JAVA面向对象编程经典小项目之银行小项目------JAVA入门基础教程

package model;
public class Customer
{
    private String name;
    private char gender;
    private int age;
    private String phone;
    private String email;

    public Customer()
    {

    }

    public Customer(String name, char gender, int age, String phone, String email)
    {
        this.name = name;
        this.gender = gender;
        this.age = age;
        this.phone = phone;
        this.email = email;
    }

    public String getName()
    {
        return name;
    }

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

    public char getGender()
    {
        return gender;
    }

    public void setGender(char gender)
    {
        this.gender = gender;
    }

    public int getAge()
    {
        return age;
    }

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

    public String getPhone()
    {
        return phone;
    }

    public void setPhone(String phone)
    {
        this.phone = phone;
    }

    public String getEmail()
    {
        return email;
    }

    public void setEmail(String email)
    {
        this.email = email;
    }
}
package model;

public class Customer
{
    private String name;
    private char gender;
    private int age;
    private String phone;
    private String email;

    public Customer()
    {

    }

    public Customer(String name, char gender, int age, String phone, String email)
    {
        this.name = name;
        this.gender = gender;
        this.age = age;
        this.phone = phone;
        this.email = email;
    }

    public String getName()
    {
        return name;
    }

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

    public char getGender()
    {
        return gender;
    }

    public void setGender(char gender)
    {
        this.gender = gender;
    }

    public int getAge()
    {
        return age;
    }

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

    public String getPhone()
    {
        return phone;
    }

    public void setPhone(String phone)
    {
        this.phone = phone;
    }

    public String getEmail()
    {
        return email;
    }

    public void setEmail(String email)
    {
        this.email = email;
    }
}
package model;

public class CustomerList
{
    private Customer[] customers;
    private int total;
    public CustomerList(int total)
    {
        customers = new Customer[total];
    }
    public boolean addCustomer(Customer c)
    {
        if(total < customers.length)
        {
            customers[total++] = c;
            return true;
        }
        else
        {
            return false;
        }
    }
    public boolean replaceCustomer(int index,Customer c)
    {
        if(index >= 0 && index < total)
        {
            customers[index] = c;
            return true;
        }
        else
        {
            return false;
        }
    }
/*
//错误原因,没有考虑到整个数组长度问题,会造成不是最后一个数组元素为空
    public boolean deleteCustomer(int index)
    {
        if(index >= 0 && index < total)
        {
            customers[index] = customers[index + 1];
            customers[index + 1] = null;
            total--;
            return true;
        }
        else
        {
            return false;
        }
    }
 */
    public boolean deleteCustomer(int index)
    {
        if(index < 0 || index >= total)
        {
            return false;
        }
        for(int i = index;i < total - 1;i++)
        {
            customers[i] = customers[i + 1];
        }
        customers[--total] = null;
        return true;
    }
    public Customer[] getAllCustomer()
    {
        Customer[] c = new Customer[total];
        for (int i = 0; i < total; i++)
        {
            c[i] = customers[i];
        }
        return c;
    }
    public Customer getCustomer(int index)
    {
        if(index < 0 || index >= total)
        {
            return null;
        }
        else
        {
            return customers[index];
        }
    }
    public int getTotal()
    {
        return total;
    }
}
package model;

public class CustomerList
{
    private Customer[] customers;
    private int total;
    public CustomerList(int total)
    {
        customers = new Customer[total];
    }
    public boolean addCustomer(Customer c)
    {
        if(total < customers.length)
        {
            customers[total++] = c;
            return true;
        }
        else
        {
            return false;
        }
    }
    public boolean replaceCustomer(int index,Customer c)
    {
        if(index >= 0 && index < total)
        {
            customers[index] = c;
            return true;
        }
        else
        {
            return false;
        }
    }
/*
//错误原因,没有考虑到整个数组长度问题,会造成不是最后一个数组元素为空
    public boolean deleteCustomer(int index)
    {
        if(index >= 0 && index < total)
        {
            customers[index] = customers[index + 1];
            customers[index + 1] = null;
            total--;
            return true;
        }
        else
        {
            return false;
        }
    }
 */
    public boolean deleteCustomer(int index)
    {
        if(index < 0 || index >= total)
        {
            return false;
        }
        for(int i = index;i < total - 1;i++)
        {
            customers[i] = customers[i + 1];
        }
        customers[--total] = null;
        return true;
    }
    public Customer[] getAllCustomer()
    {
        Customer[] c = new Customer[total];
        for (int i = 0; i < total; i++)
        {
            c[i] = customers[i];
        }
        return c;
    }
    public Customer getCustomer(int index)
    {
        if(index < 0 || index >= total)
        {
            return null;
        }
        else
        {
            return customers[index];
        }
    }
    public int getTotal()
    {
        return total;
    }
}
package model;

/**
 *
 * @Description CustomerView为主模块,负责菜单的显示和处理用户操作
 * @author Gao
 * @version
 * @date 2022年1月8日下午9:11:48
 *
 */
public class CustomerView {
    // 创建最大包含10个客户对象的CustomerList 对象,供以下各成员方法使用。
    CustomerList customerList = new CustomerList(10);

    /**
     *
     * @Description 显示主菜单,响应用户输入
     * @author Gao
     * @date 2022年1月8日下午9:14:50
     */
    public void enterMainMenu() {
        boolean flag = true;
        while (flag) {
            System.out.println("\n-----------------客户信息管理软件-----------------\n");
            System.out.println("                   1 添 加 客 户");
            System.out.println("                   2 修 改 客 户");
            System.out.println("                   3 删 除 客 户");
            System.out.println("                   4 客 户 列 表");
            System.out.println("                   5 退       出\n");
            System.out.print("                   请选择(1-5):");

            char selection = CMUtility.readMenuSelection();// 获取键盘1-5输入的字符
            switch (selection) {
                case '1':
                    addNewCustomer();
                    break;
                case '2':
                    modifyCustomer();
                    break;
                case '3':
                    deleteCustomer();
                    break;
                case '4':
                    listAllCustomers();
                    break;
                case '5':
                    System.out.print("确定是否退出 Y/N? :");
                    char selection2 = CMUtility.readConfirmSelection();// 判断是否退出
                    if (selection2 == 'Y') {
                        flag = false;
                    }
            }
        }
    }

    /**
     *
     * @Description添加客户
     * @author Gao
     * @date 2022年1月9日下午8:19:35
     */
    private void addNewCustomer() {
        System.out.println("---------------------添加客户---------------------");
        System.out.print("姓名:");
        String name = CMUtility.readString(4);
        System.out.print("性别:");
        char gender = CMUtility.readChar();
        System.out.print("年龄:");
        int age = CMUtility.readInt();
        System.out.print("电话:");
        String phone = CMUtility.readString(11);
        System.out.print("邮箱:");
        String email = CMUtility.readString(20);

        Customer customer = new Customer(name, gender, age, phone, email);
        boolean isOk = customerList.addCustomer(customer);
        if (isOk == true) {
            System.out.println("---------------------添加完成---------------------");
        } else {
            System.out.println("人数已达列表上限,添加失败!!!");
        }
    }

    /**
     *
     * @Description修改客户信息
     * @author Gao
     * @date 2022年1月9日下午8:19:28
     */
    private void modifyCustomer() {
        System.out.println("---------------------修改客户---------------------");
        Customer customer;
        int index;
        for (;;) {

            System.out.print("请选择修改客户编号(-1退出):");
            index = CMUtility.readInt();
            if (index == -1) {
                return;
            }
            customer = customerList.getCustomer(index - 1);// 用户眼中:index从 1开始
            if (customer == null) {
                System.out.print("无法找到指定客户!");
            } else {
                break;
            }
        }

        System.out.print("姓名(" + customer.getName() + "):");
        String name = CMUtility.readString(5, customer.getName());

        System.out.print("性别(" + customer.getGender() + "):");
        char gender = CMUtility.readChar(customer.getGender());

        System.out.print("年龄(" + customer.getAge() + "):");
        int age = CMUtility.readInt(customer.getAge());

        System.out.print("电话(" + customer.getPhone() + "):");
        String phone = CMUtility.readString(13, customer.getPhone());

        System.out.print("邮箱(" + customer.getEmail() + "):");
        String email = CMUtility.readString(15, customer.getEmail());

        Customer newcust = new Customer(name, gender, age, phone, email);
        boolean flag = customerList.replaceCustomer(index - 1, newcust);
        if (flag) {
            System.out.println("---------------------修改完成---------------------");
        } else {
            System.out.println("---------------------修改失败---------------------");
        }

    }

    /**
     *
     * @Description删除客户
     * @author Gao
     * @date 2022年1月9日下午8:19:24
     */
    private void deleteCustomer() {
        System.out.println("---------------------删除客户---------------------");
        Customer customer;
        int index;
        for (;;) {
            System.out.print("请选择待删除客户编号(-1退出):");
            index = CMUtility.readInt();
            if (index == -1) {
                return;
            }
            customer = customerList.getCustomer(index - 1);// 用户眼中:index从 1开始
            if (customer == null) {
                System.out.println("无法找到指定客户!");
            } else {
                break;
            }
        }

        // 找到相应的索引位置的customer后决定是否确认删除
        System.out.print("确认是否删除(Y/N):");
        char delete = CMUtility.readConfirmSelection();
        if (delete == 'Y') {
            boolean flag = customerList.deleteCustomer(index - 1);
            if (flag) {
                System.out.println("---------------------删除完成---------------------");
            } else {
                System.out.println("---------------------删除失败---------------------");
            }
        } else {
            return;
        }
    }

    /**
     *
     * @Description客户列表
     * @author Gao
     * @date 2022年1月9日下午8:17:38
     */
    private void listAllCustomers() {
        System.out.println("---------------------------客户列表---------------------------");
        int num = customerList.getTotal();// 获取当前用户数量
        if (num == 0) {
            System.out.println("没有客户记录!!!");
        } else {
            System.out.println("编号\t姓名\t性别\t年龄\t电话\t\t邮箱");
            Customer[] customers = customerList.getAllCustomer();// 获取所有客户对象
            for (int i = 0; i < num; i++) {
                Customer cust = customers[i];
                System.out.println((i + 1) + "\t" + cust.getName() + "\t" + cust.getGender() + "\t" + cust.getAge()
                        + "\t" + cust.getPhone() + "\t" + cust.getEmail());
            }

        }
        System.out.println("-------------------------客户列表完成-------------------------");
    }

    public static void main(String[] args) {
        CustomerView view = new CustomerView();
        view.enterMainMenu();//
    }

}
package model;

/**
 *
 * @Description CustomerView为主模块,负责菜单的显示和处理用户操作
 * @author Gao
 * @version
 * @date 2022年1月8日下午9:11:48
 *
 */
public class CustomerView {
    // 创建最大包含10个客户对象的CustomerList 对象,供以下各成员方法使用。
    CustomerList customerList = new CustomerList(10);

    /**
     *
     * @Description 显示主菜单,响应用户输入
     * @author Gao
     * @date 2022年1月8日下午9:14:50
     */
    public void enterMainMenu() {
        boolean flag = true;
        while (flag) {
            System.out.println("\n-----------------客户信息管理软件-----------------\n");
            System.out.println("                   1 添 加 客 户");
            System.out.println("                   2 修 改 客 户");
            System.out.println("                   3 删 除 客 户");
            System.out.println("                   4 客 户 列 表");
            System.out.println("                   5 退       出\n");
            System.out.print("                   请选择(1-5):");

            char selection = CMUtility.readMenuSelection();// 获取键盘1-5输入的字符
            switch (selection) {
                case '1':
                    addNewCustomer();
                    break;
                case '2':
                    modifyCustomer();
                    break;
                case '3':
                    deleteCustomer();
                    break;
                case '4':
                    listAllCustomers();
                    break;
                case '5':
                    System.out.print("确定是否退出 Y/N? :");
                    char selection2 = CMUtility.readConfirmSelection();// 判断是否退出
                    if (selection2 == 'Y') {
                        flag = false;
                    }
            }
        }
    }

    /**
     *
     * @Description添加客户
     * @author Gao
     * @date 2022年1月9日下午8:19:35
     */
    private void addNewCustomer() {
        System.out.println("---------------------添加客户---------------------");
        System.out.print("姓名:");
        String name = CMUtility.readString(4);
        System.out.print("性别:");
        char gender = CMUtility.readChar();
        System.out.print("年龄:");
        int age = CMUtility.readInt();
        System.out.print("电话:");
        String phone = CMUtility.readString(11);
        System.out.print("邮箱:");
        String email = CMUtility.readString(20);

        Customer customer = new Customer(name, gender, age, phone, email);
        boolean isOk = customerList.addCustomer(customer);
        if (isOk == true) {
            System.out.println("---------------------添加完成---------------------");
        } else {
            System.out.println("人数已达列表上限,添加失败!!!");
        }
    }

    /**
     *
     * @Description修改客户信息
     * @author Gao
     * @date 2022年1月9日下午8:19:28
     */
    private void modifyCustomer() {
        System.out.println("---------------------修改客户---------------------");
        Customer customer;
        int index;
        for (;;) {

            System.out.print("请选择修改客户编号(-1退出):");
            index = CMUtility.readInt();
            if (index == -1) {
                return;
            }
            customer = customerList.getCustomer(index - 1);// 用户眼中:index从 1开始
            if (customer == null) {
                System.out.print("无法找到指定客户!");
            } else {
                break;
            }
        }

        System.out.print("姓名(" + customer.getName() + "):");
        String name = CMUtility.readString(5, customer.getName());

        System.out.print("性别(" + customer.getGender() + "):");
        char gender = CMUtility.readChar(customer.getGender());

        System.out.print("年龄(" + customer.getAge() + "):");
        int age = CMUtility.readInt(customer.getAge());

        System.out.print("电话(" + customer.getPhone() + "):");
        String phone = CMUtility.readString(13, customer.getPhone());

        System.out.print("邮箱(" + customer.getEmail() + "):");
        String email = CMUtility.readString(15, customer.getEmail());

        Customer newcust = new Customer(name, gender, age, phone, email);
        boolean flag = customerList.replaceCustomer(index - 1, newcust);
        if (flag) {
            System.out.println("---------------------修改完成---------------------");
        } else {
            System.out.println("---------------------修改失败---------------------");
        }

    }

    /**
     *
     * @Description删除客户
     * @author Gao
     * @date 2022年1月9日下午8:19:24
     */
    private void deleteCustomer() {
        System.out.println("---------------------删除客户---------------------");
        Customer customer;
        int index;
        for (;;) {
            System.out.print("请选择待删除客户编号(-1退出):");
            index = CMUtility.readInt();
            if (index == -1) {
                return;
            }
            customer = customerList.getCustomer(index - 1);// 用户眼中:index从 1开始
            if (customer == null) {
                System.out.println("无法找到指定客户!");
            } else {
                break;
            }
        }

        // 找到相应的索引位置的customer后决定是否确认删除
        System.out.print("确认是否删除(Y/N):");
        char delete = CMUtility.readConfirmSelection();
        if (delete == 'Y') {
            boolean flag = customerList.deleteCustomer(index - 1);
            if (flag) {
                System.out.println("---------------------删除完成---------------------");
            } else {
                System.out.println("---------------------删除失败---------------------");
            }
        } else {
            return;
        }
    }

    /**
     *
     * @Description客户列表
     * @author Gao
     * @date 2022年1月9日下午8:17:38
     */
    private void listAllCustomers() {
        System.out.println("---------------------------客户列表---------------------------");
        int num = customerList.getTotal();// 获取当前用户数量
        if (num == 0) {
            System.out.println("没有客户记录!!!");
        } else {
            System.out.println("编号\t姓名\t性别\t年龄\t电话\t\t邮箱");
            Customer[] customers = customerList.getAllCustomer();// 获取所有客户对象
            for (int i = 0; i < num; i++) {
                Customer cust = customers[i];
                System.out.println((i + 1) + "\t" + cust.getName() + "\t" + cust.getGender() + "\t" + cust.getAge()
                        + "\t" + cust.getPhone() + "\t" + cust.getEmail());
            }

        }
        System.out.println("-------------------------客户列表完成-------------------------");
    }

    public static void main(String[] args) {
        CustomerView view = new CustomerView();
        view.enterMainMenu();//
    }

}
package model;

import java.util.Scanner;

public class CMUtility
{
    private static Scanner scanner = new Scanner(System.in);
    /**
     用于界面菜单的选择。该方法读取键盘,如果用户键入’1’-’5’中的任意字符,则方法返回。返回值为用户键入字符。
     */
    public static char readMenuSelection() {
        char c;
        for (; ; ) {
            String str = readKeyBoard(1, false);
            c = str.charAt(0);
            if (c != '1' && c != '2' &&
                    c != '3' && c != '4' && c != '5') {
                System.out.print("选择错误,请重新输入:");
            } else break;
        }
        return c;
    }
    /**
     从键盘读取一个字符,并将其作为方法的返回值。
     */
    public static char readChar() {
        String str = readKeyBoard(1, false);
        return str.charAt(0);
    }
    /**
     从键盘读取一个字符,并将其作为方法的返回值。
     如果用户不输入字符而直接回车,方法将以defaultValue 作为返回值。
     */
    public static char readChar(char defaultValue) {
        String str = readKeyBoard(1, true);
        return (str.length() == 0) ? defaultValue : str.charAt(0);
    }
    /**
     从键盘读取一个长度不超过2位的整数,并将其作为方法的返回值。
     */
    public static int readInt() {
        int n;
        for (; ; ) {
            String str = readKeyBoard(2, false);
            try {
                n = Integer.parseInt(str);
                break;
            } catch (NumberFormatException e) {
                System.out.print("数字输入错误,请重新输入:");
            }
        }
        return n;
    }
    /**
     从键盘读取一个长度不超过2位的整数,并将其作为方法的返回值。
     如果用户不输入字符而直接回车,方法将以defaultValue 作为返回值。
     */
    public static int readInt(int defaultValue) {
        int n;
        for (; ; ) {
            String str = readKeyBoard(2, true);
            if (str.equals("")) {
                return defaultValue;
            }

            try {
                n = Integer.parseInt(str);
                break;
            } catch (NumberFormatException e) {
                System.out.print("数字输入错误,请重新输入:");
            }
        }
        return n;
    }
    /**
     从键盘读取一个长度不超过limit的字符串,并将其作为方法的返回值。
     */
    public static String readString(int limit) {
        return readKeyBoard(limit, false);
    }
    /**
     从键盘读取一个长度不超过limit的字符串,并将其作为方法的返回值。
     如果用户不输入字符而直接回车,方法将以defaultValue 作为返回值。
     */
    public static String readString(int limit, String defaultValue) {
        String str = readKeyBoard(limit, true);
        return str.equals("")? defaultValue : str;
    }
    /**
     用于确认选择的输入。该方法从键盘读取‘Y’或’N’,并将其作为方法的返回值。
     */
    public static char readConfirmSelection() {
        char c;
        for (; ; )
        {
            String str = readKeyBoard(1, false).toUpperCase();
            c = str.charAt(0);
            if (c == 'Y' || c == 'N')
            {
                break;
            } else {
                System.out.print("选择错误,请重新输入:");
            }
        }
        return c;
    }

    private static String readKeyBoard(int limit, boolean blankReturn) {
        String line = "";

        while (scanner.hasNextLine()) {
            line = scanner.nextLine();
            if (line.length() == 0) {
                if (blankReturn) return line;
                else continue;
            }

            if (line.length() < 1 || line.length() > limit) {
                System.out.print("输入长度(不大于" + limit + ")错误,请重新输入:");
                continue;
            }
            break;
        }

        return line;
    }
}

 

package model;

import java.util.Scanner;

public class CMUtility
{
    private static Scanner scanner = new Scanner(System.in);
    /**
     用于界面菜单的选择。该方法读取键盘,如果用户键入’1’-’5’中的任意字符,则方法返回。返回值为用户键入字符。
     */
    public static char readMenuSelection() {
        char c;
        for (; ; ) {
            String str = readKeyBoard(1, false);
            c = str.charAt(0);
            if (c != '1' && c != '2' &&
                    c != '3' && c != '4' && c != '5') {
                System.out.print("选择错误,请重新输入:");
            } else break;
        }
        return c;
    }
    /**
     从键盘读取一个字符,并将其作为方法的返回值。
     */
    public static char readChar() {
        String str = readKeyBoard(1, false);
        return str.charAt(0);
    }
    /**
     从键盘读取一个字符,并将其作为方法的返回值。
     如果用户不输入字符而直接回车,方法将以defaultValue 作为返回值。
     */
    public static char readChar(char defaultValue) {
        String str = readKeyBoard(1, true);
        return (str.length() == 0) ? defaultValue : str.charAt(0);
    }
    /**
     从键盘读取一个长度不超过2位的整数,并将其作为方法的返回值。
     */
    public static int readInt() {
        int n;
        for (; ; ) {
            String str = readKeyBoard(2, false);
            try {
                n = Integer.parseInt(str);
                break;
            } catch (NumberFormatException e) {
                System.out.print("数字输入错误,请重新输入:");
            }
        }
        return n;
    }
    /**
     从键盘读取一个长度不超过2位的整数,并将其作为方法的返回值。
     如果用户不输入字符而直接回车,方法将以defaultValue 作为返回值。
     */
    public static int readInt(int defaultValue) {
        int n;
        for (; ; ) {
            String str = readKeyBoard(2, true);
            if (str.equals("")) {
                return defaultValue;
            }

            try {
                n = Integer.parseInt(str);
                break;
            } catch (NumberFormatException e) {
                System.out.print("数字输入错误,请重新输入:");
            }
        }
        return n;
    }
    /**
     从键盘读取一个长度不超过limit的字符串,并将其作为方法的返回值。
     */
    public static String readString(int limit) {
        return readKeyBoard(limit, false);
    }
    /**
     从键盘读取一个长度不超过limit的字符串,并将其作为方法的返回值。
     如果用户不输入字符而直接回车,方法将以defaultValue 作为返回值。
     */
    public static String readString(int limit, String defaultValue) {
        String str = readKeyBoard(limit, true);
        return str.equals("")? defaultValue : str;
    }
    /**
     用于确认选择的输入。该方法从键盘读取‘Y’或’N’,并将其作为方法的返回值。
     */
    public static char readConfirmSelection() {
        char c;
        for (; ; )
        {
            String str = readKeyBoard(1, false).toUpperCase();
            c = str.charAt(0);
            if (c == 'Y' || c == 'N')
            {
                break;
            } else {
                System.out.print("选择错误,请重新输入:");
            }
        }
        return c;
    }

    private static String readKeyBoard(int limit, boolean blankReturn) {
        String line = "";

        while (scanner.hasNextLine()) {
            line = scanner.nextLine();
            if (line.length() == 0) {
                if (blankReturn) return line;
                else continue;
            }

            if (line.length() < 1 || line.length() > limit) {
                System.out.print("输入长度(不大于" + limit + ")错误,请重新输入:");
                continue;
            }
            break;
        }

        return line;
    }
}

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