Java实现简单学生信息管理系统 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 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.findstudents' 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 newid"); 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"); }}}}

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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