客户信息管理软件
CMUtility
import java.util.Scanner;
public class CMUtility {
private static Scanner scanner = new Scanner(System.in);
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;
}
public static char readChar() {
String str = readKeyBoard(1, false);
return str.charAt(0);
}
public static char readChar(char defaultValue) {
String str = readKeyBoard(1, true);
return (str.length() == 0) ? defaultValue : str.charAt(0);
}
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;
}
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;
}
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;
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
/**
* 客户类
*/
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 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;
}
//返回详细信息
public String getDetails() {
return name + "\t\t" + gender + "\t\t" + age + "\t\t" + phone + "\t\t" + email;
}
}
CustomerList
/**
* Customer的管理模块
*/
public class CustomerList {
private Customer[] customers;//保存Customer对象
private int total = 0;//有效客户的数量
/**
* 初始化customers数组的容量
* @param totalCustomer
*/
public CustomerList(int totalCustomer) {
customers = new Customer[totalCustomer];
}
/**
* 添加客户
* @param customer
* @return
*/
public boolean addCustomer(Customer customer) {
if (total >= customers.length) {
return false;//数组已满
}
customers[total] = customer;
total++;
return true;//添加成功
}
/**
* 修改客户
* @param index
* @param cust
* @return
*/
public boolean replaceCustomer(int index, Customer cust) {
if (total < 0 || index >= total) {
return false;
}
customers[index] = cust;
return true;
}
/**
* 删除客户
* @param index
* @return
*/
public boolean deleteCustomer(int index) {
if (total < 0 || index >= total) {
return false;
}
for (int i = index; i < total - 1; i++) {
customers[i] = customers[i + 1];
}
customers[total - 1] = null;
total--;
return true;
}
/**
* 返回有效元素的客户
* @return
*/
public Customer[] getAllCustomer() {
Customer[] cuts = new Customer[total];
for (int i = 0; i < cuts.length; i++) {
cuts[i] = customers[i];
}
return cuts;
}
/**
* 返回客户对象的索引位置
* @param index
* @return
*/
public Customer getCustomer(int index) {
return customers[index];
}
public static void main(String[] args) {
CustomerList cl = new CustomerList(5);
Customer customer = new Customer("张三", '男', 18, "010-1234567", "zhangsan@abc.com");
boolean flag = cl.addCustomer(customer);
if (flag) {
System.out.println("添加成功！");
} else {
System.out.println("添加失败！");
}
Customer[] allCustomer = cl.getAllCustomer();
for (Customer cust : allCustomer) {
System.out.println(cust.getDetails());
}
}
}
CustomerView
/**
* 与用户进行交互
*/
public class CustomerView {
private CustomerList customerList = new CustomerList(10);
public void enterMainMenu() {
boolean loopFlag = true;
do {
System.out.println("\n-----------------客户信息管理软件-----------------\n");
System.out.println("\t\t\t\t 1 添加客户");
System.out.println("\t\t\t\t 2 修改客户");
System.out.println("\t\t\t\t 3 删除客户");
System.out.println("\t\t\t\t 4 客户列表");
System.out.println("\t\t\t\t 5 退出");
System.out.println();
System.out.print("\t\t\t\t 请选择(1-5)：");
char ch = CMUtility.readMenuSelection();
switch (ch) {
case '1':
//添加客户
addNewCustomer();
break;
case '2':
//修改客户
modifyCustomer();
break;
case '3':
//删除客户
deleteCustomer();
break;
case '4':
//客户列表
listAllCustomer();
break;
case '5':
//退出
System.out.print("是否退出(y/n):");
char c = CMUtility.readConfirmSelection();
if (c == 'Y') {
loopFlag = false;
}
break;
}
} while (loopFlag);
}
/**
* 添加
*/
private void addNewCustomer() {
System.out.println("\n---------------------添加客户---------------------\n");
System.out.print("姓名:");
String name = CMUtility.readString(20);
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 emile = CMUtility.readString(20);
//将散列的数据装进对象
Customer customer = new Customer(name, gender, age, phone, emile);
//将对象添加到数组中
boolean flag = customerList.addCustomer(customer);
if (flag) {
System.out.println("---------------------添加完成---------------------");
} else {
System.out.println("---------------------添加失败---------------------");
}
}
/**
* 修改
*/
private void modifyCustomer() {
System.out.println("\n---------------------修改客户---------------------\n");
Customer customer = null;
int num = 0;
while (true) {
System.out.print("请选择待修改客户编号(-1退出)：");
num = CMUtility.readInt();
if (num == -1) {
return;//结束当前方法
}
customer = customerList.getCustomer(num - 1);
if (customer == null) {
System.out.println("无法找到指定客户！");
} else {
break;//结束这个死循环
}
}
//修改操作
System.out.print("姓名(" + customer.getName() + "):");
String name = CMUtility.readString(20, customer.getName());
System.out.print("性别(" + customer.getGender() + "):");
char gender = CMUtility.readChar(customer.getGender());
System.out.print("年龄(" + customer.getAge() + "):");
int age = CMUtility.readInt(customer.getAge());
System.out.print("电话(" + customer.getPhone() + "):");
String phone = CMUtility.readString(20, customer.getPhone());
System.out.print("邮箱(" + customer.getEmail() + "):");
String emile = CMUtility.readString(20, customer.getEmail());
Customer cust = new Customer(name, gender, age, phone, emile);
boolean flag = customerList.replaceCustomer(num - 1, cust);
if (flag) {
System.out.println("---------------------修改完成---------------------");
} else {
System.out.println("---------------------修改失败---------------------");
}
}
/**
* 删除
*/
private void deleteCustomer() {
System.out.println("\n---------------------删除客户---------------------\n");
int num = 0;
while (true) {
System.out.print("请选择待删除客户编号(-1退出)：");
num = CMUtility.readInt();
if (num == -1) {
return;//结束当前方法
}
Customer cust = customerList.getCustomer(num - 1);
if (cust == null) {
System.out.println("无法找到客户信息！");
} else {
break;//结束这个死循环
}
}
//删除操作
System.out.print("确认是否删除(Y/N)：");
char ch = CMUtility.readConfirmSelection();
if (ch == 'N') {
return;//结束方法别删了
}
boolean flag = customerList.deleteCustomer(num - 1);
if (flag) {
System.out.println("---------------------删除成功---------------------");
} else {
System.out.println("---------------------删除失败---------------------");
}
}
/**
* 客户列表
*/
private void listAllCustomer() {
System.out.println("\n---------------------------客户列表---------------------------");
Customer[] allCustomer = customerList.getAllCustomer();
if (allCustomer.length == 0) {
System.out.println("无法找到信息！");
} else {
System.out.println("编号\t姓名\t性别\t年龄\t电话\t\t邮箱");
}
for (int i = 0; i < allCustomer.length; i++) {
System.out.println((i + 1) + "\t" + allCustomer[i].getDetails());
}
}
/**
* 程序的入口
*
* @param args
*/
public static void main(String[] args) {
CustomerView cv = new CustomerView();
cv.enterMainMenu();
}
}