这个是java版本的代码版本,已在控制台上完美运行,用的编写软件是idea.希望大家可以参考和交流,我也会慢慢把更完善注释和优化版本发布出来.管理系统里管理了学生和教师,可以根据个人需要只管理一个或者交流发出来

在项目下创建的包有(记得项目里导包和API):

controller包
dao包
domin包
service包
entry包

controller包下内容(客服业务)

controlStudent类

public class controlStudent {
    private  static serviceStudent serviceStudent = new serviceStudent();
    private static Scanner sc = new Scanner(System.in);

    public static void start() {
        Scanner sc = new Scanner(System.in);
        lo:
        while (true) {
            System.out.println("**##$$$$$欢迎进入学生管理系统$$$$$##**");
            System.out.println("************好人一生写代码************");
            System.out.println("1.添加学生");
            System.out.println("2.删除学生");
            System.out.println("3.修改学生");
            System.out.println("4.查看学生");
            System.out.println("5.**退出**");
            System.out.println("请输入您的选择:");

            String chioce = sc.next();//输入选择

            switch (chioce) {
                case "1":
                    addstudent();//增加学生
                    break;
                case "2":
                    deletestudent();//删除学生");
                    break;
                case "3":
                    //修改学生");
                    updatestudent();
                    break;
                case "4":
                    //查看学生");
                   findAllStudent();
                    break;
                case "5":
                    System.out.println("退出");
                    break lo;
                default:
                    System.out.println("你的输入不对,请重新输入");
                    break;
            }
        }

    }

    private static void deletestudent() {
        String delid=inputstudentid();
        serviceStudent.deletestudent(delid);
        System.out.println("删除成功");
    }

    public  static   void updatestudent() {
        //serviceStudent serviceStudent=new serviceStudent();
        //ArrayList<Student> students= serviceStudent.findAllStudent();

        String updateid=inputstudentid();
         Student newstu = inputstudentinfo(updateid);
        serviceStudent.updatestudent(updateid,newstu);
        System.out.println("修改成功");
    }

    public static Student inputstudentinfo(String sid) {
      /*  System.out.println("请输入学号:");
        String sid=sc.next();*/
        System.out.println("请输入学生姓名:");
        String name = sc.next();
        System.out.println("请输入学生年龄:");
        int age = sc.nextInt();
        System.out.println("请输入学生生日:");
        String birthday = sc.next();
        Student stu = new Student(sid, name, age, birthday);
       // Student student=Student(stu.setSid(),stu.setName(),stu.setAge(),stu.setBirthday());
       /* stu.setName(name);
        stu.setAge(age);
        stu.setBirthday(birthday);*/

        return  stu;
    }

    public static void findAllStudent() {
        //serviceStudent serviceStudent=new serviceStudent();
       Student[] students= serviceStudent.findallStudent();

        if (students==null){
            System.out.println("查无学生信息, 请添加后重试");
            return;//直接结束这句
        }//else语句作用,可不写

        System.out.println("学号"+"\t\t"+"姓名"+"\t\t"+"年龄"+"\t\t"+"生日");
        for (int i = 0; i <students.length; i++) {
             Student students1=students[i];
            System.out.println(students1.getSid()+"\t"+students1.getName()+"\t\t"+students1.getAge()+"\t\t"+students1.getBirthday());
        }

    }

    public static void addstudent() {
        serviceStudent serviceStudent = new serviceStudent();
        Scanner sc = new Scanner(System.in);
        String sid;
        while (true) {
            System.out.println("请输入学号:");
            sid = sc.next();

            boolean flag = serviceStudent.isExists(sid);
            if (flag) {
                System.out.println("学号已被占用,请重新输入:");
            } else {
                break;
            }

        }
        System.out.println("请输入姓名:");
        String name = sc.next();
        System.out.println("请输入年龄:");
        int age = sc.nextInt();
        System.out.println("请输入生日:");
        String birthday = sc.next();
        Student stu = new Student(sid, name, age, birthday);


        boolean result = serviceStudent.addStudent(stu);
        if (result) {
            System.out.println("添加成功");
        } /*else {
            System.out.println("添加失败");
        }*/
    }

  public static String inputstudentid( ){
    String sid;
    while (true){
        System.out.println("请输入学生id:");
        sid = sc.next();
        boolean exists=serviceStudent.isExists(sid);
        if (!exists){
            System.out.println("你输入的id不存在,请重新输入:");
        }else {
            break;
        }
    }
    return sid;
}


}

controlTeacher类

public class controlTeacher {
     private static  Scanner sc = new Scanner(System.in);
    public void start() {

        lo:
        while (true) {
            System.out.println("**##$$$$$欢迎进入教师管理系统$$$$$##**");
            System.out.println("************好人一生写代码************");
            System.out.println("1.添加教师");
            System.out.println("2.删除教师");
            System.out.println("3.修改教师");
            System.out.println("4.查看教师");
            System.out.println("5.**退出**");
            System.out.println("请输入您的选择:");

            String chioce = sc.next();//输入选择

            switch (chioce) {
                case "1":
                    addteacher();//增加教师
                    break;
                case "2":
                    deleteteacher();//删除教师");
                    break;
                case "3":
                    //修改教师");
                    updateteacher();
                    break;
                case "4":
                    //查看教师");
                   findteacher();
                    break;
                case "5":
                    System.out.println("退出");
                    break lo;
                default:
                    System.out.println("你的输入不对,请重新输入");
                    break;
            }
        }
    }

    public void deleteteacher() {
        String delsid=inputstudentid();
        serviceTeacher.deleteteacher(delsid);
        System.out.println("删除成功");

    }

    public void updateteacher() {
       String updatesid=inputstudentid();
       Teacher newtea=inputteacherinfo(updatesid);
       serviceTeacher.updateteacher(updatesid,newtea);
        System.out.println("更新成功");
    }


    private Teacher inputteacherinfo(String sid) {
        System.out.println("请输入姓名:");
        String name = sc.next();
        System.out.println("请输入年龄:");
        int age = sc.nextInt();
        System.out.println("请输入生日:");
        String birthday = sc.next();
        Teacher tea  = new Teacher(sid, name, age, birthday);
        return tea;
    }
    public static String inputstudentid( ){
        String sid;
        while (true){
            System.out.println("请输入教师工号:");
            sid = sc.next();
            boolean exists=serviceTeacher.isExists(sid);
            if (!exists){
                System.out.println("你输入的id不存在,请重新输入:");
            }else {
                break;
            }
        }
        return sid;
    }


    public void findteacher() {查看要用一个数组接收信息
     Teacher[] teachers= serviceTeacher.findteacher();
       if (teachers==null){       //数组为空判定
           System.out.println("没有教师信息,请输入后重试");
           return;
       }                          //不为空输出业务层接收的数组,并打印
        System.out.println("工号"+"\t\t"+"姓名"+"\t\t"+"年龄"+"\t\t"+"生日");
        for (int i = 0; i < teachers.length; i++) {
            Teacher teacher=teachers[i];
            System.out.println(teacher.getSid()+"\t"+teacher.getName()+"\t\t"+teacher.getAge()+"\t\t"+teacher.getBirthday());
        }
    }

    public void addteacher() {
        serviceTeacher serviceStudent = new serviceTeacher();
        Scanner sc = new Scanner(System.in);
        String sid;
        while (true) {
            System.out.println("请输入工号:");
            sid = sc.next();

            boolean flag = serviceStudent.isExists(sid);
            if (flag) {
                System.out.println("工号已被占用,请重新输入:");
            } else {
                break;
            }
        }

        System.out.println("请输入姓名:");
        String name = sc.next();
        System.out.println("请输入年龄:");
        int age = sc.nextInt();
        System.out.println("请输入生日:");
        String birthday = sc.next();
        Teacher tea  = new Teacher(sid, name, age, birthday);

        boolean result = serviceTeacher.addteacher(tea);
        if (result) {
            System.out.println("添加成功");
        }
    }


}

dao包下内容(库管业务)

daoperson类

public abstract class daoperson {
    /*new abstract daoStudent(ArrayList<Student> list);
    public int getindex(String sid ) {
        int index=-1;                        //客服的添加判定
        for (int i = 0; i <list.size(); i++) {
            Student student= list.get(i);
            if (student!=null&&sid.equals(student.getSid())){
                index=i;
                break;
            }
        }
        return index;
    }*/
}

daoStudent类

public class daoStudent extends daoperson {
   public  ArrayList<Student> list = new ArrayList<>();

//添加学生信息
    public boolean addstudent(Student stu) {
            list.add(stu);
            return true;
       }

//查看学生信息
    public Student[] findAllStudent() {
        Student[] stu=new Student[list.size()];
        for (int i = 0; i < stu.length; i++) {
           stu[i]=list.get(i);
        }
        return stu;
    }
//更新学生信息
    public void updatestudent(String updateid,Student newstu) {
        int index=getindex(updateid);
       list.set(index,newstu);

    }
//遍历索引
    public int getindex(String sid ) {
        int index=-1;                        //客服的添加判定
        for (int i = 0; i <list.size(); i++) {
            Student student= list.get(i);
            if (student!=null&&sid.equals(student.getSid())){
                index=i;
                break;
            }
        }
        return index;
    }

    public void deletustudent(String delid) {//方法里面带参数的要加
        int index=getindex(delid);
        list.remove(index);
    }
//删除学生信息
  /*  public void deleteStudent(String delid, Student student) {
        int index =getindex(delid);
        list.remove(index);
    }*/


}

daoTeacher类

public class daoTeacher extends daoperson {
    private static ArrayList<Teacher> list=new ArrayList<>();


    public static Teacher[] findteacher() {
        Teacher[] tea=new Teacher[list.size()];      //用数组接受集合,并赋值给数组
        for (int i = 0; i < tea.length; i++) {
            tea[i]=list.get(i);
        }
        return  tea;
    }

    public boolean addteacher(Teacher tea) {
        list.add(tea);
        return true;
    }


    public void updateteacher(String updatesid, Teacher newtea) {
        int index=getindex(updatesid);
       list.set(index,newtea);
    }
    public int getindex(String sid){       //遍历索引,传入学号
        int index=-1;
        for (int i = 0; i < list.size(); i++) {
            Teacher teachers=list.get(i);
            if (teachers!=null&&sid.equals(teachers.getSid())){
                index=i;
                break;
            }
        }
       return index;
    }

    public void deleteteacher(String delsid) {
      int index=getindex(delsid);
        list.remove(index);
    }
}

domin包下内容(定义成员变量)

person类

public class person {
    private  String sid;
    private  String name;
    private int age;
    private  String birthday;
    public person(){}

    public person(String sid, String name, int age, String birthday){
        this.sid=sid;
        this.name=name;
        this.age=age;
        this.birthday=birthday;
    }
    public void setSid(){
        this.sid=sid;
    }
    public String getSid(){
        return sid;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getName() {
        return name;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public int getAge() {
        return age;
    }

    public void setBirthday(String birthday) {
        this.birthday = birthday;
    }

    public String getBirthday() {
        return birthday;
    }

}

Student类

public class Student extends person{

    public Student(String sid, String name, int age, String birthday) {
        super(sid, name, age, birthday);
    }
}
   

Teacher类

public class Teacher extends person {
    public Teacher(String sid, String name, int age, String birthday) {
        super(sid, name, age, birthday);
    }
   
    }

service包下内容(业务员业务)

serviceStudent类

public class serviceStudent {
    private static daoStudent daoStudent=new daoStudent();



    public boolean addStudent(Student student){
      return daoStudent.addstudent(student);

  }


    public boolean isExists(String sid) {//判断学号是否存在
      Student[] stu=daoStudent.findAllStudent();

        boolean exists = false;
        for (int i = 0; i < stu.length; i++) {
            Student stu1 =stu[i];
            if(stu1 != null && sid.equals(stu1.getSid())){
                exists = true;
                break;
            }
        }
        return exists;
    }

    /*public Student[] lookstudent() {
      //  Student[] allStudent= daoStudent.findAllStudent().toArray(new Student[0]);

        //return allStudent;
    }
*/
    public void updatestudent(String updateid, Student newstu) {
        daoStudent.updatestudent(updateid,newstu);
    }

    public Student[] findallStudent() {
        Student[] allStudent=daoStudent.findAllStudent();
        boolean flag=false;
        for (int i = 0; i < allStudent.length; i++) {
            Student student=allStudent[i];
            if(student!= null){
                flag = true;
                break;
            }
        }
        if (flag){

            return allStudent;
        }
        return null;
    }

    public void deletestudent(String delid) {
        daoStudent.deletustudent(delid);
    }

     /* ArrayList<Student> alllist =daoStudent.findAllStudent();
     boolean flag = false;
     for (int i = 0; i < alllist.size(); i++) {
         Student stu = alllist.get(i);
         if(stu != null){
             flag = true;
             break;
         }
     }
     if(flag){
         // 有信息
         return alllist;
     }else{
         // 没有信息
         return null;
     }*/
      }

serviceTeacher类

public class serviceTeacher {
private static daoTeacher daoTeacher= new daoTeacher();

    public static boolean addteacher(Teacher Tea){
        return daoTeacher.addteacher(Tea);
    }

    public static Teacher[] findteacher() {
        Teacher[] allteacher=daoTeacher.findteacher(); //接收数组并判定数组;

        boolean flag=false;
        for (int i = 0; i < allteacher.length; i++) {
            Teacher teachers=allteacher[i];           //boolean一个参数为false,遍历数组不为空为true
            if (teachers!=null){
                flag=true;
                break;
            }
        }
        if (flag){                   //不为空true返回接收的数组, 为空false数组为null;
        return allteacher;
        }
        return  null;
    }



    public static boolean isExists(String sid) {
        Teacher[] tea=daoTeacher.findteacher();

        boolean exists = false;
        for (int i = 0; i < tea.length; i++) {
            Teacher tea1 =tea[i];
            if(tea1!= null && sid.equals(tea1.getSid())){
                exists = true;
                break;
            }
        }
        return exists;
    }

    public static void updateteacher(String updatesid, Teacher newtea) {
        daoTeacher.updateteacher(updatesid,newtea);
    }

    public static void deleteteacher(String delsid) {
        daoTeacher.deleteteacher(delsid);
    }
}

entry包(里面是主方法main–运行类)

infomanagerentry类

public class infomanagerentry {
    private  static Scanner sc = new Scanner(System.in);
    public static void main(String[] args) {

        while (true) {

            System.out.println("*******欢迎来到王者荣耀管理系统*******");
            System.out.println("1.学生管理系统**2.老师管理系统**3.退出");
            String chioce = sc.next();
            switch (chioce) {
                case "1":
                    System.out.println("学生管理系统");
                    controlStudent studentController = new controlStudent();
                    studentController.start();
                    break;
                case "2":
                    System.out.println("教师管理系统");
                    controlTeacher controlTeacher=new controlTeacher();
                    controlTeacher.start();
                    break;
                case "3":
                    System.out.println("退出王者系统");
                    System.exit(0);
            }
        }
    }
}

实现效果

找不到代码了,就跟简化的这个一样
插入数据

查看学生

修改学生

删除学生

退出