客户信息管理软件
模拟实现基于文本界面的《客户信息管理软件》。
该软件由以下三个模块组成
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
该软件能够实现对客户对象的插入、修改和删除(用数组实现)，并能够打印客户明细表。项目采用分级菜单方式。
主菜单如下:
项目结构
com.klvchen.p2.bean 包
Customer.java
package com.klvchen.p2.bean;
/**
* Customer为实体对象，用来封装客户信息
* @author Administrator
*
*/
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;
}
}
com.klvchen.p2.service 包
CustomerList.java
package com.klvchen.p2.service;
import com.klvchen.p2.bean.Customer;
/**
* CustomerList 为 Customer对象的管理模块
* @author Administrator
*
*/
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
// 初始化 customers 数组的构造器，totalCustomer 指定数组的长度
public CustomerList(int totalCustomer) {
customers = new Customer[totalCustomer];
}
// 将指定的客户添加到数组中
public boolean addCustomer(Customer customer) {
if(total >= customers.length) {
return false;
}
customers[total] = customer;
total++;
return true;
}
// 修改指定索引位置上的客户
public boolean replaceCustomer(int index, Customer cust) {
if(index < 0 || index >= total) {
return false;
}
customers[index] = cust;
return true;
}
// 删除指定索引位置上的客户
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];
}
//最后有数据的元素需要置空
customers[total - 1] = null;
total--;
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];
}
// 获取存储的客户数量
public int getTotal() {
return total;
}
}
com.klvchen.p2.ui 包
CustomerView.java
package com.klvchen.p2.ui;
import com.klvchen.p2.bean.Customer;
import com.klvchen.p2.service.CustomerList;
import com.klvchen.p2.util.CMUtility;
/**
* CustomerView为主模块，负责菜单的显示和处理用户操作
* @author Administrator
*
*/
public class CustomerView {
private CustomerList customerList = new CustomerList(10);
public CustomerView() {
Customer customer = new Customer("陈先生", '男', 23, "135353535", "kl@gmail.com");
customerList.addCustomer(customer);
}
// 显示《客户信息管理软件》
public void enterMainMenu() {
boolean isFlag = true;
while(isFlag) {
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 menu = CMUtility.readMenuSelection();
switch(menu) {
case '1':
addNewCustomer();
break;
case '2':
modifyCustomer();
break;
case '3':
deleteCustomer();
break;
case '4':
listAllCustomer();
break;
case '5':
System.out.println("确认是否退出(Y/N)");
char isExit = CMUtility.readConfirmSelection();
if(isExit == 'Y') {
isFlag = false;
}
}
}
}
public void addNewCustomer() {
System.out.println("--------------------添加客户--------------------");
System.out.println("姓名: ");
String name = CMUtility.readString(10);
System.out.println("性别: ");
char gender = CMUtility.readChar();
System.out.println("年龄: ");
int age = CMUtility.readInt();
System.out.println("电话: ");
String phone = CMUtility.readString(13);
System.out.println("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--------------------");
}
}
public void modifyCustomer() {
System.out.println("--------------------修改客户--------------------");
Customer cust;
int number;
for(;;) {
System.out.println("请选择修改客户编号(-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 isReplaced = customerList.replaceCustomer(number - 1, newCust);
if(isReplaced) {
System.out.println("--------------------修改完成--------------------");
}else {
System.out.println("--------------------修改失败--------------------");
}
}
public 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;
}
}
//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;
}
}
public void listAllCustomer() {
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 < 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 cv = new CustomerView();
cv.enterMainMenu();
}
}
com.klvchen.p2.util 包
CMUtility.java
package com.klvchen.p2.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;
}
}
测试结果:
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