘释放的时候做判断
            public void keyPressed(KeyEvent e) {
                char ch = e.getKeyChar();         

                if (!(ch>=''&&ch<='')) {
                    e.consume();
                }
            }
        });

        //01-04 添加窗体关闭 监听事件
        f.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit();
            }
        });

        //01-05 设置窗体显示
        f.setVisible(true);
    }
}

只能输入数字--键盘监听事件

package d10;
import java.awt.Button;
import java.awt.FlowLayout;
//第一导入包
import java.awt.Frame;
import java.awt.Menu;
import java.awt.MenuBar;
import java.awt.MenuItem;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class Frame5 {

    public static void main(String[] args) {
        //01 创建窗体并命名
        Frame f  = new Frame("HelloWorld");
        f.setBounds(,, , );
        //02-01创建 菜单 对象
        MenuBar mb = new MenuBar();//02-01创建菜单条
        Menu mu = new Menu("文件");//02-02 创建菜单
        MenuItem mi = new MenuItem("退出系统");//02-03 创建菜单项

        //02-02放置 菜单 对象
        mu.add(mi);
        mb.add(mu);

        //02-03 菜单项点击事件的监听

        mi.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                System.exit();
            }
        });
        //01-02 设置窗体布局方式
        f.setLayout(new FlowLayout());
        //01-03 将菜单条添加到Frame中
        f.setMenuBar(mb);
        //01-04 窗体关闭事件的监听
        f.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                // TODO Auto-generated method stub
                System.exit();
            }
        });

        //显示窗体
        f.setVisible(true);
    }

}

一级菜单

package d10;

import java.awt.FlowLayout;
//第一导入包
import java.awt.Frame;
import java.awt.Menu;
import java.awt.MenuBar;
import java.awt.MenuItem;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.IOException;

public class Frame6 {

    public static void main(String[] args) {
        //01 创建窗体并命名
        Frame f  = new Frame("多级菜单");
        final String fTitle = f.getTitle();
        f.setBounds(,, , );
        //02-01创建 菜单 对象
        MenuBar mb = new MenuBar();//02-01-01创建菜单条
        Menu mu = new Menu("文件");//02-01-02 创建一级菜单

        Menu mu2 = new Menu("设置标题");//02-01-03 创建二级菜单
        MenuItem mi2_01 = new MenuItem("好好学习");//02-01-03-01 创建菜单项
        MenuItem mi2_02 = new MenuItem("天天向上");//02-01-03-02 创建菜单项
        MenuItem mi2_03 = new MenuItem("恢复标题");//02-01-03-03 创建菜单项

        MenuItem mi_02 = new MenuItem("打开记事本");//02-01-02-02 创建菜单项
        MenuItem mi_03 = new MenuItem("退出系统");//02-01-02-03 创建菜单项

        //02-02放置 菜单 对象
        mu.add(mu2);
        mu2.add(mi2_01);
        mu2.add(mi2_02);
        mu2.add(mi2_03);
        mu.add(mi_02);
        mu.add(mi_03);
        mb.add(mu);

        //02-03 菜单项点击事件的监听
        mi2_01.addActionListener(new ActionListener() {
            //好好学习
            public void actionPerformed(ActionEvent e) {
                f.setTitle(mi2_01.getLabel());
            }
        });
        mi2_02.addActionListener(new ActionListener() {
            //天天向上
            public void actionPerformed(ActionEvent e) {
                f.setTitle(mi2_02.getLabel());
            }
        });
        mi2_03.addActionListener(new ActionListener() {
            //恢复标题
            public void actionPerformed(ActionEvent e) {
                f.setTitle(fTitle);
            }
        });
        mi_02.addActionListener(new ActionListener() {
            //打开记事本
            public void actionPerformed(ActionEvent e) {
                Runtime rt =  Runtime.getRuntime();
                try {
                    rt.exec("notepad");
                } catch (IOException e1) {
                    // TODO Auto-generated catch block
                    e1.printStackTrace();
                }
            }
        });

        mi_03.addActionListener(new ActionListener() {
            //退出系统
            public void actionPerformed(ActionEvent e) {
                System.exit();
            }
        });
        //01-02 设置窗体布局方式
        f.setLayout(new FlowLayout());
        //01-03 将菜单条添加到Frame中
        f.setMenuBar(mb);
        //01-04 窗体关闭事件的监听
        f.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                // TODO Auto-generated method stub
                System.exit();
            }
        });

        //显示窗体
        f.setVisible(true);
    }

}

多级菜单

2:NetBeans 的使用

2.1 小型计算器

  public CalculateFrame() {
        initComponents();
        init();
    }

    private void init() {
        //设置标题
        this.setTitle("小型计算器");
    }

2.1.1 设置标题

  private void btnCalculateActionPerformed(java.awt.event.ActionEvent evt) {                                             

        //获取第一个操作数的值
        String sFirst = this.txtFirst.getText().trim();
        //获取第二个操作数的值
        String sSecond = this.txtSecond.getText().trim();
        //获取运算符的值
        String sOperator = this.cbOperator.getSelectedItem().toString().trim();

        //通过正则表达式 判断输入的内容是否合法
        String regex = "\\d+";
        if (!sFirst.matches(regex)) {
            //弹框提示
            JOptionPane.showMessageDialog(this, this.lblFirst.getText() + "格式不正确");
            this.txtFirst.setText("");
            this.txtFirst.requestFocus();
            return;
        }
        if (!sSecond.matches(regex)) {
            //弹框提示
            JOptionPane.showMessageDialog(this, this.lblSecond.getText() + "格式不正确");
            this.txtSecond.setText("");
            this.txtSecond.requestFocus();
            return;
        }
        int iResult = ;

        int iFirst = Integer.parseInt(sFirst);
        int iSecond = Integer.parseInt(sSecond);
        switch (sOperator) {
            case "+":
                iResult = iFirst + iSecond;
                break;
            case "-":
                iResult = iFirst - iSecond;
                break;
            case "*":
                iResult = iFirst * iSecond;
                break;
            case "/":
                iResult = iFirst / iSecond;
                break;
        }
        this.txtResult.setText(String.valueOf(iResult));
    }                                            

2.1.2 计算按钮监听事件

2.1.3 修改窗体的图标

添加两个包,用于放置图片和设置UI操作

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

package D10.Util;

import java.awt.Image;
import java.awt.Toolkit;
import javax.swing.JFrame;

/**
 *专门做界面效果的类
 * @author Administrator
 */
public class UiUtil {
    private UiUtil(){}

    public static void setFrameImage(JFrame jf){
      //01 获取工具类对象
      Toolkit tk =  Toolkit.getDefaultToolkit();

      //根据路径获取图片
     Image i = tk.getImage("src\\D10\\Resource\\jjcc.jpg");
     jf.setIconImage(i);
    }
}

2.1.3 修改图标

private void init() {
        //设置标题
        this.setTitle("小型计算器");
        //设置窗体图标
        UiUtil.setFrameImage(this);
    }

修改初始化方法

 public static void setFrameCenter(JFrame jf) {
        //01 获取工具类对象
        Toolkit tk = Toolkit.getDefaultToolkit();

        //02 获取屏幕的宽和高
        Dimension d = tk.getScreenSize();
        double srceenWidth = d.getWidth();
        double srceenHeight = d.getHeight();
        //03 获取窗体的宽和高
        int frameWidth = jf.getWidth();
        int frameHeight = jf.getHeight();
        //04 计算新的位置
        int width = (int) (srceenWidth - frameWidth) / ;
        int height = (int) (srceenHeight - frameHeight) / ;

        //05 设置窗体坐标
        jf.setLocation(width, height);
    }

2.1.4 窗体居中

 private void init() {
        //设置标题
        this.setTitle("小型计算器");
        //设置窗体图标
        UiUtil.setFrameImage(this);
        //设置窗体居中
        UiUtil.setFrameCenter(this);
    }

修改初始化方法

2.1.5 修改皮肤

2.1.5.1 引用jar包

2.1.5.2 修改main方法

    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(CalculateFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(CalculateFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(CalculateFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(CalculateFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        try {
            //</editor-fold>
            UIManager.setLookAndFeel("com.birosoft.liquid.LiquidLookAndFeel");
        } catch (ClassNotFoundException ex) {
            Logger.getLogger(CalculateFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            Logger.getLogger(CalculateFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            Logger.getLogger(CalculateFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (UnsupportedLookAndFeelException ex) {
            Logger.getLogger(CalculateFrame.class.getName()).log(Level.SEVERE, null, ex);
        }
        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new CalculateFrame().setVisible(true);
            }
        });
    }

main

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

package D10.Util;

//这里面定义了常见的要使用的皮肤的字符串路径。
public abstract class MyLookAndFeel {
    // 系统自带皮肤,5种都能用
    public static String SYS_METAL = "javax.swing.plaf.metal.MetalLookAndFeel";
    public static String SYS_NIMBUS = "com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel";
    // 有个性
    public static String SYS_CDE_MOTIF = "com.sun.java.swing.plaf.motif.MotifLookAndFeel";
    public static String SYS_WINDOWS = "com.sun.java.swing.plaf.windows.WindowsLookAndFeel";
    public static String SYS_WINDOWS_CLASSIC = "com.sun.java.swing.plaf.windows.WindowsClassicLookAndFeel";
    // JIattoo jar包资源
    public static String JTATTOO_ACRYL = "com.jtattoo.plaf.acryl.AcrylLookAndFeel";
    public static String JTATTOO_AERO = "com.jtattoo.plaf.aero.AeroLookAndFeel";
    // 还可以
    public static String JTATTOO_ALUMINUM = "com.jtattoo.plaf.aluminium.AluminiumLookAndFeel";
    // 很喜欢
    public static String JTATTOO_BERNSTEIN = "com.jtattoo.plaf.bernstein.BernsteinLookAndFeel";
    public static String JTATTOO_FAST = "com.jtattoo.plaf.fast.FastLookAndFeel";
    // 有个性
    public static String JTATTOO_HIFI = "com.jtattoo.plaf.hifi.HiFiLookAndFeel";
    public static String JTATTOO_LUNA = "com.jtattoo.plaf.luna.LunaLookAndFeel";
    // 很喜欢
    public static String JTATTOO_MCWIN = "com.jtattoo.plaf.mcwin.McWinLookAndFeel";
    public static String JTATTOO_MINT = "com.jtattoo.plaf.mint.MintLookAndFeel";
    // 有个性
    public static String JTATTOO_NOIRE = "com.jtattoo.plaf.noire.NoireLookAndFeel";
    public static String JTATTOO_SMART = "com.jtattoo.plaf.smart.SmartLookAndFeel";
    // liquidlnf.jar包资源
    // 很喜欢
    public static String LIQUIDINF = "com.birosoft.liquid.LiquidLookAndFeel";
}

MyLookAndFeel

2.2 用户登录页面

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

package D10.Dao;

import D10.Pojo.User;

public interface UserDao {
    //用户登录
    public abstract boolean login(String username ,String password);
    //用户注册
    public abstract void regist(User user);
}

UserDao

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package D10.Dao.Impl;

import D10.Dao.UserDao;
import D10.Pojo.User;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author Administrator
 */
public class UserDaoImpl implements UserDao {

    private static File file = new File("user.txt");

    static {
        try {
            file.createNewFile();
        } catch (IOException ex) {
            ex.printStackTrace();
        }

    }

    public boolean login(String username, String password) {
        boolean flag = false;
        BufferedReader  br = null;
        try{
            //一次读取一行数据
            br = new BufferedReader(new FileReader(file));
            String  line = null;
            while((line = br.readLine())!=null){
                String [] datas = line.split("=");
                if (datas[].equals(username)&&datas[].equals(password)) {
                    flag = true;
                    break;
                }
            }
        }
        catch( IOException e){
            try {
                br.close();
            } catch (IOException ex) {
                Logger.getLogger(UserDaoImpl.class.getName()).log(Level.SEVERE, null, ex);
            }
        }
        return  flag;
    }

    public void regist(User user) {
        BufferedWriter bw = null;
        try{
           bw = new BufferedWriter(new FileWriter(file,true));
           bw.write(user.getUserName()+"="+user.getPassword());
           bw.newLine();
           bw.flush();
        }
        catch(IOException e){
            e.printStackTrace();
        }finally{
            try {
                bw.close();
            } catch (IOException ex) {
                Logger.getLogger(UserDaoImpl.class.getName()).log(Level.SEVERE, null, ex);
            }
        }
    }

}

UserDaoImpl

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package D10.Pojo;

/**
 *
 * @author Administrator
 */
public class User {

    private String userName;
    private String password;

    public String getUserName() {
        return userName;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }
}

User

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package D10.Util;

import java.awt.Dimension;
import java.awt.Image;
import java.awt.Toolkit;
import javax.swing.JFrame;

/**
 * 专门做界面效果的类
 *
 * @author Administrator
 */
public class UiUtil {

    private UiUtil() {
    }

    //修改窗体图标
    public static void setFrameImage(JFrame jf) {
        //01 获取工具类对象
        Toolkit tk = Toolkit.getDefaultToolkit();

        //根据路径获取图片
        Image i = tk.getImage("src\\D10\\Resource\\user.jpg");
        jf.setIconImage(i);
    }

    //窗体居中
    public static void setFrameCenter(JFrame jf) {
        //01 获取工具类对象
        Toolkit tk = Toolkit.getDefaultToolkit();

        //02 获取屏幕的宽和高
        Dimension d = tk.getScreenSize();
        double srceenWidth = d.getWidth();
        double srceenHeight = d.getHeight();
        //03 获取窗体的宽和高
        int frameWidth = jf.getWidth();
        int frameHeight = jf.getHeight();
        //04 计算新的位置
        int width = (int) (srceenWidth - frameWidth) / ;
        int height = (int) (srceenHeight - frameHeight) / ;

        //05 设置窗体坐标
        jf.setLocation(width, height);
    }
}

UiUtil

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package D10.view;

import D10.Dao.Impl.UserDaoImpl;
import D10.Dao.UserDao;
import D10.Pojo.User;
import D10.Util.UiUtil;
import javax.swing.JOptionPane;

/**
 *
 * @author Administrator
 */
public class LoginFrame extends javax.swing.JFrame {

    /**
     * Creates new form LoginFrame
     */
    public LoginFrame() {
        initComponents();
        init();
    }

    private void init() {
        this.setTitle("登录界面");
        this.setResizable(false);
        UiUtil.setFrameCenter(this);
        UiUtil.setFrameImage(this);
    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {

        lblUserName = new javax.swing.JLabel();
        btnLogin = new javax.swing.JButton();
        txtUserName = new javax.swing.JTextField();
        txtPassword = new javax.swing.JTextField();
        lblPassword = new javax.swing.JLabel();
        btnRegister = new javax.swing.JButton();
        btnReset = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        lblUserName.setText("用户名:");

        btnLogin.setText("登录");
        btnLogin.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnLoginActionPerformed(evt);
            }
        });

        lblPassword.setText("密码:");

        btnRegister.setText("注册");
        btnRegister.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnRegisterActionPerformed(evt);
            }
        });

        btnReset.setText("重置");
        btnReset.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnResetActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(, , )
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                        .addComponent(lblUserName)
                        .addComponent(lblPassword))
                    .addGroup(layout.createSequentialGroup()
                        .addComponent(btnLogin)
                        .addGap(, , )))
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addGap(, , )
                        .addComponent(btnReset)
                        .addGap(, , )
                        .addComponent(btnRegister)
                        .addContainerGap(, Short.MAX_VALUE))
                    .addGroup(layout.createSequentialGroup()
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                            .addComponent(txtPassword, javax.swing.GroupLayout.DEFAULT_SIZE, , Short.MAX_VALUE)
                            .addComponent(txtUserName))
                        .addGap(, , Short.MAX_VALUE))))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(, , )
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(lblUserName)
                    .addComponent(txtUserName, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(, , )
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(lblPassword)
                    .addComponent(txtPassword, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(, , )
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(btnLogin)
                    .addComponent(btnRegister)
                    .addComponent(btnReset))
                .addContainerGap(, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>                        

    private void btnRegisterActionPerformed(java.awt.event.ActionEvent evt) {
        // "登录界面"的"注册"按钮
        RegisterFrame rf = new RegisterFrame();
        //this.setVisible(false);
        this.dispose();
        rf.setVisible(true);
    }                                           

    private void btnResetActionPerformed(java.awt.event.ActionEvent evt) {
        // "登录界面"的"重置"按钮
        this.txtPassword.setText("");
        this.txtUserName.setText("");
    }                                        

    private void btnLoginActionPerformed(java.awt.event.ActionEvent evt) {
        // "登录界面"的"登录"按钮
        String userName = this.txtUserName.getText().trim();
        String password = this.txtPassword.getText().trim();

        String userNameRegex = "[a-zA-Z]{5}";
        String passwordRegex = "\\w{5,12}";

        if (!userName.matches(userNameRegex) || !password.matches(passwordRegex)) {
            String msg = "";
            if (!userName.matches(userNameRegex)) {
                msg += "用户名格式不正确!(5位英文字符)";
            }
            if (!password.matches(userNameRegex)) {
                msg += "密码格式不正确!(6-12位字符)";
            }
            JOptionPane.showMessageDialog(this, msg);
            this.txtPassword.setText("");
            this.txtUserName.setText("");
            this.txtUserName.requestFocus();
            return;
        }

        //调用用户操作的功能进行注册
        UserDao ud = new UserDaoImpl();
        boolean flae = ud.login(userName, password);
        if (flae) {
            //给出提示
            JOptionPane.showMessageDialog(this, "登录成功!");
        } else {
            //给出提示
            JOptionPane.showMessageDialog(this, "用戶名或密碼有誤!");
            this.txtPassword.setText("");
            this.txtUserName.setText("");
            this.txtUserName.requestFocus();
        }

    }                                        

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(LoginFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(LoginFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(LoginFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(LoginFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new LoginFrame().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify
    private javax.swing.JButton btnLogin;
    private javax.swing.JButton btnRegister;
    private javax.swing.JButton btnReset;
    private javax.swing.JLabel lblPassword;
    private javax.swing.JLabel lblUserName;
    private javax.swing.JTextField txtPassword;
    private javax.swing.JTextField txtUserName;
    // End of variables declaration                   

}

LoginFrame

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package D10.view;

import D10.Dao.Impl.UserDaoImpl;
import D10.Dao.UserDao;
import D10.Pojo.User;
import D10.Util.UiUtil;
import javax.swing.JOptionPane;

/**
 *
 * @author Administrator
 */
public class RegisterFrame extends javax.swing.JFrame {

    /**
     * Creates new form LoginFrame
     */
    public RegisterFrame() {
        initComponents();
        init();
    }

    private void init() {
        this.setTitle("登录界面");
        this.setResizable(false);
        UiUtil.setFrameCenter(this);
        UiUtil.setFrameImage(this);
    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {

        lblUserName = new javax.swing.JLabel();
        btnCancel = new javax.swing.JButton();
        txtUserName = new javax.swing.JTextField();
        txtPassword = new javax.swing.JTextField();
        lblPassword = new javax.swing.JLabel();
        btnRegister = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        lblUserName.setText("用户名:");

        btnCancel.setText("取消");
        btnCancel.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnCancelActionPerformed(evt);
            }
        });

        lblPassword.setText("密码:");

        btnRegister.setText("注册");
        btnRegister.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnRegisterActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addGap(, , )
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(lblUserName)
                            .addComponent(lblPassword)))
                    .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                        .addContainerGap()
                        .addComponent(btnRegister)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)))
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                            .addComponent(txtPassword, javax.swing.GroupLayout.DEFAULT_SIZE, , Short.MAX_VALUE)
                            .addComponent(txtUserName))
                        .addGap(, , Short.MAX_VALUE))
                    .addGroup(layout.createSequentialGroup()
                        .addGap(, , )
                        .addComponent(btnCancel)
                        .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(, , )
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(lblUserName)
                    .addComponent(txtUserName, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(, , )
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(lblPassword)
                    .addComponent(txtPassword, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(, , )
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(btnRegister)
                    .addComponent(btnCancel))
                .addContainerGap(, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>                        

    private void btnCancelActionPerformed(java.awt.event.ActionEvent evt) {
        goLogin();
    }                                         

    private void btnRegisterActionPerformed(java.awt.event.ActionEvent evt) {
        // "注册界面"的"注册"按钮:
        String userName = this.txtUserName.getText().trim();
        String password = this.txtPassword.getText().trim();

        String userNameRegex = "[a-zA-Z]{5}";
        String passwordRegex = "\\w{5,12}";

        if (!userName.matches(userNameRegex) || !password.matches(passwordRegex)) {
            String msg = "";
            if (!userName.matches(userNameRegex)) {
                msg += "用户名格式不正确!(5位英文字符)";
            }
            if (!password.matches(userNameRegex)) {
                msg += "密码格式不正确!(6-12位字符)";
            }
            JOptionPane.showMessageDialog(this, msg);
            this.txtPassword.setText("");
            this.txtUserName.setText("");
            this.txtUserName.requestFocus();
            return;
        }
        //封装对象
        User user = new User();
        user.setUserName(userName);
        user.setPassword(password);
        //调用用户操作的功能进行注册
        UserDao ud = new UserDaoImpl();
        ud.regist(user);
        //给出提示
        JOptionPane.showMessageDialog(this, "注册成功!");
        goLogin();
    }                                           

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(RegisterFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(RegisterFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(RegisterFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(RegisterFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new RegisterFrame().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify
    private javax.swing.JButton btnCancel;
    private javax.swing.JButton btnRegister;
    private javax.swing.JLabel lblPassword;
    private javax.swing.JLabel lblUserName;
    private javax.swing.JTextField txtPassword;
    private javax.swing.JTextField txtUserName;
    // End of variables declaration                   

    private void goLogin() {
        this.dispose();
        LoginFrame lf = new LoginFrame();
        lf.setVisible(true);
    }

}

RegisterFrame