Java实现简单学生信息管理系统
最近在学习Java，所以写了个学生信息管理系统，话不多说，上代码。
Student.java:
package com.mumu;
public class Student { //定义学生类
private String name;
private String age;
private String id;
private String room_num;
private int math;
private int english;
private int physic;
public Student() {//无参构造方法
}
public Student(String name, String age, String id, String room_num, int math, int english, int physic) {
this.name = name;
this.age = age;
this.id = id;
this.room_num = room_num;
this.math = math;
this.english = english;
this.physic = physic;
}
//Alt+ INSERT键，可自动生成构造方法
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 getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getRoom_num() {
return room_num;
}
public void setRoom_num(String room_num) {
this.room_num = room_num;
}
public int getMath() {
return math;
}
public int getEnglish() {
return english;
}
public int getPhysic() {
return physic;
}
public void setMath(int math) {
this.math = math;
}
public void setEnglish(int english) {
this.english = english;
}
public void setPhysic(int physic) {
this.physic = physic;
}
}
StudentManager .java:
package com.mumu;
import java.util.ArrayList;
import java.util.Scanner;
public class StudentManager {
public static void main(String[] args) {
ArrayList<Student> array=new ArrayList<>();
menu(array);
}
public static void menu(ArrayList<Student> array)//菜单
{
while(true)
{
System.out.println("^^^^^^^^welcom to my System^^^^^^^^");
System.out.println("please input your choice");
System.out.println("1.add students' information");
System.out.println("2.remove students' information");
System.out.println("3.revise students' information");
System.out.println("4.look over students' information");
System.out.println("5.find students' information");
System.out.println("6.quit the system");
Scanner sc=new Scanner(System.in);
String choice =sc.nextLine();
switch(choice)
{
case "1":
adding(array);
break;
case "2":
removing(array);
break;
case "3":
revising(array);
break;
case "4":
look_over(array);
break;
case "5":
serching(array);
case "6":
quiting();
break;
default:
System.out.println("error!");
System.exit(0);
}
}
}
public static void adding(ArrayList<Student> array)//添加学生信息
{//录入的学生数据录入给成员变量
System.out.println("please input student's id");
Scanner sc=new Scanner(System.in);
String stu_num=sc.nextLine();
if(is_used(array,stu_num)==false)
{
System.out.println("please input student's name");
String stu_name=sc.nextLine();
System.out.println("please input student's age");
String stu_age=sc.nextLine();
System.out.println("please input student's room number");
String stu_addr=sc.nextLine();
System.out.println("do you want to add student's grade?yes/no");
//创建学生对象
Student st=new Student();
st.setAge(stu_age);
st.setId(stu_num);
st.setName(stu_name);
st.setRoom_num(stu_addr);
//添加学生成绩
String cho=sc.nextLine();
if(cho=="yes")
{
System.out.println("please input student's math grade");
int stu_math=sc.nextInt();
System.out.println("please input student's english grade");
int stu_english= sc.nextInt();
System.out.println("please input student's physic grade");
int stu_physic= sc.nextInt();
st.setMath(stu_math);
st.setEnglish(stu_english);
st.setPhysic(stu_physic);
}
//将学生对象添加到集合中
array.add(st);
System.out.println("add successfully");
}
else
{
System.out.println("you are already input information of this student");
}
}
public static void removing(ArrayList<Student> array)//删除学生信息
{
Scanner sc=new Scanner(System.in);
System.out.println("please input student's number");
String stu_num=sc.nextLine();
for(int i=0;i<array.size();i++)
{
Student st=array.get(i);
if(st.getId().equals(stu_num))
{
array.remove(i);
break;
}
else
{
System.out.println("there is no information of that student");
}
}
System.out.println("remove successfully");
}
public static void revising(ArrayList<Student> array)//修改学生信息
{
Scanner sc=new Scanner(System.in);
System.out.println("please input stubent's id");
String stu_num=sc.nextLine();
System.out.println("please input student's new name");
String stu_name=sc.nextLine();
System.out.println("please input student's new id");
String stu_id=sc.nextLine();
System.out.println("please input student's new age");
String stu_age=sc.nextLine();
System.out.println("please input student's new room_number");
String stu_add=sc.nextLine();
System.out.println("do you want to revise student's grade?yes/no");
//创建学生对象
Student st1=new Student();
st1.setRoom_num(stu_add);
st1.setName(stu_name);
st1.setId(stu_id);
st1.setAge(stu_age);
String cho= sc.nextLine();
if(cho=="yes")
{
System.out.println("please input student's new math grade");
int stu_math=sc.nextInt();
System.out.println("please input student's new english grade");
int stu_english=sc.nextInt();
System.out.println("please input student's new physic grade");
int stu_physic=sc.nextInt();
st1.setEnglish(stu_english);
st1.setMath(stu_math);
st1.setPhysic(stu_physic);
}
for(int i=0;i< array.size();i++)
{
Student st2=array.get(i);
if(st2.getId().equals(stu_num))//判断输入的学号是否在array里面
{
array.set(i,st1);
break;
}
else
{
System.out.println("there is no information of that student");
}
}
System.out.println("revise successfully");
}
public static void look_over(ArrayList<Student> array)//查看所有学生信息
{
if(array.size()==0)//先判断集合是否为空
{
System.out.println("there is no information,please input information firstly");
}
else
{
System.out.println("number\tname\tage\troom_number\tmath_grade\tenglish_grade\tphysic_grade");
for(int i=0;i<array.size();i++)
{
Student st=array.get(i);
System.out.println(st.getId()+"\t"+st.getName()+"\t"+st.getAge()+"\t"+st.getRoom_num()+"\t"
+st.getMath()+"\t"+st.getEnglish()+"\t"+st.getPhysic());
}
}
}
public static void quiting() //退出系统
{
System.exit(0);
}
public static boolean is_used(ArrayList<Student> array,String sid)//判断学号是否重复
{
boolean temp=false;
for(int i=0;i< array.size();i++)
{
Student st=array.get(i);
if(st.getId().equals(sid))
{
temp=true;
break;
}
}
return temp;
}
public static void serching(ArrayList<Student> array)//通过学号查找
{
System.out.println("please input id of the student you want to find");
Scanner sc=new Scanner(System.in);
String stu_num=sc.nextLine();
for(int i=0;i< array.size();i++)
{
Student st= array.get(i);
if(st.getId().equals(stu_num))
{
System.out.println(st.getId()+"\t"+st.getName()+"\t"+st.getAge()+"\t"+st.getRoom_num()+"\t"
+st.getMath()+"\t"+st.getEnglish()+"\t"+st.getPhysic());
}
else
{
System.out.println("there is no information of that student");
}
}
}
}
代码是用IDEA写的，因为是初学者，功能相对简单，如有问题欢迎指正哦。
更多学习资料请关注专题《管理系统开发》。
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