GO将mysql表的数据导出到excel

package main

import (
    "log"
    "strconv"

    _ "github.com/go-sql-driver/mysql"
    "github.com/jinzhu/gorm"
    "github.com/pikanezi/mapslice"
    "github.com/tealeg/xlsx"
)

type Role struct {
    Id     int    `gorm:"primary_key"` //主键id
    Name   string `gorm:"not null"`   //角色名
    Remark string
    Status int
}

type RoleBack struct {
    Id     string `json:"id"`
    Name   string `json:"name"`
    Remark string `json:"remark"`
    Status string `json:"status"`
}

//规定表名
func (Role) TableName() string {
    return "role"
}

var DB *gorm.DB

//初始化并保持连接
func init() {
    var err error
    DB, err = gorm.Open("mysql", "root:123456@/test?charset=utf8&parseTime=True&loc=Local")
    //    DB.LogMode(true)//打印sql语句
    if err != nil {
        log.Fatalf("database connect is err:%s", err.Error())
    } else {
        log.Print("connect database is success")
    }
    err = DB.DB().Ping()
    if err != nil {
        DB.DB().Close()
        log.Fatalf("Error on opening database connection: %s", err.Error())
    }
}

func main() {
    var role RoleBack
    var rolelists []RoleBack
    rolelist, _ := GetRoleList()
    for i := 0; i < len(rolelist); i++ {
        role.Id = strconv.Itoa(rolelist[i].Id)
        role.Name = rolelist[i].Name
        role.Remark = rolelist[i].Remark
        role.Status = strconv.Itoa(rolelist[i].Status)
        rolelists = append(rolelists, role)
    }
    id, _ := mapslice.ToStrings(rolelists, "Id")
    name, _ := mapslice.ToStrings(rolelists, "Name")
    remark, _ := mapslice.ToStrings(rolelists, "Remark")
    status, _ := mapslice.ToStrings(rolelists, "Status")

    var file *xlsx.File
    var sheet *xlsx.Sheet
    var row *xlsx.Row
    var cell *xlsx.Cell
    file = xlsx.NewFile()
    sheet, _ = file.AddSheet("Sheet1")
    row = sheet.AddRow()
    cell = row.AddCell()
    cell.Value = "编号"
    cell = row.AddCell()
    cell.Value = "名称"
    cell = row.AddCell()
    cell.Value = "状态"
    cell = row.AddCell()
    cell.Value = "备注"
    for i := 0; i < len(id); i++ {
        row = sheet.AddRow()
        cell = row.AddCell()
        cell.Value = id[i]
        cell = row.AddCell()
        cell.Value = name[i]
        cell = row.AddCell()
        cell.Value = status[i]
        cell = row.AddCell()
        cell.Value = remark[i]
        file.Save("MyXLSXFile.xlsx")
    }
}

func GetRoleList() (rolelist []Role, err error) {
    err = DB.Find(&rolelist).Error
    return rolelist, err
}