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:
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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:
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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:
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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:
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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测试数据" ); 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。
原文链接：https://blog.csdn.net/xue3236522091/article/details/113799144