go 合并excel

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帮同学写的一个程序，合并一个文件夹下的所有excel文件，并跳过前5行。用go语言编写。

package main

import (
    "fmt"
    "io/ioutil"
    "os"
    "github.com/tealeg/xlsx"
)

//获取指定目录下的所有文件和目录
func main(){

    //设置路径，文件夹放在main的同级目录下
    PthSep := string(os.PathSeparator)
    Pthdir := "./excel"

    dir, err := ioutil.ReadDir(Pthdir)
    if err != nil {
        fmt.Printf("open dir failed: %s\n", err.Error())
    }

    //申明合并后的文件
    var new_file *xlsx.File
    var new_sheet *xlsx.Sheet
    new_file = xlsx.NewFile()
    var new_err error
    new_sheet, new_err = new_file.AddSheet("Sheet1")

    for _, fi := range dir {
        
        fmt.Printf("open success: %s\n", Pthdir + PthSep+fi.Name())
        if new_err != nil {
            fmt.Printf(new_err.Error())
        }

        //读取文件
        xlFile, err := xlsx.OpenFile(Pthdir + PthSep + fi.Name())
        if err != nil {
            fmt.Printf("open failed: %s\n", err)
        }
        for _, sheet := range xlFile.Sheets {
            fmt.Printf("Sheet Name: %s\n", sheet.Name)

            num := 0
            for _, row := range sheet.Rows {
                num++
                //跳过前5行，将后面的行写入新的文件
                if(num > 5){
                    new_row := new_sheet.AddRow()
                    new_row.SetHeightCM(1)

                    for _, cell := range row.Cells {
                        text := cell.String()
                        fmt.Printf("%s\n", text)

                        new_cell := new_row.AddCell()
                        new_cell.Value = text
                    }
                }
            }
        }
    }

    //写入文件
    new_err = new_file.Save("merge.xlsx")
    if new_err != nil {
        fmt.Printf(new_err.Error())
    }
}