管理系统，师生管理系统 java实现

package edu.info.manager.controller; import edu.info.manager.domain.Teacher; import edu.info.manager.service.TeacherService; import java.util.Scanner; public class TeacherController { private Scanner sc = new Scanner(System.in); private TeacherService teacherService = new TeacherService(); public void start() { while (true) { System.out.println("-----欢迎来到老师管理系统-----"); System.out.println("请输入你的选择：1.添加老师 2.删除老师 3.修改老师 4.查看老师 5.退出"); int choice = sc.nextInt(); switch (choice) { case 1: //System.out.println("添加老师"); addTeacher(); break; case 2: //System.out.println("删除老师"); deleteTeacherById(); break; case 3: //System.out.println("修改老师"); updateTeacher(); break; case 4: //System.out.println("查看老师"); findAllTeacher(); break; case 5: System.out.println("感谢你使用老师管理系统"); return; default: System.out.println("你的输入有误，请重新输入"); } } } public void updateTeacher() { String id = inputTeacherId(); Teacher newTeacher = inputTeacherInfo(id); //调用业务员的修改方法 teacherService.updateTeacher(id, newTeacher); System.out.println("修改成功"); } public void deleteTeacherById() { String id = inputTeacherId(); //2.调用业务员中的删除方法 teacherService.deleteTeacherById(id); //3.提示删除成功 System.out.println("删除成功"); } public void findAllTeacher() { //1.从业务员中，获取老师对象数组 Teacher[] teachers = teacherService.findAllTeacher(); //2.判断数组中是否有元素 if (teachers == null) { System.out.println("查无信息，请添加后重试"); return; } //3.遍历数组，取出元素，打印在控制台 System.out.println("学号\t\t姓名\t年龄\t生日"); for (int i = 0; i < teachers.length; i++) { Teacher t = teachers[i]; if (t != null) { System.out.println(t.getId() + "\t" + t.getName() + "\t" + t.getAge() + "\t\t" + t.getBirthaday()); } } } public void addTeacher() { String id; while (true) { //接收不存在的老师id System.out.println("请输入老师id"); id = sc.next(); //2.判读id是否存在 boolean exists = teacherService.isExists(id); if (exists) { System.out.println("id已被占用，请重新输入"); } else { break; } } Teacher t = inputTeacherInfo(id); //5.将封装好的老师对象传递给TeacherService，继续王城添加操作 boolean result = teacherService.addTeacher(t); if (result) { System.out.println("添加成功"); } else { System.out.println("添加失败"); } } //录入老师id public String inputTeacherId() { String id; while (true) { System.out.println("请输入老师的id"); id = sc.next(); boolean exists = teacherService.isExists(id); if (!exists) { System.out.println("您输入的id不存在，请重新输入"); } else { break; } } return id; } //录入老师信息，封装为老师对象 public Teacher inputTeacherInfo(String id) { System.out.println("请输入老师的姓名"); String name = sc.next(); System.out.println("请输入老师的年龄"); String age = sc.next(); System.out.println("请输入老师的生日"); String birthday = sc.next(); //4.封装为老师对象 Teacher t = new Teacher(); t.setId(id); t.setName(name); t.setAge(age); t.setBirthaday(birthday); return t; } }