Gin的基本入门案例：

package main

import (
	"github.com/gin-gonic/gin"
    "net/http"
)

func main() {
	router := gin.Default()
	//
	//http://127.0.0.1:8080/params?firstname=lcd&lastname=dong
    router.GET("/params", func(c *gin.Context) {
        firstname := c.DefaultQuery("firstname","defaultName")
            lastname := c.Query("lastname")
            c.JSON(http.StatusOK, gin.H{
                "firstName":firstname,
                "lastName":lastname,
            })
	})
	//
	//http://127.0.0.1:8080/user/lcd
	router.GET("/user/:name", func(c *gin.Context) {
		name := c.Param("name")
		c.JSON(http.StatusOK, gin.H{
			"name": name,
		})
	})
	//
	//http://127.0.0.1:8080/form_post
	router.POST("/form_post", func(c *gin.Context) {
		name := c.PostForm("name")
		nick := c.DefaultPostForm("age", "90")
		c.JSON(200, gin.H{
			"name": name,
			"age":  nick,
		})
	})
	//
	//http://127.0.0.1:8080/json_post
	router.POST("/json_post", func(c *gin.Context) {
		type User struct {
			Username string `form:"username" json:"username"`
			Password string `form:"passwd" json:"passwd"`
			Age int `form:"age" json:"age"`
		}
		//
		var user User
		c.BindJSON(&user)
		c.JSON(200, gin.H{
			"data": user,
		})
	})
	//
    router.Run("0.0.0.0:8080")
}

编译运行：

go run main.go

go build main.go

参考：

https://segmentfault.com/a/1190000019972283?utm_source=tag-newest