前提说明
大家都知道，Go语言是云原生技术的主力语言，因此想要更好的学习并掌握云原生技术的前提是能熟练的使用Go语言，今天就带大家再次使用Go语言搭建一个简单的Restful风格的后端服务，其中包含CRUD功能，但是由于能更方便快速的开发完成，web层使用了Gin框架，dao层，即数据库访问层的代码就没有进行数据库的连接，直接操作内存做数据的增删改查，如有详细教程的需要请留言哈~
好滴，废话不多说，在学习这篇文章之前建议大家先了解下除了Go基本语法和设计规范以外，还有Restful的一些要点和Gin框架的基础，这里我就推荐下相关文章吧：
Gin框架：
Restful要点：
具体代码
安装Gin
go get -u github.com/gin-gonic/gin
项目结构：
cmd/web/main.go
package main import ( "go_restful/pkg/web" ) func main() { web.RouterGroup("7000") }
pkg/model/user.go
package model type User struct { Id int64 `json:"id"` Name string `json:"name"` Age int `json:"age"` }
pkg/dao/user_dao.go
package dao import ( "context" "go_restful/pkg/model" "log" ) var users []*model.User func init() { userList := make([]*model.User, 0) userList = append(userList, &model.User{Id: 1, Name: "zs", Age: 23}) userList = append(userList, &model.User{Id: 2, Name: "ls", Age: 24}) userList = append(userList, &model.User{Id: 3, Name: "ww", Age: 25}) users = userList } type UserDAO interface { CreateUser(ctx context.Context, user *model.User) (bool, error) List(ctx context.Context) ([]*model.User, error) GetUserById(ctx context.Context, id int64) (model.User, error) DeleteUserById(ctx context.Context, id int64) (bool, error) UpdateUserById(ctx context.Context, user model.User) (bool, error) } type UserDaoImpl struct { UserDB []*model.User } func NewUserDaoImpl() *UserDaoImpl { return &UserDaoImpl{users} } func (u UserDaoImpl) CreateUser(ctx context.Context, user *model.User) (bool, error) { users = append(u.UserDB, user) printUsers() return true, nil } func (u UserDaoImpl) List(ctx context.Context) ([]*model.User, error) { return u.UserDB, nil } func (u UserDaoImpl) GetUserById(ctx context.Context, id int64) (model.User, error) { return *u.UserDB[id-1], nil } func (u UserDaoImpl) DeleteUserById(ctx context.Context, id int64) (bool, error) { newList := make([]*model.User, 0) for i := range u.UserDB { if i+1 != int(id) { newList = append(newList, u.UserDB[i]) } } users = newList printUsers() return true, nil } func (u UserDaoImpl) UpdateUserById(ctx context.Context, user model.User) (bool, error) { newList := make([]*model.User, 0) for i := range u.UserDB { if i+1 == int(user.Id) { newList = append(newList, &user) } else { newList = append(newList, u.UserDB[i]) } } users = newList printUsers() return true, nil } func printUsers() { for i := range users { log.Print(users[i]) } }
pkg/web/controller/user_controller.go
package controller import ( "context" "encoding/json" "github.com/gin-gonic/gin" "go_restful/pkg/model" "go_restful/pkg/web/controller/impl" "io/ioutil" "log" "strconv" ) type UserController interface { CreateUser(ctx context.Context, user model.User) (bool, error) List(ctx context.Context) ([]*model.User, error) GetUserById(ctx context.Context, id int64) (model.User, error) DeleteUserById(ctx context.Context, id int64) (bool, error) UpdateUserById(ctx context.Context, user model.User) (bool, error) } //CreateUser 添加User func CreateUser(c *gin.Context) { body := c.Request.Body bytes, err := ioutil.ReadAll(body) user := model.User{} json.Unmarshal(bytes, &user) impl.MyUserControllerImpl.CreateUser(c, &user) if err != nil { log.Println(err) } c.JSON(200, "success") } //List 查看全部 func List(c *gin.Context) { list, err := impl.MyUserControllerImpl.List(c) if err != nil { log.Println(err) } c.JSON(200, list) } //GetUserById 根据ID查看 func GetUserById(c *gin.Context) { id := c.Param("id") intid, _ := strconv.Atoi(id) user, err := impl.MyUserControllerImpl.GetUserById(c, int64(intid)) if err != nil { log.Println(err) } c.JSON(200, user) } //DeleteUserById 根据ID删除 func DeleteUserById(c *gin.Context) { id := c.Param("id") intid, _ := strconv.Atoi(id) res, err := impl.MyUserControllerImpl.DeleteUserById(c, int64(intid)) if err != nil { log.Println(err) } c.JSON(200, res) } //UpdateUserById 根据Id修改 func UpdateUserById(c *gin.Context) { body := c.Request.Body bytes, err := ioutil.ReadAll(body) user := model.User{} json.Unmarshal(bytes, &user) if err != nil { log.Println(err) } res, err := impl.MyUserControllerImpl.UpdateUserById(c, user) c.JSON(200, res) }
pkg/web/controller/impl/user_controller.go
package impl import ( "context" "go_restful/pkg/dao" "go_restful/pkg/model" ) type UserControllerImpl struct { dao *dao.UserDaoImpl } var MyUserControllerImpl *UserControllerImpl func NewUserControllerImpl() *UserControllerImpl { return &UserControllerImpl{ dao: dao.NewUserDaoImpl(), } } func init() { MyUserControllerImpl=NewUserControllerImpl() } func (u UserControllerImpl) CreateUser(ctx context.Context, user *model.User) (bool, error) { return u.dao.CreateUser(ctx, user) } func (u UserControllerImpl) List(ctx context.Context) ([]*model.User, error) { return u.dao.List(ctx) } func (u UserControllerImpl) GetUserById(ctx context.Context, id int64) (model.User, error) { return u.dao.GetUserById(ctx, id) } func (u UserControllerImpl) DeleteUserById(ctx context.Context, id int64) (bool, error) { return u.dao.DeleteUserById(ctx, id) } func (u UserControllerImpl) UpdateUserById(ctx context.Context, user model.User) (bool, error) { return u.dao.UpdateUserById(ctx, user) }
pkg/web/router.go
package web import ( "github.com/gin-gonic/gin" "go_restful/pkg/web/controller" ) func RouterGroup(port string) { r := gin.Default() router := r.Group("/") { router.POST("/save", controller.CreateUser) router.GET("/list", controller.List) router.GET("/get/:id", controller.GetUserById) router.PUT("/update}", controller.UpdateUserById) router.DELETE("/delete/:id", controller.DeleteUserById) } r.Run("127.0.0.1:" + port) }
最后大家自行测试吧~
