一、安装

GitHub gin框架
GitHub - gin-gonic/gin: Gin is a HTTP web framework written in Go (Golang). It features a Martini-like API with much better performance — up to 40 times faster. If you need smashing performance, get yourself some Gin.

下载并安装Gin

go get -u github.com/gin-gonic/gin

二、示例

package main
import (
    "github.com/gin-gonic/gin"
)
func main() {
    // 创建一个默认的路由引擎
    r := gin.Default()
    // GET：请求方式；/hello：请求的路径
    // 当客户端以GET方法请求/hello路径时，会执行后面的匿名函数
    r.GET("/hello", func(c *gin.Context) {
        // c.JSON：返回JSON格式的数据
        c.JSON(200, gin.H{
            "message": "Hello world!",
        })
    })
    // 启动HTTP服务，默认在0.0.0.0:8080启动服务
    r.Run()
}