面向对象程序设计 课程实验 六

01_Intellij_Java_universal_20240419/01_Intellij_Java_universal_20240419.iml

@@ -0,0 +1,12 @@
+<?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://$MODULE_DIR$/untitled/ch11" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/untitled/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

01_Intellij_Java_universal_20240419/untitled/file2.txt

@@ -1 +0,0 @@
-7153-767-7764-9819-6754-3453-9423-86-5411-7717-9489-5214-5481-6695-8273

01_Intellij_Java_universal_20240419/untitled/src/javaAssignment_20240528/Customer.java

@@ -6,36 +6,31 @@
 
 package javaAssignment_20240528;
 
-public class Customer implements Runnable{
+public class Customer implements Runnable {
     // 用户姓名
     private String customerName;
     // 存取次数
-    private int customerNum;
+    private int customerNum = 3;
 
     // 构造函数
-    public Customer (String customerName){
-        this.customerName = customerName;
-    }
+    // public Customer (String customerName){
+    //     this.customerName = customerName;
+    // }
 
     // 重写 run 方法
     @Override
-    public void run (){
+    public void run() {
         // 重复指定次数
-        for (int i = 0; i < this.customerNum; i++){
+        for (int i = 0; i < this.customerNum; i++) {
             // 输出用户存款信息
-            System.out.println("User: " + this.customerName + " Deposit 100");
+            System.out.println("User: " + Thread.currentThread().getName() + " Deposit 100");
             // 调用存款方法
             deposit(100);
         }
     }
 
     // 存款方法
-    private synchronized void deposit (int amount){
+    private synchronized void deposit(int amount) {
         Bank.Funds(amount);
     }
-
-    // 设置存款次数
-    public void setDepositNum(int num){
-        this.customerNum = num;
-    }
 }

01_Intellij_Java_universal_20240419/untitled/src/javaAssignment_20240528/test.java

@@ -39,22 +39,17 @@ public class test {
         *   Class
         *       1. Bank.java
         *       2. Customer.java
-        *
+        */
 
         // 通过 Bank 类实例化 b_1 对象
         Bank b_1 = new Bank("Best Nigger Bank");
 
         // 通过 Customer 实例化两个用户对象
-        Customer c_1 = new Customer("Todd");
-        Customer c_2 = new Customer("KoDick");
-
-        // 调用其中的方法设置每个人的存款次数
-        c_1.setDepositNum(3);
-        c_2.setDepositNum(3);
+        Customer c_1 = new Customer();
 
         // 通过 Thread 实例化两个线程类
-        Thread t_1 = new Thread(c_1);
-        Thread t_2 = new Thread(c_2);
+        Thread t_1 = new Thread(c_1, "Todd");
+        Thread t_2 = new Thread(c_1, "Todd Copy");
 
         // 在开始存款前输出一次银行当前的余额
         System.out.println("Now Bank Balance: " + b_1.getBankBalance());
@@ -74,6 +69,6 @@ public class test {
         // 输出当前银行余额
         System.out.println("Now Bank Balance: " + b_1.getBankBalance());
 
-        */
+        /**/
     }
 }

01_Intellij_Java_universal_20240419/untitled/src/javaAssignment_20240614/function_01.java

@@ -0,0 +1,62 @@
+/*
+ *   Function: Java 课程实验 六 - 题目 01
+ *   Date: 2024 06 14
+ *   Code by: JRNitre
+ * */
+
+package javaAssignment_20240614;
+
+import javax.swing.*;
+import java.awt.*;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+
+public class function_01 extends Frame implements ActionListener{
+
+    Label userLabel, passLabel;
+    TextField userField;
+    JPasswordField passField;
+    Button loginButton;
+
+    public function_01() {
+        // 设置窗口属性
+        setTitle("User Login");
+        setSize(300, 200);
+        // setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        setLayout(new FlowLayout());
+
+        // 添加组件
+        userLabel = new Label("User Id:");
+        add(userLabel);
+        userField = new TextField(15);
+        add(userField);
+
+        passLabel = new Label("Password:");
+        add(passLabel);
+        passField = new JPasswordField(15);
+        add(passField);
+
+        loginButton = new Button("Login");
+        loginButton.addActionListener(this);
+        add(loginButton);
+
+        setVisible(true);
+    }
+
+    public void actionPerformed(ActionEvent e) {
+        if (e.getSource() == loginButton) {
+            String username = userField.getText();
+            String password = new String(passField.getPassword());
+            if (isValidUser(username, password)) {
+                dispose(); // 关闭当前窗口
+                JOptionPane.showMessageDialog(null, "Login Done!");
+            } else {
+                JOptionPane.showMessageDialog(null, "Error!");
+            }
+        }
+    }
+
+    private boolean isValidUser(String username, String password) {
+        return "user".equals(username) && "pass".equals(password);
+    }
+}

01_Intellij_Java_universal_20240419/untitled/src/javaAssignment_20240614/function_02.java

@@ -0,0 +1,96 @@
+/*
+ *   Function: Java 课程实验 六 - 题目 02
+ *   Date: 2024 06 14
+ *   Code by: JRNitre
+ * */
+
+package javaAssignment_20240614;
+
+import java.awt.*;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import javax.swing.*;
+
+public class function_02 extends JFrame {
+    JLabel num1Label, num2Label, resultLabel;
+    JTextField num1Field, num2Field, resultField;
+    JComboBox<String> operationComboBox;
+    JButton calculateButton;
+
+    public function_02() {
+        super("计算器");
+
+        // 初始化组件
+        num1Label = new JLabel("数字1:");
+        num2Label = new JLabel("数字2:");
+        resultLabel = new JLabel("结果:");
+        num1Field = new JTextField(10);
+        num2Field = new JTextField(10);
+        resultField = new JTextField(10);
+        resultField.setEditable(false); // 结果字段不可编辑
+        operationComboBox = new JComboBox<>(new String[]{"+", "-", "*", "/"});
+        calculateButton = new JButton("计算");
+
+        // 添加动作监听器
+        calculateButton.addActionListener(new ActionListener() {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                calculate();
+            }
+        });
+
+        // 设置布局
+        setLayout(new GridLayout(4, 2));
+
+        // 添加组件到窗口
+        add(num1Label);
+        add(num1Field);
+        add(num2Label);
+        add(num2Field);
+        add(new JLabel()); // 空白占位
+        add(operationComboBox);
+        add(resultLabel);
+        add(resultField);
+        add(new JLabel()); // 空白占位
+        add(calculateButton);
+
+        // 设置窗口属性
+        setSize(300, 150);
+        setDefaultCloseOperation(EXIT_ON_CLOSE);
+        setLocationRelativeTo(null); // 居中显示
+        setVisible(true);
+    }
+
+    private void calculate() {
+        try {
+            double num1 = Double.parseDouble(num1Field.getText());
+            double num2 = Double.parseDouble(num2Field.getText());
+            String operation = (String) operationComboBox.getSelectedItem();
+            double result = 0;
+
+            switch (operation) {
+                case "+":
+                    result = num1 + num2;
+                    break;
+                case "-":
+                    result = num1 - num2;
+                    break;
+                case "*":
+                    result = num1 * num2;
+                    break;
+                case "/":
+                    if (num2 != 0)
+                        result = num1 / num2;
+                    else {
+                        JOptionPane.showMessageDialog(this, "除数不能为0!");
+                        return;
+                    }
+                    break;
+            }
+
+            resultField.setText(String.valueOf(result));
+        } catch (NumberFormatException ex) {
+            JOptionPane.showMessageDialog(this, "请输入有效的数字!");
+        }
+    }
+}

01_Intellij_Java_universal_20240419/untitled/src/javaAssignment_20240614/function_03.java

@@ -0,0 +1,62 @@
+/*
+ *   Function: Java 课程实验 六 - 题目 03
+ *   Date: 2024 06 14
+ *   Code by: JRNitre
+ * */
+
+package javaAssignment_20240614;
+
+import javax.swing.*;
+import java.awt.*;
+import java.awt.event.ItemEvent;
+import java.awt.event.ItemListener;
+
+public class function_03 {
+
+    public function_03(){
+        SwingUtilities.invokeLater(() -> {
+            createAndShowGUI();
+        });
+    }
+
+    private static void createAndShowGUI() {
+        JFrame frame = new JFrame("选项事件处理");
+        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        frame.setLayout(new FlowLayout());
+
+        JTextArea textArea = new JTextArea("选顶事件ItemEvent的使用方法", 6, 20);
+        textArea.setEditable(false);
+        frame.add(textArea);
+
+        JRadioButton redButton = new JRadioButton("红色");
+        JRadioButton blueButton = new JRadioButton("蓝色");
+
+        ButtonGroup group = new ButtonGroup();
+        group.add(redButton);
+        group.add(blueButton);
+
+        ItemListener itemListener = new ItemListener() {
+            @Override
+            public void itemStateChanged(ItemEvent e) {
+                if (e.getStateChange() == ItemEvent.SELECTED) {
+                    Object source = e.getSource();
+
+                    if (source == redButton) {
+                        textArea.setForeground(Color.RED);
+                    } else if (source == blueButton) {
+                        textArea.setForeground(Color.BLUE);
+                    }
+                }
+            }
+        };
+
+        redButton.addItemListener(itemListener);
+        blueButton.addItemListener(itemListener);
+
+        frame.add(redButton);
+        frame.add(blueButton);
+
+        frame.pack();
+        frame.setVisible(true);
+    }
+}

01_Intellij_Java_universal_20240419/untitled/src/javaAssignment_20240614/test.java

@@ -0,0 +1,49 @@
+/*
+ *   Function: Java 课程实验 六
+ *   Date: 2024 06 14
+ *   Code by: JRNitre
+ * */
+
+package javaAssignment_20240614;
+
+public class test {
+    public static void main (String[] args){
+
+        /*
+        *   设计实现一个用户登录页面，当单击登录按钮用户名密码正确跳转到计算页面。
+        *
+        *   Class: function_01.java
+        *
+
+        function_01 f_1 = new function_01();
+
+        */
+
+        /* ( つ•̀ω•́)つ :-D */
+
+        /*
+        *   设计实现一个计算页面，实现两个数的加法、减法、乘法和除法运算。
+        *
+        *   Class: function_02.java
+        *
+
+        function_02 f_2 = new function_02();
+
+        */
+
+        /* ( つ•̀ω•́)つ :-D */
+
+        /*
+        *   编写一个应用程序，标题为“选项事件处理”的窗口，窗口布局为FlowLayout。
+        *   设计两个单选按钮，一个文本区。
+        *   单击单选按钮时，将文本区中的文字设置成为相应颜色的字体。
+        *
+        *   Class: function_03.java
+        *
+
+        function_03 f_3 = new function_03();
+
+        */
+
+    }
+}

01_Intellij_Java_universal_20240419/untitled/src/javaPackage_20240524/function.java

@@ -1,10 +1,14 @@
 package javaPackage_20240524;
 
+import java.io.*;
 import java.security.SecureRandom;
 
 public class function {
+    // 数组长度
     private int ArrayMaxLength;
 
+    private String fileName;
+
     public int[] createRandomArray(int num, int min, int max){
         this.ArrayMaxLength = num;
         int[] array = new int[this.ArrayMaxLength];
@@ -12,7 +16,76 @@ public class function {
         for (int i = 0; i < this.ArrayMaxLength; i++){
             array[i] = min + secureRandom.nextInt(max - min + 1);
         }
+        System.out.println("Create Random Array Done!");
         return array;
     }
 
+    public void createFile (String fileName){
+        this.fileName = fileName;
+        File file = new File(fileName);
+        try {
+            if (file.createNewFile()){
+                System.out.println("Create file Done!");
+            } else {
+                System.out.println("Create file Error!");
+            }
+        } catch (IOException ioe){
+            System.out.println("Create file Error!");
+            ioe.printStackTrace();
+        }
+    }
+
+    public void writeFile (String data){
+        try {
+            BufferedWriter writer = new BufferedWriter(new FileWriter(this.fileName));
+            writer.write(data);
+            writer.close();
+            System.out.println("Writer Done!");
+        } catch (IOException ioe){
+            System.out.println("Writer Error!");
+        }
+    }
+
+    public int[] readeFileToInt(){
+        try {
+            BufferedReader reader = new BufferedReader(new FileReader(this.fileName));
+            String line = reader.readLine();
+
+            String[] arrayStr = line.split("-");
+
+            int[] arrayInt = new int[this.ArrayMaxLength];
+            for (int i = 0; i < this.ArrayMaxLength; i++){
+                arrayInt[i] = Integer.parseInt(arrayStr[i]);
+            }
+            System.out.println("Reader File Done!");
+            return arrayInt;
+        } catch (IOException ioe){
+            System.out.println("Reader File Error!");
+            return new int[0];
+        }
+    }
+
+    public void bubbleSort(int[] array){
+        int m = array.length;
+
+        for (int i = 0; i < m; i++){
+            for (int j = 0; j < m - i - 1; i++){
+                if (array[j] > array[j+1]){
+                    int temp = array[j];
+                    array[j] = array[j + 1];
+                    array[j + 1] = temp;
+                }
+            }
+        }
+
+        System.out.println("Sort Done!");
+
+        for (int k = 0; k < m; k++){
+            System.out.print(array[k]);
+            if (k != m - 1){
+                System.out.print(" - ");
+            }
+        }
+    }
+
 }

01_Intellij_Java_universal_20240419/untitled/src/javaPackage_20240524/test.java

@@ -9,6 +9,19 @@ public class test {
          */
         function f_1 = new function();
 
-    f_1.createRandomArray(15, 20, 9999);
+        int array[] = f_1.createRandomArray(15, 20, 9999);
+
+        f_1.createFile("file2.txt");
+        StringBuilder s_1 = new StringBuilder();
+        for (int i = 0; i < array.length; i++){
+            s_1.append(array[i]);
+            if (i != array.length - 1){
+                s_1.append("-");
+            }
+        }
+
+        f_1.writeFile(s_1.toString());
+
+        f_1.bubbleSort(f_1.readeFileToInt());
     }
 }

01_Intellij_Java_universal_20240419/untitled/src/javaPackage_20240531/bank.java

@@ -0,0 +1,19 @@
+package javaPackage_20240531;
+
+public class bank {
+    private static int money;
+
+    private String bankNmae;
+
+    public bank (String name){
+        this.bankNmae = name;
+    }
+
+    public int getMoney(){
+        return money;
+    }
+
+    public static synchronized void add (int n){
+        money += n;
+    }
+}

01_Intellij_Java_universal_20240419/untitled/src/javaPackage_20240531/customer.java

@@ -0,0 +1,19 @@
+package javaPackage_20240531;
+
+public class customer implements Runnable{
+
+    private static final int num = 3;
+
+    @Override
+    public void run(){
+        for (int i = 0; i < num; i++){
+            System.out.println("User: " + Thread.currentThread().getName() + " add 100");
+            customerAdd(100);
+        }
+    }
+
+    public synchronized void customerAdd(int n){
+        bank.add(n);
+    }
+
+}

01_Intellij_Java_universal_20240419/untitled/src/javaPackage_20240531/test.java

@@ -0,0 +1,28 @@
+package javaPackage_20240531;
+
+public class test {
+    public static void main (String[] args){
+        /*
+         *   1. 设某家银行可接受用户的存款，每进行一次存款，便可计算出存款的总额。
+         *   2. 现有两名顾客，每人分3次、每次存入100元。
+         */
+
+        bank b = new bank("Bank");
+        customer c = new customer();
+
+        Thread t_1 = new Thread(c, "todd");
+        Thread t_2 = new Thread(c, "Copy todd");
+
+        System.out.println("Now Bank: " + b.getMoney());
+
+        t_1.start();
+        t_2.start();
+
+        try {
+            t_1.join();
+            t_2.join();
+        } catch (Exception e){}
+
+        System.out.println("Now Bank: " + b.getMoney());
+    }
+}

02_Intellij_Java_CourseExperiment_20240611/CourseExperiment/.idea/.gitignore

@@ -0,0 +1,3 @@
+# 默认忽略的文件
+/shelf/
+/workspace.xml

02_Intellij_Java_CourseExperiment_20240611/CourseExperiment/.idea/encodings.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Encoding">
+    <file url="file://$PROJECT_DIR$/src/ElmAdminEntry.java" charset="GBK" />
+    <file url="file://$PROJECT_DIR$/src/View/AdminView.java" charset="GBK" />
+    <file url="file://$PROJECT_DIR$/src/View/display.java" charset="GBK" />
+    <file url="file://$PROJECT_DIR$/src/dao/AdminDaoImpl.java" charset="GBK" />
+    <file url="file://$PROJECT_DIR$/src/jdbc/JDBC.java" charset="GBK" />
+  </component>
+</project>

02_Intellij_Java_CourseExperiment_20240611/CourseExperiment/.idea/misc.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_17" default="true" project-jdk-name="17" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>

02_Intellij_Java_CourseExperiment_20240611/CourseExperiment/.idea/modules.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/CourseExperiment.iml" filepath="$PROJECT_DIR$/CourseExperiment.iml" />
+    </modules>
+  </component>
+</project>

02_Intellij_Java_CourseExperiment_20240611/CourseExperiment/.idea/uiDesigner.xml

@@ -0,0 +1,124 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Palette2">
+    <group name="Swing">
+      <item class="com.intellij.uiDesigner.HSpacer" tooltip-text="Horizontal Spacer" icon="/com/intellij/uiDesigner/icons/hspacer.svg" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="1" hsize-policy="6" anchor="0" fill="1" />
+      </item>
+      <item class="com.intellij.uiDesigner.VSpacer" tooltip-text="Vertical Spacer" icon="/com/intellij/uiDesigner/icons/vspacer.svg" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="6" hsize-policy="1" anchor="0" fill="2" />
+      </item>
+      <item class="javax.swing.JPanel" icon="/com/intellij/uiDesigner/icons/panel.svg" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="3" hsize-policy="3" anchor="0" fill="3" />
+      </item>
+      <item class="javax.swing.JScrollPane" icon="/com/intellij/uiDesigner/icons/scrollPane.svg" removable="false" auto-create-binding="false" can-attach-label="true">
+        <default-constraints vsize-policy="7" hsize-policy="7" anchor="0" fill="3" />
+      </item>
+      <item class="javax.swing.JButton" icon="/com/intellij/uiDesigner/icons/button.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="3" anchor="0" fill="1" />
+        <initial-values>
+          <property name="text" value="Button" />
+        </initial-values>
+      </item>
+      <item class="javax.swing.JRadioButton" icon="/com/intellij/uiDesigner/icons/radioButton.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="3" anchor="8" fill="0" />
+        <initial-values>
+          <property name="text" value="RadioButton" />
+        </initial-values>
+      </item>
+      <item class="javax.swing.JCheckBox" icon="/com/intellij/uiDesigner/icons/checkBox.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="3" anchor="8" fill="0" />
+        <initial-values>
+          <property name="text" value="CheckBox" />
+        </initial-values>
+      </item>
+      <item class="javax.swing.JLabel" icon="/com/intellij/uiDesigner/icons/label.svg" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="0" anchor="8" fill="0" />
+        <initial-values>
+          <property name="text" value="Label" />
+        </initial-values>
+      </item>
+      <item class="javax.swing.JTextField" icon="/com/intellij/uiDesigner/icons/textField.svg" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1">
+          <preferred-size width="150" height="-1" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JPasswordField" icon="/com/intellij/uiDesigner/icons/passwordField.svg" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1">
+          <preferred-size width="150" height="-1" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JFormattedTextField" icon="/com/intellij/uiDesigner/icons/formattedTextField.svg" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1">
+          <preferred-size width="150" height="-1" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JTextArea" icon="/com/intellij/uiDesigner/icons/textArea.svg" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
+          <preferred-size width="150" height="50" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JTextPane" icon="/com/intellij/uiDesigner/icons/textPane.svg" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
+          <preferred-size width="150" height="50" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JEditorPane" icon="/com/intellij/uiDesigner/icons/editorPane.svg" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
+          <preferred-size width="150" height="50" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JComboBox" icon="/com/intellij/uiDesigner/icons/comboBox.svg" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="0" hsize-policy="2" anchor="8" fill="1" />
+      </item>
+      <item class="javax.swing.JTable" icon="/com/intellij/uiDesigner/icons/table.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
+          <preferred-size width="150" height="50" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JList" icon="/com/intellij/uiDesigner/icons/list.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="6" hsize-policy="2" anchor="0" fill="3">
+          <preferred-size width="150" height="50" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JTree" icon="/com/intellij/uiDesigner/icons/tree.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
+          <preferred-size width="150" height="50" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JTabbedPane" icon="/com/intellij/uiDesigner/icons/tabbedPane.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="3" hsize-policy="3" anchor="0" fill="3">
+          <preferred-size width="200" height="200" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JSplitPane" icon="/com/intellij/uiDesigner/icons/splitPane.svg" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="3" hsize-policy="3" anchor="0" fill="3">
+          <preferred-size width="200" height="200" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JSpinner" icon="/com/intellij/uiDesigner/icons/spinner.svg" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1" />
+      </item>
+      <item class="javax.swing.JSlider" icon="/com/intellij/uiDesigner/icons/slider.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1" />
+      </item>
+      <item class="javax.swing.JSeparator" icon="/com/intellij/uiDesigner/icons/separator.svg" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3" />
+      </item>
+      <item class="javax.swing.JProgressBar" icon="/com/intellij/uiDesigner/icons/progressbar.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="0" fill="1" />
+      </item>
+      <item class="javax.swing.JToolBar" icon="/com/intellij/uiDesigner/icons/toolbar.svg" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="0" fill="1">
+          <preferred-size width="-1" height="20" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JToolBar$Separator" icon="/com/intellij/uiDesigner/icons/toolbarSeparator.svg" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="0" anchor="0" fill="1" />
+      </item>
+      <item class="javax.swing.JScrollBar" icon="/com/intellij/uiDesigner/icons/scrollbar.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="6" hsize-policy="0" anchor="0" fill="2" />
+      </item>
+    </group>
+  </component>
+</project>

02_Intellij_Java_CourseExperiment_20240611/CourseExperiment/.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/../.." vcs="Git" />
+  </component>
+</project>

02_Intellij_Java_CourseExperiment_20240611/CourseExperiment/CourseExperiment.iml

@@ -0,0 +1,12 @@
+<?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" />
+    <orderEntry type="library" name="mysql-connector-j-8.4.0" level="project" />
+  </component>
+</module>

02_Intellij_Java_CourseExperiment_20240611/CourseExperiment/src/ElmAdminEntry.java

@@ -0,0 +1,118 @@
+
+import View.AdminView;
+import View.Display;
+import po.Admin;
+
+import java.io.IOException;
+import java.util.Scanner;
+import java.util.stream.StreamSupport;
+
+public class ElmAdminEntry {
+    public static void main(String[] args){
+        new ElmAdminEntry().work();
+    }
+
+    public void work(){
+
+        Integer mistake = 0;
+        Integer maxMistake = 3;
+        Integer errorCode = 0;
+        Integer mainExitCode = 0;
+
+        Scanner sca = new Scanner(System.in);
+        AdminView adminView = new AdminView();
+        Display dis = new Display('+', '-', 30);
+
+        while (mistake < maxMistake && mainExitCode == 0){
+            dis.titleLine("登录 饿了么后台管理系统", true);
+            if (mistake != 0){
+                System.out.println("+ 当前错误次数: "  + mistake + "   剩余次数: " + (maxMistake - mistake));
+            }
+            System.out.print("+ 账户: ");
+            String userInputAdminName = sca.next();
+            System.out.print("+ 密码: ");
+            String userInputAdminPassworld = sca.next();
+
+            Admin admin = adminView.login(userInputAdminName, userInputAdminPassworld);
+
+            if (admin != null){
+                int key = -1;
+                while (key != 10){
+
+                    dis.titleLine("Admin - " + admin.getAdminName(), true);
+                    dis.showItem("[0] 所有商家列表", true);
+                    dis.showItem("[1] 搜索商家", true);
+                    dis.showItem("[2] 新建商家", true);
+                    dis.showItem("[3] 删除商家", true);
+                    dis.showItem("[4] 查看管理员信息", true);
+                    dis.showItem("[5] 设置管理员密码", true);
+                    dis.showItem("[10] 退出系统", true);
+                    dis.showLine(true);
+
+                    System.out.print("+ 请输入对应的操作数: ");
+                    key = sca.nextInt();
+
+                    switch (key){
+                        case 0:
+                            break;
+                        case 1:
+                        case 2:
+                        case 3:
+                        case 4:
+                            // TODO 解决 nextLine 问题
+                            dis.titleLine("管理员信息", true);
+                            System.out.println("+ 管理员 ID:\t" + admin.getAdminId());
+                            System.out.println("+ 管理员名:\t" + admin.getAdminName());
+                            System.out.println("+ 管理员密码:\t" + admin.getAdminPassword());
+                            sca.nextLine();
+                            break;
+                        case 5:
+                            dis.titleLine("设置管理员密码", true);
+                            System.out.print("+ 输入当前密码: ");
+                            String newPassword = sca.next();
+
+                            if (!(newPassword.equals(admin.getAdminPassword()))){
+                                dis.titleLine("ERROR", true);
+                                System.out.println("密码不一致!");
+                                break;
+                            }
+
+                            // TODO 密码校验
+                            System.out.println("+ 输入新密码: ");
+                            newPassword = sca.next();
+
+                            admin.setAdminPassword(newPassword);
+                            adminView.updatePassword(admin);
+                            break;
+
+                        case 10:
+                            errorCode = 2;
+                            mainExitCode = 1;
+                            break;
+                        default:
+                            dis.titleLine("ERROR", true);
+                            System.out.println("+ 操作数不合法!");
+                            break;
+                    }
+                }
+            } else {
+                mistake++;
+            }
+            if (mistake >= maxMistake){
+                errorCode = 1;
+            }
+        }
+
+        if (errorCode == 1){
+            dis.titleLine("ERROR", true);
+            System.out.println("+ 错误次数过多，退出系统!");
+            System.exit(0);
+        }
+        if (errorCode == 2){
+            dis.titleLine("提示", true);
+            System.out.println("+ 系统退出");
+            System.exit(0);
+        }
+
+    }
+}

02_Intellij_Java_CourseExperiment_20240611/CourseExperiment/src/View/AdminView.java

@@ -0,0 +1,22 @@
+package View;
+
+import dao.AdminDaoImpl;
+import po.Admin;
+
+import java.util.Scanner;
+
+public class AdminView {
+    public Admin login(String name, String passworld){
+        Admin admin = null;
+
+        admin = new AdminDaoImpl().getAdminByNameByPass(name, passworld);
+
+        return admin;
+    }
+
+    public void updatePassword(Admin admin){
+        System.out.println("+ ÃÜÂë¸üÐÂÖÐ...");
+
+        new AdminDaoImpl().updateAdminPassword(admin);
+    }
+}

02_Intellij_Java_CourseExperiment_20240611/CourseExperiment/src/View/Display.java

@@ -0,0 +1,70 @@
+package View;
+
+public class Display {
+
+    private char displayNode;
+    private char displayLine;
+
+    private Integer displayWidth;
+
+    public Display (char node, char line, Integer width){
+        displayNode = node;
+        displayLine = line;
+        displayWidth = width;
+    }
+
+    public void setWidth(Integer width){
+        displayWidth = width;
+    }
+
+    public void titleLine (String title, boolean newLine){
+        StringBuilder str = new StringBuilder();
+
+        Integer space = (displayWidth - title.length() - 2) / 2;
+
+        str.append(displayNode);
+        for (int i = 0; i < space; i++){
+            str.append(displayLine);
+        }
+        str.append(title);
+        for (int i = 0; i < space; i++){
+            str.append(displayLine);
+        }
+        str.append(displayNode);
+
+        System.out.print(str.toString());
+        if (newLine){
+            System.out.println();
+        }
+    }
+
+    public void showItem(String item, boolean newLine){
+        StringBuilder str = new StringBuilder();
+
+        str.append(displayNode).append("   ");
+        str.append(item);
+
+        Integer space = displayWidth - 1 - ("+   ".length() + item.length());
+
+        System.out.print(str.toString());
+        if (newLine){
+            System.out.println();
+        }
+    }
+
+    public void showLine(boolean newLine){
+        StringBuilder str = new StringBuilder();
+
+        str.append(displayNode);
+        for (int i = 0; i < displayWidth - 2; i++){
+            str.append(displayLine);
+        }
+        str.append(displayNode);
+
+        System.out.print(str.toString());
+        if (newLine){
+            System.out.println();
+        }
+    }
+
+}

02_Intellij_Java_CourseExperiment_20240611/CourseExperiment/src/dao/AdminDao.java

@@ -0,0 +1,9 @@
+package dao;
+
+import po.Admin;
+
+public interface AdminDao {
+    Admin getAdminByNameByPass(String adminName, String password);
+
+    void updateAdminPassword(Admin admin);
+}

02_Intellij_Java_CourseExperiment_20240611/CourseExperiment/src/dao/AdminDaoImpl.java

@@ -0,0 +1,76 @@
+package dao;
+
+import jdbc.JDBC;
+import po.Admin;
+
+import java.sql.*;
+
+public class AdminDaoImpl implements AdminDao{
+//    @Override
+//    public Admin getAdminByNameByPass(String adminName, String password){
+//        Map<Integer, Admin> map = AdminMap.ADMIN_MAP;//取得所有管理员的数据
+//        Collection<Admin> values = map.values();//取得map中值的集合
+//
+//        //遍历值的集合，判断是否有数据与参数的名称和密码匹配，如果有，则表示登录成功
+//        Admin admin = null;
+//        for(Admin tmp : values ) {
+//            if(tmp.getAdminName().equals(adminName) && tmp.getAdminPassworld().equals(password)) {
+//                admin = tmp;
+//                break;
+//            }
+//        }
+//
+//        return admin;
+//    }
+
+    @Override
+    public Admin getAdminByNameByPass(String adminName, String password) {
+        Admin admin = null;
+        try {
+            // 连接数据库
+            Connection conn = JDBC.getConnection();
+            Statement stmt = conn.createStatement();
+
+            String sql = "SELECT * FROM admin WHERE adminName = '" + adminName + "' AND adminPassword = '" + password + "'";
+
+            ResultSet rs = stmt.executeQuery(sql);
+
+            if (rs.next()) {
+                admin = new Admin();
+                admin.setAdminId(rs.getInt("adminId"));
+                admin.setAdminName(rs.getString("adminName"));
+                admin.setAdminPassword(rs.getString("adminPassword"));
+            }
+
+            conn.close();
+            stmt.close();
+            rs.close();
+        } catch (SQLException e) {
+            System.err.println("Database error occurred: " + e.getMessage());
+        } catch (Exception e) {
+            System.err.println("Unexpected error: " + e.getMessage());
+        }
+        return admin;
+    }
+
+    @Override
+    public void updateAdminPassword(Admin admin) {
+        // TODO 完善密码更新功能
+        try {
+            Connection conn = JDBC.getConnection();
+            Statement stmt = conn.createStatement();
+            System.out.println("+ 连接到数据库");
+
+            String sql = "UPDATE admin SET adminPassword = ?";
+            PreparedStatement pst = conn.prepareStatement(sql);
+            pst.setString(1, admin.getAdminPassword());
+            pst.executeUpdate();
+            System.out.println("+ 更新完毕");
+
+            stmt.close();
+            conn.close();
+        } catch (Exception e) {
+            System.err.println("Unexpected error: " + e.getMessage());
+        }
+    }
+}

02_Intellij_Java_CourseExperiment_20240611/CourseExperiment/src/data/AdminMap.java

@@ -0,0 +1,15 @@
+package data;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import po.Admin;
+
+public class AdminMap {
+    public static final Map<Integer, Admin> ADMIN_MAP = new HashMap<>();
+
+    static {
+        ADMIN_MAP.put(1, new Admin(1, "jrnitre", "123"));
+    }
+
+}

02_Intellij_Java_CourseExperiment_20240611/CourseExperiment/src/jdbc/JDBC.java

@@ -0,0 +1,23 @@
+package jdbc;
+
+import po.Admin;
+
+import java.beans.Expression;
+import java.sql.*;
+
+public class JDBC {
+
+    private static final String URL = "jdbc:mysql://124.220.110.170:3306/jrnitre";
+    private static final String user = "jrnitre";
+    private static final String Password = "npgt1365";
+
+    public static Connection getConnection() {
+        try {
+            Class.forName("com.mysql.cj.jdbc.Driver");
+            return DriverManager.getConnection(URL, user, Password);
+        } catch (ClassNotFoundException | SQLException e) {
+            e.printStackTrace();
+            throw new RuntimeException("Êý¾Ý¿âÁ¬½Óʧ°Ü", e);
+        }
+    }
+}

02_Intellij_Java_CourseExperiment_20240611/CourseExperiment/src/po/Admin.java

@@ -0,0 +1,45 @@
+package po;
+
+public class Admin {
+    // 管理员 ID
+    private Integer adminId;
+    // 管理员名
+    private String adminName;
+    // 管理员密码
+    private String adminPassword;
+
+    public Admin (Integer id, String name, String passworld){
+        super();
+        adminId = id;
+        adminName = name;
+        adminPassword = passworld;
+    }
+
+    public Admin (){
+        super();
+    }
+
+    public Integer getAdminId(){
+        return adminId;
+    }
+
+    public String getAdminName(){
+        return adminName;
+    }
+
+    public String getAdminPassword(){
+        return adminPassword;
+    }
+
+    public void setAdminId(Integer id){
+        adminId = id;
+    }
+
+    public void setAdminName(String name){
+        adminName = name;
+    }
+
+    public void setAdminPassword(String password){
+        adminPassword = password;
+    }
+}

02_Intellij_Java_CourseExperiment_20240611/CourseExperiment/src/po/Business.java

@@ -0,0 +1,4 @@
+package po;
+
+public class Business {
+}