java项目之Bank银行代码

tech2022-10-11  78

文中所有代码来自尚硅谷宋红康老师的Java课程,如有侵权请联系删除。

项目说明:

模拟实现一个基于文本界面的 客户信息管理软件 》。

该软件能够实现对客户对象的插入、修改和删除(用数组实现),并能够打印客户明细表。

项目采用分级菜单方式。主菜单如下:

             -----------------客户信息管理软件-----------------

 

                                     1 添 加 客 户

                                     2 修 改 客 户

                                     3 删 除 客 户

                                     4 客 户 列 表

                                     5 退           出

 

                                     请选择(1-5)_

每个客户的信息被保存在c ustomer 对象中。以一个c ustomer 类型的数组来记录当前所有的客户。每次“添加客户”(菜单 1 )后,客户( Customer )对象被添加到数组中。每次“修改客户”(菜单 2 )后,修改后的客户( Customer )对象替换数组中原对象。每次“删除客户”(菜单 3 )后,客户( Customer )对象被从数组中清除。执行“客户列表 ”(菜单 4 )时,将列出数组中所有客户的信息。      

项目代码

整个项目分为4个Java文件,分别实现功能。

CMUtility文件,实现与客户的交互

package customer.util; import java.util.*; public class CMUtil { 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。返回值为用户键入字符。 */ 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; } /** 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 = readKeyBoard(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 = readKeyBoard(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 = 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; } /** 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。 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 = 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; } /** 从键盘读取一个长度不超过limit的字符串,并将其作为方法的返回值。 */ public static String readString(int limit) { return readKeyBoard(limit, false); } /** 从键盘读取一个长度不超过limit的字符串,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 String readString(int limit, String defaultValue) { String str = readKeyBoard(limit, true); return str.equals("")? defaultValue : str; } /** 用于确认选择的输入。该方法从键盘读取‘Y’或’N’,并将其作为方法的返回值。 */ 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代码文件,实现创建客户信息

package customer.bean; public class customer { private String name; private char gender; private int age; private String phone; private String email; public void setName(String name) { this.name = name; } public String getName() { return name; } public void setGender(char gender) { this.gender = gender; } public char getGender() { return gender; } public void setAge(int age) { this.age = age; } public int getAge() { return age; } public String getPhone() { return phone; } public void setPhone(String phone) { this.phone = phone; } public void setEmail(String email) { this.email = email; } public String getEmail() { return 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; } }

customerList文件,实现客户信息的一些操作

package customer.service; import customer.bean.customer; public class customerList { private customer[] customers; //用来保存用户对象的数组 private int total=0; //记录已保存的客户的数量 public customerList(int totalCustomer){ customers=new customer[totalCustomer]; } public boolean addcustomer(customer customes){ if (total>=customers.length){ return false; } customers[total++]=customes; 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=0;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 getCustomer(int index){ if (index<0 || index>=total){ return null; } return customers[index]; } public int getTotal(){ return total; } }

customerView文件,实现主界面实现和逻辑交互

package customer.ui; import customer.bean.customer; import customer.service.customerList; import customer.util.CMUtil; public class customerview { private customerList customers=new customerList(10); public customerview(){ customer cust=new customer("张三", '男', 30, "010-56253825", "abc@email.com"); customers.addcustomer(cust); } public void enterMainMenu(){ boolean loopFlag = true; do { System.out.println("\n-----------------客户信息管理软件-----------------\n"); 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 key = CMUtil.readMenuSelection(); System.out.println(); switch (key) { case '1': addNewCustomer(); break; case '2': modifyCustomer(); break; case '3': deleteCustomer(); break; case '4': listAllCustomers(); break; case '5': System.out.print("确认是否退出(Y/N):"); char yn = CMUtil.readConfirmSelection(); if (yn == 'Y') loopFlag = false; break; } } while (loopFlag); } private void addNewCustomer() { System.out.println("---------------------添加客户---------------------"); System.out.print("姓名:"); String name = CMUtil.readString(4); System.out.print("性别:"); char gender = CMUtil.readChar(); System.out.print("年龄:"); int age = CMUtil.readInt(); System.out.print("电话:"); String phone = CMUtil.readString(15); System.out.print("邮箱:"); String email = CMUtil.readString(30); 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("----------------记录已满,无法添加-----------------"); } } private void modifyCustomer() { System.out.println("---------------------修改客户---------------------"); int index = 0; customer cust = null; for (;;) { System.out.print("请选择待修改客户编号(-1退出):"); index = CMUtil.readInt(); if (index == -1) { return; } cust = customers.getCustomer(index - 1); if (cust == null) { System.out.println("无法找到指定客户!"); } else break; } System.out.print("姓名(" + cust.getName() + "):"); String name = CMUtil.readString(4, cust.getName()); System.out.print("性别(" + cust.getGender() + "):"); char gender = CMUtil.readChar(cust.getGender()); System.out.print("年龄(" + cust.getAge() + "):"); int age = CMUtil.readInt(cust.getAge()); System.out.print("电话(" + cust.getPhone() + "):"); String phone = CMUtil.readString(15, cust.getPhone()); System.out.print("邮箱(" + cust.getEmail() + "):"); String email = CMUtil.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("----------无法找到指定客户,修改失败--------------"); } } private void deleteCustomer() { System.out.println("---------------------删除客户---------------------"); int index = 0; customer cust = null; for (;;) { System.out.print("请选择待删除客户编号(-1退出):"); index = CMUtil.readInt(); if (index == -1) { return; } cust = customers.getCustomer(index - 1); if (cust == null) { System.out.println("无法找到指定客户!"); } else break; } System.out.print("确认是否删除(Y/N):"); char yn = CMUtil.readConfirmSelection(); if (yn == 'N') return; boolean flag = customers.deletecustomer(index - 1); if (flag) { System.out .println("---------------------删除完成---------------------"); } else { System.out.println("----------无法找到指定客户,删除失败--------------"); } } private void listAllCustomers() { System.out.println("---------------------------客户列表---------------------------"); customer[] custs = customers.getAllCustomers(); if (custs.length == 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\t电话\t\t邮箱"); 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\t" + custs[i].getPhone() + "\t" + custs[i].getEmail()); //System.out.println((i+1) + "\t" + custs[i].getDetails()); } } System.out.println("-------------------------客户列表完成-------------------------"); } public static void main(String[] args) { customerview cView = new customerview(); cView.enterMainMenu(); } }      
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