> For the complete documentation index, see [llms.txt](https://jack80342.gitbook.io/spring-boot/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://jack80342.gitbook.io/spring-boot/ix.-how-to-guides/75.-embedded-web-servers/75.5-use-a-random-unassigned-http-port.md).

# 75.5 使用随机未分配的HTTP端口

想扫描获取一个未使用的端口（使用操作系统本地端口以防冲突）可以设置`server.port=0`。