[大数据]客户信息系统--面向对象版本

客户关系系统：

该软件能够实现对客户对象的插入，修改和删除（用切片实现），并能够打印客户明细表


MVC架构，V--视图层  ，c--controller--控制层    M-model  连接数据库

MVC不展开讲，简要分析

V---视图---相关内容都是写在视图层这里

c--控制层【接口层】，相应调取的接口都是在这里编写

M-数据存储层--跟数据库相关的信息都是在这里编写

程序层级关系截图

1-model层代码

package model

import "fmt"

//创建客户信息结构体
type Customer struct {
	Id int
	Name string
	Gender string
	Age int
	Phone string
	Email string
}
//提供工厂模式，返回Customer
func NewCustomer(id int,name string,gender string,age int,phone string,email string) Customer  {
	customer := Customer{
		id,
		name,
		gender,
		age,
		phone,
		email,
	}
	return customer
}
//提供工厂模式，返回Customer，不携带id
func NewCustomerNotID(name string,gender string,age int,phone string,email string) Customer  {
	customer := Customer{
		Name:name,
		Gender:gender,
		Age:age,
		Phone:phone,
		Email:email,
	}
	return customer
}
//返回用户信息
func (this Customer) GetInfo() string  {
	info := fmt.Sprintf("%v\t\t%v\t%v\t\t%v\t\t%v\t\t%v\t",this.Id,this.Name,this.Gender,this.Age,this.Phone,this.Email)
	return info
}

2.接口层---c--控制层? service.go代码

package service

import (
	"fmt"
	"homeaccount/customer/model"
)

//增删改查
type  CustomerService struct {
	Customers []model.Customer
	//表示当前切片有多少客户
	customerNum int
}
//创建一个工厂模式，返回CustomerService实例
func NewCustomerService() *CustomerService  {
	customerService := CustomerService{}
	customerService.customerNum = 1
	customer := model.NewCustomer(1, "老王", "男", 20, "666", "111111@qq.com")
	customerService.Customers = append(customerService.Customers, customer)
	return &customerService
}
//返回客户切片
func (this *CustomerService) List() []model.Customer  {
	return this.Customers
}
//添加客户到customers中
func (this *CustomerService) Add(customer model.Customer) bool  {
	//将添加顺序作为客户id
	this.customerNum++
	customer.Id = this.customerNum
	this.Customers = append(this.Customers, customer)
	return true
}
//根据id查找客户下标，没有就返回一个-1
func (this *CustomerService) FindById(id int) int  {
	index := -1
	//遍历切片
	for key, _ := range this.Customers {
		if this.Customers[key].Id == id{
			index = key
		}
	}
	return index
}
//根据id删除客户
func (this *CustomerService) Delete(id int) bool {
	index := this.FindById(id)
	//判断index是否为-1
	if index == -1 {
		return false
	} else {
		this.Customers = append(this.Customers[:index],this.Customers[index+1:]...)
		return true
	}
}
//修改客户
func (this *CustomerService) Update(id int,customers model.Customer) bool {
	index := this.FindById(id)
	if index == -1 {
		return false
	} else {
		customer := this.Customers[index]

		fmt.Println(len(customers.Name))
		if len(customers.Name) == 0 {
			customers.Name = customer.Name
		}
		if len(customers.Gender) == 0 {
			customers.Gender =  customer.Gender
		}
		if customers.Age == 0 {
			customers.Age =  customer.Age
		}
		if len(customers.Phone) == 0 {
			customers.Phone =  customer.Phone
		}
		if len(customers.Email) == 0 {
			customers.Email =  customer.Email
		}
		customer = customers
		customer.Id = id
		this.Customers[index] = customer
		return true
	}
}

3.view.go视图层代码

package main

import (
	"fmt"
	"homeaccount/customer/model"
	"homeaccount/customer/service"
)

type CustomerView struct {
	//用于菜单选项
	key string
	//用于退出程序
	loop bool
	//用于添加客户名
	name string
	//用于添加客户性别
	gender string
	//用于添加客户年龄
	age int
	//用于添加客户电话
	phone string
	//用于添加客户邮箱号
	email string
	//用于删除客户的id
	id int
	//用于删除客户的确认
	choice string
	customerService *service.CustomerService
}
//显示所有客户信息
func (this *CustomerView) List()  {
	list := this.customerService.List()
	fmt.Println("----------客户列表----------")
	fmt.Println("编号\t姓名\t性别\t年龄\t电话\t邮箱")
	for key, _ := range list {
		fmt.Println(list[key].GetInfo())
	}
	fmt.Println("----------客户列表完成----------")
}
//添加用户
func (this *CustomerView) Add()  {
	fmt.Println("----------添加客户----------")
	fmt.Println("姓名:")
	fmt.Scanln(&this.name)
	fmt.Println("性别:")
	fmt.Scanln(&this.gender)
	fmt.Println("年龄:")
	fmt.Scanln(&this.age)
	fmt.Println("电话:")
	fmt.Scanln(&this.phone)
	fmt.Println("邮箱号:")
	fmt.Scanln(&this.email)
	//id是唯一的，由系统分配
	costomer := model.NewCustomerNotID(this.name,this.gender,this.age,this.phone,this.email)
	if this.customerService.Add(costomer){
		fmt.Println("----------添加成功----------")
	} else {
		fmt.Println("----------添加失败----------")
	}
}
//删除客户
func (this *CustomerView) Delete()  {
	fmt.Println("----------删除客户----------")
	fmt.Print("请选择要删除的客户编号(-1退出):")
	fmt.Scanln(&this.id)
	if this.id == -1 {
		return
	}
	//判断是否确认删除
	for  {
		fmt.Println("确认是否删除(y/n):")
		fmt.Scanln(&this.choice)
		if this.choice == "Y" || this.choice == "y"{
			if this.customerService.Delete(this.id){
				fmt.Println("----------删除成功----------")
				return
			}else {
				fmt.Println("----------删除失败,id不存在----------")
				return
			}
		} else if this.choice == "n" || this.choice == "N" {
			fmt.Println("成功取消删除")
			return
		} else {
			fmt.Println("请输入正确的选项")
		}
	}
}
//修改客户
func (this *CustomerView) Update()  {
	fmt.Println("----------修改客户----------")
	fmt.Print("请选择要修改的客户编号(-1退出):")
	fmt.Scanln(&this.id)
	if this.id == -1 {
		return
	}
	fmt.Println("姓名:")
	fmt.Scanln(&this.name)
	fmt.Println("性别:")
	fmt.Scanln(&this.gender)
	fmt.Println("年龄:")
	fmt.Scanln(&this.age)
	fmt.Println("电话:")
	fmt.Scanln(&this.phone)
	fmt.Println("邮箱号:")
	fmt.Scanln(&this.email)
	costomer := model.NewCustomerNotID(this.name,this.gender,this.age,this.phone,this.email)
	if this.customerService.Update(this.id,costomer){
		fmt.Println("----------修改成功----------")
		return
	}else {
		fmt.Println("----------修改失败,id不存在----------")
		return
	}
}
//退出客户系统
func (this *CustomerView) Exit() {
	for {
		fmt.Println("是否确认退出系统(y/n):")
		fmt.Scanln(&this.choice)
		if this.choice == "y" || this.choice == "Y" {
			fmt.Println("您退出客户信息管理软件")
			this.loop = false
			return
		} else if this.choice == "n" || this.choice == "N" {
			break
		} else {
			fmt.Println("请输入正确的选项")
		}
	}
}
//显示主菜单
func (this *CustomerView) mainMenu()  {
	for  {
		fmt.Println("----------客户信息管理软件----------")
		fmt.Println(                "1 添加客户")
		fmt.Println(                "2 修改客户")
		fmt.Println(                "3 删除客户")
		fmt.Println(                "4 客户列表")
		fmt.Println(                "5 退   出")
		fmt.Print("请选择(1~5):")
		fmt.Scanln(&this.key)
		switch this.key {
		case "1":
			this.Add()
		case "2":
			this.Update()
		case "3":
			this.Delete()
		case "4":
			this.List()
		case "5":
			this.Exit()
		default:
			fmt.Println("请输入正确的选项")
		}
		if this.loop == false {
			return
		}
	}
}
func main() {
	view := CustomerView{
		key:"",
		loop:true,
		name:"",
		gender:"",
		age:0,
		phone:"",
		id:-1,
		choice:"",
	}
	//对customerService初始化
	view.customerService = service.NewCustomerService()
	//显示主菜单
	view.mainMenu()
}

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