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package com.student.view;
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import com.student.model.Student;
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import java.util.List;
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import java.util.Scanner;
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/**
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* 控制台学生视图实现类，负责在命令行界面展示学生信息和获取用户输入
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*/
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public class ConsoleStudentView implements StudentView {
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private final Scanner scanner;
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/**
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* 构造函数，初始化Scanner对象
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*/
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public ConsoleStudentView() {
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this.scanner = new Scanner(System.in);
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}
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@Override
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public void displayStudent(Student student) {
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if (student != null) {
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System.out.println("\n===== 学生信息 =====");
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System.out.println("ID: " + student.getId());
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System.out.println("姓名: " + student.getName());
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System.out.println("年龄: " + student.getAge());
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System.out.println("课程: " + student.getCourse());
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System.out.println("==================\n");
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} else {
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System.out.println("未找到该学生信息");
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}
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}
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@Override
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public void displayAllStudents(List<Student> students) {
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if (students.isEmpty()) {
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System.out.println("当前没有学生信息");
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return;
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}
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System.out.println("\n===== 所有学生信息 =====");
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System.out.printf("%-10s %-10s %-5s %-15s\n", "ID", "姓名", "年龄", "课程");
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System.out.println("----------------------------------------");
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for (Student student : students) {
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System.out.printf("%-10s %-10s %-5d %-15s\n",
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student.getId(),
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student.getName(),
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student.getAge(),
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student.getCourse());
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}
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System.out.println("========================================\n");
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}
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@Override
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public void displayMessage(String message) {
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System.out.println(message);
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}
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@Override
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public String getStudentIdInput() {
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System.out.print("请输入学生ID: ");
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return scanner.nextLine();
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}
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@Override
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public Student getStudentInput() {
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System.out.println("请输入学生信息:");
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System.out.print("ID: ");
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String id = scanner.nextLine();
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System.out.print("姓名: ");
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String name = scanner.nextLine();
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System.out.print("年龄: ");
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int age = Integer.parseInt(scanner.nextLine());
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System.out.print("课程: ");
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String course = scanner.nextLine();
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return new Student(id, name, age, course);
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}
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@Override
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public void displayMenu() {
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System.out.println("\n===== 学生管理系统 =====");
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System.out.println("1. 添加学生");
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System.out.println("2. 查看所有学生");
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System.out.println("3. 查找学生");
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System.out.println("4. 更新学生信息");
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System.out.println("5. 删除学生");
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System.out.println("0. 退出系统");
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System.out.println("=======================");
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}
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@Override
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public int getMenuChoice() {
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System.out.print("请选择操作 (0-5): ");
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try {
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return Integer.parseInt(scanner.nextLine());
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} catch (NumberFormatException e) {
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return -1; // 无效输入
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}
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}
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} |
