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手把手教你完成（Java）师生信息管理系统
对阶段一学到的知识进行应用，完成练手小项目。同时，也可以当做学校的课设来做。项目已上传 CSDN ，可以按需下载。
一、成果展示
- 添加学生（查看学生）
- 删除学生
- 添加老师(查看老师)
- 删除老师
二、实现步骤
就不写1、2、3、4了，按着顺序一步一来就好。为了避免出错可以模仿。
新建 project ，项目命名为 school-information-sysytem
创建模块，命名为school-edu-info-manager，选择自己电脑上配置好的 JDK，我电脑上安装的是12版本
创建包com.school.edu.info.manager
分别创建如下包，并在其下分别创建表中所示类
| 包 | 存储的类 | 作用 |
|---|---|---|
| com.itheima.edu.info.manager.domain | Student.java Teacher.java | 封装学生信息 封装老师信息 |
| com.itheima.edu.info.manager.dao | StudentDao.java TeacherDao.java | 访问存储数据的数组,进行赠删改查（库管） |
| com.itheima.edu.info.manager.service | StudentService.java TeacherService.java | 业务的逻辑处理（业务员） |
| com.itheima.edu.info.manager.controller | StudentController.java TeacherController.java | 和用户打交道（客服接待） |
| com.itheima.edu.info.manager.entry | InfoManagerEntry.java | 程序的入口类,提供一个main方法 |
环境搭建完成，将代码直接分别复制到类里面即可。（包名称不同的话，给包重命名就ok啦！）
1. damain包
Student.java
package com.school.edu.info.manager.damain; public class Student {
private String id; private String name; private String age; private String birthday; public Student() {
} public String getId() {
return id; } public void setId(String id) {
this.id = id; } public String getName() {
return name; } public void setName(String name) {
this.name = name; } public String getAge() {
return age; } public void setAge(String age) {
this.age = age; } public String getBirthday() {
return birthday; } public void setBirthday(String birthday) {
this.birthday = birthday; } } Teacher.java
package com.school.edu.info.manager.damain; public class Teacher {
private String id; private String name; private String age; private String birthday; public Teacher() {
} public String getId() {
return id; } public void setId(String id) {
this.id = id; } public String getName() {
return name; } public void setName(String name) {
this.name = name; } public String getAge() {
return age; } public void setAge(String age) {
this.age = age; } public String getBirthday() {
return birthday; } public void setBirthday(String birthday) {
this.birthday = birthday; } } 2. controller包
StudentController.java
package com.school.edu.info.manager.controller; import com.school.edu.info.manager.damain.Student; import com.school.edu.info.manager.service.StudentService; import java.util.Scanner; public class StudentController {
private StudentService studentService = new StudentService(); Scanner sc = new Scanner(System.in); // 开启学生管理系统, 并展示学生管理系统菜单 public void start() {
StudentLoop: while (true) {
System.out.println("--------欢迎来到 <学生> 管理系统--------"); System.out.println("请输入您的选择: 1.添加学生 2.删除学生 3.修改学生 4.查看学生 5.退出"); String choice = sc.next(); switch (choice) {
case "1": //System.out.println("添加"); addStudent(); break; case "2": // System.out.println("删除"); deleteStudentById(); break; case "3": // System.out.println("修改"); uppDateStudent(); break; case "4": // System.out.println("查看"); findAllStudent(); break; case "5": System.out.println("感谢您使用学生管理系统, 再见!"); break StudentLoop; default: System.out.println("您的输入有误，请重新输入"); break; } } } public void uppDateStudent() {
String uppdateId = inputStudentId(); Student newstu = inputStudentInfo(uppdateId); studentService.uppDateStudent(uppdateId, newstu); System.out.println("修改成功！"); } public void deleteStudentById() {
String delId = inputStudentId(); studentService.deleteStudentById(delId); System.out.println("删除成功!"); } // 查看学生方法 public void findAllStudent() {
// 1. 调用业务员中的获取方法, 得到学生的对象数组 Student[] stus = studentService.findAllStudent(); // 2. 判断数组的内存地址, 是否为null if (stus == null) {
System.out.println("查无信息, 请添加后重试"); } System.out.println("学号\t\t姓名\t\t年龄\t\t生日"); // 3. 遍历数组, 获取学生信息并打印在控制台 for (int i = 0; i < stus.length; i++) {
Student stu = stus[i]; if (stu != null) {
System.out.println(stu.getId() + "\t\t" + stu.getName() + "\t\t" + stu.getAge() + "\t\t" + stu.getBirthday()); } } } // 添加学生方法 public void addStudent() {
String id; while (true) {
System.out.println("请输入学生id："); id = sc.next(); boolean flag = studentService.isExist(id); if (flag) {
System.out.println("学号已被占用, 请重新输入"); } else {
break; } } Student stu = inputStudentInfo(id); // 3. 将学生对象,传递给StudentService(业务员)中的addStudent方法 boolean result = studentService.addStudent(stu); if (result) {
System.out.println("添加成功"); } else {
System.out.println("添加失败"); } // 4. 根据返回的boolean类型结果, 在控制台打印成功\失败 } public String inputStudentId() {
String Id; while (true) {
System.out.println("请输入学生id："); Id = sc.next(); boolean exist = studentService.isExist(Id); if (!exist) {
System.out.println("您输入的id不存在，请重新输入："); } else {
break; } } return Id; } public Student inputStudentInfo(String id) {
System.out.println("请输入学生姓名："); String name = sc.next(); System.out.println("请输入学生年龄："); String age = sc.next(); System.out.println("请输入学生生日："); String birthday = sc.next(); // 2. 将学生信息封装为学生对象 Student stu = new Student(); stu.setId(id); stu.setName(name); stu.setAge(age); stu.setBirthday(birthday); return stu; } } TeacherController.java
package com.school.edu.info.manager.controller; import com.school.edu.info.manager.damain.Teacher; import com.school.edu.info.manager.service.TeacherService; import java.util.PrimitiveIterator; import java.util.Scanner; public class TeacherController {
private Scanner sc = new Scanner(System.in); private TeacherService teacherService = new TeacherService(); public void start() {
teacherLoop: while (true) {
System.out.println("--------欢迎来到 <老师> 管理系统--------"); System.out.println("请输入您的选择: 1.添加老师 2.删除老师 3.修改老师 4.查看老师 5.退出"); String choice = sc.next(); 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("感谢您使用老师管理系统, 再见!"); break teacherLoop; default: System.out.println("您的输入有误, 请重新输入"); break; } } } 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, 根据id, 删除老师 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, 并打印在控制台 System.out.println("学号\t\t姓名\t\t年龄\t\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" + t.getName() + "\t\t" + t.getAge() + "\t\t" + t.getBirthday()); } } } public void addTeacher() {
String id; while (true) {
// 1. 接收不存在的老师id System.out.println("请输入老师id:"); id = sc.next(); // 2. 判断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继续完成添加操作 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("请输入老师姓名:"); String name = sc.next(); System.out.println("请输入老师年龄:"); String age = sc.next(); System.out.println("请输入老师生日:"); String birthday = sc.next(); Teacher t = new Teacher(); t.setId(id); t.setName(name); t.setAge(age); t.setBirthday(birthday); return t; } } 3. service包
StudentService.java
package com.school.edu.info.manager.service; import com.school.edu.info.manager.damain.Student; import com.school.edu.info.manager.dao.StudentDao; public class StudentService {
// 1.创建StudentDao (库管) private StudentDao studentDao = new StudentDao(); public boolean addStudent(Student stu) {
// 2. 将学生对象, 传递给StudentDao 库管中的addStudent方法 // 3. 将返回的boolean类型结果, 返还给StudentController return studentDao.addStudent(stu); } public boolean isExist(String id) {
Student[] stus = studentDao.findAllStudent(); //假设id不存在 boolean exists = false; // 遍历数组, 获取每一个学生对象, 准备进行判断 for (int i = 0; i < stus.length; i++) {
Student student = stus[i]; if (student != null && student.getId().equals(id)) {
exists = true; break; } } return exists; } public Student[] findAllStudent() {
Student[] allStudent = studentDao.findAllStudent(); boolean flag = false; for (int i = 0; i < allStudent.length; i++) {
Student stu = allStudent[i]; if (stu == null) {
flag = true; break; } } if (flag) {
return allStudent; } else {
return null; } } public void deleteStudentById(String delId) {
studentDao.deleteStudentById(delId); } public void uppDateStudent(String uppdateId, Student newstu) {
studentDao.uppDateStudent(uppdateId,newstu); } } TeacherService.java
package com.school.edu.info.manager.service; import com.school.edu.info.manager.damain.Teacher; import com.school.edu.info.manager.dao.TeacherDao; public class TeacherService {
private TeacherDao teacherDao = new TeacherDao(); public boolean addTeacher(Teacher t) {
return teacherDao.addTeacher(t); } public boolean isExists(String id) {
// 1. 获取库管对象中的数组 Teacher[] teachers = teacherDao.findAllTeacher(); boolean exists = false; // 2. 遍历数组, 取出每一个元素, 进行判断 for (int i = 0; i < teachers.length; i++) {
Teacher teacher = teachers[i]; if(teacher != null && teacher.getId().equals(id)){
exists = true; break; } } return exists; } public Teacher[] findAllTeacher() {
Teacher[] allTeacher = teacherDao.findAllTeacher(); boolean flag = false; for (int i = 0; i < allTeacher.length; i++) {
Teacher t = allTeacher[i]; if(t != null){
flag = true; break; } } if(flag){
return allTeacher; }else{
return null; } } public void deleteTeacherById(String id) {
teacherDao.deleteTeacherById(id); } public void updateTeacher(String id, Teacher newTeacher) {
teacherDao.updateTeacher(id,newTeacher); } } 4. dao包
StudentDao.java
package com.school.edu.info.manager.dao; import com.school.edu.info.manager.damain.Student; public class StudentDao {
// 创建学生对象数组 private static Student[] stus = new Student[5]; public boolean addStudent(Student stu) {
// 添加学生到数组 //定义变量index为-1，假设数组已经全部存满，没有null的元素 int index = 1; //遍历数组取出每一个元素，判断是否是null for (int i = 0; i < stus.length; i++) {
Student student = stus[i]; if (student == null) {
index = i; //如果为null，让index变量记录当前索引位置，并使用break结束循环遍历 break; } } //返回是否添加成功的boolean类型状态 if (index == -1) {
// 装满了 return false; } else {
// 没有装满, 正常添加, 返回true stus[index] = stu; return true; } } public Student[] findAllStudent() {
return stus; } public void deleteStudentById(String delId) {
int index = getIndex(delId); stus[index] = null; } public int getIndex(String id) {
int index = -1; for (int i = 0; i < stus.length; i++) {
Student stu = stus[i]; if (stu != null && stu.getId().equals(id)) {
index = i; break; } } return index; } public void uppDateStudent(String uppdateId, Student newstu) {
int index = getIndex(uppdateId); stus[index] = newstu; } } TeacherDao.java
package com.school.edu.info.manager.dao; import com.school.edu.info.manager.damain.Teacher; public class TeacherDao {
private static Teacher[] teachers = new Teacher[5]; public boolean addTeacher(Teacher t) {
int index = -1; for (int i = 0; i < teachers.length; i++) {
Teacher teacher = teachers[i]; if(teacher == null){
index = i; break; } } if(index == -1){
return false; }else{
teachers[index] = t; return true; } } public Teacher[] findAllTeacher() {
return teachers; } public void deleteTeacherById(String id) {
// 1. 查询id在数组中的索引位置 int index = getIndex(id); // 2. 将该索引位置的元素, 使用null进行替换 teachers[index] = null; } public int getIndex(String id){
int index = -1; for (int i = 0; i < teachers.length; i++) {
Teacher t = teachers[i]; if(t != null && t.getId().equals(id)){
index = i; break; } } return index; } public void updateTeacher(String id, Teacher newTeacher) {
int index = getIndex(id); teachers[index] = newTeacher; } } 5. entry包
InfoManagerEntry.java
package com.school.edu.info.manager.entry; import com.school.edu.info.manager.controller.StudentController; import com.school.edu.info.manager.controller.TeacherController; import java.util.Scanner; public class InfoManagerEntry {
public static void main(String[] args) {
//主菜单搭建 while (true) {
Scanner sc = new Scanner(System.in); System.out.println("--------欢迎来到师生信息管理系统--------"); System.out.println("请输入您的选择: 1.学生管理 2.老师管理 3.退出"); String choice = sc.next(); switch (choice) {
case "1": System.out.println("学生管理"); //开启学生管理系统 StudentController studentcontroller = new StudentController(); studentcontroller.start(); break; case "2": System.out.println("老师管理"); TeacherController teacherController = new TeacherController(); teacherController.start(); break; case "3": System.out.println("感谢您的使用"); System.exit(0); // 退出当前正在运行的JVM虚拟机 break; default: System.out.println("您的输入有误，请重新输入"); break; } } } } tln("学生管理"); //开启学生管理系统 StudentController studentcontroller = new StudentController(); studentcontroller.start(); break; case "2": System.out.println("老师管理"); TeacherController teacherController = new TeacherController(); teacherController.start(); break; case "3": System.out.println("感谢您的使用"); System.exit(0); // 退出当前正在运行的JVM虚拟机 break; default: System.out.println("您的输入有误，请重新输入"); break; } } } } 免责声明：本站所有文章内容,图片，视频等均是来源于用户投稿和互联网及文摘转载整编而成，不代表本站观点，不承担相关法律责任。其著作权各归其原作者或其出版社所有。如发现本站有涉嫌抄袭侵权/违法违规的内容,侵犯到您的权益，请在线联系站长,一经查实,本站将立刻删除。 本文来自网络,若有侵权，请联系删除，如若转载，请注明出处：https://haidsoft.com/142644.html
