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## 需要安装的软件
- wkhtmltoimage
> 用于将HTML转为图片，打印标签需要
```bash
wget https://github.com/wkhtmltopdf/packaging/releases/download/0.12.6-1/wkhtmltox-0.12.6-1.centos7.x86_64.rpm
yum localinstall wkhtmltox-0.12.6-1.centos7.x86_64.rpm
```