题目:
package Project.Student_system_upper版;public class 题目学生股那里系统upper {//增删改查可以直接参照之前的文件代码(cv大法)/* 为学生管理系统写一个登录,注册,忘记密码的功能只有用户登陆成功之后,才能进入到学生管理系统中进行相应操作*//*分析:1. 登陆界面需要有以下内容:欢迎来到学生管理系统其选择操作:1. 登录 2. 注册 3. 忘记密码2. 用户类:属性: 1. 用户名 2. 密码 3. 身份证号码 4. 手机号码注册功能:1. 用户名满足以下要求:验证要求:(1)用户名唯一(2)用户名长度必须在3~15位之间(3)只能是字母和数字的组合,但是不能是纯数字2. 密码键盘要输入两次,两次一直才可以进行注册3. 身份证号码需要验证:验证要求:(1)长度为18位(2)不能以0开头(3)前17位,必须都是数字4. 手机号验证:验证要求:(1)长度为11位(2)不能以0开头(3)必须都是数字登录功能:1. 键盘录入用户名2. 键盘录入密码3. 键盘录入验证码验证要求:(1)用户名如果未注册,直接结束方法,并提示:用户名未注册,请先注册(2)判断验证码是否正确,如不正确,重新读入(3)再判断用户名和密码是否正确,有3次机会忘记密码:1. 键盘录入用户名,判断当前用户名是否存在,如果不存在直接结束方法,并提示:未注册2. 键盘录入身份证号码和手机号码3. 判断当前用户的身份证号和手机号码是否一致(1)如果一致,则提示输入密码,进行修改(2)如果不一致,则提示:账号信息不匹配,修改失败验证码规则:1. 长度为52. 由4位大写或者小写字母和1位数字组成,同一个字母可以重复3. 数字可以出现在任意位置*/ }
思路:
package Project.Student_system_upper版;public class 思路 {//增删改查,cv前面的代码//思路:// 1.写用户类// 2.用方法读出登陆界面// 3.用方法读取用户在登陆界面所输入的选项//注册功能:// 4.写方法,传入的参数为用户集合// 5.先读入一个用户名// 6.判断用户名长度是否在3~15位之间 (不是提示:用户名不符合规范)// 7.判断用户名是否全是数字 (是提示:用户名不符合规范)// 8.判断用户名是否唯一 (不是提示:用户名重复)// (写方法)无参数,返回布尔值// 9.第一次 读入密码(无要求不现实:个人添加要求:长度为10位以下)// 10.第二次 读入密码// 11.判断这两次密码是否一致// (写方法)无参数,返回字符串// 12.读入身份证号码// 13.判断长度是否为18 (不是提示:身份证号码不符合规范)// 14.判断前17位是否都为数字 (不是提示:身份证号码不符合规范)// 15.判断第1位是否为0 (是提示:身份证号码不符合规范)// (写方法)无参数,返回字符串// 16.读入手机号// 17.判断长度是否为11 (不是提示:手机号码不符合规范)// 18.判断是否都是数字 (不是提示:手机号码不符合规范)// 19.判断是否以0开头 (是提示:手机号码不符合规范)//登录功能:// (写方法)传入用户集合// 1.录入用户名// 2.用户名如果未注册,直接结束方法,并提示:用户名未注册,请先注册// 3.录入密码//// (写方法)生成一个验证码// 1.长度为5// 2.由4位大写或者小写字母和1位数字组成,同一个字母可以重复// 3.数字可以出现在任意位置// 4.判断验证码是否正确,如不正确,重新读入// (写方法)传入用户集合,用户名,密码,无返回// 5.判断用户名和密码是否正确,有3次机会////////忘记密码:// (写方法)传入用户集合// 1. 键盘录入用户名,判断当前用户名是否存在,如果不存在直接结束方法,并提示:未注册// 2. 键盘录入身份证号码和手机号码// 3. 判断当前用户的身份证号和手机号码是否一致// (1)如果一致,则提示输入密码,进行修改// (2)如果不一致,则提示:账号信息不匹配,修改失败//增删改查 }
开始建类:
package Project.Student_system_upper版;public class User_Object {private String User_name; //用户名private String Pass_word; //密码private String ID_Number; //身份证号码private String Phone_number; //手机号码public User_Object() {}public User_Object(String User_name, String Pass_word, String ID_Number, String Phone_number) {this.User_name = User_name;this.Pass_word = Pass_word;this.ID_Number = ID_Number;this.Phone_number = Phone_number;}/*** 获取* @return User_name*/public String getUser_name() {return User_name;}/*** 设置* @param User_name*/public void setUser_name(String User_name) {this.User_name = User_name;}/*** 获取* @return Pass_word*/public String getPass_word() {return Pass_word;}/*** 设置* @param Pass_word*/public void setPass_word(String Pass_word) {this.Pass_word = Pass_word;}/*** 获取* @return ID_Number*/public String getID_Number() {return ID_Number;}/*** 设置* @param ID_Number*/public void setID_Number(String ID_Number) {this.ID_Number = ID_Number;}/*** 获取* @return Phone_number*/public String getPhone_number() {return Phone_number;}/*** 设置* @param Phone_number*/public void setPhone_number(String Phone_number) {this.Phone_number = Phone_number;}public String toString() {return "User_Object{User_name = " + User_name + ", Pass_word = " + Pass_word + ", ID_Number = " + ID_Number + ", Phone_number = " + Phone_number + "}";} }
开始主类:
package Project.Student_system_upper版;import Project.Student_system.Student_Object;import java.util.ArrayList; import java.util.Random; import java.util.Scanner;public class Main {public static void main(String[] args) {ArrayList<User_Object> Tuple_User = new ArrayList<>();int number = Login_Interface();//获得登陆界面选项和打印登陆界面while (true) {if (number == 1) {if (Login(Tuple_User)) {ArrayList<Student_Object> Tuple_Student = new ArrayList<>();Initial_Menu();while (true) {int User_Number = Get_User_Number();if (User_Number == 1) {ADD_Student(Tuple_Student);System.out.println("还有需要请读入数字:");}else if (User_Number == 2) {Delete_Student(Tuple_Student);}else if (User_Number == 3) {Modify_Student(Tuple_Student);System.out.println("还有需要请读入数字:");} else if (User_Number == 4) {Find_Student(Tuple_Student);System.out.println("还有需要请读入数字:");} else if (User_Number == 5) {System.out.println("退出程序中...");System.exit(0); //停止虚拟机运行} else if (User_Number == 6) {Print_all_data(Tuple_Student);}}}number = Login_Interface();} else if (number == 3) {Forgot_Password(Tuple_User);number = Login_Interface();} else if (number == 2) {Register_Account(Tuple_User);number = Login_Interface();}else if(number == 4){System.out.println("程序退出中...");System.exit(0);}}}////登录界面//登陆界面(返回用户在登陆界面的选项) 无参数public static int Login_Interface() {System.out.println("欢迎来到学生管理系统\n" + "其选择操作:1. 登录 2. 注册 3. 忘记密码");System.out.print("请读入您的选项:");Scanner sc = new Scanner(System.in);int number = sc.nextInt();return number;}//登录功能(登入成功返回true,失败返回false)参数为用户集合public static boolean Login(ArrayList<User_Object> Tuple_User) {Scanner sc = new Scanner(System.in);while (true) {System.out.print("请输入用户名:");String User_name = sc.next();for (int i = 0; i < 3; i++) {if (User_name_judement(Tuple_User, User_name)) {System.out.print("请输入密码:");String Pass_word = sc.next();String CAPTCHA = CAPTCHA(); //获取验证码if (CAPTCHA_judgment(CAPTCHA)) {if (Judgement_username_and_password(Tuple_User, User_name, Pass_word)) {System.out.println("登入成功");return true;} else {System.out.println("密码错误!请重新读入:");System.out.println("您还有" + (2 - i) + "次机会写入密码");if (i == 2) {System.out.println("账户锁定!");return false;}}}} else {System.out.println("用户名未注册,请先注册!");return false;}}}}//判断密码是否正确(这里其实有问题,我在判断用户名存在问题上就已经解决了用户名是否正确,所以这里只需要判断密码是否正确就ok)正确返回ture,错误返回falsepublic static boolean Judgement_username_and_password(ArrayList<User_Object> Tuple_User, String User_name, String Pass_word) {for (int i = 0; i < Tuple_User.size(); i++) {if (Tuple_User.get(i).getUser_name().equals(User_name)) {if (Tuple_User.get(i).getPass_word().equals(Pass_word)) {return true;}}}return false;}//用户名判断(存在返回true,不存在返回false) 参数为:用户集合,用户名public static boolean User_name_judement(ArrayList<User_Object> Tuple_User, String User_name) {for (int i = 0; i < Tuple_User.size(); i++) {if (Tuple_User.get(i).getUser_name().equals(User_name)) {return true;}}return false;}//验证码判断(写对了返回ture,错了返回false)参数为验证码public static boolean CAPTCHA_judgment(String CAPTCHA) {Scanner sc = new Scanner(System.in);while (true) {System.out.println("验证码为:" + CAPTCHA);System.out.print("请输入验证码");String User_CAPTCHA = sc.next();if (User_CAPTCHA.equals(CAPTCHA)) {return true;} else {System.out.println("验证码错误,请重新读入验证码!");CAPTCHA = CAPTCHA();}}}//生成验证码(无参数)public static String CAPTCHA() {char Result[] = new char[5];char alphabet[] = new char[52];char Number[] = new char[10];char sign = 'A';int i = 0;while (sign <= 'Z') {alphabet[i++] = sign++;}sign = 'a';while (sign <= 'z') {alphabet[i++] = sign++;}char number_sign = '0';int j = 0;while (number_sign <= '9') {Number[j++] = number_sign++;}// for (i = 0; i < alphabet.length; i++) { // System.out.print(alphabet[i]); // } // System.out.println("\n"); // for (i = 0; i < Number.length; i++) { // System.out.print(Number[i]); // }Random r = new Random();int random_number_index_in_Result = r.nextInt(Result.length);int number_index = r.nextInt(Number.length);char number_char = Number[number_index];Result[random_number_index_in_Result] = number_char;for (i = 0; i < Result.length; i++) {if (Result[i] == '\0') {int random_index = r.nextInt(alphabet.length);char Alphabet = alphabet[random_index];Result[i] = Alphabet;}}String result_string = new String(Result);return result_string;}//忘记密码//忘记密码public static void Forgot_Password(ArrayList<User_Object> Tuple_User) {Scanner sc = new Scanner(System.in);System.out.print("请写入您想寻找的用户名:");String User_name = sc.next();if (User_name_judement(Tuple_User, User_name)) {System.out.println("请写入您的ID:");String ID = sc.next();System.out.println("请输入您的手机号码:");String Phone = sc.next();if (Judgment_Mobile_ID_Number(Tuple_User, User_name, ID, Phone)) {Change_Password(Tuple_User, User_name);}} else {System.out.println("未注册");System.exit(0);}}//判断身份证号和手机号是否一致(传入用户集合,用户名,身份证号码,手机号码) 是返回true,否返回falsepublic static boolean Judgment_Mobile_ID_Number(ArrayList<User_Object> Tuple_User, String User_name, String ID, String Phone) {for (int i = 0; i < Tuple_User.size(); i++) {if (Tuple_User.get(i).getUser_name().equals(User_name)) {if (Tuple_User.get(i).getID_Number().equals(ID) && Tuple_User.get(i).getPhone_number().equals(Phone)) {return true;} else {System.out.println("身份证号码或者手机号码错误!");return false;}}}return false;}//修改密码(传入用户集合,用户名) 修改结束提示:修改完成public static void Change_Password(ArrayList<User_Object> Tuple_User, String User_name) {Scanner sc = new Scanner(System.in);while (true) {System.out.println("请修改您的密码:");String number = sc.next();if (Pass_Word(number)) {for (int i = 0; i < Tuple_User.size(); i++) {if (Tuple_User.get(i).getUser_name().equals(User_name)) {Tuple_User.get(i).setPass_word(number);System.out.println("修改完毕");return;}}} else {System.out.println("您的密码格式不符合规格,请重新输入!");}}}//判断密码是否符合规格并返回密码,无参数public static String Pass_Word() {Scanner sc = new Scanner(System.in);while (true) {System.out.println("请输入密码:");String pass_word = sc.next();if (pass_word.length() <= 10) {System.out.println("请再次输入密码:");String pass = sc.next();if (pass.equals(pass_word)) {return pass;}} else {System.out.println("密码不符合规格,请重新输入:");}}}//判断密码是否符合规格public static boolean Pass_Word(String pass_word) {if (pass_word.length() <= 10 && pass_word.length() >= 1) {return true;} else {return false;}}/////注册账户//注册账户public static void Register_Account(ArrayList<User_Object> Tuple_User) {String U_N = Get_Name();String Correct_U_N = Get_Correctly_UN(Tuple_User, U_N);String Correct_P_W = Get_password();String ID = Get_ID();String Correct_ID = Get_ID(ID);String Phone_number = Phone_N();String Correct_P_N = Get_Phone(Phone_number);User_Object user = new User_Object(Correct_U_N, Correct_P_W, Correct_ID, Correct_P_N);Tuple_User.add(user);System.out.println("存入完毕");}//判断用户名长度是否符合(传入参数:用户名)正确返回true,错误返回falsepublic static boolean Judgment_Username_Length(String User_name) {if (User_name.length() >= 3 && User_name.length() <= 15) {return true;}return false;}//判断用户名是否全都是数字(传入参数:用户名)正确返回true,错误返回falsepublic static boolean Judgment_Username_NOT_All_Number(String User_name) {//思路: 1. 可以用一个计数器,记录出现了多少个数字,如果总个数==字符串长度,则返回false// 2. 或者只要出现了一个不是数字样式的,就返回turechar char_User_name[] = User_name.toCharArray();for (int i = 0; i < char_User_name.length; i++) {if (char_User_name[i] < '0' && char_User_name[i] > '9') {return false;}}return true;}//判断用户名是否唯一(传入参数:用户集合,用户名)唯一返回true,不唯一返回falsepublic static boolean Judgment_Username_Unique(ArrayList<User_Object> Tuple_User, String User_name) {//思路:1.计数器思想// 2. 先找到第一次出现此用户名的集合索引,从这个索引往后找,如果还出现就返回false,没出现就返回truefor (int i = 0; i < Tuple_User.size(); i++) {if (Tuple_User.get(i).getUser_name().equals(User_name)) {for (int j = i; j < Tuple_User.size(); j++) {j++;if (Tuple_User.get(j).getUser_name().equals(User_name)) {return false;}}}}return true;}//用户读入用户名(空参) 返回用户名public static String Get_Name() {Scanner sc = new Scanner(System.in);System.out.println("请输入您的用户名:");String U_N = sc.next();return U_N;}//(正确)获得用户名(参数:用户集合,用户名)正确返回public static String Get_Correctly_UN(ArrayList<User_Object> Tuple_User, String User_name) {if (Judgment_Username_Length(User_name)) {if (Judgment_Username_NOT_All_Number(User_name)) {if (Judgment_Username_Unique(Tuple_User, User_name)) {return User_name;} else {System.out.println("用户名重复");System.exit(0);}} else {System.out.println("用户名不符合规范(数字)");System.exit(0);}} else {System.out.println("用户名不符合规范(长度)");System.exit(0);}return "用户名错误";}//注册判断密码//用户读入密码public static String Get_password() {Scanner sc = new Scanner(System.in);System.out.println("请输入密码:");String password = sc.next();System.out.println("请再次读入密码:");String pd = sc.next();if (pd.equals(password) && Register_Judgement_Password(password)) {return password;}else{System.out.println("密码不同或者长度超过!");System.exit(0);}return "密码错误";}//注册判断密码(修改密码的方法返回参数,这里需要再写一个方法)参数:用户密码. 符合规范返回true,不符合返回falsepublic static boolean Register_Judgement_Password(String U_PW) {if (U_PW.length() <= 10) {return true;}return false;}//注册判断身份证号码//用户读入身份证号码(无参数)返回用户读入的身份证号码public static String Get_ID() {Scanner sc = new Scanner(System.in);System.out.println("请输入身份证号码:");String ID = sc.next();return ID;}//判断长度是否为18(参数为身份证号码) 是18返回true,否返回falsepublic static boolean Length_18(String ID) {if (ID.length() == 18) {return true;}System.out.println("身份证号码不符合规范");return false;}//判断前17位是否都为数字(参数为身份证号码) 是返回true,否返回falsepublic static boolean ID_17_ISnumber(String ID) {//思路: 前17位出现了一个不是数字就返回falsechar[] ID_char = ID.toCharArray();for (int i = 0; i < ID_char.length - 1; i++) {if (ID_char[i] < '0' || ID_char[i] > '9') {System.out.println("身份证号码不符合规范");return false;}}return true;}//判断第1位是否为0(参数为身份证号码) 是返回true,否返回falsepublic static boolean ID_First_IS0(String ID) {char[] ID_char = ID.toCharArray();if (ID_char[0] == '0') {System.out.println("身份证号码不符合规范");return true;}return false;}//返回正确的身份号码public static String Get_ID(String ID) {if (Length_18(ID) && ID_17_ISnumber(ID)) {if (!ID_First_IS0(ID)) {return ID;}}else{System.out.println("ID错误");System.exit(0);}return "ID错误";}//注册判断手机号//用户读入手机号(无参数) 返回手机号public static String Phone_N() {Scanner sc = new Scanner(System.in);System.out.println("请输入手机号:");String NB = sc.next();return NB;}//判断长度是否为11(参数:手机号) 是返回true,否返回falsepublic static boolean NB_Length_IS11(String Phone) {if (Phone.length() == 11) {return true;}System.out.println("手机号码不符合规范");return false;}//判断是否都是数字(参数:手机号) 是返回true,否返回falsepublic static boolean ALL_NB(String Phone) {char[] NB = Phone.toCharArray();for (int i = 0; i < NB.length; i++) {if (NB[i] < '0' || NB[i] > '9') {System.out.println("手机号码不符合规范");return false;}}return true;}//判断是否以0开头(参数:手机号) 是返回true,否返回falsepublic static boolean Head_IS_0(String Phone) {char[] phone_char = Phone.toCharArray();if (phone_char[0] == '0') {System.out.println("身份证号码不符合规范");return true;}return false;}//返回正确的手机号public static String Get_Phone(String Phone) {if (NB_Length_IS11(Phone) && ALL_NB(Phone)) {if (!Head_IS_0(Phone)) {return Phone;}}System.out.println("手机号错误");System.exit(0);return "手机号错误";}//打印初始菜单public static void Initial_Menu() {System.out.println("-----------------欢迎来到学生管理系统------------------\n" +"1: 添加学生\n" +"2: 删除学生\n" +"3: 修改学生\n" +"4: 查询学生\n" +"5: 退出\n" +"请输入您的选择:");}//读入用户所传入选项public static int Get_User_Number() {Scanner sc = new Scanner(System.in);int number = sc.nextInt();return number;}//添加学生功能实现public static void ADD_Student(ArrayList<Student_Object> Tuple_Student) {Scanner sc = new Scanner(System.in);while (true) {//读入学生ID(string类型)System.out.println("读入要添加的学生的ID:");String ID = sc.next();//读入学生姓名System.out.println("读入要添加的学生的Name:");String Name = sc.next();//读入学生年龄System.out.println("读入要添加的学生的Age:");int Age = sc.nextInt();//读入学生住址:System.out.println("读入要添加的学生的住址:");String Home_address = sc.next();//用户读入学生信息Student_Object Student = new Student_Object(ID, Name, Age, Home_address);int sign = 0;//存入学生数据(要判断ID是否唯一)for (int i = 0; i < Tuple_Student.size(); i++) {if (Tuple_Student.get(i).getID().equals(Student.getID())) {System.out.println("有重复ID,不得添加!,请重新读入:");sign = 1;}}if (sign == 0) {Tuple_Student.add(Student);System.out.println("添加成功!");return;}}}//删除学生功能实现public static void Delete_Student(ArrayList<Student_Object> Tuple_Student) {Scanner sc = new Scanner(System.in);//存入用户想删除的学生的IDSystem.out.println("请读入您想删除的学生的ID:");String Delete_ID = sc.next();//判断是否存在此IDfor (int i = 0; i < Tuple_Student.size(); i++) {if (Tuple_Student.get(i).getID().equals(Delete_ID)) {Tuple_Student.remove(i);//删除此学生对象System.out.println("删除成功");System.out.println("还有需要请读入数字:");return;}}System.out.println("无此学生ID");Initial_Menu();}//修改学生功能实现public static void Modify_Student(ArrayList<Student_Object> Tuple_Student) {Scanner sc = new Scanner(System.in);//读入学生ID(string类型)System.out.println("读入要修改的学生的ID:");String ID = sc.next();//读入学生姓名System.out.println("读入要修改的学生的Name:");String Name = sc.next();//读入学生年龄System.out.println("读入要修改的学生的Age:");int Age = sc.nextInt();//读入学生住址:System.out.println("读入要修改的学生的住址:");String Home_address = sc.next();while (true) {//存入用户想修改的学生的IDSystem.out.println("请读入您想修改的学生的ID:");String Delete_ID = sc.next();//判断是否存在此IDfor (int i = 0; i < Tuple_Student.size(); i++) {if (Tuple_Student.get(i).getID().equals(Delete_ID)) {Tuple_Student.get(i).setAge(Age);Tuple_Student.get(i).setID(ID);Tuple_Student.get(i).setName(Name);Tuple_Student.get(i).setHome_address(Home_address);System.out.println("修改成功");return;}}System.out.println("无此学生ID,请重新读入:");}}//查询功能实现public static void Find_Student(ArrayList<Student_Object> Tuple_Student) {Scanner sc = new Scanner(System.in);while (true) {//存入用户想删除的学生的IDSystem.out.println("请读入您想查询的学生的ID:");String Delete_ID = sc.next();//判断是否存在此IDfor (int i = 0; i < Tuple_Student.size(); i++) {if (Tuple_Student.get(i).getID().equals(Delete_ID)) {System.out.println("ID为: " + Tuple_Student.get(i).getID() + ".. 名字为: " + Tuple_Student.get(i).getName() + ".. 年龄为:" +Tuple_Student.get(i).getAge() + ".. 住址为: " + Tuple_Student.get(i).getHome_address());return;}}System.out.println("无此学生ID,请重新读入:");}}//打印全部数据public static void Print_all_data(ArrayList<Student_Object> Tuple_Student) {for (int i = 0; i < Tuple_Student.size(); i++) {System.out.println("ID " + "姓名 " + "年龄 " + " 家庭住址");System.out.println(Tuple_Student.get(i).getID() + " " + Tuple_Student.get(i).getName() + " " + Tuple_Student.get(i).getAge() + " " + Tuple_Student.get(i).getHome_address());}} }