第一步初始化
1.新建文件夹(项目名)
2.终端进入该项目,敲 go mod init gin-class 产生go.mode文件
3.golang打开,Go Modules设置GOPROXY=https://goproxy.io
4.新建mian.go,下面代码粘贴进去
5.运行
package main import "github.com/gin-gonic/gin" func main() { r := gin.Default() r.GET("/ping", func(c *gin.Context) { c.JSON(200, gin.H{ "message": "pong", }) }) r.Run() // listen and serve on 0.0.0.0:8080 }
修改启动端口
# 默认是8080端口 r.Run(":8888")
get请求url取参数
//get请求 "/get/123?user=jeff&pwd=admin" r.GET("/get/:id", func(c *gin.Context) { id := c.Param("id") user := c.DefaultQuery("user","jeff") pwd := c.Query("pwd") c.JSON(200, gin.H{ "message": "hell gyy", "id":id, "user":user, "pwd":pwd, }) })
Param
:取“?”之前的参数
Query
:取“?”之后的参数
DefaultQuery
:优先取key值,没有就用默认值
Post请求获取form参数
r.POST("/post", func(c *gin.Context) { user := c.DefaultPostForm("user","jeff") pwd := c.PostForm("pwd") c.JSON(200, gin.H{ "message": "hell gyy", "user":user, "pwd":pwd, }) })
DefaultPostForm
:优先取key值,没有就用默认值
PostForm
:取key
模型绑定ShouldBind
ShouldBindJSON
package main import "github.com/gin-gonic/gin" type PostParams struct { Name string `json:"name"` Age int `json:"age"` Sex bool `json:"sex"` } func main() { r.POST("/testBind", func(c *gin.Context) { p := PostParams{} err := c.ShouldBindJSON(&p) if err != nil{ c.JSON(400,gin.H{ "msg":"出错!", "data":gin.H{}, }) }else{ c.JSON(200,gin.H{ "msg":"success", "data":p, }) } c.JSON(200, gin.H{ }) }) r.Run(":8888") // listen and serve on 0.0.0.0:8080 }
ShouldBinduri
package main import "github.com/gin-gonic/gin" func main() { r := gin.Default() //携带中间件启动路由 r.POST("/testBind/:name/:age/:sex", func(c *gin.Context) { p := PostParams{} err := c.ShouldBindUri(&p) if err != nil{ c.JSON(400,gin.H{ "msg":"出错!", "data":gin.H{}, }) }else{ c.JSON(200,gin.H{ "msg":"success", "data":p, }) } c.JSON(200, gin.H{ }) }) r.Run(":8888") // listen and serve on 0.0.0.0:8080 } type PostParams struct { Name string `json:"name" uri:"name"` Age int `json:"age" uri:"age"` Sex bool `json:"sex" uri:"ses"` }
ShouldBindQuery
package main import "github.com/gin-gonic/gin" func main() { r := gin.Default() //携带中间件启动路由 r.POST("/testBind", func(c *gin.Context) { p := PostParams{} err := c.ShouldBindQuery(&p) if err != nil{ c.JSON(400,gin.H{ "msg":"出错!", "data":gin.H{}, }) }else{ c.JSON(200,gin.H{ "msg":"success", "data":p, }) } c.JSON(200, gin.H{ }) }) r.Run(":8888") // listen and serve on 0.0.0.0:8080 } type PostParams struct { Name string `json:"name" uri:"name" form:"name"` Age int `json:"age" uri:"age" form:"age"` Sex bool `json:"sex" uri:"ses" form:"sex"` }
自定义验证器,表单验证
binding:"required,mustBig"
package main import ( "github.com/gin-gonic/gin" "github.com/gin-gonic/gin/binding" "github.com/go-playground/validator/v10" ) type PostParams struct { Name string `json:"name" uri:"name" form:"name"` Age int `json:"age" uri:"age" form:"age" binding:"required,mustBig"` Sex bool `json:"sex" uri:"ses" form:"sex"` } // 过滤年龄小于18 func mustBig(f1 validator.FieldLevel) bool { if f1.Field().Interface().(int) <=18{ return false } return true } func main() { r := gin.Default() //携带中间件启动路由 if v, ok := binding.Validator.Engine().(*validator.Validate); ok { v.RegisterValidation("mustBig", mustBig) } r.POST("/testBind", func(c *gin.Context) { p := PostParams{} err := c.ShouldBindJSON(&p) if err != nil{ c.JSON(400,gin.H{ "msg":"小于18岁了!", "data":gin.H{}, }) }else{ c.JSON(200,gin.H{ "msg":"success", "data":p, }) } c.JSON(200, gin.H{ }) }) r.Run(":8888") // listen and serve on 0.0.0.0:8080 }
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