学生类的创建
/**
* @document: 学生类，实体类用来封装学生信息
* @Author:SmallG
* @CreateTime:2023/8/1+18:30
*/
public class Student {
private String name; //姓名
private int age; //年龄
private String gender; //性别
private String birth;//生日
public Student() {
}
public Student(String name, int age, String gender, String birth) {
this.name = name;
this.age = age;
this.gender = gender;
this.birth = birth;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getGender() {
return gender;
}
public void setGender(String gender) {
this.gender = gender;
}
public String getBirth() {
return birth;
}
public void setBirth(String birth) {
this.birth = birth;
}
}StudentList类创建
/**
* @Author:SmallG
* @CreateTime:2023/8/1+18:34
*/
public class StudentList {
//声明Student数组，用来保存学生对象
private Student[] students = new Student[5];
private int total = 0;
private int totalStudent;
public Student[] getStudents() {
return students;
}
public void setStudents(Student[] students) {
this.students = students;
}
public int getTotal() {
return total;
}
public void setTotal(int total) {
this.total = total;
}
//初始化students数组
public StudentList() {
}
public StudentList(int totalStudent) {
this.totalStudent = totalStudent;
}
//添加学生方法
public boolean addStudent(Student student) {
//基于total个student.length判断数组是否已满
if (total == students.length) {
return false; //添加失败
} else {
//将student添加到数组中，并调整total的值
students[total] = student;
total++;
return true; //添加成功
}
}
//判断数组是否已满
public boolean isFull() {
if (total == students.length) {
return true; //数组已满
} else {
return false; //数组未满
}
}
//替换学生,用参数stud替换数组中由index指定的对象
public boolean replaceStudent(int index, Student stud) {
if (index >= students.length || index < 0) {
return false; //替换失败
} else {
//students[index] = stud;
return true; //替换成功
}
}
//删除学生,从数组中删除参数为index指定索引位置的学生对象记录
public boolean deleteStudent(int index) {
if (index < 0 || index >= students.length) {
return false; //索引无效，无法删除
} else {
for (int i =index;i<students.length-1;i++){
students[i]=students[i+1];
}
total--;
return true;
}
}
//返回数组中记录的所有学生对象
public void getAllStudent(){
for (int i=0;i<total;i++){
if (!students[i].getName().equals(null)){
System.out.println((i+1)+"\t\t\t"+students[i].getName()+"\t\t"+students[i].getGender()+"\t\t\t"+students[i].getAge()+"\t\t\t"+students[i].getBirth());
}
}
}
//返回参数index指定索引位置的学生对象记录
public Student getStudent(int index){
if (index<0){
return null;
}else if(!students[index].equals("null")){
return students[index];
}else
{
return null;
}
}
}StudentView类创建
/**
* @document: 主模块，负责菜单的显示和处理用户操作
* @Author:SmallG
* @CreateTime:2023/8/1+19:08
*/
public class StudentView {
//创建最大包含5个学生对象的StudentList对象，供以下各成员方法使用
StudentList studentList = new StudentList(5);
//用于读取用户键盘输入
Scanner scanner = new Scanner(System.in);
public static void main(String[] args) {
StudentView studentView = new StudentView();
studentView.enterMainMenu();
}
//显示主菜单，相应用户输入，根据用户操作分别调用其他相应成员的方法
public void enterMainMenu() {
boolean flag1 = true;
while (flag1) {
System.out.println("------------------学生信息管理软件------------------");
System.out.println();
System.out.println(" 1 添 加 学 生 ");
System.out.println(" 2 修 改 学 生 ");
System.out.println(" 3 删 除 学 生 ");
System.out.println(" 4 学 生 列 表 ");
System.out.println(" 5 退 出 ");
System.out.println();
System.out.print(" 请选择(1-5)：");
int num = scanner.nextInt();
switch (num) {
case 1:
addNewStudent();
break;
case 2:
replaceNewStudent();
break;
case 3:
deleteStudent();
break;
case 4:
getStudent();
break;
case 5:
System.out.println("退出成功！");
flag1 = false;
break;
default:
System.out.println("序号输入有误！");
break;
}
}
}
//查看学生列表
public void getStudent() {
System.out.println("---------------------学生列表---------------------");
System.out.println("编号\t\t姓名\t\t性别\t\t年龄\t\t生日\t\t");
studentList.getAllStudent();
System.out.println("-------------------学生列表完成-------------------");
}
//删除学生
public void deleteStudent() {
System.out.println("---------------------删除学生---------------------");
System.out.println("请选择待删除学生编号(-1退出)：");
int num = scanner.nextInt();
if (num == -1) {
System.out.println("退出成功！");
} else {
System.out.println("确认是否删除(Y/N)");
String s = scanner.next();
if ((s.equals("y") || s.equals("Y")) && studentList.deleteStudent(num - 1)) {
System.out.println("---------------------删除完成---------------------");
} else if (s.equals("n") || s.equals("N")) {
System.out.println("---------------------删除取消---------------------");
} else {
System.out.println("输入有误！");
}
}
}
//修改学生
public void replaceNewStudent() {
System.out.println("---------------------修改学生---------------------");
System.out.println("请选择待修改学生编号(-1退出)：");
int num = scanner.nextInt();
if (num > 0) {
System.out.println("姓名(" + studentList.getStudent(num - 1).getName() + ")：");
String name = scanner.next();
if (!name.equals("-2")) {
studentList.getStudent(num - 1).setName(name);
}
System.out.println("性别(" + studentList.getStudent(num - 1).getGender() + ")：");
String gender = scanner.next();
if (!gender.equals("-2")) {
studentList.getStudent(num - 1).setGender(gender);
}
System.out.println("年龄(" + studentList.getStudent(num - 1).getAge() + ")：");
int age = scanner.nextInt();
if (age != -2) {
studentList.getStudent(num - 1).setAge(age);
}
System.out.println("生日(" + studentList.getStudent(num - 1).getBirth() + ")：");
String birth = scanner.next();
if (!birth.equals("-2")) {
studentList.getStudent(num - 1).setGender(birth);
}
} else {
System.out.println("退出成功！");
}
boolean flag = studentList.replaceStudent(num - 1, studentList.getStudent(num - 1));
if (flag) {
System.out.println("---------------------修改完成---------------------");
} else {
System.out.println("---------------------修改失败---------------------");
}
}
//添加学生
public void addNewStudent() {
System.out.println("---------------------添加学生---------------------");
//判断是否已满
if (studentList.isFull()) {
System.out.println("-----------------记录已满，无法添加-----------------");
} else {
//未满
System.out.print("姓名：");
String studentName = scanner.next();
System.out.print("性别：");
String studentGender = scanner.next();
System.out.print("年龄：");
int studentAge = scanner.nextInt();
System.out.print("生日：");
String studentBirth = scanner.next();
//创建Student对象stud,封装输入的学生信息
Student stud = new Student(studentName, studentAge, studentGender, studentBirth);
boolean flag = studentList.addStudent(stud);
if (flag) { //添加成功
System.out.println("---------------------添加成功---------------------");
} else {
System.out.println("-----------------记录已满，无法添加-----------------");
}
}
}
}