java實現客戶管理系統
本文實例為大傢分享瞭java實現客戶管理系統的具體代碼，供大傢參考，具體內容如下
代碼:
先寫個客戶類
package jjave_16;
/**
* 客戶類
*
*/
public class Customer {
private String name;
private char gender;
private int age;
private String phone;
private String email;
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;
}
public String toString() {
return "Customer [name=" + name + ", gender=" + gender + ", age=" + age + ", phone=" + phone + ", email=" + email + "]";
}
}
之後就寫兩個工具類和運行類
package jjave_16;
/**
* 工具類:操作字符長度輸入是否正確
*
*/
import java.util.Scanner;
public class CMUtility {
/**
* 用於界面菜單的選擇,該方法讀取鍵盤,如果用戶輸入1-5中的任意字符,則方法返回,返回值為用戶鍵入字符
*/
private static Scanner scan=new Scanner(System.in);//少瞭static，下面的方面無法使用
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.println("選擇錯誤,請重新輸入:");
}else break;
}
return c;
}
/**
*
* @param
* @param blankReturn
* @return
*/
public static String readKeyBoard(int limit, boolean blankReturn) {
String line=" ";
for(;;) {
line=scan.nextLine();
if(line.length()==0) {
if(blankReturn)
return line;
}
if(line.length()<1||line.length()>limit) {
System.out.println("輸入長度(在大於)" + limit + ")錯誤,請重新輸入:");
//continue;
}else break;
}
return line;
}
/**
* 功能5: 退出判斷
*/
public static char readConfirmSelection() {
char c;
for(;;) {
String str=readKeyBoard(1,false).toUpperCase();
c=str.charAt(0);
if(c!='Y'&&c!='N') {
System.out.println("選擇錯誤,請重新輸入:");
}else break;
}
return c;
}
/**
* 從鍵盤讀取一個長度不超過limit的字符串,並將其作為方法的返回值
*/
public static String readString(int i) {
return readKeyBoard(i,false);
}
/**
* 從鍵盤讀取一個字符,並將其作為方法的返回值
*/
public static char readChar() {
char c;
for (;;) {
String str = readKeyBoard(1, false);
c = str.charAt(0);
if (c == '男' || c == '女') {
break;
} else {
System.out.println("輸入錯誤(隻能選擇男或女),請重新輸入:");
}
}
return c;
}
/**
* 從鍵盤讀取一個長度不超過2位的整數,並將其作為方法的返回值
*/
public static int readInt() {
int n;
for (;;) {
String str = readKeyBoard(2, false);
try {
n = Integer.parseInt(str);
break;
} catch (Exception e) {
System.out.println("數字輸入錯誤,請重新輸入:");
}
}
return n;
}
}
package jjave_16;
/**
* 工具類:操作存儲客戶的數組增刪改查
*
*/
public class CustomerList {
private Customer[] customers;
private int total=0;
public CustomerList(int index){
customers=new Customer[index];
}
/**
* 查詢所有客戶
* 因為需要借助total的值，來確定是數組中的第幾個！！
*/
public Customer[] getAllCustomers() {
Customer[] custs = new Customer[total];
for(int i=0;i<total;i++) {
custs[i] = customers[i];
}
return custs;
}
public Customer getCustomer(int limit) {
if(limit>0||limit<total) {
return customers[limit];
}else return null;
}
public boolean addCustomer(Customer cust) {
/**
* for(int i=0;i<index;i++) {
* customers[i]=cust;
* }
* 初步想出的方法，可惜實現很麻煩。。。
*/
if(total>customers.length)return false;
customers[total++]=cust;
return true;
}
/**
* 根據編號刪除客戶
*/
public boolean deleteCustomer(int index) {
if(index<0 || index>=total) return false;
/**
* for裡面的條件值得一想。
*/
for(int i=index;i<total-1;i++) {
customers[i]=customers[i+1];
}
customers[--total]=null;
return true;
}
public boolean replaceCustomer(int index,Customer cust) {
if(index<0 || index>=total) return false;
customers[index]=cust;
return true;
}
}
package com.up;
/**
* 業務類
*
*/
public class CustomerView {
public static void main(String[] args) {
CustomerView cView = new CustomerView();
cView.enterMainMenu();
}
private CustomerList customers = new CustomerList(10);
public CustomerView() {
Customer cust = new Customer("張三", '男', 28, "010-56253825", "[email protected]");
customers.addCustomer(cust);
}
public void enterMainMenu() {
boolean loopFlag = true;
do {
System.out.println("---------------------客戶信息管理軟件------------------------");
System.out.println(" 1 添 加 客 戶");
System.out.println(" 2 修 改 客 戶");
System.out.println(" 3 刪 除 客 戶");
System.out.println(" 4 客 戶 列 表");
System.out.println(" 5 退 出");
System.out.println(" 請選擇(1-5):");
char key = CMUtility.readMenuSelection();
switch (key) {
case '1':
addNewCustomer();
break;
case '2':
modifyCustomer();
break;
case '3':
deleteCustomer();
break;
case '4':
listAllCustomer();
break;
case '5':
System.out.println("確認是否退出(Y/N):");
char yn = CMUtility.readConfirmSelection();
if (yn == 'Y') {
loopFlag = false;
}
break;
}
} while (loopFlag);
}
private void addNewCustomer() {
System.out.println("------------------------添加客戶----------------------");
System.out.println("姓名:");
String name = CMUtility.readString(4);
System.out.println("性別:");
char gender = CMUtility.readChar();
System.out.println("年齡");
int age = CMUtility.readInt();
System.out.println("電話:");
String phone = CMUtility.readString(15);
System.out.println("郵箱:");
String email = CMUtility.readString(15);
Customer cust = new Customer(name, gender, age, phone, email);
boolean flag = customers.addCustomer(cust);
if (flag) {
System.out.println("------------------------添加完成----------------------");
} else {
System.out.println("---------------------記錄已滿,無法添加----------------------");
}
}
private void modifyCustomer() {
System.out.println("------------------------修改客戶----------------------");
int index = 0;
Customer cust = null;
for (;;) {
System.out.println("請選擇待修改客戶編號(-1退出):");
index = CMUtility.readInt();
if (index == -1) {
return;
}
cust = customers.getCustomer(index - 1);
if(cust == null){
System.out.println("無法找到指定客戶!");
}else
break;
}
System.out.println("姓名("+cust.getName()+"):");
String name = CMUtility.readString(4,cust.getName());
System.out.println("性別("+cust.getGender()+"):");
char gender = CMUtility.readChar();
System.out.println("年齡("+cust.getAge()+"):");
int age = CMUtility.readInt();
System.out.println("電話("+cust.getPhone()+"):");
String phone = CMUtility.readString(15,cust.getPhone());
System.out.println("郵箱("+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("------------------------修改完成----------------------");
}else{
System.out.println("------------------無法找到指定客戶,修改失敗------------------");
}
}
private void deleteCustomer() {
System.out.println("------------------------刪除客戶----------------------");
int index = 0;
Customer cust = null;
for (;;) {
System.out.println("請選擇待刪除客戶編號(-1退出):");
index = CMUtility.readInt();
if (index == -1) {
return;
}
cust = customers.getCustomer(index - 1);
if (cust == null) {
System.out.println("無法找到指定客戶!");
} else
break;
}
System.out.println("確認是否刪除(Y/N):");
char yn = CMUtility.readConfirmSelection();
if (yn == 'N')
return;
boolean flag = customers.deleteCustomer(index - 1);
if (flag) {
System.out.println("------------------------刪除完成----------------------");
} else {
System.out.println("------------------無法找到指定客戶,刪除失敗------------------");
}
}
private void listAllCustomer() {
System.out.println("------------------------客戶列表----------------------");
Customer[] custs = customers.getAllCustomers();
if (custs.length == 0) {
System.out.println("沒有客戶記錄!");
} else {
System.out.println("編號\t姓名\t性別\t年齡\t電話\t\t郵箱");
for (int i = 0; i < custs.length; i++) {
System.out.println(i + 1 + "\t" + custs[i].getName() + "\t" + custs[i].getGender() + "\t" + custs[i].getAge() + "\t" + custs[i].getPhone() + "\t" + custs[i].getEmail());
}
}
}
}
暫時先用數組實現客戶的保存，當然裡面使用到瞭高內聚低耦合的設計概念。
以上就是本文的全部內容，希望對大傢的學習有所幫助，也希望大傢多多支持WalkonNet。