25 API-GUI(事件监听机制,适配器模式),Netbeans的概述和使用(模拟登陆注册GUI版)
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1:GUI(了解)
(1)用户图形界面GUI:方便直观
CLI:需要记忆一下命令，麻烦
(2)两个包：
java.awt:和系统关联较强 ,属重量级控件
javax.swing:纯Java编写,增强了移植性，属轻量级控件。
(3)GUI的继承体系
组件：组件就是对象
容器组件：是可以存储基本组件和容器组件的组件。
基本组件：是可以使用的组件，但是必须依赖容器。
(4)事件监听机制(理解)
A:事件源B:事件
C:事件处理
D:事件监听
事件监听机制：A:事件源事件发生的地方B:事件就是要发生的事情C:事件处理就是针对发生的事情做出的处理方案D:事件监听 就是把事件源和事件关联起来举例：人受伤事件。事件源：人（具体的对象）Person p1 = new Person("张三");Person p2 = new Person("李四");事件：受伤interface 受伤接口 {一拳();一脚();一板砖();}事件处理：受伤处理类 implements 受伤接口 {一拳(){ System.out.println("鼻子流血了，送到卫生间洗洗"); }一脚(){ System.out.println("晕倒了，送到通风处"); }一板砖(){ System.out.println("头破血流，送到太平间"); }}事件监听：p1.注册监听(受伤接口)窗体布局
l简单的窗体创建过程：
•Frame f = new Frame(“my window”);//创建窗体对象
•f.setLayout(new FlowLayout());//指定窗体布局
•f.setSize(300,400);//设置窗体大小
•f.setLocation(300,200);//设置窗体出现在屏幕的位置
•f.setVisible(true);//设置窗体可见
创建一个带关闭功能的窗体(添加对窗体的监听对窗体关闭)
import java.awt.Frame;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;import java.awt.event.WindowListener;public class FrameDemo {public static void main(String[] args) {// 创建窗体对象Frame f = new Frame("窗体关闭案例");// 设置窗体属性f.setBounds(400, 200, 400, 300);// 让窗体关闭//事件源//事件：对窗体的处理//事件处理：关闭窗口(System.exit(0));//事件监听//用适配器类改进f.addWindowListener(new WindowAdapter() {@Overridepublic void windowClosing(WindowEvent e) {System.exit(0);}});// 设置窗体可见f.setVisible(true);}}(5)适配器模式(理解)
A:接口B:抽象适配器类
C:实现类
接口
/* * 针对用户操作的四种功能 */public interface UserDao {public abstract void add();public abstract void delete();public abstract void update();public abstract void find();}接口实现类
public class UserDaoImpl implements UserDao {@Overridepublic void add() {System.out.println("添加功能");}@Overridepublic void delete() {System.out.println("删除功能");}@Overridepublic void update() {System.out.println("修改功能");}@Overridepublic void find() {System.out.println("查找功能");}}抽象适配器类
public abstract class UserAdapter implements UserDao {@Overridepublic void add() {}@Overridepublic void delete() {}@Overridepublic void update() {}@Overridepublic void find() {}}继承适配器(实现接口指定功能)类
public class UserDaoImpl2 extends UserAdapter {@Overridepublic void add() {System.out.println("添加功能");}}测试调用类
/* * 问题： * 接口(方法比较多) -- 实现类(仅仅使用一个，也得把其他的实现给提供了，哪怕是空实现) * 太麻烦了。 * 解决方案： * 接口(方法比较多) -- 适配器类(实现接口,仅仅空实现) -- 实现类(用哪个重写哪个) */public class UserDaoDemo {public static void main(String[] args) {UserDao ud = new UserDaoImpl();ud.add();// 我没有说我们需要四种功能都实现啊。UserDao ud2 = new UserDaoImpl2();ud2.add();}}A:创建窗体案例
B:窗体关闭案例
C:窗体添加按钮并对按钮添加事件案例。
界面中的组件布局。
D:把文本框里面的数据转移到文本域
E:更改背景色
F:设置文本框里面不能输入非数字字符
G:一级菜单
H:多级菜单
(7)Netbeans的概述和使用
A:是可以做Java开发的另一个IDE工具。
1:如何让Netbeans的东西Eclipse能访问。
在Eclipse中创建项目，把Netbeans项目的src下的东西给拿过来即可。
注意：修改项目编码为UTF-8
A:四则运算
/* * 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 cn.itcast.view;import cn.itcast.util.UiUtil;import java.util.logging.Level;import java.util.logging.Logger;import javax.swing.JOptionPane;import javax.swing.UIManager;import javax.swing.UnsupportedLookAndFeelException;/** * * @author Administrator */public class NewJFrame extends javax.swing.JFrame { /** * Creates new form NewJFrame */ public NewJFrame() { initComponents(); init(); } public NewJFrame(String name) { initComponents(); init(name); } private void init() { this.setTitle("模拟四则运算"); UiUtil.setFrameImage(this,"jjcc.jpg"); UiUtil.setFrameCenter(this); } private void init(String name) { this.setTitle("欢迎"+name+"光临"); UiUtil.setFrameImage(this,"jjcc.jpg"); UiUtil.setFrameCenter(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">//GEN-BEGIN:initComponents private void initComponents() { jLabel1 = new javax.swing.JLabel(); jLabel2 = new javax.swing.JLabel(); jLabel3 = new javax.swing.JLabel(); firstNumber = new javax.swing.JTextField(); secondNumber = new javax.swing.JTextField(); resultNumber = new javax.swing.JTextField(); jLabel4 = new javax.swing.JLabel(); selectOperator = new javax.swing.JComboBox(); jButton1 = new javax.swing.JButton(); setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); jLabel1.setText("第一个操作数"); jLabel2.setText("第二个操作数"); jLabel3.setText("结果"); jLabel4.setText("="); selectOperator.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "+", "-", "*", "/" })); jButton1.setText("计算"); jButton1.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton1ActionPerformed(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(26, 26, 26) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false) .addComponent(firstNumber) .addComponent(jLabel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addComponent(selectOperator, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false) .addComponent(jLabel2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) .addComponent(secondNumber)) .addGap(14, 14, 14) .addComponent(jLabel4) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addComponent(jButton1) .addComponent(jLabel3) .addComponent(resultNumber, javax.swing.GroupLayout.PREFERRED_SIZE, 72, javax.swing.GroupLayout.PREFERRED_SIZE)) .addContainerGap(23, Short.MAX_VALUE)) ); layout.setVerticalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addContainerGap() .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(jLabel1) .addComponent(jLabel2) .addComponent(jLabel3)) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(firstNumber, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(secondNumber, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(resultNumber, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(jLabel4) .addComponent(selectOperator, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) .addGap(18, 18, 18) .addComponent(jButton1) .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)) ); pack(); }// </editor-fold>//GEN-END:initComponents private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton1ActionPerformed //获取第一个操作数 String firstNumberString = this.firstNumber.getText().trim(); //获取运算符 String selectOperator = this.selectOperator.getSelectedItem().toString(); //获取第二个操作数 String secondNumberString = this.secondNumber.getText().trim();// System.out.println(firstNumberString);// System.out.println(selectOperator);// System.out.println(secondNumberString); //数据校验,必须是数字字符串 String regex = "\\d+"; //校验第一个数 if (!firstNumberString.matches(regex)) {// System.out.println("数据不匹配"); //public static void showMessageDialog(Component parentComponent,Object message) JOptionPane.showMessageDialog(this, "第一个操作数不满足要求必须是数字"); this.firstNumber.setText(""); this.firstNumber.requestFocus(); return;//回去吧 } if (!secondNumberString.matches(regex)) {// System.out.println("数据不匹配"); //public static void showMessageDialog(Component parentComponent,Object message) JOptionPane.showMessageDialog(this, "第二个操作数不满足要求必须是数字"); this.secondNumber.setText(""); this.secondNumber.requestFocus(); return;//回去吧 } //把字符串数据转换为整数 int firstNumber = Integer.parseInt(firstNumberString); int secondNumber = Integer.parseInt(secondNumberString); //定义变量接收结果 int resultNumber = 0; switch (selectOperator) { case "+": resultNumber = firstNumber + secondNumber; break; case "-": resultNumber = firstNumber - secondNumber; break; case "*": resultNumber = firstNumber * secondNumber; break; case "/": if(secondNumber==0){ JOptionPane.showMessageDialog(this, "除数不能为0"); this.secondNumber.setText(""); this.secondNumber.requestFocus(); return; }else { resultNumber = firstNumber / secondNumber; } break; } //把结果赋值给结果框 this.resultNumber.setText(String.valueOf(resultNumber)); }//GEN-LAST:event_jButton1ActionPerformed /** * @param args the command line arguments */// public static void main(String args[]) {// /* Create and display the form */// java.awt.EventQueue.invokeLater(new Runnable() {// public void run() {// new NewJFrame().setVisible(true);// }// });// } // Variables declaration - do not modify//GEN-BEGIN:variables private javax.swing.JTextField firstNumber; private javax.swing.JButton jButton1; private javax.swing.JLabel jLabel1; private javax.swing.JLabel jLabel2; private javax.swing.JLabel jLabel3; private javax.swing.JLabel jLabel4; private javax.swing.JTextField resultNumber; private javax.swing.JTextField secondNumber; private javax.swing.JComboBox selectOperator; // End of variables declaration//GEN-END:variables}a:修改图标
b:设置皮肤
c:设置居中
/* * 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 cn.itcast.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() { } //修改窗体的图标 public static void setFrameImage(JFrame jf) { //获取工具类对象 //public static Toolkit getDefaultToolkit():获取默认工具包。 Toolkit tk = Toolkit.getDefaultToolkit(); //根据路径获取图片 Image i = tk.getImage("src\\cn\\itcast\\resource\\user.jpg"); //给窗体设置图片 jf.setIconImage(i); } public static void setFrameImage(JFrame jf,String imageName) { //获取工具类对象 //public static Toolkit getDefaultToolkit():获取默认工具包。 Toolkit tk = Toolkit.getDefaultToolkit(); //根据路径获取图片 Image i = tk.getImage("src\\cn\\itcast\\resource\\"+imageName); //给窗体设置图片 jf.setIconImage(i); } //设置窗体居中 public static void setFrameCenter(JFrame jf) { /* 思路： A:获取屏幕的宽和高 B:获取窗体的宽和高 C:(用屏幕的宽-窗体的宽)/2，(用屏幕的高-窗体的高)/2作为窗体的新坐标。 */ //获取工具对象 Toolkit tk = Toolkit.getDefaultToolkit(); //获取屏幕的宽和高 Dimension d = tk.getScreenSize(); double srceenWidth = d.getWidth(); double srceenHeigth = d.getHeight(); //获取窗体的宽和高 int frameWidth = jf.getWidth(); int frameHeight = jf.getHeight(); //获取新的宽和高 int width = (int) (srceenWidth - frameWidth) / 2; int height = (int) (srceenHeigth - frameHeight) / 2; //设置窗体坐标 jf.setLocation(width, height); }}d:数据校验
/* * 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 cn.itcast.view;import cn.itcast.dao.UserDao;import cn.itcast.dao.impl.UserDaoImpl;import cn.itcast.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,"user.jpg"); } /** * 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">//GEN-BEGIN:initComponents private void initComponents() { jLabel1 = new javax.swing.JLabel(); jLabel2 = new javax.swing.JLabel(); jtfUsername = new javax.swing.JTextField(); jpfPassword = new javax.swing.JPasswordField(); jButton1 = new javax.swing.JButton(); jButton2 = new javax.swing.JButton(); jButton3 = new javax.swing.JButton(); setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); jLabel1.setText("用户名："); jLabel2.setText("密码："); jButton1.setText("登录"); jButton1.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton1ActionPerformed(evt); } }); jButton2.setText("重置"); jButton2.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton2ActionPerformed(evt); } }); jButton3.setText("注册"); jButton3.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton3ActionPerformed(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(42, 42, 42) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addComponent(jLabel1) .addComponent(jLabel2)) .addGap(18, 18, 18) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false) .addComponent(jtfUsername, javax.swing.GroupLayout.DEFAULT_SIZE, 174, Short.MAX_VALUE) .addComponent(jpfPassword))) .addGroup(layout.createSequentialGroup() .addGap(64, 64, 64) .addComponent(jButton1) .addGap(18, 18, 18) .addComponent(jButton2) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED) .addComponent(jButton3))) .addContainerGap(61, Short.MAX_VALUE)) ); layout.setVerticalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addGap(47, 47, 47) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(jLabel1) .addComponent(jtfUsername, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) .addGap(31, 31, 31) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(jLabel2) .addComponent(jpfPassword, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) .addGap(54, 54, 54) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(jButton1) .addComponent(jButton2) .addComponent(jButton3)) .addContainerGap(48, Short.MAX_VALUE)) ); pack(); }// </editor-fold>//GEN-END:initComponents private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton3ActionPerformed RegistFrame rf = new RegistFrame(); rf.setVisible(true);// this.setVisible(false); this.dispose(); }//GEN-LAST:event_jButton3ActionPerformed private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton2ActionPerformed this.jtfUsername.setText(""); this.jpfPassword.setText(""); }//GEN-LAST:event_jButton2ActionPerformed private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton1ActionPerformed /* 思路： A:获取用户名和密码 B:正则表达式校验用户名和密码 C:创建对象调用功能，返回一个boolean值 D:根据boolean值给出提示 */ //获取用户名和密码 String username = this.jtfUsername.getText().trim(); String password = this.jpfPassword.getText().trim(); //用正则表达式做数据校验 //定义规则 //用户名规则 String usernameRegex = "[a-zA-z]{5}"; //密码规则 String passwordRegex = "\\w{6,12}"; //校验 if(!username.matches(usernameRegex)) { JOptionPane.showMessageDialog(this, "用户名不满足条件(5个英文字母组成)"); this.jtfUsername.setText(""); this.jtfUsername.requestFocus(); return; } if(!password.matches(passwordRegex)) { JOptionPane.showMessageDialog(this, "密码不满足条件(6-12个任意单词字符)"); this.jpfPassword.setText(""); this.jpfPassword.requestFocus(); return; } //创建对象调用功能，返回一个boolean值 UserDao ud = new UserDaoImpl(); boolean flag = ud.login(username, password); if(flag){ JOptionPane.showMessageDialog(this, "恭喜你登录成功");// NewJFrame njf = new NewJFrame(); NewJFrame njf = new NewJFrame(username); njf.setVisible(true); this.dispose(); }else { JOptionPane.showMessageDialog(this, "用户名或者密码有误"); this.jtfUsername.setText(""); this.jpfPassword.setText(""); this.jtfUsername.requestFocus(); } }//GEN-LAST:event_jButton1ActionPerformed /** * @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//GEN-BEGIN:variables private javax.swing.JButton jButton1; private javax.swing.JButton jButton2; private javax.swing.JButton jButton3; private javax.swing.JLabel jLabel1; private javax.swing.JLabel jLabel2; private javax.swing.JPasswordField jpfPassword; private javax.swing.JTextField jtfUsername; // End of variables declaration//GEN-END:variables}B:登录注册
/* * 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 cn.itcast.view;import cn.itcast.dao.UserDao;import cn.itcast.dao.impl.UserDaoImpl;import cn.itcast.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,"user.jpg"); } /** * 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">//GEN-BEGIN:initComponents private void initComponents() { jLabel1 = new javax.swing.JLabel(); jLabel2 = new javax.swing.JLabel(); jtfUsername = new javax.swing.JTextField(); jpfPassword = new javax.swing.JPasswordField(); jButton1 = new javax.swing.JButton(); jButton2 = new javax.swing.JButton(); jButton3 = new javax.swing.JButton(); setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); jLabel1.setText("用户名："); jLabel2.setText("密码："); jButton1.setText("登录"); jButton1.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton1ActionPerformed(evt); } }); jButton2.setText("重置"); jButton2.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton2ActionPerformed(evt); } }); jButton3.setText("注册"); jButton3.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton3ActionPerformed(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(42, 42, 42) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addComponent(jLabel1) .addComponent(jLabel2)) .addGap(18, 18, 18) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false) .addComponent(jtfUsername, javax.swing.GroupLayout.DEFAULT_SIZE, 174, Short.MAX_VALUE) .addComponent(jpfPassword))) .addGroup(layout.createSequentialGroup() .addGap(64, 64, 64) .addComponent(jButton1) .addGap(18, 18, 18) .addComponent(jButton2) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED) .addComponent(jButton3))) .addContainerGap(61, Short.MAX_VALUE)) ); layout.setVerticalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addGap(47, 47, 47) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(jLabel1) .addComponent(jtfUsername, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) .addGap(31, 31, 31) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(jLabel2) .addComponent(jpfPassword, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) .addGap(54, 54, 54) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(jButton1) .addComponent(jButton2) .addComponent(jButton3)) .addContainerGap(48, Short.MAX_VALUE)) ); pack(); }// </editor-fold>//GEN-END:initComponents private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton3ActionPerformed RegistFrame rf = new RegistFrame(); rf.setVisible(true);// this.setVisible(false); this.dispose(); }//GEN-LAST:event_jButton3ActionPerformed private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton2ActionPerformed this.jtfUsername.setText(""); this.jpfPassword.setText(""); }//GEN-LAST:event_jButton2ActionPerformed private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton1ActionPerformed /* 思路： A:获取用户名和密码 B:正则表达式校验用户名和密码 C:创建对象调用功能，返回一个boolean值 D:根据boolean值给出提示 */ //获取用户名和密码 String username = this.jtfUsername.getText().trim(); String password = this.jpfPassword.getText().trim(); //用正则表达式做数据校验 //定义规则 //用户名规则 String usernameRegex = "[a-zA-z]{5}"; //密码规则 String passwordRegex = "\\w{6,12}"; //校验 if(!username.matches(usernameRegex)) { JOptionPane.showMessageDialog(this, "用户名不满足条件(5个英文字母组成)"); this.jtfUsername.setText(""); this.jtfUsername.requestFocus(); return; } if(!password.matches(passwordRegex)) { JOptionPane.showMessageDialog(this, "密码不满足条件(6-12个任意单词字符)"); this.jpfPassword.setText(""); this.jpfPassword.requestFocus(); return; } //创建对象调用功能，返回一个boolean值 UserDao ud = new UserDaoImpl(); boolean flag = ud.login(username, password); if(flag){ JOptionPane.showMessageDialog(this, "恭喜你登录成功");// NewJFrame njf = new NewJFrame(); NewJFrame njf = new NewJFrame(username); njf.setVisible(true); this.dispose(); }else { JOptionPane.showMessageDialog(this, "用户名或者密码有误"); this.jtfUsername.setText(""); this.jpfPassword.setText(""); this.jtfUsername.requestFocus(); } }//GEN-LAST:event_jButton1ActionPerformed /** * @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//GEN-BEGIN:variables private javax.swing.JButton jButton1; private javax.swing.JButton jButton2; private javax.swing.JButton jButton3; private javax.swing.JLabel jLabel1; private javax.swing.JLabel jLabel2; private javax.swing.JPasswordField jpfPassword; private javax.swing.JTextField jtfUsername; // End of variables declaration//GEN-END:variables}注册
/* * 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 cn.itcast.view;import cn.itcast.dao.UserDao;import cn.itcast.dao.impl.UserDaoImpl;import cn.itcast.pojo.User;import cn.itcast.util.UiUtil;import javax.swing.JOptionPane;/** * * @author Administrator */public class RegistFrame extends javax.swing.JFrame { /** * Creates new form LoginFrame */ public RegistFrame() { initComponents(); init(); } private void init() { this.setTitle("注册界面"); this.setResizable(false); UiUtil.setFrameCenter(this); UiUtil.setFrameImage(this,"user.jpg"); } /** * 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">//GEN-BEGIN:initComponents private void initComponents() { jLabel1 = new javax.swing.JLabel(); jLabel2 = new javax.swing.JLabel(); jtfUsername = new javax.swing.JTextField(); jpfPassword = new javax.swing.JPasswordField(); jButton1 = new javax.swing.JButton(); jButton3 = new javax.swing.JButton(); setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); jLabel1.setText("用户名："); jLabel2.setText("密码："); jButton1.setText("取消"); jButton1.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton1ActionPerformed(evt); } }); jButton3.setText("注册"); jButton3.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton3ActionPerformed(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(42, 42, 42) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addComponent(jButton3) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) .addComponent(jButton1) .addGap(72, 72, 72)) .addGroup(layout.createSequentialGroup() .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addComponent(jLabel1) .addComponent(jLabel2)) .addGap(18, 18, 18) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false) .addComponent(jtfUsername, javax.swing.GroupLayout.DEFAULT_SIZE, 174, Short.MAX_VALUE) .addComponent(jpfPassword)) .addContainerGap(61, Short.MAX_VALUE)))) ); layout.setVerticalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addGap(47, 47, 47) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(jLabel1) .addComponent(jtfUsername, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) .addGap(31, 31, 31) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(jLabel2) .addComponent(jpfPassword, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 52, Short.MAX_VALUE) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(jButton3) .addComponent(jButton1)) .addGap(50, 50, 50)) ); pack(); }// </editor-fold>//GEN-END:initComponents private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton1ActionPerformed goLogin(); }//GEN-LAST:event_jButton1ActionPerformed private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton3ActionPerformed /* 分析： A:获取用户名和密码 B:用正则表达式做数据校验 C:封装成用户对象 D:调用用户操作的功能进行注册 E:回到登录界面 */ //获取用户名和密码 String username = this.jtfUsername.getText().trim(); String password = this.jpfPassword.getText().trim(); //用正则表达式做数据校验 //定义规则 //用户名规则 String usernameRegex = "[a-zA-z]{5}"; //密码规则 String passwordRegex = "\\w{6,12}"; //校验 if(!username.matches(usernameRegex)) { JOptionPane.showMessageDialog(this, "用户名不满足条件(5个英文字母组成)"); this.jtfUsername.setText(""); this.jtfUsername.requestFocus(); return; } if(!password.matches(passwordRegex)) { JOptionPane.showMessageDialog(this, "密码不满足条件(6-12个任意单词字符)"); this.jpfPassword.setText(""); this.jpfPassword.requestFocus(); return; } //封装成用户对象 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, "用户注册成功，回到登录界面"); goLogin(); }//GEN-LAST:event_jButton3ActionPerformed private void goLogin() { LoginFrame lf = new LoginFrame(); lf.setVisible(true); this.dispose(); } /** * @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(RegistFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);// } catch (InstantiationException ex) {// java.util.logging.Logger.getLogger(RegistFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);// } catch (IllegalAccessException ex) {// java.util.logging.Logger.getLogger(RegistFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);// } catch (javax.swing.UnsupportedLookAndFeelException ex) {// java.util.logging.Logger.getLogger(RegistFrame.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 RegistFrame().setVisible(true);// }// });// } // Variables declaration - do not modify//GEN-BEGIN:variables private javax.swing.JButton jButton1; private javax.swing.JButton jButton3; private javax.swing.JLabel jLabel1; private javax.swing.JLabel jLabel2; private javax.swing.JPasswordField jpfPassword; private javax.swing.JTextField jtfUsername; // End of variables declaration//GEN-END:variables} 0 0
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