1 pdf2html  docker 启动，java 调用服务即可转化

https://beltxman.com/2567.html 

docker run -ti --rm -v ~/pdf:/pdf -w /pdf docker.io/pdf2htmlex/pdf2htmlex:0.18.8.rc2-master-20200820-ubuntu-20.04-x86_64  test.pdf

2 html2pdf java .Runtime 类型调用命令行执行

https://wkhtmltopdf.org/downloads.html 这

wkhtmltopdf