第十一次实验课代码

添加C08~C011

C11-Swing/C11-Swing.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

C11-Swing/src/Main.java

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+import view.LoginFrame;
+
+public class Main {
+    public static void main(String[] args) {
+        new LoginFrame();
+    }
+}

C11-Swing/src/common/LoginStatus.java

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+package common;
+
+/**
+  * 登录状态枚举类
+  * 用final保证状态信息不可变，用static提供工具方法
+  */
+ public enum LoginStatus {
+        // 【任务3】枚举实例：状态码和描述
+        // 成功登录
+        SUCCESS(200,"登录成功"),
+        // 密码错误
+        PASSWORD_ERROR(901,"密码错误"),
+        // 验证码错误
+        CAPTCHA_ERROR(902,"验证码错误"),
+        // 用户不存在
+        USER_NOT_FOUND(903,"用户不存在");
+
+
+
+        // 【任务1】定义 final修饰的属性：确保状态信息不可修改
+        private final int code;
+        private final String msg;
+
+
+
+        /**
+         * 【任务2】
+         * 构造函数，用于创建LoginStatus实例
+         * @param code 状态码
+         * @param msg 状态消息
+         */
+        LoginStatus(int code, String msg) {
+            this.code = code;
+            this.msg = msg;
+        }
+
+        // 静态方法：根据状态码获取枚举实例（static工具方法）
+        /**
+         * 【任务4】
+         * 静态方法： getByCode 根据状态码获取对应的登录状态枚举值
+         * @param code 状态码
+         * @return LoginStatus 对应的LoginStatus枚举值，如果找不到匹配的状态码则返回null
+         */
+        public static LoginStatus getByCode(int code){
+            for(LoginStatus status:values()){
+                if(status.code==code){
+                    return status;
+                }
+            }
+            return null;
+        }
+
+        // getter方法（final属性无需setter）
+        /**
+         * 【任务5】
+         * 方法： getCode 获取code值
+         *
+         * @return int code值
+         */
+        public int getCode() {
+            return code;
+        }
+
+        /**
+         * 任务【6】
+         * 方法： getMsg 获取消息内容
+         *
+         * @return String 返回当前对象的消息字符串
+         */
+        public String getMsg() {
+            return msg;
+        }
+ }
+

C11-Swing/src/po/AccountPo.java

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+package po;
+
+public class AccountPo {
+    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;
+    }
+}

C11-Swing/src/service/AuthService.java

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+package service;
+
+import common.LoginStatus;
+import po.AccountPo;
+
+public class AuthService {
+    private static AccountPo dbAccount = new AccountPo();
+
+    static {
+        dbAccount.setUsername("admin");
+        dbAccount.setPassword("123456");
+    }
+
+    public LoginStatus login(AccountPo account) {
+        //1.获取用户输入的账号在数据库中查询该账号信息
+        //2.账号不存在
+        //3.账号存在 比较密码是否一致
+        if (dbAccount.getUsername().equals(account.getUsername()) &&
+                dbAccount.getPassword().equals(account.getPassword()))
+            return LoginStatus.SUCCESS;
+        else if (!dbAccount.getUsername().equals(account.getUsername())) {
+            return LoginStatus.USER_NOT_FOUND;
+        }
+        return LoginStatus.PASSWORD_ERROR;
+    }
+}
+

C11-Swing/src/utils/CaptchaUtils.java

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+package utils;
+
+import java.util.Random;
+
+/**
+ * 验证码工具类
+ */
+public class CaptchaUtils {  // final修饰类：不能被继承
+    // 【任务1】静态常量：字符集（全局固定）
+    static final String CHAR_SET="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
+
+    // 【任务2】静态常量：验证码长度（全局固定）
+    static final int CAPTCHA_LENGTH=4;
+
+    // 【任务3】私有构造方法：禁止创建实例（工具类无需实例化）
+    private CaptchaUtils(){
+    }
+
+    /**
+     * 【任务4】
+     * 静态方法：generateCaptcha 生成随机验证码
+     * @return String 返回生成的随机验证码字符串
+     */
+    public static String generateCaptcha(){
+        Random random = new Random();
+        //生成随机验证码
+        StringBuilder sb = new StringBuilder();
+        for(int i=0;i<CAPTCHA_LENGTH;i++){
+            //生成随机数索引
+            int index = random.nextInt(CHAR_SET.length());
+            //根据索引获取随机字符
+            sb.append(CHAR_SET.charAt(index));
+        }
+        return sb.toString();
+    }
+    /**
+     * 【任务5】
+     * 静态方法：verifyCaptcha 验证验证码 
+     * @param inputCaptcha 用户输入的验证码
+     * @param systemCaptcha 系统生成的验证码
+     * @return boolean 验证结果，true表示验证通过，false表示验证失败
+     */
+    public static boolean verifyCaptcha(String inputCaptcha,String systemCaptcha){
+        return inputCaptcha.equalsIgnoreCase(systemCaptcha);
+    }
+
+    public static void main(String[] args) {
+        for(int i=0;i<10;i++)
+            System.out.println(generateCaptcha());
+
+        System.out.println(CaptchaUtils.verifyCaptcha(generateCaptcha(), generateCaptcha()));
+    }
+
+}

C11-Swing/src/view/LoginFrame.java

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+package view;
+
+import common.LoginStatus;
+import utils.CaptchaUtils;
+import service.AuthService;
+import po.AccountPo;
+
+import javax.swing.*;
+import java.awt.*;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+
+
+public class LoginFrame extends JFrame {
+    private JPanel mainPanel;//中间层面板
+    private JTextField usernameTextField;//用户名输入框
+    private JPasswordField passwordField;//密码输入框
+    private JTextField captchaTextField;//验证码输入框
+    private JLabel captchaLabel;//验证码标签
+    private JButton loginButton;//登录按钮
+    private JButton registerButton;//注册按钮
+    private AuthService authService = new AuthService();
+    public LoginFrame() {
+        //初始化界面
+        initView();
+        //注册监听器
+        initListener();
+        usernameTextField.setText("admin");
+        passwordField.setText("123456");
+        captchaTextField.setText(captchaLabel.getText());
+    }
+    //顶层容器
+    private void initView(){
+        //1.设置标题
+        setTitle("登录");
+        //2.设置点击关闭时的动作
+        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        //3.中间层容器
+        add(initPanel());
+        //4.不允许窗口改变大小
+        setResizable(false);
+        //5.自动调整窗口大小 居中显示
+        pack();//自动调整窗口大小
+        setLocationRelativeTo(null);//剧中
+        //6.显示窗口
+        setVisible(true);
+    }
+
+    private void initListener(){
+        captchaLabel.addMouseListener(new MouseAdapter() {
+            @Override
+            public void mouseClicked(MouseEvent e) {
+                captchaLabel.setText(CaptchaUtils.generateCaptcha());
+            }
+        });
+
+        loginButton.addActionListener(e -> {
+            //点击注册按钮后的事件
+            String username = usernameTextField.getText();
+            String password = passwordField.getText();
+            String captcha = captchaTextField.getText();
+            //System.out.println("用户名" + username + " 密码" + password + " 验证码" + captcha);
+            if(username.equals("")||password.equals("")||captcha.equals("")) {
+                JOptionPane.showMessageDialog(this, "请填写完整信息！", "提示", JOptionPane.INFORMATION_MESSAGE);
+                return;
+            }
+            if(!CaptchaUtils.verifyCaptcha(captcha,captchaLabel.getText())){
+                JOptionPane.showMessageDialog(this, LoginStatus.CAPTCHA_ERROR.getMsg(), "提示", JOptionPane.INFORMATION_MESSAGE);
+                return;
+            }
+            AccountPo account = new AccountPo();
+            account.setUsername(username);
+            account.setPassword(password);
+            LoginStatus loginStatus = authService.login(account);
+            if(loginStatus == LoginStatus.SUCCESS) {
+                //进入主界面
+                MainFrame mainFrame = new MainFrame();
+                this.dispose();
+            }
+            else if(loginStatus == LoginStatus.USER_NOT_FOUND) {
+                JOptionPane.showMessageDialog(this, LoginStatus.USER_NOT_FOUND.getMsg(), "提示", JOptionPane.INFORMATION_MESSAGE);
+                return;
+            }
+            else if(loginStatus == LoginStatus.PASSWORD_ERROR) {
+                JOptionPane.showMessageDialog(this, LoginStatus.PASSWORD_ERROR.getMsg(), "提示", JOptionPane.INFORMATION_MESSAGE);
+                return;
+            }
+            else{
+                JOptionPane.showMessageDialog(this, loginStatus.getMsg(), "提示", JOptionPane.INFORMATION_MESSAGE);
+            }
+        });
+        registerButton.addActionListener(e -> {
+            //点击注册按钮后的事件
+            return;
+        });
+    }
+    private JPanel initPanel(){
+        mainPanel = new JPanel();
+        GridLayout gridLayout = new GridLayout(6,1,10,10);
+        mainPanel.setLayout(gridLayout);
+        //第1层 空白面板 占用
+        mainPanel.add(new JPanel());
+        //第2层 账号面板
+        mainPanel.add(initAcountPanel());
+        //第3层 密码面板
+        mainPanel.add(initPasswordPanel());
+        //第4层 验证码面板
+        mainPanel.add(initCaptchaPanel());
+        //第5层 按钮面板
+        mainPanel.add(initButtonPanel());
+        //第6层 空白面板 占用
+        return mainPanel;
+    }
+    /**
+     * 初始化账户信息面板
+     * @return 包含用户名输入框的面板组件
+     */
+    private JPanel initAcountPanel(){
+        JPanel panel = new JPanel();
+        panel.setLayout(new GridLayout(1,4,10,0));
+        JLabel label = new JLabel("用户名：");
+        //让label居右
+        label.setHorizontalAlignment(SwingConstants.RIGHT);
+        usernameTextField = new JTextField(15);
+        panel.add(label);
+        panel.add(usernameTextField);
+        panel.add(new JPanel());
+        return panel;
+    }
+
+    /**
+     * 初始化密码输入面板
+     * @return 包含密码标签和输入框的JPanel面板
+     */
+    private JPanel initPasswordPanel(){
+        JPanel panel = new JPanel();
+        // 设置网格布局，1行4列，水平间距10像素
+        panel.setLayout(new GridLayout(1,4,10,0));
+        JLabel label = new JLabel("密    码：");
+        // 设置标签文本右对齐
+        label.setHorizontalAlignment(SwingConstants.RIGHT);
+        passwordField = new JPasswordField(15);
+        panel.add(label);
+        panel.add(passwordField);
+        // 添加空白面板占位
+        panel.add(new JPanel());
+        return panel;
+    }
+
+
+    /**
+     * 初始化验证码面板
+     *
+     * @return 包含验证码相关组件的JPanel面板
+     */
+    private JPanel initCaptchaPanel(){
+        // 创建面板并设置网格布局
+        JPanel panel = new JPanel();
+        panel.setLayout(new GridLayout(1,4,10,0));
+
+        // 创建验证码标签
+        JLabel label = new JLabel("验证码：");
+        label.setHorizontalAlignment(SwingConstants.RIGHT);
+
+        // 创建验证码输入框和验证码显示标签
+        captchaTextField = new JTextField(4);
+        captchaLabel = new JLabel(CaptchaUtils.generateCaptcha());
+
+        // 将组件添加到面板中
+        panel.add(label);
+        panel.add(captchaTextField);
+        panel.add(captchaLabel);
+
+        return panel;
+    }
+
+
+    private JPanel initButtonPanel(){
+        JPanel panel = new JPanel();
+        panel.setLayout(new GridLayout(1,4,10,0));
+        loginButton = new JButton("登录");
+        registerButton = new JButton("注册");
+        panel.add(new JPanel());
+        panel.add(loginButton);
+        panel.add(registerButton);
+        panel.add(new JPanel());
+        return panel;
+    }
+
+
+
+}

C11-Swing/src/view/MainFrame.java

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+package view;
+
+import javax.swing.*;
+
+public class MainFrame {
+    JFrame frame = new JFrame();
+}