Go installation and configuration (1)

install

Download the installation package on the official website
Address https://golang.google.cn/dl/

When the download is complete , Execute installation file , Continue to the next step to complete the installation （ The installation position is optional ）
open cmd perform go version Check whether the version number can be queried , Here's the picture .

To configure

To configure GOPATH
Create a new folder as the workspace , Position at will , Contents in English

Create a new... In the system variable GOPATH Variable , The value is the new folder address above

because Go A default workspace is assigned during installation , In user variables , You need to remove

Then confirm one by one , Preservation
When the configuration is complete , Create three folders in the new folder

After creation, enter bin Folder copy address , In the user environment variables PATH Add bin Folder address

Change the default variable to bin Directory address
After the save go env see

vs code

Editor's words , I'm using vscode
Download from the official website and install by yourself

Open the editor , Click expand , download go Language extension

Want to download Chinese plug-ins , Search and install by yourself

Open the previously created with the editor src Folder , Open and create Folder hello, Create the file again main.go

A plug-in is also recommended here Tabnine, It can be completed automatically , Very cool

test

Start writing the first one go Program

package main

import "fmt"

func main()  {
	fmt.Println("hello	GO")
}

When writing, the prompt always pops up in the lower right corner , These things are installed go Plug ins are used to extend code , Downloading usually fails , Because these packages are on the Internet . At this time, you can set GOPROXY( agent ) Just go

cmd Execute the following two lines respectively

go env -w GO111MODULE=on

go env -w  GOPROXY=https://goproxy.cn,direct

Verify that the configuration is successful

Windows Platform press Ctrl+Shift+P,Mac Platform press Command+Shift+P, This is the time VS Code An input box will pop up , Here's the picture

Let's type... In this input box >go:install, The following will automatically search for relevant commands , We choose
Go:Install/Update Tools This command

Check and press enter to execute the command （ Or click the command with the mouse ）

After downloading , The successful output is shown in the figure ：

You can see an error here
Enter the console terminal to run the command go mod init demo( Project name , Set it up by yourself )

Save the following code to 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 (for windows "localhost:8080")
}

Next, execute the command , Will download the necessary packages

go mod tidy

You need to know more about go mod knowledge

Baidu

Then you can write the code