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;
}
}