文章目录
- 1、软件设计结构
- 2、MVC设计模式
- 3、代码
1、软件设计结构
2、MVC设计模式
3、代码
package com.atguigu.p2.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;
}
}
package com.atguigu.p2.bean;
/**
*
* @Descripsion Customer为实体对象,用来封装客户信息
* @author Orange
* @Email JingCheng2018or@163.com
* @Version 1.0
* @date 2020年11月7日下午2:47:57
*/
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
//提供构造器
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;
}
//提供get和set方法
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;
}
}
package com.atguigu.p2.service;
import com.atguigu.p2.bean.Customer;
/**
*
* @Descripsion CustomerList为Customer对象的管理模块
* 内部用数组管理一组Customer对象,并提供相应的增、删、改、查
* 方法供CustomerView调用
* @author Orange
* @Email JingCheng2018or@163.com
* @Version 1.0
* @date 2020年11月7日下午2:50:52
*/
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
//初始化用户信息
public CustomerList(int totalCustomer) {
customers = new Customer[totalCustomer];
}
//增加用户信息
public boolean addCustomer(Customer customer) {
if (total<customers.length) {
customers[total++]=customer;//向数组中添加新的成员
return true;
}else {
//System.out.println("数组已满,无法添加!");
return false;
}
}
//替换用户信息
public boolean replaceCustomer(int index, Customer cust) {
if(index<0||index>total-1) {
//System.out.println("索引无效");
return false;
}else {
customers[index]=cust;
return true;
}
}
//删除用户信息
public boolean deleteCustomer(int index){
if(index<0||index>total-1) {
//System.out.println("索引无效");
return false;
}
for(int j=index;j<total-1;j++) {
customers[j]=customers[j+1];
}
customers[--total]=null;
return true;
}
// 返回所有用户信息
public Customer[] getAllCustomers() {
Customer[] newCustomers = new Customer[total];
for(int i =0; i<total; i++) {
newCustomers[i]=customers[i];
}
return newCustomers;
}
//获取指定位置的客户对象
public Customer getCustomer(int index) {
if(index<0||index>total-1) {
//System.out.println("索引无效");
return null;
}
return customers[index];
}
//获取存储的客户的数量
public int getTotal() {
return total;
}
}
package com.atguigu.p2.ui;
import com.atguigu.p2.bean.Customer;
import com.atguigu.p2.service.CustomerList;
import com.atguigu.p2.util.CMUtility;
/**
*
* @Description CustomerView为主模块,负责菜单的显示和处理用户操作
* @version
* @date
*
*/
public class CustomerView {
private CustomerList customerList = new CustomerList(10);
public CustomerView(){
Customer customer = new Customer("王涛", '男', 23, "13212341234", "wt@gmail.com");
customerList.addCustomer(customer);
}
/**
* 显示《客户信息管理软件》界面的方法
*
* @Description*/
public void enterMainMenu() {
boolean isFlag = true;
while(isFlag){
System.out.println("\n-----------------客户信息管理软件-----------------\n");
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.print("确认是否退出(Y/N):");
char isExit = CMUtility.readConfirmSelection();
if(isExit == 'Y'){
isFlag = false;
}
}
}
}
/**
* 添加客户的操作
*
* @Description*/
private void addNewCustomer() {
// System.out.println("添加客户的操作");
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 isSuccess = customerList.addCustomer(customer);
if(isSuccess){
System.out.println("---------------------添加完成---------------------");
}else{
System.out.println("-------------------客户目录已满,添加失败---------------");
}
}
/**
* 修改客户的操作
*
* @Description*/
private void modifyCustomer() {
// System.out.println("修改客户的操作");
System.out.println("---------------------修改客户---------------------");
Customer cust ;
int number;
for(;;){
System.out.print("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("无法找到指定客户!");
}else{//找到了相应编号的客户
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("---------------------修改完成---------------------");
}else{
System.out.println("---------------------修改失败---------------------");
}
}
/**
* 删除客户的操作
*
* @Description*/
private void deleteCustomer() {
// System.out.println("删除客户的操作");
System.out.println("---------------------删除客户---------------------");
int number;
for(;;){
System.out.print("请选择待删除客户编号(-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;
}
}
//找到了指定的客户
System.out.print("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("---------------------删除失败---------------------");
}
}else{
return;
}
}
/**
* 显示客户列表的操作
*
* @Description*/
private void listAllCustomers() {
// System.out.println("显示客户列表的操作");
System.out.println("---------------------------客户列表---------------------------\n");
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();
}
}