总计架构图:
model/customer.go
package model
import (
"fmt"
)
type Customer struct {
Id int
Name string
Gender string
Age int
Phone string
Email string
}
func NewCustomer(id int, name string, gender string, age int, phone string, email string) Customer {
return Customer{
Id: id,
Name: name,
Gender: gender,
Age: age,
Phone: phone,
Email: email,
}
}
func NewCustomer2(name string, gender string, age int, phone string, email string) Customer {
return Customer{
Name: name,
Gender: gender,
Age: age,
Phone: phone,
Email: email,
}
}
func (c Customer) GetInfo() string {
info := fmt.Sprintf("%v\t%v\t%v\t%v\t%v\t%v\t", c.Id, c.Name, c.Gender, c.Age, c.Phone, c.Email)
return info
}
service/customerService.go
package service
import (
"go_code/project_6/model"
)
//增删查改
type CustomerService struct {
customers []model.Customer
customerId int
}
func NewCustomerService() *CustomerService {
customerService := &CustomerService{}
customerService.customerId = 1
customer := model.NewCustomer(1, "张三", "男", 20, "15927776543", "347688971@qq.com")
customerService.customers = append(customerService.customers, customer)
return customerService
}
func (cs *CustomerService) List() []model.Customer {
return cs.customers
}
func (cs *CustomerService) Add(customer model.Customer) bool {
//确定一个添加id的规则,就是添加的顺序
cs.customerId++
customer.Id = cs.customerId
cs.customers = append(cs.customers, customer)
return true
}
//根据Id查找客户在切片中的对应下标,如果没有则返回-1
func (cs *CustomerService) FindById(id int) int {
index := -1
for i := 0; i < len(cs.customers); i++ {
if cs.customers[i].Id == id {
//找到了
index = i
}
}
return index
}
//根据Id删除客户
func (cs *CustomerService) Delete(id int) bool {
index := cs.FindById(id)
if index == -1 {
return false
}
//从切片中删除元素
cs.customers = append(cs.customers[:index], cs.customers[index+1:]...)
return true
}
func (cs *CustomerService) GetinfoById(id int) model.Customer {
i := id - 1
return cs.customers[i]
}
//根据id修改客户信息
func (cs *CustomerService) Update(id int, customer model.Customer) bool {
for i := 0; i < len(cs.customers); i++ {
if cs.customers[i].Id == id {
cs.customers[i].Name = customer.Name
cs.customers[i].Gender = customer.Gender
cs.customers[i].Age = customer.Age
cs.customers[i].Phone = customer.Phone
cs.customers[i].Email = customer.Email
}
}
return true
}
view/customerView.go
package main
import (
"fmt"
"go_code/project_6/model"
"go_code/project_6/service"
)
type customerView struct {
//定义必要的字段
key string //接受用户输入
loop bool //用于循环判断
customerService *service.CustomerService
}
func (cv *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(&cv.key)
switch cv.key {
case "1":
cv.add()
case "2":
cv.update()
case "3":
cv.delete()
case "4":
cv.list()
case "5":
cv.logout()
default:
fmt.Println("你的输入有误,请重新输入")
}
if !cv.loop {
break
}
}
fmt.Println("你已退出了客户关系管理系统。。。")
}
func (cv *customerView) list() {
//首先获取当前客户所有信息
customers := cv.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\t邮箱")
for i := 0; i < len(customers); i++ {
fmt.Println(customers[i].GetInfo())
}
fmt.Println("------------------客户列表完成------------------------")
}
func (cv *customerView) add() {
fmt.Println("--------------------添加客户--------------------------")
fmt.Print("姓名:")
name := ""
fmt.Scanln(&name)
fmt.Print("性别:")
gender := ""
fmt.Scanln(&gender)
fmt.Print("年龄:")
age := 0
fmt.Scanln(&age)
fmt.Print("电话:")
phone := ""
fmt.Scanln(&phone)
fmt.Print("邮箱:")
email := ""
fmt.Scanln(&email)
customer := model.NewCustomer2(name, gender, age, phone, email)
if cv.customerService.Add(customer) {
fmt.Println("--------------------添加成功--------------------------")
} else {
fmt.Println("--------------------添加失败--------------------------")
}
fmt.Println("--------------------添加完成--------------------------")
}
func (cv *customerView) delete() {
fmt.Println("--------------------删除客户--------------------------")
fmt.Println("请选择要删除客户的客户编号(-1退出):")
id := -1
fmt.Scanln(&id)
if id == -1 {
return
}
fmt.Println("确认是否删除?y/n")
choice := ""
fmt.Scanln(&choice)
if choice == "y" || choice == "n" {
if cv.customerService.Delete(id) {
fmt.Println("--------------------删除完成--------------------------")
} else {
fmt.Println("-----------------输入id不存在,请重新输入--------------")
}
}
}
func (cv *customerView) update() {
fmt.Print("请输入要修改的id:")
id := 0
fmt.Scanln(&id)
if cv.customerService.FindById(id) != -1 {
customer := cv.customerService.GetinfoById(id)
fmt.Printf("姓名(%v:)", customer.Name)
name := ""
fmt.Scanln(&name)
fmt.Printf("性别(%v):", customer.Gender)
gender := ""
fmt.Scanln(&gender)
fmt.Printf("年龄(%v):", customer.Age)
age := 0
fmt.Scanln(&age)
fmt.Printf("电话(%v):", customer.Phone)
phone := ""
fmt.Scanln(&phone)
fmt.Printf("邮箱(%v):", customer.Email)
email := ""
fmt.Scanln(&email)
customer2 := model.NewCustomer2(name, gender, age, phone, email)
cv.customerService.Update(id, customer2)
} else {
fmt.Println("-----------------输入id不存在,请重新输入--------------")
}
}
func (cv *customerView) logout() {
fmt.Println("确认是否退出?y/n")
for {
fmt.Scanln(&cv.key)
if cv.key == "y" || cv.key == "n" {
break
}
fmt.Println("你的输入有误,请从新输入")
}
if cv.key == "y" {
cv.loop = false
}
}
func main() {
var cv customerView
cv.loop = true
cv.customerService = service.NewCustomerService()
cv.mainMenu()
}
由于代码都比较基础,就不一一介绍了,很容易看懂。我们运行程序:
先选择4:我们已经初始化了一条数据。
再选择1添加一条数据:
再选择4查看一下:
数据确实已经添加成功,我们再选择3,删除一条数据:
再查看一下:
确实已经删除,然后我们选择2修改数据:
再查看一下:
已经修改了,最后我们选择5进行退出:
总结:通过golang实现的客户信息管理系统。学习一门语言最好的方式就是通过一个实际的例子。通过这个实例,不仅可以进一步巩固golang的相关基础技能,同时,也能让我们加强自己的逻辑能力,从一步步的调用函数,掌握参数传递和接收技巧。