java项目之Bank银行代码

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customer对象中。

•以一个customer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！");} elsebreak;}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！");} elsebreak;}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();}}