Golang RestApi Mysql插入查询

package main

import (
    "database/sql"
    "fmt"
    "log"

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

type User struct {
    ID   int
    Name string
    Age  int
}

func main() {
    // 连接到Mysql数据库
    db, err := sql.Open("mysql", "username:password@tcp(hostname:port)/database")
    if err != nil {
        log.Fatal(err)
    }
    defer db.Close()

    // 插入数据
    insertStmt, err := db.Prepare("INSERT INTO users(name, age) VALUES(?, ?)")
    if err != nil {
        log.Fatal(err)
    }
    defer insertStmt.Close()

    _, err = insertStmt.Exec("John Doe", 30)
    if err != nil {
        log.Fatal(err)
    }

    // 查询数据
    rows, err := db.Query("SELECT * FROM users")
    if err != nil {
        log.Fatal(err)
    }
    defer rows.Close()

    var users []User
    for rows.Next() {
        var user User
        err := rows.Scan(&user.ID, &user.Name, &user.Age)
        if err != nil {
            log.Fatal(err)
        }
        users = append(users, user)
    }

    for _, user := range users {
        fmt.Printf("ID: %d, Name: %s, Age: %d\n", user.ID, user.Name, user.Age)
    }
}