golang mysql 简单封装与使用

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

    dbtemp, err := sql.Open("mysql", "root:password@/dbname?charset=utf8")
    db = dbtemp
    if err != nil {
        fmt.Println(err)
    }
    stmt, err := db.Prepare("create table if not exists dev(id int UNSIGNED AUTO_INCREMENT NOT NULL PRIMARY KEY,uid varchar(64),did varchar(64),name varchar(64),qid varchar(64),status char DEFAULT 'u')")
    if stmt != nil {
        stmt.Exec()
        stmt.Close()
    }
    stmt, err := db.Prepare("alter table dev convert to character set utf8 collate utf8_general_ci")  //要修改一下编码
    if stmt != nil {
        stmt.Exec()
        stmt.Close()
    }
    
    _ = err
  

func GetOne(rows *sql.Rows) []string {
    if rows == nil {
        return nil
    }
    
    cols, err := rows.Columns()
    
    rawResult := make([][]byte, len(cols))
    result := make([]string, len(cols))
    dest := make([]interface{}, len(cols))
    for i, _ := range rawResult {
        dest[i] = &rawResult[i]
    }
    
    if rows.Next() {
        err = rows.Scan(dest...)
        
        for i, raw := range rawResult {
            if raw == nil {
                result[i] = ""
            } else {
                result[i] = string(raw)
            }
        }
        
        //fmt.Printf("%#v\n", result)
        
        //break
    } else {
        return nil
    }
    
    _=err
    return result
}

stmt, err := db.Prepare("select did,name from dev where (uid=? and name=?)")
printErr(err)
rows, err := stmt.Query(r.FromUserName, name)
printErr(err)
re := GetOne(rows)
stmt.Close()

stmt, err := db.Prepare("insert into dev(uid,did,name,qid) values(?,?,?,?)")
stmt.Exec(r.FromUserName,r.DeviceID,con,r.ToUserName)
stmt.Close()