本篇文章將使用所學過的Java知識來實現(xiàn)一個簡單的客戶信息管理系統(tǒng)的小項目，下面內(nèi)容是具體地實現(xiàn)過程，這篇文章供大家參考學習，希望能幫助到大家。
類圖：
Customer類:
public class Customer {
/**
* @name 客戶姓名
* @sex 性別
* @age 年齡
* @phone 電話號碼
* @email 郵箱
*/
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 類:
public class CustomerList {
private Customer [] customers;
private static int total = 0;
/**
* 構造器初始化對象數(shù)組
* @param totalCustmoers 客戶的總數(shù)
*/
public CustomerList(int totalCustmoers){
customers = new Customer[totalCustmoers];
}
/**
* 增加客戶
* @param customer 客戶
* @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;}
}
/**
*替換
* @param index 指定的客戶的編號
* @param cust 修改的客戶
* @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;
}
}
/**
*刪除客戶
* @param index 指定的客戶的編號
* @return 返回是否刪除成功
*/
public boolean deleteCustomer(int index){
if(index<customers.length)
{
for(int i=index;i<total-1;i++)
{
customers[i]=customers[i+1];/**把數(shù)據(jù)往前挪動*/
}
customers[total-1]=null;
total--;/**存儲的數(shù)據(jù)的總數(shù)-1*/
return true;
}
else
{
return false;
}
}
/**
* 展現(xiàn)客戶的信息
* @param index
* @return 返回客戶
*/
public Customer getCustomer(int index){
if(index>=0 && index<total)
{return customers[index];}
else {
return null;
}
}
/**
* 獲取所有的客戶
* @return 客戶
*/
public Customer[] getAllCustomers(){
Customer [] cust = new Customer[total];/**新建一個數(shù)組來接收原數(shù)組的數(shù)據(jù)*/
for(int i=0;i<total;i++){
cust[i]=customers[i];
}
return cust;
}
/**
* 得到客戶的總數(shù)
* @return
*/
public int getTotal(){
return total;
}
}
CustomerVIew類:
public class CustomerView {
private CustomerList customerList = new CustomerList(10);
/**
* 顯示主菜單
*/
public void enterMainMenu(){
while(true)
{System.out.println("-------------------客戶信息管理軟件-------------------");
System.out.println("1 "+"添加客戶");
System.out.println("2 "+"修改客戶");
System.out.println("3 "+"刪除客戶");
System.out.println("4 "+"客戶列表");
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("重新選擇功能");break;
}
}
}
/**
* 增加客戶
*/
private void addNewCustomer(){
/**
* 從鍵盤處接收客戶數(shù)據(jù)
*/
System.out.println("-------------------添加客戶-------------------");
Scanner input = new Scanner(System.in);
System.out.println("姓名:");
String name = input.next();
System.out.println("性別:");
String sex=input.next();
System.out.println("年齡:");
int age = input.nextInt();
System.out.println("電話號碼:");
String phone = input.next();
System.out.println("電子郵箱:");
String email = input.next();
/**
* 對客戶數(shù)據(jù)進行封裝
*/
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("-------------------添加失敗-------------------");
}
}
/**
* 修改客戶信息
*/
private void modifyCustomer(){
System.out.println("-------------------修改客戶-------------------");
System.out.println("要修改的客戶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("性別:"+customer.getSex());
String sex = CMUtility.readString(5,customer.getSex());
System.out.print("年齡(" + customer.getAge() + "):");
int age = CMUtility.readInt(customer.getAge());
System.out.print("電話(" + customer.getPhone() + "):");
String phone = CMUtility.readString(13, customer.getPhone());
System.out.print("郵箱(" + customer.getEmail() + "):");
String email = CMUtility.readString(15, customer.getEmail());
/**得到新的客戶數(shù)據(jù)*/
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("-------------------修改失敗-------------------");
}
}
/**
* 刪除客戶
*/
private void deleteCustomer(){
System.out.println("-------------------刪除客戶-------------------");
System.out.println("要刪除的客戶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("找到指定客戶");
}
else if(number==-1)
{
return;
}
else
{
System.out.println("輸入錯誤");break;
}}
System.out.println("是否確認刪除該客戶?Y/N");
String ch = input.next();
char o = ch.charAt(0);
if(o=='Y')
{
boolean flag = customerList.deleteCustomer(number);
if(flag){
System.out.println("-------------------刪除成功-------------------");
}
else
{
System.out.println("-------------------刪除失敗-------------------");
}
}
else{
return;
}
}
/**
* 獲取客戶列表
*/
private void listAllCustomers(){
Customer [] customer=customerList.getAllCustomers();
if(customer.length==0)
{
System.out.println("沒有任何客戶數(shù)據(jù)");
}
else{
for(int i=0;i< customer.length;i++)
{
System.out.println("姓名:"+customer[i].getName()+" "+"性別"+customer[i].getSex()+" "+"年齡:"+customer[i].getAge()+" "+"電話號碼:"+customer[i].getPhone()+" "+"電子郵箱:"+customer[i].getEmail()+" ");
}
}}
public static void main(String[] args) {
CustomerView co = new CustomerView();
co.enterMainMenu();
}
}
工具類：
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("數(shù)字輸入錯誤，請重新輸入：");
}
}
return n;
}
總結
到此這篇關于使用 Java 實現(xiàn)一個簡單的客戶信息管理系統(tǒng)的小項目的文章就介紹到此結束了，想要了解相關 Java 項目應用的其他內(nèi)容請搜索W3Cschool以前的文章或繼續(xù)瀏覽下面的相關文章，也希望大家以后多多支持我們！
