如何通过gopdf将文本数据打印为pdf？

Question

What I tried:

var data string
data = "Line1 <br>
" +
       "Line2 
" +
       "Line3 
" +
       "Line4" // It's got from DB which saved by br data.

pdf.SetFont("wts11", "", 14)
pdf.SetX(100)
pdf.SetY(200)
pdf.Text(data)

Result:

The pdf shows:

And all other printed data disappeared.

Maybe it can't parse <br>.

Even change pdf.Text(data) to pdf.Cell(nil, text), also the same result.

Ref:

https://github.com/signintech/gopdf

Similar issue:

https://github.com/signintech/gopdf/issues/78

Answer 1

Do not skip error handling, that's why you don't see what is the reason of failure.

Please add err check to SetFont, Text, WritePdf functions. In my case I found that error was coming from SetFont since it was not found.

This code works well if you have open-sans.ttf in your working dir:

package main

import (
    "log"

    "github.com/signintech/gopdf"
)

func main() {
    pdf := gopdf.GoPdf{}
    pdf.Start(gopdf.Config{PageSize: *gopdf.PageSizeA4})
    pdf.AddPage()

    if err := pdf.AddTTFFont("open-sans", "open-sans.ttf"); err != nil {
        log.Print(err.Error())
        return
    }

    if err := pdf.SetFont("open-sans", "", 14); err != nil {
        log.Print(err.Error())
        return
    }

    pdf.SetX(100)
    pdf.SetY(200)

    data := "Line1 <br/>
" +
        "Line2 
" +
        "Line3 
" +
        "Line4"

    if err := pdf.Text(data); err != nil {
        log.Print(err.Error())
        return
    }

    if err := pdf.WritePdf("hello.pdf"); err != nil {
        log.Print(err.Error())
        return
    }
}