本文实例为大家分享了java实现客户信息管理系统的具体代码，供大家参考，具体内容如下

一、CMUtility工具类

讲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。

代码如下:

package com.p2.util;import java.util.*;/** * 工具类 * 讲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。 * 返回值为用户选择的数字。 **/ public static char readMenuSelection(){ char c; for (; ; ){ String str = readaKeyBoard(1, false); c = str.charAt(0); if (c != '1' && c!= '2' && c!= '3' && c!= '4' && c!= '5'){ System.out.println("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 = readaKeyBoard(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 = readaKeyBoard(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 = readaKeyBoard(2, false); try{ n = Integer.parseInt(str); break; }catch(NumberFormatException e){ System.out.println("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 = readaKeyBoard(2, true); if (str.equals("")){ return defaultValue; } try{ n = Integer.parseInt(str); break; }catch(NumberFormatException e){ System.out.println("数字输入错误，请重新输入："); } } return n; } /** * 从键盘 读取一个长读不超过limit的字符串，并将其作为方法的返回值。 **/ public static String readString (int limit){ return readaKeyBoard(limit,false); } public static String readString (int limit, String defaultValue){ return readaKeyBoard(limit,false); } /** * 从键盘读取一个疮毒不超过limit的字符串，将其作为方法的返回值。 * 如果用户不输入字符而直接回车，方法以defaultValue作为返回值。 **/ public static char readComfirmSelection(){ char c; for (; ; ){ String str = readaKeyBoard(1, false).toUpperCase(); c = str.charAt(0); if (c == 'Y' || c == 'N'){ break; }else{ System.out.println("选择错误，请重新输入："); } } return c; } private static String readaKeyBoard(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.println("输入长度（不大于" + limit + "）错误，请重新输入："); continue; } break; } return line; }}

二、Customer

代码如下:

package com.p2.bean;/** * 把对象封装到方法里面 * * **/public class Customer { private String name;//客户姓名 private char gender;//性别 private int age; //年龄 private String phone;//电话号码 private String email;//电子邮箱 //构造器 //方法(封装) 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 Customer() { } 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; } }

三、CustomerList

代码如下:

package com.p2.service;/** * 最主要的 * **/import com.p2.bean.Customer;public class CustomerList { private Customer[] customers; private int total = 0; //构造器 /** * 用来初始化customers数组的构造器 * @param totalCustomer: 指定数组的长度 **/ public CustomerList (int totalCustomer){//给正在创建的对象进行初始化 customers = new Customer[totalCustomer]; } //方法 /** * 将指定的客户添加到数组中 * @param customer * @return成功true，失败:false **/ public boolean addCustomer(Customer customer){//增 if(total < 0 || total >= customers.length){ return false; } customers[total++] = customer; return true; } /** * 修改指定位置的客户信息 * @param index * @param cust * @return **/ public boolean replaceCustomer(int index, Customer cust){//改 if(index <0 || index >= total){ return false; } customers[index] = cust; return true; } /** * 删除指定位置上的客户 * @param index * @return **/ public boolean deleteCustsomer(int index){//删除 if(index < 0 || index >= total){ return false; } for(int i = index; i < total - 1; i++){ customers[i] = customers[i + 1]; } //最后有数据的元素需要置空// customers[total - 1] =null;// total --; customers[-- total] = null; return true; } /** * 获得所有的客户信息 * @return **/ public Customer[] getAllCustomers() {//查询所有 Customer[] custs = new Customer[total]; for(int i = 0; i < total; i++){ custs[i] = customers[i]; } return custs; } /** * 获取指定位置上的客户信息 * @param index * @return **/ public Customer getCustomer(int index) {//查询一个 if(index < 0 || index >= total){ return null; } return customers[index]; } //封装 /** * 获取存储客户的的数量 * @return **/ public int getTotal() {//统计数据 return total; }}

四、CustomerView

代码如下:

package com.p2.ui;import com.p2.bean.Customer;import com.p2.service.CustomerList;import com.p2.util.CMUtility;/** * * 用户交互 * * * **/public class CustomerView { private CustomerList customerList = new CustomerList(100); public CustomerView(){ Customer customer = new Customer("王涛",'男', 23, "13213123","wt@gmail.com"); customerList.addCustomer(customer); } /** * 显示《客户信息管理软件》 **/ public void enterMainMenu(){ boolean isFlag = true; while(isFlag){ System.out.println("\n----------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\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.println("退出"); System.out.println("确认是否退出(Y/N):"); char isExit = CMUtility.readComfirmSelection(); if(isExit =='Y'){ isFlag = false; }// break; } // isFlag = false; } } /** * 添加客户 * **/ private void addNewCustomer(){ 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 isSucccess = customerList.addCustomer(customer); if(isSucccess){ System.out.println("------添加完成------"); }else{ System.out.println("------客户已满------"); } } /** * 修改客户 **/ private void modifyCustomer(){ System.out.println("---------修改客户-------"); Customer cust; int number; for(;;){ System.out.print("选择要修改的客户编号(-1退出):"); number = CMUtility.readInt(); if (number == -1){ return; }else{ cust = customerList.getCustomer(number - 1); if(cust == null){ System.out.println("无法找到指定客户！！"); }else{//找到相应的客户 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("修改成功！！"); }else{ System.out.println("修改失败！！"); } } /** * 删除客户 **/ private void deleteCustomer(){ System.out.println("-------删除客户-------"); int number; for(;;){ System.out.print("请选择呆删除客户的编号(-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; } } //找到客户了 System.out.println("是否确认删除（Y/N）:"); char isDelete = CMUtility.readComfirmSelection(); if(isDelete == 'Y'){ boolean deleteSuccess = customerList.deleteCustsomer(number - 1); if(deleteSuccess ){ System.out.println("-----------删除成功---------"); }else{ System.out.println("-----------删除失败---------"); } }else{ return; } } /** * 显示客户列表 **/ private void listAllCustomers(){// System.out.println("显示客户"); System.out.println("---------客户列表-------"); 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("---------客户列表结束-------"); } public static void main(String[] args) { CustomerView view = new CustomerView(); view.enterMainMenu(); }}

五、运行结果

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。