How to build a Golang RESTful API and implement CRUD operations?

By creating a Golang project and installing the necessary packages, we can build a fully functional RESTful API. It uses the MySQL database for CRUD operations: 1. Create and connect to the database; 2. Define the data structure; 3. Set routing and handle HTTP requests; 4. Implement CRUD operations.

How to build Golang RESTful API and implement CRUD operations

Introduction:
In this article In, we will learn how to build a fully functional RESTful API in Golang and use a database for CRUD (create, read, update, delete) operations.

Details:

1. Create a Golang project

go mod init rest-api

2. Install the necessary packages

import (
    "database/sql"
    "encoding/json"
    "github.com/gorilla/mux"
    "log"
    "net/http"
    "strconv"

    _ "github.com/go-sql-driver/mysql"
)

3. Configure the database

// 数据库连接字符串
const dbURI = "user:password@tcp(host:port)/database"

// 建立数据库连接，这里使用 MySQL 驱动
db, err := sql.Open("mysql", dbURI)
if err != nil {
    log.Fatal(err)
}

4. Define the data structure

type Post struct {
    ID      int    `json:"id"`

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