Java项目案例之客户信息管理系统的实现
2021-07-23 11:41:23
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本篇文章将使用所学过的Java知识来实现一个简单的客户信息管理系统的小项目，下面内容是具体地实现过程，这篇文章供大家参考学习，希望能帮助到大家。
类图：
Customer类:
public class Customer {
/**
* @name 客户姓名
* @sex 性别
* @age 年龄
* @phone 电话号码
* @email 邮箱
*/
private String name;
private String sex;
private int age;
private String phone;
private String email;
public Customer(){};
public Customer(String name,String sex,int age,String phone,String email){
this.name=name;
this.sex=sex;
this.age=age;
this.phone=phone;
this.email=email;
}
public String getName(){
return this.name;
}
public void setName(String name){
this.name=name;
}
public String getSex(){
return this.sex;
}
public void setSex(String sex){
this.sex=sex;
}
public String getPhone(){
return phone;
}
public void setPhone(String phone){
this.phone=phone;
}
public int getAge(){
return this.age;
}
public void setAge(int age){
this.age=age;
}
public String getEmail(){
return this.email;
}
public void setEmail(String email){
this.email=email;
}
}
CustomerList 类:
public class CustomerList {
private Customer [] customers;
private static int total = 0;
/**
* 构造器初始化对象数组
* @param totalCustmoers 客户的总数
*/
public CustomerList(int totalCustmoers){
customers = new Customer[totalCustmoers];
}
/**
* 增加客户
* @param customer 客户
* @return 返回是否添加成功
*/
public boolean addCustomer(Customer customer){
if(customer!=null&&total<customers.length)
{customers[total]=customer;
total++;
return true;}
else
{ return false;}
}
/**
*替换
* @param index 指定的客户的编号
* @param cust 修改的客户
* @return 返回是否修改成功
*/
public boolean replaceCustomer(int index,Customer cust){
if(index>=0 && index <total )
{
customers[index]=cust;return true;
}
else
{
return false;
}
}
/**
*删除客户
* @param index 指定的客户的编号
* @return 返回是否删除成功
*/
public boolean deleteCustomer(int index){
if(index<customers.length)
{
for(int i=index;i<total-1;i++)
{
customers[i]=customers[i+1];/**把数据往前挪动*/
}
customers[total-1]=null;
total--;/**存储的数据的总数-1*/
return true;
}
else
{
return false;
}
}
/**
* 展现客户的信息
* @param index
* @return 返回客户
*/
public Customer getCustomer(int index){
if(index>=0 && index<total)
{return customers[index];}
else {
return null;
}
}
/**
* 获取所有的客户
* @return 客户
*/
public Customer[] getAllCustomers(){
Customer [] cust = new Customer[total];/**新建一个数组来接收原数组的数据*/
for(int i=0;i<total;i++){
cust[i]=customers[i];
}
return cust;
}
/**
* 得到客户的总数
* @return
*/
public int getTotal(){
return total;
}
}
CustomerVIew类:
public class CustomerView {
private CustomerList customerList = new CustomerList(10);
/**
* 显示主菜单
*/
public void enterMainMenu(){
while(true)
{System.out.println("-------------------客户信息管理软件-------------------");
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("-----------------------------------------------------");
Scanner input = new Scanner(System.in);
int op = input.nextInt();
switch(op)
{
case 1 :this.addNewCustomer();break;
case 2 :this.modifyCustomer();break;
case 3 :this.deleteCustomer();break;
case 4 :this.listAllCustomers();break;
case 5 :System.exit(0);break;
default:
System.out.println("重新选择功能");break;
}
}
}
/**
* 增加客户
*/
private void addNewCustomer(){
/**
* 从键盘处接收客户数据
*/
System.out.println("-------------------添加客户-------------------");
Scanner input = new Scanner(System.in);
System.out.println("姓名:");
String name = input.next();
System.out.println("性别:");
String sex=input.next();
System.out.println("年龄:");
int age = input.nextInt();
System.out.println("电话号码:");
String phone = input.next();
System.out.println("电子邮箱:");
String email = input.next();
/**
* 对客户数据进行封装
*/
Customer person = new Customer(name,sex,age,phone,email);
Boolean flag=customerList.addCustomer(person);
if(flag)
{
System.out.println("-------------------添加成功-------------------");
}
else
{
System.out.println("-------------------添加失败-------------------");
}
}
/**
* 修改客户信息
*/
private void modifyCustomer(){
System.out.println("-------------------修改客户-------------------");
System.out.println("要修改的客户id:");
Scanner input = new Scanner(System.in);
int number = input.nextInt();
Customer customer = customerList.getCustomer(number);
System.out.println("姓名:"+customer.getName());
String name = CMUtility.readString(5,customer.getName());
System.out.println("性别:"+customer.getSex());
String sex = CMUtility.readString(5,customer.getSex());
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());
/**得到新的客户数据*/
customer = new Customer(name,sex,age,phone,email);
Boolean flag = customerList.replaceCustomer(number,customer);
if(flag)
{
System.out.println("-------------------修改成功-------------------");
}
else
{
System.out.println("-------------------修改失败-------------------");
}
}
/**
* 删除客户
*/
private void deleteCustomer(){
System.out.println("-------------------删除客户-------------------");
System.out.println("要删除的客户id:");
Scanner input = new Scanner(System.in);
int number = input.nextInt();
while(true){
System.out.println("退出(-1)");
if(number>=0 && number<customerList.getTotal())
{
System.out.println("找到指定客户");
}
else if(number==-1)
{
return;
}
else
{
System.out.println("输入错误");break;
}}
System.out.println("是否确认删除该客户?Y/N");
String ch = input.next();
char o = ch.charAt(0);
if(o=='Y')
{
boolean flag = customerList.deleteCustomer(number);
if(flag){
System.out.println("-------------------删除成功-------------------");
}
else
{
System.out.println("-------------------删除失败-------------------");
}
}
else{
return;
}
}
/**
* 获取客户列表
*/
private void listAllCustomers(){
Customer [] customer=customerList.getAllCustomers();
if(customer.length==0)
{
System.out.println("没有任何客户数据");
}
else{
for(int i=0;i< customer.length;i++)
{
System.out.println("姓名:"+customer[i].getName()+" "+"性别"+customer[i].getSex()+" "+"年龄:"+customer[i].getAge()+" "+"电话号码:"+customer[i].getPhone()+" "+"电子邮箱:"+customer[i].getEmail()+" ");
}
}}
public static void main(String[] args) {
CustomerView co = new CustomerView();
co.enterMainMenu();
}
}
工具类：
public class CMUtility {
private static Scanner scanner = new Scanner(System.in);
public static String readString(int limit) {
return readKeyBoard(limit, false);
}
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;
}
总结
到此这篇关于使用 Java 实现一个简单的客户信息管理系统的小项目的文章就介绍到此结束了，想要了解相关 Java 项目应用的其他内容请搜索W3Cschool以前的文章或继续浏览下面的相关文章，也希望大家以后多多支持我们！