最近收到网友的提问后端怎么把html转成pdf文件，于是我就把我以前做的例子发出来给大家参考一下，如果对你有帮助的话请点个赞

1.首先选择适合自己的系统下载wkhtmltopdf工具

mac下载后安装成功会自动添加到环境变量 直接执行 wkhtmltopdf -V 测试是否安装成功

hfy@566-Mac-mini ~ % wkhtmltopdf -V

wkhtmltopdf 0.12.5 (with patched qt)

linux环境安装需要下载好，添加执行权限并手动加到环境变量下面,如果不想加入到环境变量在代码里写死路径也行

2.直接使用下面demo修改下就可以使用了

package main

import (

"context"

"errors"

"fmt"

"io/ioutil"

"os/exec"

"path/filepath"

)

var (

argsError = errors.New("no input file or out path")

fileTypeError = errors.New("the file must be in pdf format")

)

type HtmlToPdf struct {

Commond string

in string

out string

argsMap map[string]string

prams []string

}

func NewPdf() *HtmlToPdf {

args := map[string]string{

"--load-error-handling": "ignore",

"--footer-center": "第[page]页/共[topage]页",

"--footer-font-size": "8",

"-B": "31",

"-T": "32",

}

return &HtmlToPdf{

Commond: "wkhtmltopdf",

argsMap: args,

}

}

func (this *HtmlToPdf) OutFile(input string, outPath string) (string, error) {

var pdfPath string

// 输入 输出 参数不能为空

if input == "" || outPath == "" {

return pdfPath, argsError

}

//判断是否是生成pdf 文件

ext := filepath.Ext(outPath)

if ext != ".pdf" {

return pdfPath, fileTypeError

}

this.in = input

this.out = outPath

//构建参数

this.buildPrams()

//执行命令

if _, err := this.doExce();err != nil {

return pdfPath, err

}

return pdfPath, nil

}

func (this *HtmlToPdf) doExce() ([]byte, error) {

ctx, cancel := context.WithCancel(context.Background())

defer cancel()

cmd := exec.CommandContext(ctx, this.Commond, this.prams...)

stdout, err := cmd.StderrPipe()

if err != nil {

return nil, err

}

defer stdout.Close()

//运行命令

err = cmd.Start()

if err != nil {

return nil, err

}

bytes, err := ioutil.ReadAll(stdout)

if err != nil {

return nil, err

}

cmd.Wait()

return bytes, err

}

func (this *HtmlToPdf) buildPrams() {

for key, val := range this.argsMap {

this.prams = append(this.prams, key, val)

}

//添加 输入 输出 参数

this.prams = append(this.prams, this.in, this.out)

}

func main() {

pdfOpt:= NewPdf()

htmlDemoPath := "xxxxx/src/demo/test.html"

PdfDemoPath := "xxxxx/src/demo/test.pdf"

str,err := pdfOpt.OutFile(htmlDemoPath,PdfDemoPath)

if err != nil {

fmt.Println("Error ",err)

return

}

fmt.Println(str)

}

效果:

image.png