这篇文章主要为大家详细介绍了java实现客户信息管理系统,文中示例代码介绍的非常详细,具有一定的参考价值,感兴趣的小伙伴们可以参考一下
本文实例为大家分享了java实现客户信息管理系统的具体代码,供大家参考,具体内容如下
一、CMUtility工具类
讲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。
代码如下:package com.p2.util;
import java.util.*;
/**
* 工具类
* 讲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。
* 返回值为用户选择的数字。
**/
public static char readMenuSelection(){
char c;
for (; ; ){
String str = readaKeyBoard(1, false);
c = str.charAt(0);
if (c != '1' && c!= '2' && c!= '3' && c!= '4'
&& c!= '5'){
System.out.println("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 = readaKeyBoard(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 = readaKeyBoard(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 = readaKeyBoard(2, false);
try{
n = Integer.parseInt(str);
break;
}catch(NumberFormatException e){
System.out.println("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 = readaKeyBoard(2, true);
if (str.equals("")){
return defaultValue;
}
try{
n = Integer.parseInt(str);
break;
}catch(NumberFormatException e){
System.out.println("数字输入错误,请重新输入:");
}
}
return n;
}
/**
* 从键盘 读取一个长读不超过limit的字符串,并将其作为方法的返回值。
**/
public static String readString (int limit){
return readaKeyBoard(limit,false);
}
public static String readString (int limit, String defaultValue){
return readaKeyBoard(limit,false);
}
/**
* 从键盘读取一个疮毒不超过limit的字符串,将其作为方法的返回值。
* 如果用户不输入字符而直接回车,方法以defaultValue作为返回值。
**/
public static char readComfirmSelection(){
char c;
for (; ; ){
String str = readaKeyBoard(1, false).toUpperCase();
c = str.charAt(0);
if (c == 'Y' || c == 'N'){
break;
}else{
System.out.println("选择错误,请重新输入:");
}
}
return c;
}
private static String readaKeyBoard(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.println("输入长度(不大于" + limit + ")错误,请重新输入:");
continue;
}
break;
}
return line;
}
} 二、Customer
代码如下:package com.p2.bean;
/**
* 把对象封装到方法里面
*
*
**/
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
//构造器
//方法(封装)
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 Customer() {
}
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;
}
} 三、CustomerList
代码如下:package com.p2.service;
/**
* 最主要的
*
**/
import com.p2.bean.Customer;
public class CustomerList {
private Customer[] customers;
private int total = 0;
//构造器
/**
* 用来初始化customers数组的构造器
* @param totalCustomer: 指定数组的长度
**/
public CustomerList (int totalCustomer){//给正在创建的对象进行初始化
customers = new Customer[totalCustomer];
}
//方法
/**
* 将指定的客户添加到数组中
* @param customer
* @return成功true,失败:false
**/
public boolean addCustomer(Customer customer){//增
if(total < 0 || total >= customers.length){
return false;
}
customers[total++] = customer;
return true;
}
/**
* 修改指定位置的客户信息
* @param index
* @param cust
* @return
**/
public boolean replaceCustomer(int index, Customer cust){//改
if(index <0 || index >= total){
return false;
}
customers[index] = cust;
return true;
}
/**
* 删除指定位置上的客户
* @param index
* @return
**/
public boolean deleteCustsomer(int index){//删除
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 --;
customers[-- total] = null;
return true;
}
/**
* 获得所有的客户信息
* @return
**/
public Customer[] getAllCustomers() {//查询所有
Customer[] custs = new Customer[total];
for(int i = 0; i < total; i++){
custs[i] = customers[i];
}
return custs;
}
/**
* 获取指定位置上的客户信息
* @param index
* @return
**/
public Customer getCustomer(int index) {//查询一个
if(index < 0 || index >= total){
return null;
}
return customers[index];
}
//封装
/**
* 获取存储客户的的数量
* @return
**/
public int getTotal() {//统计数据
return total;
}
} 四、CustomerView
代码如下:package com.p2.ui;
import com.p2.bean.Customer;
import com.p2.service.CustomerList;
import com.p2.util.CMUtility;
/**
*
* 用户交互
*
*
*
**/
public class CustomerView {
private CustomerList customerList = new CustomerList(100);
public CustomerView(){
Customer customer = new Customer("王涛",'男', 23, "13213123","wt@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--------");
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':
listAllCustomers();
break;
case '5':
// System.out.println("退出");
System.out.println("确认是否退出(Y/N):");
char isExit = CMUtility.readComfirmSelection();
if(isExit =='Y'){
isFlag = false;
}
// break;
}
// 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 isSucccess = customerList.addCustomer(customer);
if(isSucccess){
System.out.println("------添加完成------");
}else{
System.out.println("------客户已满------");
}
}
/**
* 修改客户
**/
private void modifyCustomer(){
System.out.println("---------修改客户-------");
Customer cust;
int number;
for(;;){
System.out.print("选择要修改的客户编号(-1退出):");
number = CMUtility.readInt();
if (number == -1){
return;
}else{
cust = customerList.getCustomer(number - 1);
if(cust == null){
System.out.println("无法找到指定客户!!");
}else{//找到相应的客户
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("修改成功!!");
}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("请选择呆删除客户的编号(-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;
}
}
//找到客户了
System.out.println("是否确认删除(Y/N):");
char isDelete = CMUtility.readComfirmSelection();
if(isDelete == 'Y'){
boolean deleteSuccess = customerList.deleteCustsomer(number - 1);
if(deleteSuccess ){
System.out.println("-----------删除成功---------");
}else{
System.out.println("-----------删除失败---------");
}
}else{
return;
}
}
/**
* 显示客户列表
**/
private void listAllCustomers(){
// System.out.println("显示客户");
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("---------客户列表结束-------");
}
public static void main(String[] args) {
CustomerView view = new CustomerView();
view.enterMainMenu();
}
} 五、运行结果
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持CodeAE代码之家。
原文链接:https://blog.csdn.net/xue3236522091/article/details/113799144
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