Java客户信息管理系统
好汤圆 人气:0一、目标
模拟实现一个基于文本界面的《客户信息管理软件》
进一步掌握编程技巧和调试技巧，熟悉面向对象编程
主要涉及以下知识点：
- 类结构的使用：属性、方法及构造器
- 对象的创建与使用
- 类的封装性
- 声明和使用数组
- 数组的插入、删除和替换
- 关键字的使用：this
二、系统结构设计
- CustomerView为主模块，负责菜单的显示和处理用户操作
- 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
三、键盘访问的实现
项目中提供了CMUtility.java类，可用来方便地实现键盘访问。
四、Customer类
Customer为实体类，用来封装客户信息
该类封装客户的以下信息：
- 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
提供各属性的get/set方法
提供所需的构造器（可自行确定）
五、CustomerList类
CustomerList为Customer对象的管理模块，内部使用数组管理一组Customer对象
本类封装以下信息：
Customer[] customers：用来保存客户对象的数组int total = 0：记录已保存客户对象的数量
该类至少提供以下构造器和方法：
public CustomerList(int totalCustomer)public boolean addCustomer(Customer customer)public boolean replaceCustomer(int index, Customer cust)public boolean deleteCustomer(int index)public Customer[] getAllCustomers()public Customer getCustomer(int index)public int getTotal()
六、CustomerView类
CustomerView为主模块，负责菜单的显示和处理用户操作
本类封装以下信息：
CustomerList customerList = new CustomerList(10);
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。
该类至少提供以下方法：
public void enterMainMenu()private void addNewCustomer()private void modifyCustomer()private void deleteCustomer()private void listAllCustomers()public static void main(String[] args)
七、代码
CMUtility类
package com.hsy.pack.project;
import java.util.Scanner;
/**
* 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;
}
}Customer类
package com.hsy.pack.project;
public class Customer {
private String name;
private char gender;
private int age;
private String phone;
private String email;
public Customer(String name, char gender, int age) {
this(name, gender, age, "", "");
}
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\t" + phone + "\t" + email;
}
}CustomerList类
package com.hsy.pack.project;
public class CustomerList {
private Customer[] customers;
private int total = 0;
public CustomerList(int totalCustomer) {
customers = new Customer[totalCustomer];
}
public boolean addCustomer(Customer customer) {
if (total >= customers.length) return false;
customers[total++] = customer;
return true;
}
public boolean replaceCustomer(int index, Customer cust) {
if (index < 0 || index >= total) return false;
customers[index] = cust;
return true;
}
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[] getAllCustomers() {
Customer[] custs = new Customer[total];
for (int i = 0; i < total; i++) {
custs[i] = customers[i];
}
return custs;
}
public int getTotal() {
return total;
}
public Customer getCustomer(int index) {
if (index < 0 || index >= total) return null;
return customers[index];
}
}CustomerView类
package com.hsy.pack.project;
public class CustomerView {
private CustomerList customers = new CustomerList(10);
public CustomerView() {
Customer cust = new Customer("张三", '男', 30, "010-56253825",
"abc@email.com");
customers.addCustomer(cust);
}
public void enterMainMenu() {
boolean loopFlag = true;
do {
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 key = CMUtility.readMenuSelection();
System.out.println();
switch (key) {
case '1':
addNewCustomer();
break;
case '2':
modifyCustomer();
break;
case '3':
deleteCustomer();
break;
case '4':
listAllCustomers();
break;
case '5':
System.out.print("确认是否退出(Y/N)：");
char yn = CMUtility.readConfirmSelection();
if (yn == 'Y')
loopFlag = false;
break;
}
} while (loopFlag);
}
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(15);
System.out.print("邮箱：");
String email = CMUtility.readString(15);
Customer cust = new Customer(name, gender, age, phone, email);
boolean flag = customers.addCustomer(cust);
if (flag) {
System.out
.println("---------------------添加完成---------------------");
} else {
System.out.println("----------------记录已满,无法添加-----------------");
}
}
private void modifyCustomer() {
System.out.println("---------------------修改客户---------------------");
int index = 0;
Customer cust = null;
for (; ; ) {
System.out.print("请选择待修改客户编号(-1退出)：");
index = CMUtility.readInt();
if (index == -1) {
return;
}
cust = customers.getCustomer(index - 1);
if (cust == null) {
System.out.println("无法找到指定客户！");
} else
break;
}
System.out.print("姓名(" + cust.getName() + ")：");
String name = CMUtility.readString(4, 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(15, cust.getPhone());
System.out.print("邮箱(" + cust.getEmail() + ")：");
String email = CMUtility.readString(15, cust.getEmail());
cust = new Customer(name, gender, age, phone, email);
boolean flag = customers.replaceCustomer(index - 1, cust);
if (flag) {
System.out
.println("---------------------修改完成---------------------");
} else {
System.out.println("----------无法找到指定客户,修改失败--------------");
}
}
private void deleteCustomer() {
System.out.println("---------------------删除客户---------------------");
int index = 0;
Customer cust = null;
for (; ; ) {
System.out.print("请选择待删除客户编号(-1退出)：");
index = CMUtility.readInt();
if (index == -1) {
return;
}
cust = customers.getCustomer(index - 1);
if (cust == 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 yn = CMUtility.readConfirmSelection();
if (yn == 'N')
return;
boolean flag = customers.deleteCustomer(index - 1);
if (flag) {
System.out.println("---------------------删除完成---------------------");
} else {
System.out.println("----------无法找到指定客户,删除失败--------------");
}
}
private void listAllCustomers() {
System.out.println("---------------------------客户列表---------------------------");
Customer[] custs = customers.getAllCustomers();
if (custs.length == 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\t邮箱");
for (int i = 0; i < custs.length; i++) {
System.out.println(i + 1 + "\t\t" + custs[i].getName() + "\t" + custs[i].getGender() + "\t\t" + custs[i].getAge() + "\t\t" + custs[i].getPhone() + "\t" + custs[i].getEmail());
}
}
System.out.println("-------------------------客户列表完成-------------------------");
}
public static void main(String[] args) {
CustomerView cView = new CustomerView();
cView.enterMainMenu();
}
}加载全部内容