CMUtility 工具类的实现
package com.chenxi.p2.util;
//package com.atguigu.p2;
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 类的实现
package com.chenxi.p2.bean;
/*
*/
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
private String email;//电子邮箱
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 void setAge(int age) {
this.age = age;
}
public void setGender(char gender) {
this.gender = gender;
}
public void setEmail(String email) {
this.email = email;
}
public void setPhone(String phone) {
this.phone = phone;
}
public String getName(){
return this.name;
}
public String getPhone(){
return this.phone;
}
public char getGender() {
return gender;
}
public int getAge() {
return age;
}
public String getEmail() {
return email;
}
}
CustomerList 类的实现
package com.chenxi.p2.service;
import com.chenxi.p2.bean.Customer;
/*
*/
public class CustomerList {
private Customer[] customers;//
private int total = 0;
/*
初始化customers数组的构造器
@param totalCustomer:指定数组的长度
*/
public CustomerList(int totalCustomer){
//this.total=totalCustomer;
customers= new Customer[totalCustomer];
}
/*
将指定的客户添加到数组中
return返回true表示添加成功false添加失败
*/
public boolean addCustomer(Customer customer){
if (total>=customers.length){
return false;
}else {
customers[total]=customer;
total++;
return true;
}
}
/*
修改指定位置的信息
return true表示成功 false表示失败
*/
public boolean replaceCustomer(int index,Customer cust){
if (index<0||index>=total){
return false;
}else {
customers[index]=cust;
return true;
}
}
/*
删除指定位置上的元素
return teue 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];
// i++;
}
customers[total-1]=null;
total--;
return true;
}
public Customer[] getAllCustomers(){
Customer[] cus=new Customer[total];
for (int i=0;i<total;i++){
cus[i]=customers[i];
}
return cus;
}
public Customer getCustomer(int index){
if (index<0||index>=total){
return null;
}
return customers[index];
}
public int getTotal(){
return total;
}
}
CustomerView 类的实现
package com.chenxi.p2.ui;
import com.chenxi.p2.bean.Customer;
import com.chenxi.p2.service.CustomerList;
import com.chenxi.p2.util.CMUtility;
public class CustomerView {
private CustomerList customersList =new CustomerList(10);
int total;
public CustomerView(){
Customer customer = new Customer("张三", '男', 30, "010-56253825",
"abc@email.com");
customersList.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("
-----------------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.print(" 请选择(1-5)：");
char menu=CMUtility.readMenuSelection();
switch (menu){
case '1':
this.addNewCustomer();
break;
case '2':
this.modifyCustomer();
break;
case '3':
this.deleteCustomer();
break;
case '4':
this.listAllCustomers();
break;
case '5':
// System.out.println("退出！");
System.out.println("确认是否退出（Y/N）:");
char isExit=CMUtility.readConfirmSelection();
if (isExit == 'Y'){
isFlag = false;
}
}
}
}
/*
添加客户操作
*/
public void addNewCustomer(){
System.out.println("");
System.out.println("---------------------添加客户---------------------");
System.out.print("姓名：");
String name = CMUtility.readString(4);
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(15);
System.out.print("邮箱：");
String email = CMUtility.readString(15);
//将上述数据记录对象中
Customer cust = new Customer(name, gender, age, phone, email);
boolean flag = customersList.addCustomer(cust);
if (flag) {
System.out
.println("---------------------添加完成---------------------");
} else {
System.out.println("----------------记录已满,无法添加-----------------");
}
}
/*
修改客户操作
*/
public void modifyCustomer(){
//System.out.println("修改");
System.out.println("---------------------修改客户---------------------");
int index = 0;
Customer cust ;//声明在外面
for (;;) {
System.out.print("请选择待修改客户编号(-1退出)：");
index = CMUtility.readInt();
if (index == -1) {
return;
}
//赋值在里面
cust = customersList.getCustomer(index - 1);
if (cust == null) {
System.out.println("无法找到指定客户！");
} else {
break;//结束循环
}
}
//修改操作
System.out.print("姓名(" + cust.getName() + ")：");
//表示如果不修改就用默认值（原来的name的值）
String name = CMUtility.readString(4, 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(15, cust.getPhone());
System.out.print("邮箱(" + cust.getEmail() + ")：");
String email = CMUtility.readString(15, cust.getEmail());
cust = new Customer(name, gender, age, phone, email);
boolean flag = customersList.replaceCustomer(index - 1, cust);
if (flag) {
System.out
.println("---------------------修改完成---------------------");
} else {
System.out.println("----------无法找到指定客户,修改失败--------------");
}
}
/*
删除客户操作 b
*/
public void deleteCustomer(){
System.out.println("---------------------删除客户---------------------");
int index ;
Customer cust ;
for (;;) {
System.out.print("请选择待删除客户编号(-1退出)：");
index = CMUtility.readInt();
if (index == -1) {
return;
}
cust = customersList.getCustomer(index - 1);
if (cust == null) {
System.out.println("无法找到指定客户！");
} else
break;
}
System.out.print("确认是否删除(Y/N)：");
char yn = CMUtility.readConfirmSelection();
if (yn == 'N')
return;
boolean flag = customersList.deleteCustomer(index - 1);
if (flag) {
System.out.println("---------------------删除完成---------------------");
} else {
System.out.println("----------无法找到指定客户,删除失败--------------");
}
}
/*
显示客户列表
*/
public void listAllCustomers(){
System.out.println("客户");
System.out.println("---------------------------客户列表---------------------------");
int total= customersList.getTotal();
if (total==0){
System.out.println("没有客户记录！");
}else {
System.out.println("编号 姓名 性别 年龄 电话 邮箱");
Customer[] custs=customersList.getAllCustomers();
for (int i =0 ;i<custs.length;i++) {
Customer cust=custs[i];
System.out.println((i + 1) + " " + cust.getName()+" "+cust.getGender()+" "+cust.getAge()+ " " + custs[i].getPhone() + " " + custs[i].getEmail());
}
}
System.out.println("-------------------------客户列表完成-------------------------");
}
public static void main(String[] args){
CustomerView View=new CustomerView();
View.enterMainMenu();
}
}