一段时间没有更新，为了装作自己正在努力学习随便放点东西
2022.3.9更新：
添加了继承的使用
简易控制台版学生管理系统
Student.java
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| package test;
public class Student {
private String id;
private String name;
private String age;
public Student() {
}
public Student(String id, String name, String age) {
this.id = id;
this.name = name;
this.age = age;
}
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;
}
}
|
StudentsManager.java
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| package test;
import java.util.ArrayList;
import java.util.Scanner;
public class StudentsManager {
static Scanner scan = new Scanner(System.in);
public static void userUI() {
System.out.println("--------欢迎使用学生管理系统--------");
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.展示所有学生 |");
System.out.println("| 5.退出系统 |");
System.out.println("---------------------------------");
System.out.print("请输入你的选择：");
}
public static boolean choose(ArrayList<Student> students, boolean OK) {
String choose = scan.nextLine();
switch (choose) {
case "1":
addStudent(students);
break;
case "2":
setStudent(students);
break;
case "3":
delStudent(students);
break;
case "4":
allStudent(students);
break;
case "5":
OK = false;
break;
default:
System.out.println("没有该选项！");
}
return OK;
}
public static void addStudent(ArrayList<Student> students) {
do {
System.out.println("请输入学号：");
String id = scan.nextLine();
id = isTure(students, id);
System.out.println("请输入姓名：");
String name = scan.nextLine();
System.out.println("请输入年龄：");
String age = scan.nextLine();
if (id.length() == 0 || name.length() == 0 || age.length() == 0) {
System.out.println("有数据未输入！");
return;
} else {
Student student = new Student(id, name, age);
students.add(student);
System.out.println("是否继续录入（y/n）");
}
} while (scan.nextLine().equals("y"));
}
private static String isTure(ArrayList<Student> students, String id) {
Student student;
for (int i = 0; i < students.size(); i++) {
student = students.get(i);
while (student.getId().equals(id)) {
System.out.println("学号重复！请重新输入：");
id = scan.nextLine();
}
}
return id;
}
public static void setStudent(ArrayList<Student> students) {
System.out.println("请输入要修改的学生学号：");
String id = scan.nextLine();
Student student;
for (int i = 0; i < students.size(); i++) {
student = students.get(i);
if (student.getId().equals(id)) {
System.out.println("请输入新学号：");
String new_id = scan.nextLine();
id = isTure(students, new_id);
System.out.println("请输入新姓名：");
String name = scan.nextLine();
System.out.println("请输入新年龄：");
String age = scan.nextLine();
student.setId(new_id);
student.setName(name);
student.setAge(age);
students.set(i, student);
return;
}
}
System.out.println("未找到该学生学号，请检查是否正确！");
}
public static void delStudent(ArrayList<Student> students) {
System.out.println("请输入要删除的学生学号：");
String id = scan.nextLine();
Student student;
for (int i = 0; i < students.size(); i++) {
student = students.get(i);
if (student.getId().equals(id)) {
students.remove(i);
System.out.println("删除成功！");
return;
}
}
System.out.println("未找到该学生学号，请检查是否正确！");
}
public static void allStudent(ArrayList<Student> students) {
Student student;
System.out.println("学号\t姓名\t\t年龄");
if (students.size() == 0) {
System.out.println("没有学生信息！");
return;
}
for (int i = 0; i < students.size(); i++) {
student = students.get(i);
System.out.println(student.getId() + "\t" + student.getName() + "\t" + student.getAge() + "\t");
}
}
}
|
Manager.java
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| import java.util.ArrayList;
public class Manager extends StudentsManager{
static boolean OK = true;
public static void main(String[] args) {
ArrayList<Student> students = new ArrayList<>();
while (OK){
userUI();
OK = choose(students,OK);
}
System.out.println("感谢使用！");
}
}
|