go Gin安裝及初始化操作示例
第一步初始化
1.新建文件夾(項(xiàng)目名)
2.終端進(jìn)入該項(xiàng)目,敲 go mod init gin-class 產(chǎn)生go.mode文件
3.golang打開(kāi),Go Modules設(shè)置GOPROXY=https://goproxy.io
4.新建mian.go,下面代碼粘貼進(jìn)去
5.運(yùn)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
}
修改啟動(dòng)端口
# 默認(rèn)是8080端口
r.Run(":8888")
get請(qǐng)求url取參數(shù)
//get請(qǐng)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“?”之前的參數(shù)
Query:取“?”之后的參數(shù)
DefaultQuery:優(yōu)先取key值,沒(méi)有就用默認(rèn)值
Post請(qǐng)求獲取form參數(shù)
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 :優(yōu)先取key值,沒(méi)有就用默認(rèn)值
PostForm:取key
模型綁定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":"出錯(cuò)!",
"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() //攜帶中間件啟動(dòng)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":"出錯(cuò)!",
"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() //攜帶中間件啟動(dòng)路由
r.POST("/testBind", func(c *gin.Context) {
p := PostParams{}
err := c.ShouldBindQuery(&p)
if err != nil{
c.JSON(400,gin.H{
"msg":"出錯(cuò)!",
"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"`
}

自定義驗(yàn)證器,表單驗(yàn)證
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"`
}
// 過(guò)濾年齡小于18
func mustBig(f1 validator.FieldLevel) bool {
if f1.Field().Interface().(int) <=18{
return false
}
return true
}
func main() {
r := gin.Default() //攜帶中間件啟動(dòng)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歲了!",
"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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