在前端显示PDF文件，针对PDFObject库不支持的浏览器可以使用Canvas绘制PDF文件内容
Contributions last year: 2
Max continuous contributions: 1
Recent contributions: 1
Commits, issues, and pull requests will appear on your contribution graph. Only when the email address used for the commits in local configuration is associated with your GitOSC account, the commits' contribution will be counted.