目录
软件设计：
CustomerView模块
CustomerList模块
Customer模块
CMUtility工具包
软件设计：
该软件由以下三个模块组成：
CustomerView为主模块，负责菜单的显式和处理用户操作。
CustomerList为Customer对象的管理模块，内部用数组管理一组Customer对象，并提供相应的添加、修改、删除和遍历方法，供CustomerView调用
Customer为实体对象，用来封装客户信息
CustomerView模块
package com.atguigu.p2.ui;
import com.atguigu.p2.bean.Customer;
import com.atguigu.p2.service.CustomerList;
import com.atguigu.p2.util.CMUtility;
public class CustomerView {
private CustomerList customerList = new CustomerList(10);
public CustomerView() {
Customer customer = new Customer("王涛", '男', 23, "13212312312", "wt@gmail.com");
customerList.addCustomer(customer);
}
/*
* 显示软件管理界面
*/
public void enterMainMenu() {
boolean isFlag = true;
while(isFlag) {
System.out.println("-----------------------客户信息管理软件--------------------");
System.out.println();
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");
System.out.println();
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("退出");
System.out.print("确认是否退出(Y/N):");
char isExit = CMUtility.readConfirmSelection();
if(isExit == 'Y') {
isFlag = false;
}
}
}
}
/*
* 添加客户
*/
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);
//将上述数据封装到对象中
Customer customer = new Customer(name,gender,age,phone,email);
boolean isSuccess = customerList.addCustomer(customer);
if(isSuccess) {
System.out.println("-----------------------添加完成--------------------");
}else {
System.out.println("-----------------------客户目录已满，添加失败---------------------");
}
}
/*
* 修改客户信息模块
*/
private void modifyCustomer() {
System.out.println("-----------------------修改客户--------------------");
Customer cust;
int number;
for(;;) {
System.out.println("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.println("无法找到指定的客户！");
}else {//找到了相应编号的客户
break;
}
}
//修改客户信息
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--------------------");
}
}
/*
* 删除客户
*/
private void deleteCustomer() {
System.out.println("-----------------------删除客户--------------------");
int number;
for(;;) {
System.out.print("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("无法找到客户！");
}else {
break;
}
}
//找到了指定的客户
System.out.println("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;
}
}
/*
* 显示客户列表
*/
private void listAllCustomers() {
System.out.println("---------------------------客户列表---------------------------/n");
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 < custs.length;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();
}
}CustomerList模块
package com.atguigu.p2.service;
import com.atguigu.p2.bean.Customer;
public class CustomerList {
private Customer[] customers;//用来保存客户对象的数组
private int total;//记录已保存客户对象的数量
/*
* 用来初始化customers数组
* totalCustomer：指定customers数组的最大空间
*/
public CustomerList(int totalCustomer) {
customers = new Customer[totalCustomer];
}
/*
* 將指定的客戶添加到數組中
*/
public boolean addCustomer(Customer customer) {
if(total >= customers.length) {
return false;
}
customers[total++] = customer;
return true;
}
/*
* 修改指定索引位置的客戶信息
*/
public boolean replaceCustomer(int index, Customer cust) {
if(index < 0 || index >= total) {
return false;
}
customers[index] = cust;
return true;
}
/*
* 刪除指定索引位置上的客戶
*/
public boolean deleteCustomer(int index) {
if(index < 0 || index >= total) {
return false;
}
for(int i = index;i < total;i++) {
customers[i] = customers[i + 1];
}
//最后有数据的元素需要置空
customers[--total] = null;
return true;
}
/*
* 获取所有的客户信息
*/
public Customer[] getAllCustomers() {
Customer[] custs = new Customer[total];
for(int i = 0;i < total;i++) {
custs[i] = customers[i];
}
return custs;
}
/*
* 获取指定索引位置上的客户
*/
public Customer getCustomer(int index) {
if(index < 0 || index >= total) {
return null;
}
return customers[index];
}
/*
* 获取存储的客户的数量
*/
public int getTotal() {
return total;
}
}Customer模块
package com.atguigu.p2.bean;
public class Customer {
String name;//客户姓名
char gender;//性别
int age;//年龄
String phone;//电话号码
String email;//电子邮箱
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 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;
}
}CMUtility工具包
CMUtility工具包可以将不同的功能封装为方法
package com.atguigu.p2;
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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