项目二 客户信息管理软件 复习
package top.qaqaq.java.P259.bean;

/**
 * 
 * @Description Customer为实体类,用来封装客户信息
 * @author RichieZhang Email:18358892@qq.com
 * @version
 * @date 2022年10月4日下午5:08:49
 *
 */
public class Customer {

	private String name; // 客户姓名
	private char gender; // 性别
	private int age; // 年龄
	private String phone; // 电话号码
	private String email; // 电子邮件

	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;
	}
	
	public String getDetails() {
		return name + "\t" + gender + "\t" + age + "\t" + phone + "\t" + email;
	}

//	public static void main(String[] args) {
//		Customer cust = new Customer("张三", '男', 23, "12323233232", "12323233232@qq.com");
//		System.out.println("姓名:" + cust.getName() + ", 性别:" + cust.getGender() + ", 年龄:" + cust.getAge() + ", 电话号码:" + cust.getPhone() + ", 电子邮件:" + cust.getEmail());
//	}

}
package top.qaqaq.java.P259.seriver;

import top.qaqaq.java.P259.bean.Customer;

/**
 * 
 * @Description CustomerList为Customer对象的管理模块,
 *              内部使用数组管理一组Customer对象,并提供相应的添加、修改、删除和遍历方法, 供CustomerView调用
 * @author RichieZhang Email:18358892@qq.com
 * @version
 * @date 2022年10月4日下午5:09:25
 *
 */
public class CustomerList {

	private Customer[] customers; // 用来保存客户对象的数组
	private int total = 0; // 记录已保存客户对象的数量

	/**
	 * 用来初始化customers数组的构造器
	 * 
	 * @param totalCustomer 指定数组的长度
	 */
	public CustomerList(int totalCustomer) {

		customers = new Customer[totalCustomer];
	}

	/**
	 * 
	 * @Description 将指定的客户添加到数组中
	 * @author RichieZhang
	 * @date 2022年10月4日下午5:11:59
	 * @param customer
	 * @return true:添加成功 falst:添加失败
	 */
	public boolean addCustomer(Customer customer) {

		if (total >= customers.length) {
			return false;
		}

		customers[total++] = customer;
		return true;
	}

	/**
	 * 
	 * @Description 修改指定索引位置的客户信息
	 * @author RichieZhang
	 * @date 2022年10月4日下午5:12:29
	 * @param index
	 * @param cust
	 * @return true:修改成功 false:修改失败
	 */
	public boolean replaceCustomer(int index, Customer cust) {

		if (index < 0 || index >= total) {
			return false;
		}

		customers[index] = cust;
		return true;
	}

	/**
	 * 
	 * @Description 删除指定索引位置上的客户
	 * @author RichieZhang
	 * @date 2022年10月4日下午5:12:54
	 * @param index
	 * @return true:删除成功 false:删除失败
	 */
	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;
	}

	/**
	 * 
	 * @Description 获取所有的客户信息
	 * @author RichieZhang
	 * @date 2022年10月4日下午5:13:14
	 * @return
	 */
	public Customer[] getAllCustomers() {

		Customer custs[] = new Customer[total];
		for (int i = 0; i < total; i++) {
			custs[i] = customers[i];
		}

		return custs;
	}

	/**
	 * 
	 * @Description 获取指定索引位置上的客户
	 * @author RichieZhang
	 * @date 2022年10月4日下午5:13:36
	 * @param index
	 * @return 如果找到了元素,则返回;如果没有找到,则返回null
	 */
	public Customer getCustomer(int index) {

		if (index < 0 || index >= total) {
			return null;
		}

		return customers[index];
	}

	/**
	 * 
	 * @Description 获取存储的客户的数量
	 * @author RichieZhang
	 * @date 2022年10月4日下午5:13:51
	 * @return
	 */
	public int getTotal() {

		return total;

	}

//	public static void main(String[] args) {
//		CustomerList custs = new CustomerList(5);
//		
//		Customer customer = new Customer();
//		Customer customer1 = new Customer("张三", '男', 23, "12323233232", "12323233232@qq.com");
//		Customer customer2 = new Customer("李四", '男', 23, "12323233232", "12323233232@qq.com");
//		Customer customer3 = new Customer("王五", '男', 23, "12323233232", "12323233232@qq.com");
//		Customer customer4 = new Customer("老六", '男', 23, "12323233232", "12323233232@qq.com");
//		Customer customer5 = new Customer("莱七", '男', 23, "12323233232", "12323233232@qq.com");
//		custs.addCustomer(customer1);
//		custs.addCustomer(customer2);
//		custs.addCustomer(customer3);
//		custs.addCustomer(customer4);
//		custs.addCustomer(customer5);
//
//		for (int i = 0; i < custs.total; i++) {
//			System.out.println(custs.customers[i].getDetails());
//		}
//		
//		System.out.println("有" + custs.getTotal() + "个客户");
//		System.out.println("******************************************");
//		
//		Customer test = new Customer("你好", '男', 23, "12323233232", "12323233232@qq.com");
//		
//		custs.replaceCustomer(3, test);
//		for (int i = 0; i < custs.total; i++) {
//			System.out.println(custs.customers[i].getDetails());
//		}
//		System.out.println("******************************************");
//		
//		custs.deleteCustomer(2);
//		for (int i = 0; i < custs.total; i++) {
//			System.out.println(custs.customers[i].getDetails());
//		}
//		System.out.println("******************************************");
//		
//		System.out.println(custs.getCustomer(3).getDetails());
//		System.out.println("******************************************");
//		
//		System.out.println("有" + custs.getTotal() + "个客户");
//		System.out.println("******************************************");
//		
//		System.out.println(custs.getAllCustomers());
//
//	}

}
package top.qaqaq.java.P259.ui;

import top.qaqaq.java.P259.bean.Customer;
import top.qaqaq.java.P259.seriver.CustomerList;
import top.qaqaq.java.P259.util.CMUtility;

/**
 * 
 * @Description CustomerView为主模块,负责菜单的显式和处理用户操作
 * @author RichieZhang Email:18358892@qq.com
 * @version
 * @date 2022年10月4日下午8:25:45
 *
 */
public class CustomerView {

	CustomerList customerList = new CustomerList(10);

	public CustomerView() {
		Customer customer = new Customer("王涛", '男', 23, "13212341234", "wt@gmail.com");
		customerList.addCustomer(customer);
	}

	/**
	 * 
	 * @Description 显示《客户信息管理软件》界面的方法
	 * @author RichieZhang
	 * @date 2022年10月4日下午8:26:03
	 */
	public void enterMainMenu() {

		boolean isFlag = true;

		while (isFlag) {
			System.out.println("-----------------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 menu = CMUtility.readMenuSelection();
			switch (menu) {

			case '1':
				addNewCustomer();
				break;

			case '2':
				modifyCustomer();
				break;

			case '3':
				deleteCustomer();
				break;

			case '4':
				listAllCustomers();
				break;

			case '5':
				System.out.println("确认是否退出(Y/N):");
				char isExit = CMUtility.readConfirmSelection();
				if (isExit == 'Y') {
					isFlag = false;
				}

//				break;
			}
		}

	}

	/**
	 * 
	 * @Description 添加客户的操作
	 * @author RichieZhang
	 * @date 2022年10月4日下午8:26:27
	 */
	private void addNewCustomer() {

		System.out.println("---------------------添加客户---------------------");

		System.out.print("姓名:");
		String name = CMUtility.readString(10);
		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(13);
		System.out.print("邮箱:");
		String email = CMUtility.readString(30);

		Customer customer = new Customer(name, gender, age, phone, email);

		boolean isSussess = customerList.addCustomer(customer);
		if (isSussess) {
			System.out.println("---------------------添加完成---------------------");
		} else {
			System.out.println("----------------客户目录已满,添加失败----------------");
		}
	}

	/**
	 * 
	 * @Description 修改客户的操作
	 * @author RichieZhang
	 * @date 2022年10月4日下午8:26:47
	 */
	private void modifyCustomer() {

		System.out.println("---------------------修改客户---------------------");

		Customer cust;
		int number;

		for (;;) {
			System.out.print("请选择待修改客户编号(-1退出):");
			number = CMUtility.readInt();
			if (number == -1) {
				return;
			}

			cust = customerList.getCustomer(number - 1);

			if (cust == null) {
				System.out.print("无法找到指定客户!");
			} else {
				break;
			}
		}

		System.out.print("姓名(" + cust.getName() + "):");
		String name = CMUtility.readString(10, cust.getName());
		System.out.print("性别(" + cust.getGender() + "):");
		char gender = CMUtility.readChar(cust.getGender());
		System.out.print("年龄(" + cust.getAge() + "):");
		int age = CMUtility.readInt(cust.getAge());
		System.out.print("电话(" + cust.getPhone() + "):");
		String phone = CMUtility.readString(13, cust.getPhone());
		System.out.print("邮箱(" + cust.getEmail() + "):");
		String email = CMUtility.readString(30, cust.getEmail());

		Customer newCust = new Customer(name, gender, age, phone, email);

		boolean isRepalaced = customerList.replaceCustomer(number - 1, newCust);
		if (isRepalaced) {
			System.out.println("---------------------修改完成---------------------");
		} else {
			System.out.println("---------------------修改失败---------------------");
		}
	}

	/**
	 * 
	 * @Description 删除客户的操作
	 * @author RichieZhang
	 * @date 2022年10月4日下午8:26:59
	 */
	private void deleteCustomer() {

		System.out.println("---------------------删除客户---------------------");

		int number;
		for (;;) {
			System.out.println("请选择待删除客户编号(-1退出):");
			number = CMUtility.readInt();

			if (number == -1) {
				return;
			}

			Customer customer = customerList.getCustomer(number - 1);

			if (customer == null) {
				System.out.println("无法找到指定客户!");
			} else {
				break;
			}

		}
		
		System.out.print("确认是否删除(Y/N):");
		char isDelete = CMUtility.readConfirmSelection();
		if (isDelete == 'Y') {
			boolean deleteSuccess = customerList.deleteCustomer(number - 1);
			if (deleteSuccess) {
				System.out.println("---------------------删除完成---------------------");
			} else {
				System.out.println("---------------------删除失败---------------------");
			}
		} else {
			return;
		}

	}

	/**
	 * 
	 * @Description 显示客户列表的操作
	 * @author RichieZhang
	 * @date 2022年10月4日下午8:27:14
	 */
	private void listAllCustomers() {

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

		int total = customerList.getTotal();
		if (total == 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[] custs = customerList.getAllCustomers();
			for (int i = 0; i < total; i++) {
				Customer cust = custs[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 top.qaqaq.java.P259.util;


import java.util.*;
/**
CMUtility工具类:
将不同的功能封装为方法,就是可以直接通过调用方法使用它的功能,而无需考虑具体的功能实现细节。
*/
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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