go語言將表資料動態轉成切片(欄位任意拓展)

package main

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

//先把欄位的值都當成字串
func Rows2SliceMap(rows *sql.Rows) (list []map[string]string) {
//欄位名稱
columns, _ := rows.Columns()
//多少個欄位
length := len(columns)
//每一行欄位的值
values := make([]sql.RawBytes, length)
//儲存的是values的記憶體地址
pointer := make([]interface{}, length)
//
for i := 0; i < length; i++ {
pointer[i] = &values[i]
}
//
for rows.Next() {
//把引數展開，把每一行的值存到指定的記憶體地址去，迴圈覆蓋，values也就跟著被賦值了
rows.Scan(pointer...)
//每一行
row := make(map[string]string)
for i := 0; i < length; i++ {
row[columns[i]] = string(values[i])
}
list = append(list, row)
}
//
return
}

func main() {
db, err := sql.Open("mysql", "root:1234@tcp(192.168.99.165:3306)/test?charset=utf8")
if err != nil {
log.Println(err.Error())
}
err = db.Ping()
if err != nil {
log.Println(err.Error())
}
rows, _ := db.Query("select * from cms")
defer rows.Close()
list := Rows2SliceMap(rows)
for k, v := range list {
fmt.Println(k)
fmt.Println(v["id"], v["name"], v["sex"], v["age"])
}
}