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:
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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:
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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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原文链接：https://blog.csdn.net/weixin_46739027/article/details/120273515
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