go语言 实现mysql协议

package main

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

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

func main() {
    // 连接字符串格式：username:password@protocol(address)/dbname?charset=utf8
    dsn := "username:password@tcp(127.0.0.1:3306)/dbname?charset=utf8"
    db, err := sql.Open("mysql", dsn)
    if err != nil {
        log.Fatal(err)
    }
    defer db.Close()

    // 测试数据库连接
    err = db.Ping()
    if err != nil {
        log.Fatal(err)
    }

    fmt.Println("Successfully connected to MySQL server!")

    // 执行SQL查询
    rows, err := db.Query("SELECT id, name FROM users")
    if err != nil {
        log.Fatal(err)
    }
    defer rows.Close()

    // 遍历结果集
    for rows.Next() {
        var id int
        var name string
        err = rows.Scan(&id, &name)
        if err != nil {
            log.Fatal(err)
        }
        fmt.Printf("ID: %d, Name: %s\n", id, name)
    }

    // 检查遍历过程中是否发生错误
    if err = rows.Err(); err != nil {
        log.Fatal(err)
    }
}