你可以安装 plantuml-mode
然后设置
(add-to-list 'auto-mode-alist '("\\.puml\\'" . plantuml-mode))
(add-to-list 'auto-mode-alist '("\\.plantuml\\'" . plantuml-mode))
(setq plantuml-jar-path "～/.custom/plantuml.jar")
(add-to-list 'org-src-lang-modes '("plantuml" . plantuml))
(setq org-plantuml-jar-path
(expand-file-name "~/.custom/plantuml.jar"))
顺便感谢一下，很久没用plantuml-mode了，之前它是puml-mode，现在已经废弃了