From 543af56cc2a741c46321a33148b90d507a24afbb Mon Sep 17 00:00:00 2001 From: pc9pizjb6 <122855890@qq.com> Date: Sat, 1 Nov 2025 23:45:42 +0800 Subject: [PATCH] ADD file via upload --- MainApp.java | 196 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 196 insertions(+) create mode 100644 MainApp.java diff --git a/MainApp.java b/MainApp.java new file mode 100644 index 0000000..8012096 --- /dev/null +++ b/MainApp.java @@ -0,0 +1,196 @@ +package com.studentmanagement; + +import com.studentmanagement.controller.StudentController; +import com.studentmanagement.model.Student; +import com.studentmanagement.util.InputUtil; +import com.studentmanagement.view.StudentConsoleView; +import com.studentmanagement.view.StudentView; + +/** + * 学生管理系统主应用类 + * 应用程序的入口点，初始化MVC组件并启动系统 + */ +public class MainApp { + public static void main(String[] args) { + // 初始化MVC组件 + StudentView studentView = new StudentConsoleView(); + StudentController studentController = new StudentController(studentView); + + // 启动应用 + runApplication(studentController, (StudentConsoleView) studentView); + } + + /** + * 运行应用程序主循环 + * @param controller 学生控制器 + * @param view 学生控制台视图 + */ + private static void runApplication(StudentController controller, StudentConsoleView view) { + boolean running = true; + + while (running) { + // 显示主菜单 + view.displayMainMenu(); + + // 获取用户选择 + int choice = InputUtil.getIntInput(""); + + // 根据选择执行相应操作 + switch (choice) { + case 1: + addStudent(controller); + break; + case 2: + controller.displayAllStudents(); + break; + case 3: + findStudentById(controller); + break; + case 4: + updateStudent(controller); + break; + case 5: + deleteStudent(controller); + break; + case 6: + filterStudentsByCourse(controller); + break; + case 7: + filterStudentsByGradeRange(controller); + break; + case 8: + calculateAverageGradeByCourse(controller); + break; + case 9: + controller.calculateAverageAge(); + break; + case 0: + running = false; + System.out.println("\n感谢使用学生管理系统，再见！"); + break; + default: + System.out.println("无效的选择，请重新输入"); + break; + } + + // 如果不是退出，等待用户确认继续 + if (running && choice != 0) { + InputUtil.waitForEnter(); + } + } + } + + /** + * 添加学生 + * @param controller 学生控制器 + */ + private static void addStudent(StudentController controller) { + String id = InputUtil.getStringInput("请输入学生ID: "); + String name = InputUtil.getStringInput("请输入学生姓名: "); + int age = InputUtil.getIntInput("请输入学生年龄: "); + String gender = InputUtil.getStringInput("请输入学生性别: "); + + Student student = new Student(id, name, age, gender); + + // 添加课程成绩 + boolean addMoreCourses = true; + while (addMoreCourses) { + String course = InputUtil.getStringInput("请输入课程名称 (输入空字符串结束): "); + if (course.isEmpty()) { + addMoreCourses = false; + } else { + double grade = InputUtil.getDoubleInput("请输入该课程成绩: "); + student.addCourseGrade(course, grade); + } + } + + controller.addStudent(student); + } + + /** + * 根据ID查找学生 + * @param controller 学生控制器 + */ + private static void findStudentById(StudentController controller) { + String id = InputUtil.getStringInput("请输入要查找的学生ID: "); + controller.findStudentById(id); + } + + /** + * 更新学生信息 + * @param controller 学生控制器 + */ + private static void updateStudent(StudentController controller) { + String id = InputUtil.getStringInput("请输入要更新的学生ID: "); + + // 先查找学生是否存在 + try { + // 这里我们直接创建一个新的学生对象来更新 + String name = InputUtil.getStringInput("请输入新的学生姓名: "); + int age = InputUtil.getIntInput("请输入新的学生年龄: "); + String gender = InputUtil.getStringInput("请输入新的学生性别: "); + + Student updatedStudent = new Student(id, name, age, gender); + + // 添加课程成绩 + boolean addCourses = InputUtil.getConfirmation("是否添加/更新课程成绩"); + if (addCourses) { + boolean addMoreCourses = true; + while (addMoreCourses) { + String course = InputUtil.getStringInput("请输入课程名称 (输入空字符串结束): "); + if (course.isEmpty()) { + addMoreCourses = false; + } else { + double grade = InputUtil.getDoubleInput("请输入该课程成绩: "); + updatedStudent.addCourseGrade(course, grade); + } + } + } + + controller.updateStudent(updatedStudent); + } catch (Exception e) { + System.out.println("更新失败: " + e.getMessage()); + } + } + + /** + * 删除学生 + * @param controller 学生控制器 + */ + private static void deleteStudent(StudentController controller) { + String id = InputUtil.getStringInput("请输入要删除的学生ID: "); + if (InputUtil.getConfirmation("确定要删除该学生吗？")) { + controller.deleteStudent(id); + } else { + System.out.println("删除操作已取消"); + } + } + + /** + * 根据课程筛选学生 + * @param controller 学生控制器 + */ + private static void filterStudentsByCourse(StudentController controller) { + String course = InputUtil.getStringInput("请输入课程名称: "); + controller.filterStudentsByCourse(course); + } + + /** + * 根据成绩范围筛选学生 + * @param controller 学生控制器 + */ + private static void filterStudentsByGradeRange(StudentController controller) { + double minGrade = InputUtil.getDoubleInput("请输入最低成绩: "); + double maxGrade = InputUtil.getDoubleInput("请输入最高成绩: "); + controller.filterStudentsByGradeRange(minGrade, maxGrade); + } + + /** + * 计算课程平均成绩 + * @param controller 学生控制器 + */ + private static void calculateAverageGradeByCourse(StudentController controller) { + String course = InputUtil.getStringInput("请输入课程名称: "); + controller.calculateAverageGradeByCourse(course); + } +} \ No newline at end of file