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@ -1,3 +0,0 @@
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Manifest-Version: 1.0
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Main-Class: Main
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@ -1,30 +0,0 @@
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package account;
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public class Account {
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private String userName;
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private String password;
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private String userType;
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public Account(String userName, String password,String userType) {
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this.userName = userName;
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this.password = password;
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this.userType = userType;
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}
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public String getUserType() {
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return userType;
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}
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public String getUserName() {
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return userName;
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}
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public String getPassword() {
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return password;
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}
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public void setUserType(String userType) {
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this.userType = userType;
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}
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}
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@ -1,5 +0,0 @@
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package account;
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public interface AccountService {
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Account login(String username, String password);
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}
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@ -1,30 +0,0 @@
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package account;
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import java.util.HashMap;
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import java.util.Map;
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public class SimpleAccountService implements AccountService {
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private static final Map<String, Account> accounts = new HashMap<>();
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static {
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accounts.put("张三1", new Account("张三1", "123", "小学"));
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accounts.put("张三2", new Account("张三2", "123", "小学"));
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accounts.put("张三3", new Account("张三3", "123", "小学"));
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accounts.put("李四1", new Account("李四1", "123", "初中"));
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accounts.put("李四2", new Account("李四2", "123", "初中"));
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accounts.put("李四3", new Account("李四3", "123", "初中"));
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accounts.put("王五1", new Account("王五1", "123", "高中"));
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accounts.put("王五2", new Account("王五2", "123", "高中"));
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accounts.put("王五3", new Account("王五3", "123", "高中"));
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}
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@Override
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public Account login(String username, String password) {
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Account account = accounts.get(username);
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if (account != null && account.getPassword().equals(password)) {
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return account;
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}
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return null;
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}
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}
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@ -1,29 +0,0 @@
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package persistence;
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import question.Question;
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import java.io.File;
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import java.io.FileWriter;
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import java.io.IOException;
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import java.time.LocalDateTime;
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import java.time.format.DateTimeFormatter;
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import java.util.List;
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public class FileSaver {
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public static void saveQuestions(String username, List<Question> questions) {
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File dir = new File(username);
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if (!dir.exists()) dir.mkdirs();
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String filename = LocalDateTime.now().format(
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DateTimeFormatter.ofPattern("yyyy-MM-dd-HH-mm-ss")) + ".txt";
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try (FileWriter writer = new FileWriter(new File(dir, filename))) {
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for (int i = 0; i < questions.size(); i++) {
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writer.write((i + 1) + ". " + questions.get(i).getQuestion() + "\n\n");
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}
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} catch (IOException e) {
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e.printStackTrace();
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}
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System.out.println("题目已生成并保存！");
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}
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}
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@ -1,26 +0,0 @@
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package question;
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import java.util.Random;
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public class HighQuestionGenerator implements QuestionGenerator {
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private static final Random random = new Random();
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private final QuestionGenerator primaryGenerator = new PrimaryQuestionGenerator();
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@Override
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public Question generateQuestion() {
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Question q = primaryGenerator.generateQuestion();
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String[] funcs = {"sin", "cos", "tan"};
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String func = funcs[random.nextInt(funcs.length)];
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return new Question(func + "(" + q.getQuestion() + ")", evaluate(func, q.getQuestion()));
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}
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private String evaluate(String func, String expr) {
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try {
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javax.script.ScriptEngineManager mgr = new javax.script.ScriptEngineManager();
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javax.script.ScriptEngine engine = mgr.getEngineByName("JavaScript");
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return String.valueOf(engine.eval("Math." + func + "(Math.toRadians(" + expr + "))"));
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} catch (Exception e) {
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return "?";
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}
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}
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}
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@ -1,28 +0,0 @@
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package question;
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import java.util.Random;
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public class MiddleQuestionGenerator implements QuestionGenerator {
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private static final Random random = new Random();
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private final QuestionGenerator primaryGenerator = new PrimaryQuestionGenerator();
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@Override
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public Question generateQuestion() {
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Question q = primaryGenerator.generateQuestion();
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if (random.nextBoolean()) {
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return new Question(q.getQuestion() + " ^ 2", evaluate(q.getQuestion() + "^2"));
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} else {
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return new Question("√" + q.getQuestion(), evaluate("Math.sqrt(" + q.getQuestion() + ")"));
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}
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}
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private String evaluate(String expr) {
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try {
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javax.script.ScriptEngineManager mgr = new javax.script.ScriptEngineManager();
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javax.script.ScriptEngine engine = mgr.getEngineByName("JavaScript");
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return String.valueOf(engine.eval(expr.replace("^", "**")));
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} catch (Exception e) {
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return "?";
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}
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}
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}
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@ -1,65 +0,0 @@
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package question;
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import java.util.Random;
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public class PrimaryQuestionGenerator implements QuestionGenerator {
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private static final Random random = new Random();
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@Override
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public Question generateQuestion() {
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int numOperands = random.nextInt(5) + 1;
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StringBuilder sb = new StringBuilder();
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int currentValue = random.nextInt(100) + 1;
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sb.append(currentValue);
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for (int i = 1; i < numOperands; i++) {
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String[] ops = {"+", "-", "*", "/"};
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String op;
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int nextVal;
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do {
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op = ops[random.nextInt(ops.length)];
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nextVal = random.nextInt(100) + 1;
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} while ((op.equals("-") && currentValue < nextVal) ||
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(op.equals("/") && (nextVal == 0 || currentValue % nextVal != 0)));
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sb.append(" ").append(op).append(" ").append(nextVal);
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switch (op) {
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case "+": currentValue += nextVal; break;
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case "-": currentValue -= nextVal; break;
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case "*": currentValue *= nextVal; break;
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case "/": currentValue /= nextVal; break;
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}
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}
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String expr = addParentheses(sb.toString());
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return new Question(expr, evaluate(expr));
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}
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private String addParentheses(String expr) {
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String[] tokens = expr.split(" ");
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if (tokens.length < 3) return expr;
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int start = random.nextInt(tokens.length / 2) * 2;
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int end = start + 2 + random.nextInt((tokens.length - start) / 2) * 2;
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end = Math.min(end, tokens.length - 1);
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StringBuilder newExpr = new StringBuilder();
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for (int i = 0; i < tokens.length; i++) {
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if (i == start) newExpr.append("(");
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newExpr.append(tokens[i]);
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if (i == end) newExpr.append(")");
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if (i != tokens.length - 1) newExpr.append(" ");
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}
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return newExpr.toString();
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}
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private String evaluate(String expr) {
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try {
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javax.script.ScriptEngineManager mgr = new javax.script.ScriptEngineManager();
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javax.script.ScriptEngine engine = mgr.getEngineByName("JavaScript");
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return String.valueOf(engine.eval(expr));
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} catch (Exception e) {
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return "?";
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}
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}
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}
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@ -1,20 +0,0 @@
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package question;
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public class Question {
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private String question;
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private String answer;
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public Question(String question, String answer) {
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this.question = question;
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this.answer = answer;
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}
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public String getQuestion() {
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return question;
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}
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public String getAnswer() {
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return answer;
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}
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}
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@ -1,5 +0,0 @@
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package question;
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public interface QuestionGenerator {
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Question generateQuestion();
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}
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