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。
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