Spring-boot学习（一）：IntelliJ IDEA 搭建Spring-boot 框架HelloWorld

   由于工作中最近使用spring boot 框架，同时个人也想逐渐写一些热插拔式得demo模块，所有萌生了写博客的念头，以下是使用IEDA+Spring boot + MAVEN搭建得一个helloworld程序。开始之前请先安装IntelliJ IDEA 。

源码github地址：git@github.com:FunCodeH/spring-boot-study.git

一、社区版教程

       由于社区版无法创建web工程，所有需要在spring官网创建demo，然后下载到本地，通过IDEA打开。链接如下： https://start.spring.io/，打开上述链接，可以看到如下图所示模版，填写之后点击generate project生成项目：



二、付费版IDEA可以创建web工程，步骤如下：

 打开IDEA，选择新建工程：

 


选择选择Spring Initializr 选择你本地得java版本，URL选择默认，点击next

 


填写包名称，工程名称，根据个人需要选择打包方式，可以为war包或者jar包

 


选择需要添加得依赖，这里选择web，方便后续创建简单得web工程

 


点击next直到finish完成工程创建，以下为spring-boot工程结构：

 


从上图看到IDEA已经自动创建了工程结构，主要包含了main和test目录，其中main目录是编写我们得应用程序代码，而test目录是用于编写测试代码。此时右键启动SpringBootHelloWorldDemoApplication即可运行此工程，以下为启动过程：

"D:\Program Files\Java\jdk1.8.0_121\bin\java" -XX:TieredStopAtLevel=1 -noverify -Dspring.output.ansi.enabled=always -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=57247 -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -Djava.rmi.server.hostname=localhost -Dspring.liveBeansView.mbeanDomain -Dspring.application.admin.enabled=true "-javaagent:D:\Program Files\JetBrains\IntelliJ IDEA 2017.3.2\lib\idea_rt.jar=57248:D:\Program Files\JetBrains\IntelliJ IDEA 2017.3.2\bin" -Dfile.encoding=UTF-8 -classpath "D:\Program Files\Java\jdk1.8.0_121\jre\lib\charsets.jar;D:\Program Files\Java\jdk1.8.0_121\jre\lib\deploy.jar;D:\Program Files\Java\jdk1.8.0_121\jre\lib\ext\access-bridge-64.jar;D:\Program Files\Java\jdk1.8.0_121\jre\lib\ext\cldrdata.jar;D:\Program Files\Java\jdk1.8.0_121\jre\lib\ext\dnsns.jar;D:\Program Files\Java\jdk1.8.0_121\jre\lib\ext\jaccess.jar;D:\Program Files\Java\jdk1.8.0_121\jre\lib\ext\jfxrt.jar;D:\Program Files\Java\jdk1.8.0_121\jre\lib\ext\localedata.jar;D:\Program Files\Java\jdk1.8.0_121\jre\lib\ext\nashorn.jar;D:\Program Files\Java\jdk1.8.0_121\jre\lib\ext\sunec.jar;D:\Program Files\Java\jdk1.8.0_121\jre\lib\ext\sunjce_provider.jar;D:\Program Files\Java\jdk1.8.0_121\jre\lib\ext\sunmscapi.jar;D:\Program Files\Java\jdk1.8.0_121\jre\lib\ext\sunpkcs11.jar;D:\Program Files\Java\jdk1.8.0_121\jre\lib\ext\zipfs.jar;D:\Program Files\Java\jdk1.8.0_121\jre\lib\javaws.jar;D:\Program Files\Java\jdk1.8.0_121\jre\lib\jce.jar;D:\Program Files\Java\jdk1.8.0_121\jre\lib\jfr.jar;D:\Program Files\Java\jdk1.8.0_121\jre\lib\jfxswt.jar;D:\Program Files\Java\jdk1.8.0_121\jre\lib\jsse.jar;D:\Program Files\Java\jdk1.8.0_121\jre\lib\management-agent.jar;D:\Program Files\Java\jdk1.8.0_121\jre\lib\plugin.jar;D:\Program Files\Java\jdk1.8.0_121\jre\lib\resources.jar;D:\Program Files\Java\jdk1.8.0_121\jre\lib\rt.jar;D:\java\project\IDEA\spring-boot-helloworld-demo\target\classes;C:\Users\Administrator\.m2\repository\org\springframework\boot\spring-boot-starter-web\1.5.9.RELEASE\spring-boot-starter-web-1.5.9.RELEASE.jar;C:\Users\Administrator\.m2\repository\org\springframework\boot\spring-boot-starter\1.5.9.RELEASE\spring-boot-starter-1.5.9.RELEASE.jar;C:\Users\Administrator\.m2\repository\org\springframework\boot\spring-boot\1.5.9.RELEASE\spring-boot-1.5.9.RELEASE.jar;C:\Users\Administrator\.m2\repository\org\springframework\boot\spring-boot-autoconfigure\1.5.9.RELEASE\spring-boot-autoconfigure-1.5.9.RELEASE.jar;C:\Users\Administrator\.m2\repository\org\springframework\boot\spring-boot-starter-logging\1.5.9.RELEASE\spring-boot-starter-logging-1.5.9.RELEASE.jar;C:\Users\Administrator\.m2\repository\ch\qos\logback\logback-classic\1.1.11\logback-classic-1.1.11.jar;C:\Users\Administrator\.m2\repository\ch\qos\logback\logback-core\1.1.11\logback-core-1.1.11.jar;C:\Users\Administrator\.m2\repository\org\slf4j\jcl-over-slf4j\1.7.25\jcl-over-slf4j-1.7.25.jar;C:\Users\Administrator\.m2\repository\org\slf4j\jul-to-slf4j\1.7.25\jul-to-slf4j-1.7.25.jar;C:\Users\Administrator\.m2\repository\org\slf4j\log4j-over-slf4j\1.7.25\log4j-over-slf4j-1.7.25.jar;C:\Users\Administrator\.m2\repository\org\yaml\snakeyaml\1.17\snakeyaml-1.17.jar;C:\Users\Administrator\.m2\repository\org\springframework\boot\spring-boot-starter-tomcat\1.5.9.RELEASE\spring-boot-starter-tomcat-1.5.9.RELEASE.jar;C:\Users\Administrator\.m2\repository\org\apache\tomcat\embed\tomcat-embed-core\8.5.23\tomcat-embed-core-8.5.23.jar;C:\Users\Administrator\.m2\repository\org\apache\tomcat\tomcat-annotations-api\8.5.23\tomcat-annotations-api-8.5.23.jar;C:\Users\Administrator\.m2\repository\org\apache\tomcat\embed\tomcat-embed-el\8.5.23\tomcat-embed-el-8.5.23.jar;C:\Users\Administrator\.m2\repository\org\apache\tomcat\embed\tomcat-embed-websocket\8.5.23\tomcat-embed-websocket-8.5.23.jar;C:\Users\Administrator\.m2\repository\org\hibernate\hibernate-validator\5.3.6.Final\hibernate-validator-5.3.6.Final.jar;C:\Users\Administrator\.m2\repository\javax\validation\validation-api\1.1.0.Final\validation-api-1.1.0.Final.jar;C:\Users\Administrator\.m2\repository\org\jboss\logging\jboss-logging\3.3.1.Final\jboss-logging-3.3.1.Final.jar;C:\Users\Administrator\.m2\repository\com\fasterxml\classmate\1.3.4\classmate-1.3.4.jar;C:\Users\Administrator\.m2\repository\com\fasterxml\jackson\core\jackson-databind\2.8.10\jackson-databind-2.8.10.jar;C:\Users\Administrator\.m2\repository\com\fasterxml\jackson\core\jackson-annotations\2.8.0\jackson-annotations-2.8.0.jar;C:\Users\Administrator\.m2\repository\com\fasterxml\jackson\core\jackson-core\2.8.10\jackson-core-2.8.10.jar;C:\Users\Administrator\.m2\repository\org\springframework\spring-web\4.3.13.RELEASE\spring-web-4.3.13.RELEASE.jar;C:\Users\Administrator\.m2\repository\org\springframework\spring-aop\4.3.13.RELEASE\spring-aop-4.3.13.RELEASE.jar;C:\Users\Administrator\.m2\repository\org\springframework\spring-beans\4.3.13.RELEASE\spring-beans-4.3.13.RELEASE.jar;C:\Users\Administrator\.m2\repository\org\springframework\spring-context\4.3.13.RELEASE\spring-context-4.3.13.RELEASE.jar;C:\Users\Administrator\.m2\repository\org\springframework\spring-webmvc\4.3.13.RELEASE\spring-webmvc-4.3.13.RELEASE.jar;C:\Users\Administrator\.m2\repository\org\springframework\spring-expression\4.3.13.RELEASE\spring-expression-4.3.13.RELEASE.jar;C:\Users\Administrator\.m2\repository\org\slf4j\slf4j-api\1.7.25\slf4j-api-1.7.25.jar;C:\Users\Administrator\.m2\repository\org\springframework\spring-core\4.3.13.RELEASE\spring-core-4.3.13.RELEASE.jar" com.funcodeh.springboothelloworlddemo.SpringBootHelloworldDemoApplication

.   ____          _            __ _ _
/\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/  ___)| |_)| | | | | || (_| |  ) ) ) )
'  |____| .__|_| |_|_| |_\__, | / / / /
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:: Spring Boot ::        (v1.5.9.RELEASE)

2018-01-09 22:38:35.232  INFO 10988 --- [           main] .f.s.SpringBootHelloworldDemoApplication : Starting SpringBootHelloworldDemoApplication on admin-PC with PID 10988 (D:\java\project\IDEA\spring-boot-helloworld-demo\target\classes started by Administrator in D:\java\project\IDEA\spring-boot-helloworld-demo)
2018-01-09 22:38:35.234  INFO 10988 --- [           main] .f.s.SpringBo
a105
otHelloworldDemoApplication : No active profile set, falling back to default profiles: default
2018-01-09 22:38:35.261  INFO 10988 --- [           main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@641147d0: startup date [Tue Jan 09 22:38:35 CST 2018]; root of context hierarchy
2018-01-09 22:38:35.966  INFO 10988 --- [           main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)
2018-01-09 22:38:35.971  INFO 10988 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2018-01-09 22:38:35.972  INFO 10988 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet Engine: Apache Tomcat/8.5.23
2018-01-09 22:38:36.026  INFO 10988 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2018-01-09 22:38:36.026  INFO 10988 --- [ost-startStop-1] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 767 ms
2018-01-09 22:38:36.110  INFO 10988 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean  : Mapping servlet: 'dispatcherServlet' to [/]
2018-01-09 22:38:36.112  INFO 10988 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'characterEncodingFilter' to: [/*]
2018-01-09 22:38:36.113  INFO 10988 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2018-01-09 22:38:36.113  INFO 10988 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2018-01-09 22:38:36.113  INFO 10988 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'requestContextFilter' to: [/*]
2018-01-09 22:38:36.317  INFO 10988 --- [           main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@641147d0: startup date [Tue Jan 09 22:38:35 CST 2018]; root of context hierarchy
2018-01-09 22:38:36.352  INFO 10988 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.BasicErrorController.error(javax.servlet.http.HttpServletRequest)
2018-01-09 22:38:36.353  INFO 10988 --- [           main] 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)
2018-01-09 22:38:36.371  INFO 10988 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-01-09 22:38:36.371  INFO 10988 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-01-09 22:38:36.393  INFO 10988 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-01-09 22:38:36.467  INFO 10988 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Registering beans for JMX exposure on startup
2018-01-09 22:38:36.498  INFO 10988 --- [           main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080 (http)
2018-01-09 22:38:36.500  INFO 10988 --- [           main] .f.s.SpringBootHelloworldDemoApplication : Started SpringBootHelloworldDemoApplication in 1.416 seconds (JVM running for 3.276)

     可以看到Tomcat服务器在8080端口启动，启动时间为1.416s。