为什么80%的码农都做不了架构师？>>> 
我们先来看一个非常简单的使用Spring boot的例子吧：
1. 我们创建一个Maven工程，假定工程名字为spring-boot，然后我们在pom.xml文件中加入依赖：
| <dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId><version>1.0.2.RELEASE</version>
</dependency>
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2. 新建一个Controller来接受处理我们的请求：
| package com.boonya.demo.controller;import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;@Controller
@EnableAutoConfiguration
public class SimpleController {@RequestMapping(value = "/hello", method = RequestMethod.GET)@ResponseBodypublic String hello() {return "hello world";}public static void main(String[] args) {SpringApplication.run(SimpleController.class, args);}}
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相信大家已经看到了这个Controller有一个main方法，不要急，我们直接运行这个main方法：
| . ____ _ __ _ _/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \\\/ ___)| |_)| | | | | || (_| | ) ) ) )' |____| .__|_| |_|_| |_\__, | / / / /=========|_|==============|___/=/_/_/_/:: Spring Boot :: (v1.0.2.RELEASE)2016-01-12 11:46:41.038 INFO 21860 --- [ main] c.b.demo.controller.SimpleController : Starting SimpleController on RD-PJL-1372-01 with PID 21860 (C:\DEVELOPER_WORKSPACE\DEVELOPERS\ECLIPSE\eclipse_luna_SR2\workspace\SpringBootDemo\target\classes started by pengjunlin in C:\DEVELOPER_WORKSPACE\DEVELOPERS\ECLIPSE\eclipse_luna_SR2\workspace\SpringBootDemo)
2016-01-12 11:46:41.067 INFO 21860 --- [ main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@4d5698f: startup date [Tue Jan 12 11:46:41 CST 2016]; root of context hierarchy
2016-01-12 11:46:41.819 INFO 21860 --- [ main] .t.TomcatEmbeddedServletContainerFactory : Server initialized with port: 8080
2016-01-12 11:46:41.988 INFO 21860 --- [ main] o.apache.catalina.core.StandardService : Starting service Tomcat
2016-01-12 11:46:41.988 INFO 21860 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/7.0.52
2016-01-12 11:46:42.063 INFO 21860 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2016-01-12 11:46:42.063 INFO 21860 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 998 ms
2016-01-12 11:46:42.402 INFO 21860 --- [ost-startStop-1] o.s.b.c.e.ServletRegistrationBean : Mapping servlet: 'dispatcherServlet' to [/]
2016-01-12 11:46:42.403 INFO 21860 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2016-01-12 11:46:42.555 INFO 21860 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2016-01-12 11:46:42.611 INFO 21860 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/hello],methods=[GET],params=[],headers=[],consumes=[],produces=[],custom=[]}" onto public java.lang.String com.boonya.demo.controller.SimpleController.hello()
2016-01-12 11:46:42.625 INFO 21860 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2016-01-12 11:46:42.626 INFO 21860 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2016-01-12 11:46:42.732 INFO 21860 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2016-01-12 11:46:42.752 INFO 21860 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080/http
2016-01-12 11:46:42.753 INFO 21860 --- [ main] c.b.demo.controller.SimpleController : Started SimpleController in 1.996 seconds (JVM running for 2.233)
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会产生上面的输出，查看日志可以发现默认使用的是tomcat，端口绑定在8080，现在让我们来访问：http://localhost:8080/hello
就可以看到我们代码中输出的字样：hello world了。回首这个过程，是不是相比于以前快速了许多呢。
