java基础巩固综合训练(学生信息管理系统增、删、查、改)

蔚落 2023-05-30 14:58 10阅读 0赞

*  这个系统设对初学者用处蛮大的，如果初学者正好是学到了面向对象，只要这个题能看懂做出来，就相当于学的不错。然后有不懂的可以在下方评论，我会为你们一一解答。
 *

package studentManage01.studentManage;
    /*
            学生类
    * */
    public class Student {
        
        private String name;
        private String age;
        private String id;
        private String address;
    
        public Student() {
        
        }
    
        public Student(String name, String age, String id, String address) {
        
            this.name = name;
            this.age = age;
            this.id = id;
            this.address = address;//地址
        }
    
        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 getAddress() {
        
            return address;
        }
    
        public void setAddress(String address) {
        
            this.address = address;
        }
    }

1.  实现类

package studentManage01.studentManage;
    
    import java.util.ArrayList;
    import java.util.Scanner;
    
    /*
            测试类
    * */
    public class studentInfoTest {
        
        public static void main(String[] args) {
        
            ArrayList<Student> arr = new ArrayList<>();
            Scanner sc = new Scanner(System.in);
            int i1 = 0;//计数
            while (true) {
        
                i1++;
                System.out.println("--------学生信息管理系统--------");
                System.out.println("1.增加学生信息");
                System.out.println("2.删除学生信息");
                System.out.println("3.修改学生信息");
                System.out.println("4.查看所有学生信息");
                System.out.println("5.退出");
                System.out.println("请输入选项");
                int i = sc.nextInt();
                switch (i) {
        
                    case 1:
                        //System.out.println("增加学生信息");
                        zengjia(arr);
                        break;
                    case 2:
                        //System.out.println("删除学生信息");
                        shanchu(arr);
                        break;
                    case 3:
                        //System.out.println("修改学生信息");
                        xiugai(arr);
                        break;
                    case 4:
                        //System.out.println("查看学生信息");
                        chakan(arr);
                        break;
                    case 5:
                        System.out.println("谢谢使用");
                        return;
                    default:
                        if (i1 == 1) {
        
                            System.out.println("你输入错误,请重新运行输入");
                            return;
                        } else {
        
                            System.out.println("客官不可以这样,请重新选着");
                        }
    
                }
            }
        }
    
        //增加学生信息
        public static void zengjia(ArrayList<Student> arr) {
        
            Scanner sc = new Scanner(System.in);
            String id;
            while (true) {
        
                System.out.println("请输入要增加的学生学号");
                 id = sc.next();
                boolean b = judgs(arr, id);
                if (b) {
        
                    System.out.println("增加的学生已经存在,请重新输入");
                } else{
        
                    break;
                }
            }
            /*for (int i = 0; i < arr.size(); i++) {
                Student s = arr.get(i);
                if(s.getId().equals(id)){
                    System.out.println("增加的学生已经存在,请重新选着");
                    return;
                }
            }*/
            System.out.println("请输入要增加的学生姓名");
            String name = sc.next();
            System.out.println("请输入要增加的学生年龄");
            String age = sc.next();
            System.out.println("请输入你要增加的学生地址");
            String address = sc.next();
            Student s = new Student();
            s.setId(id);
            s.setName(name);
            s.setAge(age);
            s.setAddress(address);
            arr.add(s);
            System.out.println("录入成功");
    
        }
    
        //查看学生信息
        public static void chakan(ArrayList<Student> arr) {
        
            if (arr.size() == 0) {
        
                System.out.println("无学生信息,请先添加再查看");
                return;
            }
            System.out.println("学号:" + "\t" + "姓名:" + "\t" + "年龄:" + "\t" + "地址:");
            for (int i = 0; i < arr.size(); i++) {
        
                Student s = arr.get(i);
                System.out.println(s.getId() + "\t" + s.getName() + "\t\t" + s.getAge() + "\t\t" + s.getAddress());
            }
        }
    
        //删除学生信息
        public static void shanchu(ArrayList<Student> arr) {
        
            //Student stu = new Student();
            if (arr.size() == 0) {
        
                System.out.println("没有添加学生信息,请先添加再删除");
                return;
            }
            Scanner sc = new Scanner(System.in);
            System.out.println("请输入要删除的学生学号");
            String id = sc.next();
            for (int i = 0; i < arr.size(); i++) {
        
                Student s = arr.get(i);
                if (s.getId().equals(id)) {
        
                    arr.remove(i);
                    return;
                }
            }
            System.out.println("删除失败,没有该学号");
        }
    
        //修改学生的信息
        public static void xiugai(ArrayList<Student> arr) {
        
            Scanner sc = new Scanner(System.in);
            Student stu = new Student();
            if(arr.size()==0){
        
                System.out.println("先录入在修改");
            }
            System.out.println("请输入要修改的学生学号");
            String id = sc.next();
            for (int i = 0; i < arr.size(); i++) {
        
                Student s = arr.get(i);
                if(s.getId().equals(id)){
        
                    System.out.println("请输入要修改的学生姓名");
                    String name = sc.next();
                    System.out.println("请输入要修改的学生年龄");
                    String age = sc.next();
                    System.out.println("请输入要修改的学生地址");
                    String address = sc.next();
                    stu.setId(id);
                    stu.setName(name);
                    stu.setAge(age);
                    stu.setAddress(address);
                    arr.set(i,stu);
                    return ;
                }
            }
            System.out.println("修改失败");
        }
        //判断学生的id是否重复
        public static boolean judgs(ArrayList<Student> arr ,String sid){
        
            boolean b = false;
            for (int i = 0; i < arr.size(); i++) {
        
                Student s = arr.get(i);
                if(s.getId().equals(sid)){
        
                   b  = true;
                   break;
                }
            }
            return b;
        }
    }