要求文档
注册页面分析
登录页面分析
忘记密码
User.java
package Studentsystem;
public class User {
private String username;
private String password;
private String personID;
private String phoneNumber;
public User() {
}
public User(String username, String password, String personID, String phoneNumber) {
this.username = username;
this.password = password;
this.personID = personID;
this.phoneNumber = phoneNumber;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getPersonID() {
return personID;
}
public void setPersonID(String personID) {
this.personID = personID;
}
public String getPhoneNumber() {
return phoneNumber;
}
public void setPhoneNumber(String phoneNumber) {
this.phoneNumber = phoneNumber;
}
@Override
public String toString() {
return "User{" +
"username='" + username + '\'' +
", password='" + password + '\'' +
", personID='" + personID + '\'' +
", phoneNumber='" + phoneNumber + '\'' +
'}';
}
}
App.java
package Studentsystem;
import java.util.ArrayList;
import java.util.Random;
import java.util.Scanner;
public class App {
public static void main(String[] args) {
ArrayList<User> list = new ArrayList<User>();
Scanner sc = new Scanner(System.in);
while (true) {
System.out.println("欢迎来到学生管理系统");
System.out.println("请选择你的操作:1.登录 2.注册 3.忘记密码");
int choose = sc.nextInt();
switch (choose) {
case 1:
login(list);
break;
case 2:
register(list);
break;
case 3:
forgetPassword(list);
break;
case 4:
System.out.println("谢谢使用,再见");
System.exit(0);
default:
System.out.println("没有这个选项");
}
}
}
private static void forgetPassword(ArrayList<User> list) {
Scanner sc = new Scanner(System.in);
System.out.println("请输入用户名");
String username = sc.next();
boolean flag = contains(list, username);
if (!flag){
System.out.println("当前用户"+username+"未注册,请先注册");
return;
}
//键盘录入身份证号码和手机号码
System.out.println("请输入身份证号码");
String personID = sc.next();
System.out.println("请输入手机号码");
String phoneNumber = sc.next();
//比较用户对象中的手机号码和身份证号码是否相同
//需要把用户对象通过索引先获取出来
int index =findIndex(list,username);
User user = list.get(index);
if (!(user.getPersonID().equalsIgnoreCase(personID) && user.getPhoneNumber().equals(phoneNumber))){
System.out.println("身份证号码或者手机号有误,不能修改密码");
return;
}
//当代码执行到这里,就表示所有数据确认成功,直接修改即可
String password;
while (true) {
System.out.println("请输入新的密码");
password = sc.next();
System.out.println("请再次输入新的密码");
String againpassword = sc.next();
if (!password.equals(againpassword)) {
System.out.println("两次密码输入不一致,请重新输入");
continue;
} else {
System.out.println("两次密码一致,继续录入其他数据");
break;
}
}
user.setPassword(password);
System.out.println("密码修改成功");
}
private static int findIndex(ArrayList<User> list, String username) {
for (int i = 0; i < list.size(); i++) {
User user = list.get(i);
if (user.getUsername().equals(username)){
return i;
}
}
return -1;
}
private static void register(ArrayList<User> list) {
//用户名,密码,身份证号码,手机号码放到用户对象当中
//把用户信息加入到集合当中
Scanner sc = new Scanner(System.in);
String username;
while (true) {
System.out.println("请输入用户名");
username = sc.next();
//用户验证格式是否正确,先验证格式是否正确,再确定是否唯一
boolean flag1 = cheakUsername(username);
if (!flag1) {
System.out.println("用户名格式不满足条件,需要重新输入");
continue;
}
//检验用户名是否唯一
//username到集合中判断是否存在
boolean flag2 = contains(list, username);
if (flag2) {
//用户名以存在
System.out.println("用户名" + username + "已存在,请重新输入");
} else {
//不存在,表示当前用户名可用,可以继续录入下面的 其他数据
System.out.println("用户名" + username + "可用");
break;
}
}
//2.键盘登录密码
String password;
while (true) {
System.out.println("请输入要注册的密码");
password = sc.next();
System.out.println("请再次输入要注册的密码");
String againpassword = sc.next();
if (!password.equals(againpassword)) {
System.out.println("两次密码输入不一致,请重新输入");
continue;
} else {
System.out.println("两次密码一致,继续录入其他数据");
break;
}
}
//键盘录入身份证信息
String personID;
while (true) {
System.out.println("请输入身份证号码");
personID = sc.next();
boolean flag = checkPersonID(personID);
if (flag) {
System.out.println("身份证号码满足要求");
break;
} else {
System.out.println("身份证号码格式有误,请重新输入");
continue;
}
}
//键盘录入手机号码
String phoneNumber;
while (true) {
System.out.println("请输入手机号码");
phoneNumber = sc.next();
boolean flag = checkPhoneNumber(phoneNumber);
if (flag) {
System.out.println("号码格式正确");
break;
} else {
System.out.println("号码格式有误,请重新输入");
continue;
}
}
//把所有的都放到对象里面
User u = new User(username, password, personID, phoneNumber);
//把对象添加到集合当中
list.add(u);
System.out.println("注册成功");
//遍历集合
printList(list);
}
private static void printList(ArrayList<User> list) {
for (int i = 0; i < list.size(); i++) {
User user = list.get(i);
System.out.println(user.getUsername() + "," + user.getPassword() + "," + user.getPersonID() + "," + user.getPhoneNumber());
}
}
private static boolean checkPhoneNumber(String phoneNumber) {
//长度为11位
if (phoneNumber.length() != 11) {
return false;
}
//不能以0为开头
if (phoneNumber.startsWith("0")) {
return false;
}
//必须都是数字
for (int i = 0; i < phoneNumber.length(); i++) {
char c = phoneNumber.charAt(i);
if (!(c >= '0' && c <= '9')) {
return false;
}
}
return true;
}
private static boolean checkPersonID(String personID) {
//长度为十八
if (personID.length() != 18) ;
//不能以0为开头
boolean flag = personID.startsWith("0");
if (flag) {
//如果以0开头返回false
return false;
}
//前面17位必须是数字
for (int i = 0; i < personID.length() - 1; i++) {
char c = personID.charAt(i);
if (!(c >= '0' && c <= '9')) {
return false;
}
}
//最后一位可以是数字,也可以是X或者x
char endCher = personID.charAt(personID.length() - 1);
if ((endCher >= '0' && endCher <= '9') || (endCher == 'X') || (endCher == 'x')) {
return true;
} else {
return false;
}
}
private static boolean contains(ArrayList<User> list, String username) {
//循环扁你集合得到每一个用户对象
//拿着用户对象中的用户名进行比较
for (int i = 0; i < list.size(); i++) {
//索引
User user = list.get(i);
String rightUsername = user.getUsername();
if (rightUsername.equals(username)) {
return true;
}
}
return false;
}
private static boolean cheakUsername(String username) {
int len = username.length();
if (len < 3 || len > 15) {
return false;
}
//循环得到里面的每一个字符
for (int i = 0; i < username.length(); i++) {
char c = username.charAt(i);
if (!((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9'))) {
return false;
}
}
//当代码执行到这里,说明长度满足内容也满足
//统计用户名中有多少个字母就可以满足(不是纯数字)这个条件
int count = 0;
for (int i = 0; i < username.length(); i++) {
char c = username.charAt(i);
if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')) {
count++;
break;
}
}
return count > 0;
}
private static void login(ArrayList<User> list) {
Scanner sc = new Scanner(System.in);
for (int i = 0; i < 3; i++) {
System.out.println("请输入用户名");
String username = sc.next();
//判断用户名是否存在
boolean flag = contains(list, username);
if (!flag) {
System.out.println("用户名" + username + "未注册,登录失败");
return;
}
System.out.println("请输入密码");
String password = sc.next();
while (true) {
String rightCode = getCode();
System.out.println("当前正确的验证码为" + rightCode);
System.out.println("请输入验证码");
String code = sc.next();
if (code.equalsIgnoreCase(rightCode)) {
System.out.println("验证码正确");
break;
} else {
System.out.println("验证码错误");
continue;
}
}
//验证用户名和密码是否正确
//集合中是否包含用户名和密码
//定义一个方法验证用户名和密码是否正确
//封装思想的应用
//我们可以把一些零散的数据,封装成一个对象
//以后传递参数的时候,只需要传递一个整体就好了,不需要管这些零散数据
User useInfo = new User(username, password, null, null);
boolean resulit = checkUserInfo(list, useInfo);
if (resulit) {
System.out.println("登录成功,可以开始使用学生管理系统了");
//创建对象调用方法,启动学生管理系统
StudentSystem ss = new StudentSystem();
ss.startStudentSystem();
break;
} else {
System.out.println("登陆失败,用户名或密码错误");
if (i == 2){
System.out.println("当前账号"+username+"被锁定,请联系学生处办公室:XXX-XXXXXX");
return;
}else {
System.out.println("用户名或密码错误,还剩下"+(2-i)+"次机会");
}
}
}
}
private static boolean checkUserInfo(ArrayList<User> list, User useInfo) {
//遍历结合查看用户是否存在,如果存在登录成功,如果不存在登录失败
for (int i = 0; i < list.size(); i++) {
User user = list.get(i);
if (user.getUsername().equals(useInfo.getUsername()) && user.getPassword().equals(useInfo.getPassword())) {
return true;
}
}
return false;
}
private static String getCode() {
//1.创建一个集合,加入所有的大写和小写字母
ArrayList<Character> list = new ArrayList<Character>();
for (int i = 0; i < 26; i++) {
list.add((char) ('a' + i));
list.add((char) ('A' + i));
}
//2.随机抽取4个字符
StringBuilder sb = new StringBuilder();
Random r = new Random();
for (int i = 0; i < 4; i++) {
//获得随机索引
int index = r.nextInt(list.size());
//利用随机索引获取字符
char c = list.get(index);
sb.append(c);
}
//3.把一个随机数字添加到末尾
int number = r.nextInt(10);
sb.append(number);
//4.如果我吗要修改字符串中的内容
//先把字符串变成字符数组,在数组中修改,然后再创建一个新的字符串
char[] arr = sb.toString().toCharArray();
//拿着最后一个索引,跟随机索引进行交换
int i = r.nextInt(arr.length);
//最大索引指向的元素,跟随机索引指向的元素交换
char temp = arr[i];
arr[i] = arr[arr.length - 1];
arr[arr.length - 1] = temp;
return new String(arr);
}
}
Student.java
package Studentsystem;
public class Student {
private String id;
private String name;
private int age;
private String address;
public Student() {
}
public Student(String id, String name, int age, String address) {
this.id = id;
this.name = name;
this.age = age;
this.address = address;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
@Override
public String toString() {
return "Student{" +
"id='" + id + '\'' +
", name='" + name + '\'' +
", age=" + age +
", address='" + address + '\'' +
'}';
}
}
StudentSystem.java
package Studentsystem;
import java.text.BreakIterator;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
public class StudentSystem {
public static void startStudentSystem() {//这里需要做改动,两个才能连起来
ArrayList<Student> list = new ArrayList<Student>();
loop:while (true) {//给循环起个名字
System.out.println("---------------欢迎来到金融学生管理系统---------------");
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("请输入您的选择:");
Scanner sc = new Scanner(System.in);
int choose = sc.nextInt();
switch (choose) {
case 1:
addStudent(list);
break;
case 2:
deleteStudent(list);
break;
case 3:
updataStudent(list);
break;
case 4:
queryStudent(list);
break;
case 5:
System.out.println("退出系统");
break loop;//跳出while循环
// System.exit(0);//第二种写法
default:
System.out.println("无效选择,请重新输入。");
}
}
}
//添加学生
public static void addStudent(ArrayList<Student> list){
Student s = new Student();
Scanner sc = new Scanner(System.in);
while (true) {
System.out.println("请输入学生id");
String id = sc.next();
boolean flag = cheak(list, id);
if (flag){
System.out.println("id已存在,请重新输入");
break;
}else {
s.setId(id);
break;
}
}
System.out.println("请输入学生姓名");
String name = sc.next();
s.setName(name);
System.out.println("请输入学生年龄");
int age = sc.nextInt();
s.setAge(age);
System.out.println("请输入学生家庭住址");
String address = sc.next();
s.setAddress(address);
list.add(s);
//提醒用户
System.out.println("信息添加成功");
}
//删除学生
public static void deleteStudent(ArrayList<Student> list){
Scanner sc = new Scanner(System.in);
System.out.println("请输入想要删除的学生id");
String sid = sc.next();
int index = getIndex(list, sid);
if (index < 0 ){
System.out.println("id不存在,删除失败");
}else {
//找到索引直接删除
list.remove(index);
System.out.println("id为"+sid+"的学生删除成功");
}
}
//修改学生
public static void updataStudent(ArrayList<Student> list){
Scanner sc = new Scanner(System.in);
System.out.println("请输入想要修改的学生id");
String sid = sc.next();
int index = getIndex(list, sid);
if (index == -1){
System.out.println("学生id不存在");
return;
}
//取出需要修改的对象
Student stu = list.get(index);
//输入信息并进行修改
System.out.println("请输入修改的学生姓名");
String newname = sc.next();
stu.setName(newname);
System.out.println("请输入修改的学生年龄");
int newage = sc.nextInt();
stu.setAge(newage);
System.out.println("请输入修改的学生家庭住址");
String newaddress = sc.next();
stu.setAddress(newaddress);
}
//查询学生
public static void queryStudent(ArrayList<Student> list){
if(list.size() == 0){
//结束方法
System.out.println("当前没有学生信息,请添加后查询");
return;
}
//打印表头信息
System.out.println("id\t\t姓名\t年龄\t家庭住址");
//当代码到这里,证明集合中有东西
for (int i = 0; i < list.size(); i++) {
Student stu = list.get(i);
System.out.println(stu.getId()+"\t"+stu.getName()+"\t"+stu.getAge()+"\t"+stu.getAddress());
}
}
//判断id是否存在
public static boolean cheak(ArrayList<Student> list , String id){
// for (int i = 0; i < list.size(); i++) {
// Student stu = list.get(i);
// String sid = stu.getId();
// if (sid.equals(id)){
// return true;
// }
// }
// return false;
return getIndex(list , id) >= 0;
}
public static int getIndex(ArrayList<Student> list , String id){
for (int i = 0; i < list.size(); i++) {
//得到每一个学生对象
Student student = list.get(i);
//得到每一个id
String sid = student.getId();
//进行对比
if (sid.equals(id)){
//有的话返回索引
return i;
}
}
//没有返回-1
return -1;
}
}