Spring BootCLI-HelloWorldの例
この例では、Spring Boot + MVC + RestベースのWebアプリケーションを作成します。
ステップ1:ソースフォルダーを作成する
FirstApplicationフォルダを作成します E:\Test folder.
ステップ2:ソースファイルを作成する
でFirstApplication.groovyファイルを作成します E:\Test folder 次のソースコードで-
@RestController
class FirstApplication {
@RequestMapping("/")
String welcome() {
"Welcome to TutorialsPoint.Com"
}
}
ステップ3:アプリケーションを実行する
次のコマンドを入力します-
E:/Test/> spring run FirstApplication.groovy
これで、Spring Boot CLIが動作し、必要な依存関係をダウンロードし、組み込みのTomcatを実行し、アプリケーションをデプロイして起動します。コンソールに次の出力が表示されます-
Resolving dependencies..........................................................
................................................................................
........................
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _> | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v1.5.8.RELEASE)
2017-11-07 17:36:55.703 INFO 5528 --- [ runner-0] o.s.boot.SpringApplication:
Starting application on ...
2017-11-07 17:36:55.707 INFO 5528 --- [ runner-0] o.s.boot.SpringApplication:
No active profile set, falling back to default profiles: default
2017-11-07 17:36:56.067 INFO 5528 --- [ runner-0] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@4c108392: startup date [Tue Nov 07 17:36:
56 IST 2017]; root of context hierarchy
2017-11-07 17:36:57.327 INFO 5528 --- [ runner-0] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)
2017-11-07 17:36:57.346 INFO 5528 --- [ runner-0] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2017-11-07 17:36:57.354 INFO 5528 --- [ runner-0] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.23
2017-11-07 17:36:57.537 INFO 5528 --- [ost-startStop-1] org.apache.catalina.loader.WebappLoader : Unknown loader org.springframework.boot.cli.compiler.ExtendedGroovyClassLoader$DefaultScopeParentClassLoader@41bfad4f class org.springframew
ork.boot.cli.compiler.ExtendedGroovyClassLoader$DefaultScopeParentClassLoader
2017-11-07 17:36:57.567 INFO 5528 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2017-11-07 17:36:57.567 INFO 5528 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1500 ms
2017-11-07 17:36:57.725 INFO 5528 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Mapping servlet: 'dispatcherServlet' to [/]
2017-11-07 17:36:57.730 INFO 5528 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*]
2017-11-07 17:36:57.730 INFO 5528 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2017-11-07 17:36:57.730 INFO 5528 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2017-11-07 17:36:57.730 INFO 5528 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*]
2017-11-07 17:36:58.012 INFO 5528 --- [ runner-0] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@4c108392: startup date [Tue Nov 07 17:36:56 IST 2017]; root of context hierarchy
2017-11-07 17:36:58.066 INFO 5528 --- [ runner-0] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/]}" onto public java.lang.String FirstApplication.home()
2017-11-07 17:36:58.070 INFO 5528 --- [ runner-0] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity
> org.springframework.boot.autoconfigure.web.BasicErrorController.error(javax.servlet.http.HttpServletRequest) 2017-11-07 17:36:58.071 INFO 5528 --- [ runner-0] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web .BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse) 2017-11-07 17:36:58.096 INFO 5528 --- [ runner-0] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler] 2017-11-07 17:36:58.096 INFO 5528 --- [ runner-0] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler] 2017-11-07 17:36:58.129 INFO 5528 --- [ runner-0] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler] 2017-11-07 17:36:58.626 INFO 5528 --- [ runner-0] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup 2017-11-07 17:36:58.696 INFO 5528 --- [ runner-0] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080 (http) 2017-11-07 17:36:58.699 INFO 5528 --- [ runner-0] o.s.boot.SpringApplication : Started application in 3.529 seconds (JVM running for 190.196) 2017-11-07 17:37:20.217 INFO 5528 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring FrameworkServlet 'dispatcherServlet' 2017-11-07 17:37:20.218 INFO 5528 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : FrameworkServlet 'dispatcherServlet': initialization started 2017-11-07 17:37:20.238 INFO 5528 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : FrameworkServlet 'dispatcherServlet': initialization completed in 20 ms
ステップ4:ブラウザでアプリケーションを参照する
これで、SpringベースのRESTアプリケーションの準備が整いました。URLを「http://localhost:8080/"と次の出力が表示されます-
Hello World
重要なポイント
Spring CLIがどのように機能するかを理解するには、次の点を考慮してください。
すべての依存関係JARは、初めてダウンロードされるだけです。
Spring CLIは、コードで使用されるクラスとアノテーションに基づいて、ダウンロードする依存関係JARを自動的に検出します。
最後に、コードのコンパイル後、warファイルを組み込みのTomcatにデプロイし、デフォルトのポート8080で組み込みのTomcatサーバーを起動します。