JAVA---客户信息管理软件
CMUtility.java文件
package 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;
}
}
Customer.java文件
package bean;
public class Customer {
private String name;
private char gender;
private int age;
private String phone;
private String 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;
}
public void setName(String name){
this.name=name;
}
public String getName(){
return this.name;
}
public void setGender(char gender){
this.gender=gender;
}
public char getGender(){
return this.gender;
}
public void setAge(int age){
this.age=age;
}
public int getAge(){
return this.age;
}
public void setPhone(String phone){
this.phone=phone;
}
public String getPhone(){
return this.phone;
}
public void setEmail(String email){
this.email=email;
}
public String getEmail(){
return this.email;
}
}
CustomerList.java文件
package service;
import bean.Customer;
public class CustomerList {
private Customer[] customers;//用来保存客户对象的数组
private int total=0;//记录已保存客户对象的数量
/**
* 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){
customers=new Customer[totalCustomer];
}
/**
* 将指定的客户添加到数组中
* @param customer 客户对象
* @return true：添加成功 false：添加失败
*/
public boolean addCustomer(Customer customer){
if(total>=customers.length){
return false;
}
customers[total++]=customer;
return true;
}
/**
* 修改指定索引位置的客户信息
* @param index
* @param cust
* @return true：修改成功 false：修改失败
*/
public boolean replaceCustomer(int index,Customer cust){
if(index < 0 || index >= total){
return false;
}
customers[index]=cust;
return true;
}
/**
* 删除指定索引位置的客户
* @param index 指定索引
* @return true：删除成功 false：删除失败
*/
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];
}
//将最后一个元素置空
customers[total-1]=null;
total--;
return true;
}
/**
* 获取所有的客户信息
* @return
*/
public Customer[] getAllCustomers(){
Customer[] custs=new Customer[total];
for(int i=0;i<custs.length;i++){
custs[i]=customers[i];
}
return custs;
}
/**
* 获取指定索引位置上的客户
* @param index
* @return
*/
public Customer getCustomer(int index){
if(index < 0 || index >= total){
return null;
}
return customers[index];
}
/**
* 获取客户数量
* @return
*/
public int getTotal(){
return total;
}
}
CustomerView.java文件
package ui;
import bean.Customer;
import service.CustomerList;
import util.CMUtility;
public class CustomerView {
private CustomerList customerList=new CustomerList(10);
public CustomerView(){
Customer customer=new Customer("mike", '男', 18, "123456", "8888@123.com");
customerList.addCustomer(customer);
}
/**
* 显示客户信息管理软件的方法
*/
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.println(" 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("是否确认退出？（Y/N)");
char isExit = CMUtility.readConfirmSelection();
if(isExit == 'Y'){
isFlag=false;
}
break;
}
}
}
/**
* 添加客户的操作
*/
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(20);
System.out.print("邮箱：");
String email = CMUtility.readString(30);
Customer customer=new Customer(name, gender, age, phone, email);
boolean isSuccess = customerList.addCustomer(customer);
if(isSuccess){
System.out.println("-----------------添加成功--------------");
}else{
System.out.println("----------------添加失败---------------");
}
}
//修改客户的操作
private void modifyCustomer(){
System.out.println("-----------------修改客户-----------------");
Customer cust;
int number;
for(;;){
System.out.println("请选择待修改客户编号（-1退出）：");
number = CMUtility.readInt();
if(number== -1){
return;
}
cust=customerList.getCustomer(number-1);
if(cust==null){
System.out.println("无法找到指定用户！");
}
else{//找到客户
break;
}
}
//修改客户
System.out.println("姓名("+cust.getName()+"):");
String name = CMUtility.readString(10, cust.getName());
System.out.println("性别("+cust.getGender()+"):");
char gender = CMUtility.readChar(cust.getGender());
System.out.println("年龄("+cust.getAge()+"):");
int age = CMUtility.readInt(cust.getAge());
System.out.println("电话("+cust.getPhone()+"):");
String phone = CMUtility.readString(20,cust.getPhone());
System.out.println("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("--------------------修改成功！--------------------");
}else{
System.out.println("---------------------修改失败！---------------------");
}
}
//删除客户的操作
private void deleteCustomer(){
System.out.println("-------------------删除客户-------------------");
int number;
for(;;){
System.out.println("请选择待删除客户的编号：");
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;
}
}
//开始删除客户
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("---------------------------删除成功-------------------");
}
}else{
return;
}
}
//显示客户列表
private void listAllCustomers(){
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 view=new CustomerView();
view.enterMainMenu();
}
}
