go连接mysql

go连接mysql

package main

import (
    "database/sql"
    "fmt"
    _ "github.com/go-sql-driver/mysql"
)

func main() {
    db, err := sql.Open("mysql", "root:***@tcp(127.0.0.1:3200)/server_conf?charset=utf8")
    if err != nil {
        fmt.Printf("connect mysql failed! [%s]", err)
        return
    } else {
        fmt.Println("connect mysql ok!")
    }

    rows, err := db.Query("SELECT d_id, d_dname FROM domain")
    if err != nil {
        fmt.Printf("select failed! [%s]", err)
        return
    }

    var mapDomain map[string]int
    mapDomain = make(map[string]int)
    for rows.Next() {
        var d_id int
        var d_dname string

        rows.Columns()
        err = rows.Scan(&d_id, &d_dname)
        if err != nil {
            fmt.Printf("Get domain info failed! [%s]", err)
        }

        mapDomain[d_dname] = d_id
    }

    // 遍历所有的KEY
    for k, v := range mapDomain {
        fmt.Println(k, v)
    }

    // 查找指定KEY
    if v, ok := mapDomain["www.test2.com"]; ok {
        fmt.Println(v)
    } else {
        fmt.Println("Key Not Found")
    }
}

输出:
connect mysql ok!