Java小练习2-----客户信息管理软件
目标
需求说明
实现
C u s t o m e r . j a v a Customer.java Customer.java
package Two;
public class Customer {
private String name;
private String gender;
private int age;
private String phone;
private String email;
public Customer(String name, String gender, int age) {
this(name, gender, age, "", "");
}
public Customer(String name, String gender, int age, String phone, String email) {
this.name = name;
this.gender = gender;
this.age = age;
this.phone = phone;
this.email = email;
}
public String getDetails() {
return "Name:" + name + '\t' + "Gander:" + gender + "\t" + "Age:" + age + "\t\t" + "Phone:" + phone + "\t" + "Email:" + email;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getGender() {
return gender;
}
public void setGender(String 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;
}
}
C u s t o m e r L i s t . j a v a CustomerList.java CustomerList.java
package Two;
public class CustomerList {
private Customer[] customers;
private int total = 0;
public CustomerList(int totalCustomer) {
customers = new Customer[totalCustomer];
}
public boolean addCustomer(Customer customer){
if(total>=customers.length)
return false;
customers[total++]=customer;
return true;
}
public boolean replaceCustomer(int index, Customer cust){
if(index<0 || index>=total)
return false;
customers[index] = cust;
return true;
}
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];
customers[--total] = null;
return true;
}
public Customer[] getAllCustomers(){
Customer[] custs = new Customer[total];
for(int i=0; i< total; i++){
custs[i] = customers[i];
}
return custs;
}
public Customer getCustomers(int index) {
if (index<0 || index>= customers.length)
return null;
return customers[index];
}
public int getTotal() {
return total;
}
}
C M U t i l i t y . j a v a CMUtility.java CMUtility.java
package Two;
import javax.sound.midi.MidiFileFormat;
import java.util.Locale;
import java.util.Scanner;
public class CMUtility {
private static Scanner in = new Scanner(System.in);
public static char readMenuSelection() {
/*用于界面菜单的选择*/
char c;
while (true) {
String str = readKeyBoard(1, false);
c = str.charAt(0);
if (!('0' < c && c < '6'))
System.out.print("Select Error, please input again:");
else
break;
}
return c;
}
public static char readChar() {
/*从键盘读取一个字符，并将其作为方法的返回值*/
String str = readKeyBoard(1, false);
return str.charAt(0);
}
public static char readChar(char defaultValue) {
/*如果用户不输入字符而直接回车，方法将以defaultValue 作为返回值。*/
String str = readKeyBoard(1, false);
return (str.length() == 0) ? defaultValue : str.charAt(0);
}
public static int readInt() {
/*从键盘读取一个长度不超过2位的整数*/
int n;
while (true) {
String str = readKeyBoard(2, false);
try {
n = Integer.parseInt(str);
break;
} catch (NumberFormatException e) {
System.out.print("Number is wrong. Please input again:");
}
}
return n;
}
public static int readInt(int defaultValue) {
int n;
while (true) {
String str = readKeyBoard(2, true);
if (str.equals("")) {
return defaultValue;
}
try {
n = Integer.parseInt(str);
break;
} catch (NumberFormatException e) {
System.out.print("Number is wrong. Please input again:");
}
}
return n;
}
public static String readString(int limit) {
return readKeyBoard(limit, false);
}
public static String readString(int limit, String defaultValue) {
String str = readKeyBoard(limit, true);
return str.equals("") ? defaultValue : str;
}
public static char readConfirmSelection() {
char c;
while (true) {
String str = readKeyBoard(1, false).toUpperCase();
c = str.charAt(0);
if (c == 'Y' || c == 'N')
break;
else
System.out.print("Select Error. Please input again:");
}
return c;
}
private static String readKeyBoard(int limit, boolean blankReturn) {
String line = "";
while (in.hasNextLine()) {
line = in.nextLine();
if (line.length() == 0) {
if (blankReturn)
return line;
else
continue;
}
if (line.length() < 1 || line.length() > limit) {
System.out.print("Input's limit is " + limit + ". Please input again:");
continue;
}
break;
}
return line;
}
}
C u s t o m e r V i e w . j a v a CustomerView.java CustomerView.java
package Two;
public class CustomerView {
private CustomerList customers = new CustomerList(10);
/* public CustomerView(){
Customer cust = new Customer("Tom","man",30,"010-56283825","[email protected]");
customers.addCustomer(cust);
}*/
public void enterMainMenu() {
boolean loopFlag = true;
do {
System.out.println("\n-----------------------------------Customers massager System--------------------------");
System.out.println(" 1. add customer.");
System.out.println(" 2. modify Customer.");
System.out.println(" 3. delete customer.");
System.out.println(" 4. view all customers.");
System.out.println(" 5. exit.");
System.out.print("Please choose 1-5:");
char key = CMUtility.readMenuSelection();
System.out.println();
switch (key) {
case '1':
addNewCustomer();
break;
case '2':
modifyCustomer();
break;
case '3':
deleteCustomer();
break;
case '4':
listAllCustomer();
break;
case '5':
System.out.print("Confirm to exit(Y/N)?");
char yn = CMUtility.readConfirmSelection();
if (yn == 'Y')
loopFlag = false;
break;
}
} while (loopFlag);
}
private void addNewCustomer() {
System.out.println("-----------------------Add new customer-------------------------");
System.out.print("Name:");
String name = CMUtility.readString(4);
System.out.print("Gender(1:man 0:woman):");
String gender = CMUtility.readString(1);
System.out.print("Age:");
int age = CMUtility.readInt();
System.out.print("Tel:");
String phone = CMUtility.readString(15);
System.out.print("email:");
String email = CMUtility.readString(15);
Customer cust = new Customer(name, gender, age, phone, email);
boolean flag = customers.addCustomer(cust);
if (flag)
System.out.println("-----------------------------Add Successful-------------------------");
else
System.out.println("----------------------Full of List. Cannot add anymore--------------");
}
private void modifyCustomer() {
System.out.println("------------------------Modify Customer-----------------------");
int index = 0;
Customer cust = null;
while (true) {
System.out.print("Please choose will be modified customer(input -1 exit):");
index = CMUtility.readInt();
if (index == -1)
return;
cust = customers.getCustomers(index - 1);
if (cust == null)
System.out.println("Cannot find the customer index is " + index + ".");
else
break;
}
System.out.print("Confirm modify it(Y/N):");
char yn = CMUtility.readConfirmSelection();
if (yn == 'N')
return;
System.out.print("Name(Now:" + cust.getName() + "):");
String name = CMUtility.readString(4, cust.getName());
System.out.print("Gender(1:man 0:woman)(Now:" + cust.getGender() + "):");
String gender = CMUtility.readString(1, cust.getGender());
System.out.print("Age(Now:" + cust.getAge() + "):");
int age = CMUtility.readInt(cust.getAge());
System.out.print("Tel(Now:)" + cust.getPhone() + ":");
String phone = CMUtility.readString(15, cust.getPhone());
System.out.print("email(Now:" + cust.getEmail() + "):");
String email = CMUtility.readString(15, cust.getEmail());
cust = new Customer(name, gender, age, phone, email);
boolean flag = customers.replaceCustomer(index - 1, cust);
if (flag)
System.out.println("------------------------Modify Successful-----------------------");
else
System.out.println("--------------------Cannot find the customer--------------------");
}
private void deleteCustomer() {
System.out.println("-------------------------Delete Customer------------------------");
int index = 0;
Customer cust = null;
while (true) {
System.out.print("Please choose will be deleted customer(input -1 exit):");
index = CMUtility.readInt();
if (index == -1)
return;
cust = customers.getCustomers(index - 1);
if (cust == null)
System.out.println("Cannot find the customer index is " + index + ".");
else
break;
}
System.out.print("Confirm delete it(Y/N):");
char yn = CMUtility.readConfirmSelection();
if (yn == 'N')
return;
boolean flag = customers.deleteCustomer(index - 1);
if (flag)
System.out.println("------------------------Delete Successful-----------------------");
else
System.out.println("--------------------Cannot find the customer--------------------");
}
private void listAllCustomer() {
System.out.println("------------------------------customer list-------------------------");
Customer[] custs = customers.getAllCustomers();
if (custs.length == 0)
System.out.println("No one customer");
else {
for (int i = 0; i < custs.length; i++)
System.out.println("Id:" + (i + 1) + "\t" + custs[i].getDetails());
}
System.out.println("----------------------------------End--------------------------------");
}
public static void main(String[] args) {
CustomerView CView = new CustomerView();
CView.enterMainMenu();
}
}
Ps:项目来源于尚硅谷的项目二，本人英文垃圾，代码中的中式英语请忽略（懂就好啦！）[]