学生管理系统

//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by FernFlower decompiler)
//

public class user {
    private String id;
    private String password;
    private String idcard;
    private String phone;

    public user() {
    }

    public user(String id, String password, String idcard, String phone) {
        this.id = id;
        this.password = password;
        this.idcard = idcard;
        this.phone = phone;
    }

    public String getId() {
        return this.id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getPassword() {
        return this.password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getIdcard() {
        return this.idcard;
    }

    public void setIdcard(String idcard) {
        this.idcard = idcard;
    }

    public String getPhone() {
        return this.phone;
    }

    public void setPhone(String phone) {
        this.phone = phone;
    }
}
//这个是一个类

//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by FernFlower decompiler)
//

import java.util.ArrayList;
import java.util.Random;

public class test {
    public test() {
    }

    public static void main(String[] args) {
        Random r = new Random();
        ArrayList<Character> list = new ArrayList();

        for(int i = 0; i < 26; ++i) {
            list.add((char)(97 + i));
            list.add((char)(65 + i));
        }

        StringBuilder sb = new StringBuilder();

        int number;
        int index;
        for(number = 0; number < 4; ++number) {
            int index = r.nextInt(26);
            index = (Character)list.get(index);
            sb.append((char)index);
        }

        number = r.nextInt(10);
        sb.append(number);
        char[] arr = sb.toString().toCharArray();
        index = r.nextInt(5);
        char temp = arr[4];
        arr[4] = arr[index];
        arr[index] = temp;
        System.out.println(arr);
    }
}
//这个是第二个

//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by FernFlower decompiler)
//

import java.util.ArrayList;
import java.util.Scanner;

public class students {
    public students() {
    }

    public static void studentstart() {
        ArrayList<student> list = new ArrayList();

        while(true) {
            while(true) {
                System.out.println("**************欢迎来到学生管理系统********");
                System.out.println("            1.添加学生");
                System.out.println("            2.删除学生");
                System.out.println("            3.修改学生");
                System.out.println("            4.查询学生");
                System.out.println("            5.退出");
                System.out.println("请输入你的选择：");
                Scanner sc = new Scanner(System.in);
                int choose = sc.nextInt();
                switch (choose) {
                    case 1:
                        System.out.println("添加学生");
                        add(list);
                        break;
                    case 2:
                        System.out.println("删除学生");
                        delete(list);
                        break;
                    case 3:
                        System.out.println("修改学生");
                        xiugai(list);
                        break;
                    case 4:
                        System.out.println("查询学生");
                        chaxun(list);
                        break;
                    case 5:
                        System.exit(0);
                }
            }
        }
    }

    public static void add(ArrayList<student> list) {
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入学生的姓名：");
        String name = sc.next();
        System.out.println("请输入学生的id：");
        String id = sc.next();
        System.out.println("请输入学生的年龄：");
        int age = sc.nextInt();
        System.out.println("请输入学生的家庭住址：");
        String address = sc.next();
        student s = new student(name, age, id, address);
        list.add(s);
        System.out.println("添加成功");
    }

    public static void delete(ArrayList<student> list) {
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入你要删除的id：");
        String id = sc.next();
        int index = -1;

        for(int i = 0; i < list.size(); ++i) {
            student s = (student)list.get(i);
            if (id.equals(s.getId())) {
                index = i;
            }
        }

        if (index == -1) {
            System.out.println("id不存在");
        } else {
            list.remove(index);
            System.out.println(id + "已删除");
        }
    }

    public static void chaxun(ArrayList<student> list) {
        if (list.size() == 0) {
            System.out.println("当前无学生信息，请添加后在查询");
        } else {
            System.out.println("id\t     姓名\t    年龄 \t  家庭住址\t");

            for(int i = 0; i < list.size(); ++i) {
                student s = (student)list.get(i);
                System.out.println(s.getId() + "  " + s.getName() + "   " + s.getAge() + "   " + s.getAdress());
            }

        }
    }

    public static void xiugai(ArrayList<student> list) {
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入你要修改的id：");
        String id = sc.next();
        int index = -1;

        for(int i = 0; i < list.size(); ++i) {
            student s = (student)list.get(i);
            if (id.equals(s.getId())) {
                index = i;
            }
        }

        if (index == -1) {
            System.out.println("该id不存在");
        } else {
            student s = (student)list.get(index);
            System.out.println("请输入要修改学生的姓名");
            String aname = sc.next();
            s.setName(aname);
            System.out.println("请输入要修改学生的id");
            String aid = sc.next();
            s.setId(aid);
            System.out.println("请输入要修改学生的年龄");
            int aage = sc.nextInt();
            s.setAge(aage);
            System.out.println("请输入要修改学生的家庭住址");
            String aaddress = sc.next();
            s.setAdress(aaddress);
            System.out.println("修改成功");
        }
    }
}
//这个是第三个

//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by FernFlower decompiler)
//

public class student {
    private String name;
    private int age;
    private String id;
    private String adress;

    public student() {
    }

    public student(String name, int age, String id, String adress) {
        this.name = name;
        this.age = age;
        this.id = id;
        this.adress = adress;
    }

    public String getName() {
        return this.name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return this.age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public String getId() {
        return this.id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getAdress() {
        return this.adress;
    }

    public void setAdress(String adress) {
        this.adress = adress;
    }
}
//这个是第四个

//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by FernFlower decompiler)
//

import java.util.ArrayList;
import java.util.Random;
import java.util.Scanner;

public class denglu {
    public denglu() {
    }

    public static void main(String[] args) {
        ArrayList<user> list = new ArrayList();

        while(true) {
            while(true) {
                System.out.println("欢迎来到学生管理系统");
                System.out.println("请选择操作 ： 1.登录 2.注册 3.忘记密码 4.退出");
                Scanner sc = new Scanner(System.in);
                int choose = sc.nextInt();
                switch (choose) {
                    case 1:
                        denglu(list);
                        break;
                    case 2:
                        zhuce(list);
                        break;
                    case 3:
                        forget(list);
                        break;
                    case 4:
                        System.exit(0);
                }
            }
        }
    }

    public static void denglu(ArrayList<user> list) {
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入用户名");
        String id = sc.next();
        boolean flag1 = contains(list, id);
        if (flag1) {
            System.out.println("用户名不存在，请先注册");
        } else {
            System.out.println("请输入密码");
            String password = sc.next();
            String sb = produceY();
            System.out.println("请输入验证码");

            while(true) {
                String yanzhengma = sc.next();
                if (yanzhengma.equalsIgnoreCase(sb)) {
                    user u = new user(id, password, (String)null, (String)null);
                    boolean flag2 = cheak(list, u);
                    if (flag2) {
                        System.out.println("登陆成功");
                        students ss = new students();
                        students.studentstart();
                    } else {
                        System.out.println("用户名密码错误，登录失败");
                    }

                    return;
                }

                System.out.println("验证码输入错误，请重新输入");
            }
        }
    }

    public static void zhuce(ArrayList<user> list) {
        Scanner sc = new Scanner(System.in);

        while(true) {
            while(true) {
                System.out.println("请输入注册的用户名：");
                String id = sc.next();
                boolean flag = idcheak(id);
                if (!flag) {
                    System.out.println("用户名格式错误，请重新输入");
                } else {
                    boolean flag2 = contains(list, id);
                    if (flag2) {
                        System.out.println("用户名可用，请输入密码");

                        while(true) {
                            String password1 = sc.next();
                            System.out.println("请确认密码：");
                            String idcard = sc.next();
                            if (password1.equals(idcard)) {
                                System.out.println("两次密码一致，请输入身份证号:");

                                while(true) {
                                    idcard = sc.next();
                                    boolean flag3 = idcontains(idcard);
                                    if (flag3) {
                                        System.out.println("身份证号符合，请输入手机");

                                        while(true) {
                                            String phone = sc.next();
                                            boolean flag4 = phonecontains(phone);
                                            if (flag4) {
                                                System.out.println("注册成功");
                                                user u1 = new user(id, password1, idcard, phone);
                                                list.add(u1);
                                                return;
                                            }

                                            System.out.println("手机号错误，请重新输入：");
                                        }
                                    }

                                    System.out.println("身份证号不符合，请重新输入");
                                }
                            }

                            System.out.println("两次密码不一致，请重新输入密码");
                        }
                    }

                    System.out.println("用户名重复，请重新输入");
                }
            }
        }
    }

    public static void forget(ArrayList<user> list) {
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入用户名");
        String id = sc.next();
        boolean flag1 = contains(list, id);
        if (!flag1) {
            System.out.println("用户名未注册，请先注册");
        } else {
            System.out.println("请输入身份证：");
            String idcard = sc.next();
            System.out.println("请输入手机号：");
            String phone = sc.next();
            user u = new user(id, (String)null, idcard, phone);
            int index = cheak2(list, u);
            if (index != -1) {
                user u2 = (user)list.get(index);
                System.out.println("信息一致，请输入修改后的密码：");
                String password = sc.next();
                u2.setPassword(password);
                System.out.println("修改成功");
            } else {
                System.out.println("账号信息不匹配，修改失败");
            }

        }
    }

    public static boolean idcheak(String id) {
        if (id.length() >= 3 && id.length() <= 15) {
            int count;
            int i;
            for(count = 0; count < id.length(); ++count) {
                i = id.charAt(count);
                if ((i < 97 || i > 122) && (i < 65 || i > 90) && (i < 48 || i > 57)) {
                    return false;
                }
            }

            count = 0;

            for(i = 0; i < id.length(); ++i) {
                char a = id.charAt(i);
                if (a >= 'a' && a <= 'z' || a >= 'A' && a <= 'Z') {
                    ++count;
                }
            }

            return count > 0;
        } else {
            return false;
        }
    }

    public static boolean contains(ArrayList<user> list, String id) {
        for(int i = 0; i < list.size(); ++i) {
            user u = (user)list.get(i);
            if (u.getId().equals(id)) {
                return false;
            }
        }

        return true;
    }

    public static boolean idcontains(String idcard) {
        if (idcard.length() != 18) {
            return false;
        } else {
            char a = idcard.charAt(0);
            if (a == '0') {
                return false;
            } else {
                for(int i = 0; i < idcard.length() - 1; ++i) {
                    char b = idcard.charAt(i);
                    if (b < '0' || b > '9') {
                        return false;
                    }
                }

                char c = idcard.charAt(17);
                if ((c > '9' || c < '0') && c != 'x' && c != 'X') {
                    return false;
                } else {
                    return true;
                }
            }
        }
    }

    public static boolean phonecontains(String phone) {
        if (phone.length() != 11) {
            return false;
        } else {
            char a = phone.charAt(0);
            if (a == '0') {
                return false;
            } else {
                for(int i = 0; i < phone.length(); ++i) {
                    char b = phone.charAt(i);
                    if (b < '0' || b > '9') {
                        return false;
                    }
                }

                return true;
            }
        }
    }

    public static String produceY() {
        Random r = new Random();
        ArrayList<Character> list = new ArrayList();

        for(int i = 0; i < 26; ++i) {
            list.add((char)(97 + i));
            list.add((char)(65 + i));
        }

        StringBuilder sb = new StringBuilder();

        int number;
        int index;
        for(number = 0; number < 4; ++number) {
            int index = r.nextInt(26);
            index = (Character)list.get(index);
            sb.append((char)index);
        }

        number = r.nextInt(10);
        sb.append(number);
        char[] arr = sb.toString().toCharArray();
        index = r.nextInt(5);
        char temp = arr[4];
        arr[4] = arr[index];
        arr[index] = temp;
        System.out.println(arr);
        return new String(arr);
    }

    public static boolean cheak(ArrayList<user> list, user u) {
        int index = -1;

        for(int i = 0; i < list.size(); ++i) {
            user u1 = (user)list.get(i);
            if (u.getId().equals(u1.getId())) {
                index = i;
            }
        }

        user u2 = (user)list.get(index);
        if (u.getPassword().equals(u2.getPassword())) {
            return true;
        } else {
            return false;
        }
    }

    public static int cheak2(ArrayList<user> list, user u) {
        int index = -1;

        for(int i = 0; i < list.size(); ++i) {
            user u1 = (user)list.get(i);
            if (u.getId().equals(u1.getId())) {
                index = i;
            }
        }

        user u2 = (user)list.get(index);
        if (u.getIdcard().equals(u2.getIdcard()) && u.getPhone().equals(u2.getPhone())) {
            return index;
        } else {
            return -1;
        }
    }
}
//这是最后一个