go语言web框架gin安装(go mod方式)

开门见山，直接上步骤：

1. 开启go mod
   export GO111MODULE=on
2. 初始化go mod
   mkdir /Project/ginProject && cd /Project/ginProject
   go mod init ginLog(名字自定义)
3. 配置 Go modules proxy
   由于国内的网络问题，go mod 在拉取项目时最好开启代理服务，这里使用阿里云提供的服务：
   export GOPROXY=https://mirrors.aliyun.com/goproxy/
4. 在当前目录下编写代码
   vim main.go

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
}

5. 编译代码 go mod 会自动拉取项目中引入的包
   go build main.go

[root@www ginProject]# go build main.go
go: finding github.com/gin-gonic/gin v1.4.0
go: downloading github.com/gin-gonic/gin v1.4.0
go: extracting github.com/gin-gonic/gin v1.4.0
go: finding github.com/golang/protobuf v1.3.1
go: finding github.com/stretchr/testify v1.3.0
go: finding gopkg.in/go-playground/validator.v8 v8.18.2
go: finding gopkg.in/go-playground/assert.v1 v1.2.1
go: finding golang.org/x/net v0.0.0-20190503192946-f4e77d36d62c
go: finding github.com/ugorji/go v1.1.4
...

6. 运行gin
   ./main

参考链接：https://linkjian.com/post/use-gomod-for-gin/