效果图：
代码：
package com.example.dingtalk.question;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Random;
/***
* 小学计算题生成
*/
public class MathExerciseGenerator extends JFrame {
private JComboBox<String> operationComboBox;
private JButton generateButton;
private JButton evaluateButton;
private JButton showAnswersButton;
private JTextArea questionArea;
private JTextField answerField;
public MathExerciseGenerator() {
super("小学生数学练习题目生成系统");
initComponents();
}
private void initComponents() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLayout(new BorderLayout());
operationComboBox = new JComboBox<>(new String[]{
"10以内加法", "10以内减法", "20以内加法", "20以内减法", "100以内加法", "100以内减法", "100以内乘法", "100以内除法"});
generateButton = new JButton("出题");
evaluateButton = new JButton("评卷");
showAnswersButton = new JButton("答案");
questionArea = new JTextArea(20, 40);
answerField = new JTextField(10);
JPanel topPanel = new JPanel();
topPanel.add(new JLabel("选择题目类型: "));
topPanel.add(operationComboBox);
topPanel.add(generateButton);
topPanel.add(evaluateButton);
topPanel.add(showAnswersButton);
add(topPanel, BorderLayout.NORTH);
add(new JScrollPane(questionArea), BorderLayout.CENTER);
add(answerField, BorderLayout.SOUTH);
generateButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
generateQuestions();
}
});
evaluateButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
evaluateAnswers();
}
});
showAnswersButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
showAnswers();
}
});
pack();
setLocationRelativeTo(null);
}
private void generateQuestions() {
int numQuestions = 20;
String operation = (String) operationComboBox.getSelectedItem();
StringBuilder questions = new StringBuilder();
StringBuilder answers = new StringBuilder(); // 用于存储答案
Random random = new Random();
for (int i = 0; i < numQuestions; i++) {
int operand1 = random.nextInt(100) + 1;
int operand2 = random.nextInt(100) + 1;
String question = "";
switch (operation) {
case "10以内加法":
operand1 = random.nextInt(10) + 1;
operand2 = random.nextInt(10) + 1;
question = operand1 + " + " + operand2 + " = ";
break;
case "10以内减法":
operand1 = random.nextInt(10) + 1;
operand2 = random.nextInt(operand1) + 1;
question = operand1 + " - " + operand2 + " = ";
break;
case "20以内加法":
operand1 = random.nextInt(20) + 1;
operand2 = random.nextInt(20) + 1;
question = operand1 + " + " + operand2 + " = ";
break;
case "20以内减法":
operand1 = random.nextInt(20) + 1;
operand2 = random.nextInt(operand1) + 1;
question = operand1 + " - " + operand2 + " = ";
break;
case "100以内加法":
operand1 = random.nextInt(100) + 1;
operand2 = random.nextInt(100) + 1;
question = operand1 + " + " + operand2 + " = ";
break;
case "100以内减法":
operand1 = random.nextInt(100) + 1;
operand2 = random.nextInt(operand1) + 1;
question = operand1 + " - " + operand2 + " = ";
break;
case "100以内乘法":
operand1 = random.nextInt(100) + 1;
operand2 = random.nextInt(100) + 1;
question = operand1 + " * " + operand2 + " = ";
break;
case "100以内除法":
operand2 = random.nextInt(100) + 1;
operand1 = operand2 * (random.nextInt(10) + 1);
question = operand1 + " / " + operand2 + " = ";
break;
default:
break;
}
questions.append(question).append("\n");
// 生成并附加答案
int result = calculateResult(operand1 + " " + getOperationSymbol(operation) + " " + operand2);
answers.append(result).append("\n");
}
questionArea.setText(questions.toString());
answerField.setText(answers.toString()); // 将答案设置到答案文本框
}
// 获取操作符
private String getOperationSymbol(String operation) {
switch (operation) {
case "10以内加法":
case "20以内加法":
case "100以内加法":
return "+";
case "10以内减法":
case "20以内减法":
case "100以内减法":
return "-";
case "100以内乘法":
return "*";
case "100以内除法":
return "/";
default:
return "";
}
}
private void evaluateAnswers() {
String[] answers = questionArea.getText().split("\n");
String[] userResponses = answerField.getText().split(" ");
StringBuilder evaluation = new StringBuilder();
for (int i = 0; i < answers.length; i++) {
if (i < userResponses.length) {
String answer = extractAnswer(answers[i].trim()); // 从完整表达式中提取答案部分
String userAnswer = userResponses[i].trim();
String result = answer.equals(userAnswer) ? "√" : "x";
evaluation.append(result).append("\n");
}
}
JOptionPane.showMessageDialog(this, evaluation.toString(), "评卷结果", JOptionPane.INFORMATION_MESSAGE);
}
// 从完整表达式中提取答案部分
private String extractAnswer(String fullExpression) {
// 以等号分割表达式，并取第二部分作为答案
String[] parts = fullExpression.split("=");
if (parts.length == 2) {
return parts[1].trim();
} else {
return "";
}
}
private void showAnswers() {
String[] questions = questionArea.getText().split("\n");
StringBuilder correctAnswers = new StringBuilder();
for (String question : questions) {
String[] parts = question.split("=");
if (parts.length == 2) {
String expression = parts[0].trim();
int result = calculateResult(expression);
correctAnswers.append(expression).append(" = ").append(result).append("\n");
}
}
JOptionPane.showMessageDialog(this, correctAnswers.toString(), "正确答案", JOptionPane.INFORMATION_MESSAGE);
}
private int calculateResult(String expression) {
try {
// 使用 ScriptEngineManager 计算表达式
ScriptEngineManager manager = new ScriptEngineManager();
ScriptEngine engine = manager.getEngineByName("js");
return (int) engine.eval(expression);
} catch (ScriptException e) {
e.printStackTrace();
}
return 0;
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new MathExerciseGenerator().setVisible(true);
}
});
}
}
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