Golang 使用excelize 导出表格到浏览器下载或者保存到本地。

4773人浏览 2021-10-20

Golang 使用excelize 导出表格到浏览器下载或者保存到本地。

1.安装Excelize.

go get github.com/xuri/excelize/v2

 官方文档:https://xuri.me/excelize/zh-hans/base/installation.html#install

2.封装好的包

package excelizeLib

import (
	"fmt"
	"github.com/gin-gonic/gin"
	"github.com/xuri/excelize/v2"
	"math/rand"
	"net/url"
	"strconv"
	"time"
)

var (
	defaultSheetName = "Sheet1" //默认Sheet名称
	defaultHeight = 25.0 //默认行高度
)

type lkExcelExport struct {
	file *excelize.File
	sheetName string //可定义默认sheet名称
}

func NewMyExcel() *lkExcelExport {
	return &lkExcelExport{file: createFile(),sheetName: defaultSheetName}
}

// ExportToPath 导出基本的表格
func (l *lkExcelExport) ExportToPath(params []map[string]string, data []map[string]interface{}, path string) (string, error) {
	l.export(params, data)
	name := createFileName()
	filePath := path + "/" + name
	err := l.file.SaveAs(filePath)
	return filePath, err
}

// ExportToWeb 导出到浏览器。此处使用的gin框架 其他框架可自行修改ctx
func (l *lkExcelExport) ExportToWeb(params []map[string]string, data []map[string]interface{}, ctx *gin.Context) {
	l.export(params, data)
	buffer, _ := l.file.WriteToBuffer()
	//设置文件类型
	ctx.Header("Content-Type", "application/vnd.ms-excel;charset=utf8")
	//设置文件名称
	ctx.Header("Content-Disposition", "attachment; filename="+url.QueryEscape(createFileName()))
	_, _ = ctx.Writer.Write(buffer.Bytes())
}

//设置首行
func (l *lkExcelExport) writeTop(params []map[string]string)  {
	topStyle, _ := l.file.NewStyle(`{"font":{"bold":true},"alignment":{"horizontal":"center","vertical":"center"}}`)
	var word = 'A'
	//首行写入
	for _, conf := range params {
		title := conf["title"]
		width, _ := strconv.ParseFloat(conf["width"],64)
		line := fmt.Sprintf("%c1",word)
		//设置标题
		_ = l.file.SetCellValue(l.sheetName, line, title)
		//列宽
		_ = l.file.SetColWidth(l.sheetName, fmt.Sprintf("%c",word), fmt.Sprintf("%c",word),width)
		//设置样式
		_ = l.file.SetCellStyle(l.sheetName, line, line, topStyle)
		word++
	}
}

//写入数据
func (l *lkExcelExport) writeData(params []map[string]string, data []map[string]interface{})  {
	lineStyle, _ := l.file.NewStyle(`{"alignment":{"horizontal":"center","vertical":"center"}}`)
	//数据写入
	var j = 2 //数据开始行数
	for i, val := range data {
		//设置行高
		_ = l.file.SetRowHeight(l.sheetName,i+1,defaultHeight)
		//逐列写入
		var word = 'A'
		for _, conf := range params {
			valKey := conf["key"]
			line := fmt.Sprintf("%c%v",word,j)
			isNum := conf["is_num"]

			//设置值
			if isNum != "0" {
				valNum := fmt.Sprintf("'%v",val[valKey])
				_ = l.file.SetCellValue(l.sheetName, line, valNum)
			}else{
				_ = l.file.SetCellValue(l.sheetName, line, val[valKey])
			}

			//设置样式
			_ = l.file.SetCellStyle(l.sheetName, line, line, lineStyle)
			word++
		}
		j++
	}
	//设置行高 尾行
	_ = l.file.SetRowHeight(l.sheetName,len(data)+1,defaultHeight)
}

func (l *lkExcelExport) export(params []map[string]string, data []map[string]interface{})  {
	l.writeTop(params)
	l.writeData(params, data)
}

func createFile() *excelize.File {
	f := excelize.NewFile()
	// 创建一个默认工作表
	sheetName := defaultSheetName
	index := f.NewSheet(sheetName)
	// 设置工作簿的默认工作表
	f.SetActiveSheet(index)
	return f
}

func createFileName() string {
	name := time.Now().Format("2006-01-02-15-04-05")
	rand.Seed(time.Now().UnixNano())
	return fmt.Sprintf("excle-%v-%v.xlsx",name,rand.Int63n(time.Now().Unix()))
}

3.调用实例。

注意:本示例使用的是gin框架。

role.GET("test", func(ctx *gin.Context) {
				//数据索引 避免map无序导致数据导出顺序颠倒
				dataKey := make([]map[string]string,0)
				dataKey = append(dataKey, map[string]string{"key":"title","title":"商品","width":"20","is_num":"0"})
				dataKey = append(dataKey, map[string]string{"key":"price","title":"价格","width":"30","is_num":"0"})
				dataKey = append(dataKey, map[string]string{"key":"num","title":"库存","width":"20","is_num":"1"})

				data := make([]map[string]interface{},0)
				data = append(data, map[string]interface{}{
					"title":"苹果",
					"price":99.99,
					"num":121241231231212,
				})
				data = append(data, map[string]interface{}{
					"title":"橘子",
					"price":69.99,
					"num":80,
				})
				data = append(data, map[string]interface{}{
					"title":"香蕉",
					"price":89.99,
					"num":90,
				})
				excel := excelizeLib.NewMyExcel()
				excel.ExportToWeb(dataKey, data, ctx)

})

4.效果图:

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