grails指定端口运行工程

我的环境： 

 | Grails Version: 3.1.4

 | Groovy Version: 2.4.6

 | JVM Version: 1.7.0_80



 根据grails手册，可以通过以下方式指定端口，不过我发现无效哈！

 grails -Dserver.port=8090 run-app


 -------------------------------------------------------------

 解决方法：

 | Enter a command name to run. Use TAB for completion:

 grails> help run-app

 | Command: run-app

 | Description:

 Runs a Grails application



 | Usage:

 grails run-app



 | Flags:

 * debug-jvm - Starts the JVM in debug mode allowing attachment of a remote debugger

 * https - Starts Grails in HTTPS mode on port 8443

 * port - Specifies the port which to start Grails on (defaults to 8080 or 8443 for HTTPS)

 * host - Specifies the host to bind to

 * verbose - Show more output from the build during startup

 grails>



 根据帮助命令help run-app的提示信息可知，port用于指定端口，于是，我试了一下：

 run-app --port=80

 竟然成功了哈。。。