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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