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){
            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",
                "[email protected]");
        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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