see:
http://monkeyhacks.com/post/sublime-text-3-copy-as-rtf-and-html-with-sublimehighlight
https://github.com/n1k0/SublimeHighlight

我们需要借助SublimeHighlight插件实现。

如何安装

首先打开包管理器：CTRL+SHIFT+P

输入add

Paste_Image.png

添加下面url：
https://github.com/n1k0/SublimeHighlight/tree/python3

然后再次按下CTRL+SHIFT+P，输入install

Paste_Image.png

查找SublimeHighlight按下回车安装即可。

如何使用

SublimeHighlight: convert to HTML:
will convert current code to highlighted HTML in a new SublimeText tab.

SublimeHighlight: convert to RTF:
will convert current code to highlighted RTF in a new SublimeText tab.

SublimeHighlight: view as HTML:
will convert current code to highlighted HTML and open it in your default browser.

SublimeHighlight: view as RTF:
will convert current code to an RTF document and open the generated file with your default program.

SublimeHighlight: copy to clipboard as HTML:
will convert current code to highlighted HTML and store it into the system clipboard.

SublimeHighlight: copy to clipboard as RTF:
will convert current code to raw highlighted RTF and store it into the system clipboard.