> For the complete documentation index, see [llms.txt](https://doc.shiker.tech/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.shiker.tech/spring-he-xin-gong-neng/4.-spel-biao-da-shi.md).

# 4. SpEL表达式