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:
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):_
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
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package customer.util;
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import java.util.*;
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public class CMUtil {
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private static Scanner scanner = new Scanner(System.in);
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/**
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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。
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*/
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public static char readMenuSelection() {
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char c;
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for (; ; ) {
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String str = readKeyBoard(1, false);
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c = str.charAt(0);
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if (c != '1' && c != '2' &&
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c != '3' && c != '4' && c != '5') {
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System.out.print("选择错误,请重新输入:");
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} else break;
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}
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return c;
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}
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/**
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从键盘读取一个字符,并将其作为方法的返回值。
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*/
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public static char readChar() {
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String str = readKeyBoard(1, false);
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return str.charAt(0);
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}
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/**
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从键盘读取一个字符,并将其作为方法的返回值。
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如果用户不输入字符而直接回车,方法将以defaultValue 作为返回值。
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*/
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public static char readChar(char defaultValue) {
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String str = readKeyBoard(1, true);
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return (str.length() == 0) ? defaultValue : str.charAt(0);
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}
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/**
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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。
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*/
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public static int readInt() {
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int n;
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for (; ; ) {
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String str = readKeyBoard(2, false);
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try {
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n = Integer.parseInt(str);
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break;
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} catch (NumberFormatException e) {
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System.out.print("数字输入错误,请重新输入:");
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}
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}
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return n;
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}
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/**
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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。
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如果用户不输入字符而直接回车,方法将以defaultValue 作为返回值。
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*/
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public static int readInt(int defaultValue) {
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int n;
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for (; ; ) {
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String str = readKeyBoard(2, true);
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if (str.equals("")) {
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return defaultValue;
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}
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try {
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n = Integer.parseInt(str);
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break;
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} catch (NumberFormatException e) {
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System.out.print("数字输入错误,请重新输入:");
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}
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}
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return n;
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}
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/**
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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。
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*/
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public static String readString(int limit) {
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return readKeyBoard(limit, false);
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}
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/**
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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。
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如果用户不输入字符而直接回车,方法将以defaultValue 作为返回值。
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*/
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public static String readString(int limit, String defaultValue) {
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String str = readKeyBoard(limit, true);
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return str.equals("")? defaultValue : str;
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}
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/**
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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。
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*/
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public static char readConfirmSelection() {
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char c;
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for (; ; ) {
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String str = readKeyBoard(1, false).toUpperCase();
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c = str.charAt(0);
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if (c == 'Y' || c == 'N') {
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break;
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} else {
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System.out.print("选择错误,请重新输入:");
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}
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}
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return c;
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}
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private static String readKeyBoard(int limit, boolean blankReturn) {
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String line = "";
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while (scanner.hasNextLine()) {
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line = scanner.nextLine();
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if (line.length() == 0) {
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if (blankReturn) return line;
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else continue;
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}
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if (line.length() < 1 || line.length() > limit) {
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System.out.print("输入长度(不大于" + limit + ")错误,请重新输入:");
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continue;
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}
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break;
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}
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return line;
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}
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}
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customer代码文件,实现创建客户信息
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package customer.bean;
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public class customer {
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private String name;
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private char gender;
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private int age;
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private String phone;
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private String email;
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public void setName(String name) {
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this.name = name;
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}
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public String getName() {
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return name;
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}
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public void setGender(char gender) {
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this.gender = gender;
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}
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public char getGender() {
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return gender;
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}
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public void setAge(int age) {
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this.age = age;
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}
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public int getAge() {
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return age;
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}
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public String getPhone() {
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return phone;
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}
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public void setPhone(String phone) {
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this.phone = phone;
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}
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public void setEmail(String email) {
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this.email = email;
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}
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public String getEmail() {
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return email;
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}
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public customer(){
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}
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public customer(String name,char gender,int age,String phone,String email){
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this.name=name;
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this.gender=gender;
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this.age=age;
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this.phone=phone;
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this.email=email;
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}
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}
customerList文件,实现客户信息的一些操作
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package customer.service;
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import customer.bean.customer;
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public class customerList {
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private customer[] customers; //用来保存用户对象的数组
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private int total=0; //记录已保存的客户的数量
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public customerList(int totalCustomer){
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customers=new customer[totalCustomer];
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}
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public boolean addcustomer(customer customes){
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if (total>=customers.length){
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return false;
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}
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customers[total++]=customes;
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return true;
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}
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public boolean replacecustomer(int index,customer cust){
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if (index<0 || index>=total){
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return false;
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}
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customers[index]=cust;
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return true;
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}
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public boolean deletecustomer(int index){
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if (index<0 || index>=total){
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return false;
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}
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for (int i=0;i<total-1;i++){
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customers[i]=customers[i+1];
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}
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customers[--total]=null;
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return true;
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}
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public customer[] getAllCustomers(){
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customer[] custs=new customer[total];
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for (int i=0;i<total;i++){
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custs[i]=customers[i];
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}
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return custs;
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}
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public customer getCustomer(int index){
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if (index<0 || index>=total){
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return null;
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}
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return customers[index];
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}
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public int getTotal(){
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return total;
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}
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}
customerView文件,实现主界面实现和逻辑交互
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package customer.ui;
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import customer.bean.customer;
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import customer.service.customerList;
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import customer.util.CMUtil;
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public class customerview {
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private customerList customers=new customerList(10);
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public customerview(){
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customer cust=new customer("张三", '男', 30, "010-56253825",
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"abc@email.com");
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customers.addcustomer(cust);
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}
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public void enterMainMenu(){
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boolean loopFlag = true;
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do {
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System.out.println("\n-----------------客户信息管理软件-----------------\n");
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System.out.println(" 1 添 加 客 户");
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System.out.println(" 2 修 改 客 户");
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System.out.println(" 3 删 除 客 户");
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System.out.println(" 4 客 户 列 表");
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System.out.println(" 5 退 出\n");
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System.out.print(" 请选择(1-5):");
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char key = CMUtil.readMenuSelection();
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System.out.println();
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switch (key) {
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case '1':
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addNewCustomer();
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break;
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case '2':
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modifyCustomer();
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break;
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case '3':
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deleteCustomer();
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break;
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case '4':
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listAllCustomers();
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break;
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case '5':
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System.out.print("确认是否退出(Y/N):");
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char yn = CMUtil.readConfirmSelection();
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if (yn == 'Y')
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loopFlag = false;
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break;
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}
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} while (loopFlag);
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}
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private void addNewCustomer() {
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System.out.println("---------------------添加客户---------------------");
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System.out.print("姓名:");
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String name = CMUtil.readString(4);
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System.out.print("性别:");
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char gender = CMUtil.readChar();
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System.out.print("年龄:");
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int age = CMUtil.readInt();
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System.out.print("电话:");
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String phone = CMUtil.readString(15);
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System.out.print("邮箱:");
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String email = CMUtil.readString(30);
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customer cust = new customer(name, gender, age, phone, email);
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boolean flag = customers.addcustomer(cust);
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if (flag) {
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System.out
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.println("---------------------添加完成---------------------");
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} else {
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System.out.println("----------------记录已满,无法添加-----------------");
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}
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}
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private void modifyCustomer() {
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System.out.println("---------------------修改客户---------------------");
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int index = 0;
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customer cust = null;
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for (;;) {
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System.out.print("请选择待修改客户编号(-1退出):");
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index = CMUtil.readInt();
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if (index == -1) {
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return;
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}
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cust = customers.getCustomer(index - 1);
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if (cust == null) {
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System.out.println("无法找到指定客户!");
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} else
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break;
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}
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System.out.print("姓名(" + cust.getName() + "):");
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String name = CMUtil.readString(4, cust.getName());
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System.out.print("性别(" + cust.getGender() + "):");
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char gender = CMUtil.readChar(cust.getGender());
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System.out.print("年龄(" + cust.getAge() + "):");
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int age = CMUtil.readInt(cust.getAge());
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System.out.print("电话(" + cust.getPhone() + "):");
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String phone = CMUtil.readString(15, cust.getPhone());
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System.out.print("邮箱(" + cust.getEmail() + "):");
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String email = CMUtil.readString(15, cust.getEmail());
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cust = new customer(name, gender, age, phone, email);
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boolean flag = customers.replacecustomer(index - 1, cust);
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if (flag) {
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System.out
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.println("---------------------修改完成---------------------");
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} else {
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System.out.println("----------无法找到指定客户,修改失败--------------");
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}
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}
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private void deleteCustomer() {
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System.out.println("---------------------删除客户---------------------");
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int index = 0;
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customer cust = null;
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for (;;) {
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System.out.print("请选择待删除客户编号(-1退出):");
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index = CMUtil.readInt();
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if (index == -1) {
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return;
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}
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cust = customers.getCustomer(index - 1);
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if (cust == null) {
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System.out.println("无法找到指定客户!");
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} else
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break;
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}
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System.out.print("确认是否删除(Y/N):");
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char yn = CMUtil.readConfirmSelection();
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if (yn == 'N')
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return;
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boolean flag = customers.deletecustomer(index - 1);
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if (flag) {
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System.out
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.println("---------------------删除完成---------------------");
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} else {
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System.out.println("----------无法找到指定客户,删除失败--------------");
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}
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}
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private void listAllCustomers() {
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System.out.println("---------------------------客户列表---------------------------");
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customer[] custs = customers.getAllCustomers();
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if (custs.length == 0) {
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System.out.println("没有客户记录!");
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} else {
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System.out.println("编号\t姓名\t性别\t年龄\t\t电话\t\t邮箱");
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for (int i = 0; i < custs.length; i++) {
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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());
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//System.out.println((i+1) + "\t" + custs[i].getDetails());
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}
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}
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System.out.println("-------------------------客户列表完成-------------------------");
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}
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public static void main(String[] args) {
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customerview cView = new customerview();
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cView.enterMainMenu();
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}
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}
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文章来源: blog.csdn.net,作者:小小谢先生,版权归原作者所有,如需转载,请联系作者。
原文链接:blog.csdn.net/xiewenrui1996/article/details/108376949
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