如何使用Java实现学生信息管理系统

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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 array=new ArrayList<>();    menu(array);    }    public static void menu(ArrayList 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 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 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)//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 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,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 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");          }      }  }}

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