SpringBoot不能聽端口

我使用MacOS的Sierra.And我用Springboot-CLI來產生一個空白的項目，並添加一個基本RESTController：SpringBoot不能聽端口

@GetMapping("/") 
public Object index(){ 
    return "hello world"; 
}

我運行project.Everything與似乎很大在控制檯輸出：

. ____   _   __ _ _ 
/\\/___'_ __ _ _(_)_ __ __ _ \ \ \ \ 
(()\___ | '_ | '_| | '_ \/ _` | \ \ \ \ 
\\/ ___)| |_)| | | | | || (_| | )))) 
    ' |____| .__|_| |_|_| |_\__, |//// 
=========|_|==============|___/=/_/_/_/ 
:: Spring Boot ::  (v1.5.3.RELEASE) 

2017-05-23 23:54:19.470 INFO 3776 --- [   main] com.bonc.smallETL.ETLApp     : Starting ETLApp on SLs-Mac.local with PID 3776 (/Users/liuxiaoyang/Desktop/sourceCode/smallETL/smalletl-back/target/classes started by liuxiaoyang in /Users/liuxiaoyang/Desktop/sourceCode/smallETL/smalletl-back) 
2017-05-23 23:54:19.473 INFO 3776 --- [   main] com.bonc.smallETL.ETLApp     : No active profile set, falling back to default profiles: default 
2017-05-23 23:54:19.571 INFO 3776 --- [   main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot[email protected]2805c96b: startup date [Tue May 23 23:54:19 CST 2017]; root of context hierarchy 
2017-05-23 23:54:21.126 INFO 3776 --- [   main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 9999 (http) 
2017-05-23 23:54:21.142 INFO 3776 --- [   main] o.apache.catalina.core.StandardService : Starting service Tomcat 
2017-05-23 23:54:21.143 INFO 3776 --- [   main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.14 
2017-05-23 23:54:21.263 INFO 3776 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/]  : Initializing Spring embedded WebApplicationContext 
2017-05-23 23:54:21.264 INFO 3776 --- [ost-startStop-1] o.s.web.context.ContextLoader   : Root WebApplicationContext: initialization completed in 1699 ms 
2017-05-23 23:54:21.401 INFO 3776 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Mapping servlet: 'dispatcherServlet' to [/] 
2017-05-23 23:54:21.405 INFO 3776 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*] 
2017-05-23 23:54:21.405 INFO 3776 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*] 
2017-05-23 23:54:21.406 INFO 3776 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*] 
2017-05-23 23:54:21.407 INFO 3776 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*]

然而，當我打開瀏覽器並訪問http://localhost:9999（我用一套server.port在application.properties = 9999更改端口9999），事實證明，拒絕連接（也可通過捲曲）。因此，我用命令lsof -i：9999檢查端口也沒有任何問題。

# liuxiaoyang @ SLs-Mac in ~ [0:08:14] 
$ lsof -i:9999 

# liuxiaoyang @ SLs-Mac in ~ [0:14:59] C:1 
$ sudo lsof -i:9999 
Password: 

# liuxiaoyang @ SLs-Mac in ~ [0:15:02] C:1

但是，一切看起來不錯，而jps命令顯示項目JVM已經啓動。我想知道在一切看起來正確的時候，程序不能聽到配置的端口的原因。

來源

2017-05-23 CALTyang

當應用程序啓動時，它會列出它正在監聽的所有端口。該名單是9999？向我們展示啓動輸出。 – csmckelvey

嘗試推出'server.port = 8090' – Reborn

我試過了。我也以爲是端口問題。不過當我改了端口。沒有改變。@ Reborn – CALTyang

看來網絡環境可能會導致這個問題。當我去公司並重新運行這個項目時，它工作正常。驚呆了。我不知道Spring Boot嵌入式Tomcat的細節。但我想這個問題與網絡接口綁定有關，因爲我的電腦中有很多網絡接口（有些是虛擬接口）。

來源

2017-05-24 01:03:27 CALTyang

SpringBoot不能聽端口

回答

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