java小程序客户信息管理软件数组实现

ゞ浴缸里的玫瑰 2022-07-15 12:05 154阅读 0赞

java小程序：客户信息管理软件，主要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。

主要涉及以下知识点：  
类和对象（属性、方法及构造器）  
类的封装  
引用数组  
数组的插入、删除和替换  
对象的聚集处理  
多对象协同工作

程序目录结构：  
– cms  
– – com.cms  
– – –CustomerView.java  
– – –Customer.java  
– – –CustomerList.java  
– –com.util  
– – –CMUtility.java  
CustomerView.java

package com.cms;
    
    import com.util.CMUtility;
    
    public class CustomerView {
    
        CustomerList customers = new CustomerList(10);
    
        public void enterMainMenu(){
            boolean loopFlag=true;
            while(loopFlag){
                System.out.println("-----------------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");
                System.out.println("-------------------请选择(1-5)：------------------");
                char c=CMUtility.readMenuSelection();
                switch (c) {
                case '1':
                    addNewCustomer();
                    break;
                case '2':
                    modifyCustomer();
                    break;
                case '3':
                    deleteCustomer();
                    break;
                case '4':
                    listAllCustomers();
                    break;
                case '5':
                    System.out.println("是否確認退出？（Y/N）");
                    char s=CMUtility.readConfirmSelection();
                    if(s=='Y'){
                        System.out.println("谢谢");
                        loopFlag=false;
                    }
                    break;
                }
            }
        } 
        // 添加客户
        private void addNewCustomer() {
            System.out.println("---------------------添加客户---------------------");
            System.out.print("姓名：");
            String name = CMUtility.readString(4);
            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(11);
            System.out.print("邮箱：");
            String email = CMUtility.readString(20);
            Customer customer = new Customer(name, gender, age, phone, email);
            boolean bl = customers.addCustomer(customer);
            if (bl) {
                System.out.println("---------------------添加完成---------------------");
                enterMainMenu();
            } else {
                System.out.println("---------------------添加失败---------------------");
            }
        } 
        // 修改客户
        private void modifyCustomer(){
            System.out.println("---------------------修改客户---------------------");
            System.out.println("请选择待修改客户编号(-1退出):");
            int cusNum = CMUtility.readInt(2);
            if (cusNum == -1) {
                enterMainMenu();
            } else {
                Customer cust = customers.getCustomer(cusNum);
                System.out.print("姓名(" + cust.getName() + "):");
                String name = CMUtility.readString(4);
                System.out.print("性别(" + cust.getGender() + "):");
                char gender = CMUtility.readChar();
                System.out.print("年龄(" + cust.getAge() + "):");
                int age = CMUtility.readInt();
                System.out.print("电话(" + cust.getPhone() + "):");
                String phone = CMUtility.readString(11);
                System.out.print("邮箱(" + cust.getEmail() + "):");
                String email = CMUtility.readString(20);
                Customer customer = new Customer(name, gender, age, phone, email);
                boolean bl = customers.replaceCustomer(cusNum, customer);
                if (bl) {
                    System.out.println("---------------------修改完成---------------------");
                    enterMainMenu();
                } else {
                    System.out.println("---------------------修改失败---------------------");
                    enterMainMenu();
                }
            }
        } 
        // 删除客户
        private void deleteCustomer(){
            System.out.println("---------------------删除客户---------------------");
            System.out.print("请选择待删除客户编号(-1退出)：");
            int index = CMUtility.readInt(2);
            if (index == -1) {
                enterMainMenu();
            } else {
                System.out.println("确认是否删除(Y/N)：");
                String yn = CMUtility.readString(1);
                if (yn == "y" || yn == "Y" || yn.equals("y") || yn.equals("Y")) {
                    boolean bl = customers.deleteCustomer(index);
                    if (bl) {
                        System.out.println("---------------------删除完成---------------------");
                        enterMainMenu();
                    }
                } else if (yn == "n" || yn == "N") {
                    System.out.println("---------------------取消删除---------------------");
                    enterMainMenu();
                }
            }
        } 
        // 获取客户列表
        private void listAllCustomers(){
            System.out.println("---------------------------客户列表---------------------------");
            System.out.println("编号 姓名 性别 年龄 电话 邮箱");
            Customer[] customer = customers.getAllCustomers();
            int index = 1;
            for (Customer custo : customer) {
                if (custo != null) {
                    System.out.println(index + " " + custo.getName() + " " + custo.getGender() + " "
                            + custo.getAge() + " " + custo.getPhone() + " " + custo.getEmail());
                    index++;
                }
            }
            System.out.println("-------------------------客户列表完成-------------------------");
            enterMainMenu();
        } 
    
        public static void main(String[] args){
            CustomerView2 cv2=new CustomerView2();
            cv2.enterMainMenu();
        } 
    }

CustomerList.java

package com.cms;
    
    public class CustomerList { 
    
        Customer[] customers;// 用来保存客户对象的数组
        int total = 0;// 记录已保存客户对象的数量
    
        public CustomerList(int totalCustomer) {
            customers = new Customer[totalCustomer];
        }
    
        public boolean addCustomer(Customer customer) {
            if (total == customers.length)
                return false;
            customers[total++] = customer;
            return true;
        }
    
        /** * * @param index 从0开始 * @return */
        public Customer getCustomer(int index) {
            if(index<0 ||index>total-1)return null;
            return customers[index];
        }
    
        public boolean replaceCustomer(int index, Customer cust) {
            if(index<0 ||index>total-1)return false;
            customers[index]=cust;
            return true;
        }
    
        public boolean deleteCustomer(int index) {
            if(index<0 ||index>total-1)return false;
            for(int i=index;i<total-1;i++){
                customers[i]=customers[i+1];
            }
            customers[--total]=null;
            return true;
        }
    
        public Customer[] getAllCustomers() {
            Customer[] array=new Customer[total];
            for(int i=0;i<array.length;i++){
                array[i]=customers[i];
            }
            return array;
        }
    }

Customer.java

package com.cms;
    
    public class Customer { 
    
        // 客户姓名
        private String name;
        // 性别
        private char gender;
        // 年龄
        private int age;
        // 电话号码
        private String phone;
        // 邮箱
        private String email;
    
    
    
        public Customer(String name, char gender, int age, String phone, String email) {
            super();
            this.name = name;
            this.gender = gender;
            this.age = age;
            this.phone = phone;
            this.email = email;
        }
    
        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;
        }
    
        @Override
        public String toString() {
            return "Customer [name=" + name + ", gender=" + gender + ", age=" + age + ", phone=" + phone + ", email="
                    + email + "]";
        }
    
    }

工具类CMUtility.java

package com.util;
    
    import java.util.*;
    
    public class CMUtility {
        private static Scanner scanner = new Scanner(System.in);
    
        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;
        }
    
        public static char readChar() {
            String str = readKeyBoard(1, false);
            return str.charAt(0);
        }
    
        public static char readChar(char defaultValue) {
            String str = readKeyBoard(1, true);
            return (str.length() == 0) ? defaultValue : str.charAt(0);
        }
    
        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;
        }
    
        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;
        }
    
        public static String readString(int limit) {
            return readKeyBoard(limit, false);
        }
    
        public static String readString(int limit, String defaultValue) {
            String str = readKeyBoard(limit, true);
            return str.equals("")? defaultValue : str;
        }
    
        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;
        }
    }

--------------------

小结：  
1. 数组、list、map：数组是最快的  
2. 原来写过类似的，把客户信息放在txt里了，今天把客户信息都存在数组里了，这个更好操作，方便又快，里面用到了不少东西。

--------------------

后语：  
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