第一个spring boot 程序

安装、运行、预览省略

错误1：8080端口被IIS占用，关闭它

Description:

The Tomcat connector configured to listen on port 8080 failed to start. The port
may already be in use or the connector may be misconfigured.

Action:

Verify the connector's configuration, identify and stop any process that's liste
ning on port 8080, or configure this application to listen on another port.

http://localhost:8080/d.do

HelloWorld.grovy

@RestController
class HelloWorld {
@RequestMapping("/d.do")
String hello() {
"Hello JournalDev World."
}
}

("/d.do")去掉d.do可以用http://localhost:8080访问；路径不对会报下列错误

Whitelabel Error Page

This application has no explicit mapping for /error, so you are seeing this as a fallback.

Sat Mar 10 15:57:04 CST 2018

There was an unexpected error (type=Not Found, status=404).

No message available