学生信息管理需求
- 添加学生信息
- 根据学号删除学生信息
- 根据学号修改学生信息
- 查看学生信息
本代码采用面向过程思想
创建学生类
package com.liang.domain;
public class Student {
private String sid; //学号
private String name; //姓名
private int age; //年龄
private String birthday; //生日
public Student() {
}
public Student(String sid, String name, int age, String birthday) {
this.sid = sid;
this.name = name;
this.age = age;
this.birthday = birthday;
}
public String getSid() {
return sid;
}
public void setSid(String sid) {
this.sid = sid;
}
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 getBirthday() {
return birthday;
}
public void setBirthday(String birthday) {
this.birthday = birthday;
}
}
创建StudentManager类
package com.liang.Test;
import com.liang.domain.Student;
import java.util.ArrayList;
import java.util.Scanner;
public class StudentManager {
public static void main(String[] args) {
Scanner sc=new Scanner(System.in);
//创建容器对象
ArrayList<Student> list=new ArrayList<>();
lo:while(true){
//搭建主界面菜单
System.out.println("----------------欢迎来到学生管理系统--------------");
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("请输入功能编号:");
String choice = sc.next();
switch(choice){
case "1":
addStudent(list);
break;
case "2":
deleteStudent(list);
break;
case "3":
updateStudent(list);
break;
case "4":
queryStudents(list);
break;
case "5":
System.out.println("感谢使用本操作系统");
break lo;
default:
System.out.println("您输入的指令有误");
break;
}
}
}
public static void updateStudent(ArrayList<Student> list) {
System.out.println("请输入修改的学号");
Scanner sc=new Scanner(System.in);
String id = sc.next();
int index = getIndex(list, id);
if(index==-1){
System.out.println("查无信息,请重新输入");
}else{
System.out.println("请输入新的学生姓名");
String name=sc.next();
System.out.println("请输入新的学生年龄");
int age=sc.nextInt();
System.out.println("请输入新的学生生日");
String birthday=sc.next();
Student stu=new Student(id,name,age,birthday);
list.set(index,stu);
System.out.println("修改成功");
}
}
public static void deleteStudent(ArrayList<Student> list) {
System.out.println("请输入您要删除的学号");
Scanner sc=new Scanner(System.in);
String next = sc.next();
int index = getIndex(list, next);
if(index==-1){
System.out.println("查无信息,请重新输入");
}else{
list.remove(index);
System.out.println("删除成功");
}
}
//查询索引
public static int getIndex(ArrayList<Student> list,String sid){
int index=-1;
for (int i = 0; i < list.size(); i++) {
Student student = list.get(i);
String sid1 = student.getSid();
if(sid1.equals(sid)){
index=i;
}
}
return index;
}
//添加学生方法
public static void addStudent(ArrayList<Student> list) {
Scanner sc=new Scanner(System.in);
String sid;
while(true){
System.out.println("请输入学号");
sid=sc.next();
int index = getIndex(list, sid);
if(index==-1){
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);
list.add(stu);
}
//查看信息
public static void queryStudents(ArrayList<Student> list) {
if(list.size()==0){
System.out.println("集合不存在数据");
return;
}
else{
System.out.println("学号\t姓名\t年龄\t生日");
for (int i = 0; i < list.size(); i++) {
Student stu=list.get(i);
System.out.println(stu.getSid()+"\t"+stu.getName()+"\t"+stu.getAge()+"\t"+stu.getBirthday());
}
}
}
}