Simple demo of Getting started with Springboot

Project Building

We used MAVEN to build the Springboot project, first creating a MAVEN project with the corresponding POM file as follows:

<properties> <java.version>1.8</java.version> </properties> <!--The parent dependency of the integrated Springboot--<parent> <groupid>org. Springframework.boot</groupid> <artifactId>spring-boot-starter-parent</artifactId> <ver Sion>1.5.7. release</version> </parent> <dependencies> <dependency> <groupid>org .springframework.boot</groupid> <artifactId>spring-boot-starter-web</artifactId> </ Dependency> </dependencies> <!--play executable jar--<build> <plugins> &LT;PL Ugin> <groupId>org.springframework.boot</groupId> <artifactid>spring-bo ot-maven-plugin</artifactid> </plugin> </plugins> </build>

Create Application.java

Package Com.ysl;import Org.springframework.boot.springapplication;import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication Public Class  Application {    publicstaticvoid  main (string[] args) {        Springapplication.run (Application. class , args);}    }

Run the main method and the result is as follows:

  . ____          _            __ _ _ /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \( ( )\___ |'_ | '_| |'_ \/ _` | \ \ \ \\\/  ___)| |_)| | | | | || (_| |  ) ) ) )  '  |____| .__|_| |_|_| |_\__, | / / / /=========|_|==============|___/=/_/_/_/: : Spring Boot:: (v1.5.7. RELEASE)2018-Geneva-Geneva Ten: -:24.028INFO6358---[main] com.ysl.Application:Starting application on master with PID6358(/home/workspace/springboottest/target/classes started by YSLinch/home/workspace/springboottest)2018-Geneva-Geneva Ten: -:24.038INFO6358---[main] com.ysl.Application:No active profileSet, falling back todefaultProfilesdefault2018-Geneva-Geneva Ten: -:24.218INFO6358---[main] ationconfigembeddedwebapplicationcontext:refreshing Org.springframework.boot[email protected]1b372 88:startup Date [Sat MarGeneva Ten: -: -Cst2018]; Root of context Hierarchy2018-Geneva-Geneva Ten: -:27.001INFO6358---[main] s.b.c.e.t.tomcatembeddedservletcontainer:tomcat initialized with Port (s):8080(HTTP)2018-Geneva-Geneva Ten: -:27.025INFO6358---[main] o.apache.catalina.core.standardservice:starting service [Tomcat]2018-Geneva-Geneva Ten: -:27.026INFO6358---[main] org.apache.catalina.core.StandardEngine:Starting Servlet engine:apache tomcat/8.5. -2018-Geneva-Geneva Ten: -:27.141INFO6358---[ost-startstop-1] O.a.c.c.c.[tomcat]. [localhost]. [/]: Initializing Spring embedded Webapplicationcontext2018-Geneva-Geneva Ten: -:27.142INFO6358---[ost-startstop-1] O.s.web.context.contextloader:root Webapplicationcontext:initialization completedinch 2936Ms2018-Geneva-Geneva Ten: -:27.294INFO6358---[ost-startstop-1] o.s.b.w.servlet.servletregistrationbean:mapping servlet:'Dispatcherservlet'to [/]2018-Geneva-Geneva Ten: -:27.299INFO6358---[ost-startstop-1] o.s.b.w.servlet.filterregistrationbean:mapping Filter:'Characterencodingfilter'To: [/*]2018-03-03 10:28:27.300 INFO 6358---[ost-startstop-1] o.s.b.w.servlet.filterregistrationbean:mapping filter: ' Hidd Enhttpmethodfilter ' to: [/*]2018-03-03 10:28:27.300 INFO 6358---[ost-startstop-1] O.s.b.w.servlet.filterregistrationbean:mapping filter: ' Httpputformcontentfilter ' to: [/*]2018-03-03 10:28:27.300 in FO 6358---[ost-startstop-1] o.s.b.w.servlet.filterregistrationbean:mapping filter: ' Requestcontextfilter ' to: [/*]20 18-03-03 10:28:27.669 INFO 6358---[main] s.w.s.m.m.a.requestmappinghandleradapter:looking for @ControllerA Dvice:org.springframework.boot[email protected]1b37288:startup Date [Sat Mar 10:28:24 CST 2018];  Root of context hierarchy2018-03-03 10:28:27.755 INFO 6358---[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) 2018-03-03 10:28:27.756 INFO 6358---[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) 2018-03-03 10:28:27.795 INFO 6358---[main] o.s.w.s.handler.simpleurlhandlermapping:mapped URL path [/WEBJ ars/**] onto handler of type [class org.springframework.web.servlet.resource.resourcehttprequesthandler]2018-03-03 10:28:27.796 INFO 6358---[main] o.s.w.s.handler.simpleurlhandlermapping:mapped URL path [/**] onto handle R of Type [class org.springframework.web.servlet.resource.resourcehttprequesthandler]2018-03-03 10:28:27.835 INFO 6358---[main] o.s.w.s.handler.simpleurlhandlermapping:mapped URL path [/**/Favicon.ico] onto handler of type [classOrg.springframework.web.servlet.resource.ResourceHttpRequestHandler]2018-Geneva-Geneva Ten: -:28.143INFO6358---[main] o.s.j.e.a.annotationmbeanexporter:registering beans forJMX exposure on startup2018-Geneva-Geneva Ten: -:28.252INFO6358---[main] s.b.c.e.t.tomcatembeddedservletcontainer:tomcat started on port (s):8080(HTTP)2018-Geneva-Geneva Ten: -:28.261INFO6358---[main] com.ysl.Application:Started applicationinch 5.148Seconds (JVM running for 5.974)

Spring boot has been started, the embedded tomcat container, the listener as 8080 a port, a springboot program is so simple to be created.

@SpringBootApplication annotations

The source code for springbootapplication annotations is as follows:

@Target ({elementtype.type}) @Retention (retentionpolicy.runtime) @ Documented@inherited@springbootconfiguration@enableautoconfiguration@componentscan (ExcludeFilters={@Filter (type=Filtertype.custom, Classes= {Typeexcludefilter.class}), @Filter (type=Filtertype.custom, Classes= {Autoconfigurationexcludefilter.class})}) Public@interface springbootapplication {@AliasFor (annotation= Enableautoconfiguration.class, Attribute="Exclude") Class<?>[] Exclude ()default {}; @AliasFor (Annotation= Enableautoconfiguration.class, Attribute="Excludename") string[] Excludename ()default {}; @AliasFor (Annotation= Componentscan.class, Attribute="basepackages") string[] scanbasepackages ()default {}; @AliasFor (Annotation= Componentscan.class, Attribute="basepackageclasses") Class<?>[] Scanbasepackageclasses ()default {};}

@Configuration: Indicates Application existence as a sprig configuration file
@EnableAutoConfiguration: Start spring boot built-in automatic configuration
@ComponentScan: Scan the bean, where the path is the Application package sub-path of the class and below, where the package com.ysl spring boot Bean is placed under the path already sub-path.

Building a Rest Project

The above operation even a HelloWorld did not come out, far enough to fill our needs. Under COM.YSL, create a child package controller, under which the Testcontroller.java is created, as follows:

Package Com.ysl.controller;import Org.springframework.web.bind.annotation.mapping;import Org.springframework.web.bind.annotation.requestmapping;import Org.springframework.web.bind.annotation.RestController; @RestControllerpublicclass  TestController {    @RequestMapping ("/")    public  String Home () {        return"hello,springboot";    }}

Restart the program, Access http:localhost:8080, get results: hello,springboot

Simple demo of Getting started with springboot