新建manv工程：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>spring-boot</groupId><artifactId>com.liwen</artifactId><version>1.0-SNAPSHOT</version><!--
spring boot 父节点依赖,引入这个之后相关的引入就不需要添加version配置，spring boot会自动选择最合适的版本进行添加。--><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>1.4.3.RELEASE</version></parent><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><!-- 指定一下jdk的版本 ，这里我们使用jdk 1.8 ,默认是1.6 --><java.version>1.8</java.version></properties><dependencies><!--spring-boot-starter-web: MVC,AOP的依赖包....--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId><!--<version></version>由于我们在上面指定了 parent(spring boot)--></dependency><!-- 添加fastjson 依赖包. --><dependency><groupId>com.alibaba</groupId><artifactId>fastjson</artifactId><version>1.2.15</version></dependency><!-- spring boot devtools 依赖包. --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-devtools</artifactId><optional>true</optional><scope>true</scope></dependency></dependencies></project>

新建class文件

package com.liwen;import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;@RestController
public class HellCotroller {@RequestMapping("/hello")public  String Hello(){return "liwen good!";}
}

运行

package com.liwen;import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;@SpringBootApplication
public class Appmin {public static void main(String[] args) {SpringApplication.run(Appmin.class,args);}
}

结果

"D:\Program Files\Java\jdk1.8.0_31\bin\java" -XX:TieredStopAtLevel=1 -noverify -Dspring.output.ansi.enabled=always -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=35212 -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 2018.1\lib\idea_rt.jar=35213:D:\Program Files\JetBrains\IntelliJ IDEA 2018.1\bin" -Dfile.encoding=UTF-8 -classpath "D:\Program Files\Java\jdk1.8.0_31\jre\lib\charsets.jar;D:\Program Files\Java\jdk1.8.0_31\jre\lib\deploy.jar;D:\Program Files\Java\jdk1.8.0_31\jre\lib\ext\access-bridge-64.jar;D:\Program Files\Java\jdk1.8.0_31\jre\lib\ext\c3p0-0.9.1.2.jar;D:\Program Files\Java\jdk1.8.0_31\jre\lib\ext\cldrdata.jar;D:\Program Files\Java\jdk1.8.0_31\jre\lib\ext\commons-collections.jar;D:\Program Files\Java\jdk1.8.0_31\jre\lib\ext\commons-dbcp-1.3.jar;D:\Program Files\Java\jdk1.8.0_31\jre\lib\ext\commons-pool.jar;D:\Program Files\Java\jdk1.8.0_31\jre\lib\ext\dnsns.jar;D:\Program Files\Java\jdk1.8.0_31\jre\lib\ext\jaccess.jar;D:\Program Files\Java\jdk1.8.0_31\jre\lib\ext\jfxrt.jar;D:\Program Files\Java\jdk1.8.0_31\jre\lib\ext\localedata.jar;D:\Program Files\Java\jdk1.8.0_31\jre\lib\ext\mysql-connector-java-5.1.7-bin.jar;D:\Program Files\Java\jdk1.8.0_31\jre\lib\ext\nashorn.jar;D:\Program Files\Java\jdk1.8.0_31\jre\lib\ext\sunec.jar;D:\Program Files\Java\jdk1.8.0_31\jre\lib\ext\sunjce_provider.jar;D:\Program Files\Java\jdk1.8.0_31\jre\lib\ext\sunmscapi.jar;D:\Program Files\Java\jdk1.8.0_31\jre\lib\ext\sunpkcs11.jar;D:\Program Files\Java\jdk1.8.0_31\jre\lib\ext\zipfs.jar;D:\Program Files\Java\jdk1.8.0_31\jre\lib\javaws.jar;D:\Program Files\Java\jdk1.8.0_31\jre\lib\jce.jar;D:\Program Files\Java\jdk1.8.0_31\jre\lib\jfr.jar;D:\Program Files\Java\jdk1.8.0_31\jre\lib\jfxswt.jar;D:\Program Files\Java\jdk1.8.0_31\jre\lib\jsse.jar;D:\Program Files\Java\jdk1.8.0_31\jre\lib\management-agent.jar;D:\Program Files\Java\jdk1.8.0_31\jre\lib\plugin.jar;D:\Program Files\Java\jdk1.8.0_31\jre\lib\resources.jar;D:\Program Files\Java\jdk1.8.0_31\jre\lib\rt.jar;D:\TOOL\IDEASpace\comliwen\target\classes;C:\Users\lw.m2\repository\org\springframework\boot\spring-boot-starter-web\1.4.3.RELEASE\spring-boot-starter-web-1.4.3.RELEASE.jar;C:\Users\lw.m2\repository\org\springframework\boot\spring-boot-starter\1.4.3.RELEASE\spring-boot-starter-1.4.3.RELEASE.jar;C:\Users\lw.m2\repository\org\springframework\boot\spring-boot-starter-logging\1.4.3.RELEASE\spring-boot-starter-logging-1.4.3.RELEASE.jar;C:\Users\lw.m2\repository\ch\qos\logback\logback-classic\1.1.8\logback-classic-1.1.8.jar;C:\Users\lw.m2\repository\ch\qos\logback\logback-core\1.1.8\logback-core-1.1.8.jar;C:\Users\lw.m2\repository\org\slf4j\slf4j-api\1.7.22\slf4j-api-1.7.22.jar;C:\Users\lw.m2\repository\org\slf4j\jcl-over-slf4j\1.7.22\jcl-over-slf4j-1.7.22.jar;C:\Users\lw.m2\repository\org\slf4j\jul-to-slf4j\1.7.22\jul-to-slf4j-1.7.22.jar;C:\Users\lw.m2\repository\org\slf4j\log4j-over-slf4j\1.7.22\log4j-over-slf4j-1.7.22.jar;C:\Users\lw.m2\repository\org\springframework\spring-core\4.3.5.RELEASE\spring-core-4.3.5.RELEASE.jar;C:\Users\lw.m2\repository\org\yaml\snakeyaml\1.17\snakeyaml-1.17.jar;C:\Users\lw.m2\repository\org\springframework\boot\spring-boot-starter-tomcat\1.4.3.RELEASE\spring-boot-starter-tomcat-1.4.3.RELEASE.jar;C:\Users\lw.m2\repository\org\apache\tomcat\embed\tomcat-embed-core\8.5.6\tomcat-embed-core-8.5.6.jar;C:\Users\lw.m2\repository\org\apache\tomcat\embed\tomcat-embed-el\8.5.6\tomcat-embed-el-8.5.6.jar;C:\Users\lw.m2\repository\org\apache\tomcat\embed\tomcat-embed-websocket\8.5.6\tomcat-embed-websocket-8.5.6.jar;C:\Users\lw.m2\repository\org\hibernate\hibernate-validator\5.2.4.Final\hibernate-validator-5.2.4.Final.jar;C:\Users\lw.m2\repository\javax\validation\validation-api\1.1.0.Final\validation-api-1.1.0.Final.jar;C:\Users\lw.m2\repository\org\jboss\logging\jboss-logging\3.3.0.Final\jboss-logging-3.3.0.Final.jar;C:\Users\lw.m2\repository\com\fasterxml\classmate\1.3.3\classmate-1.3.3.jar;C:\Users\lw.m2\repository\com\fasterxml\jackson\core\jackson-databind\2.8.5\jackson-databind-2.8.5.jar;C:\Users\lw.m2\repository\com\fasterxml\jackson\core\jackson-annotations\2.8.5\jackson-annotations-2.8.5.jar;C:\Users\lw.m2\repository\com\fasterxml\jackson\core\jackson-core\2.8.5\jackson-core-2.8.5.jar;C:\Users\lw.m2\repository\org\springframework\spring-web\4.3.5.RELEASE\spring-web-4.3.5.RELEASE.jar;C:\Users\lw.m2\repository\org\springframework\spring-aop\4.3.5.RELEASE\spring-aop-4.3.5.RELEASE.jar;C:\Users\lw.m2\repository\org\springframework\spring-beans\4.3.5.RELEASE\spring-beans-4.3.5.RELEASE.jar;C:\Users\lw.m2\repository\org\springframework\spring-context\4.3.5.RELEASE\spring-context-4.3.5.RELEASE.jar;C:\Users\lw.m2\repository\org\springframework\spring-webmvc\4.3.5.RELEASE\spring-webmvc-4.3.5.RELEASE.jar;C:\Users\lw.m2\repository\org\springframework\spring-expression\4.3.5.RELEASE\spring-expression-4.3.5.RELEASE.jar;C:\Users\lw.m2\repository\com\alibaba\fastjson\1.2.15\fastjson-1.2.15.jar;C:\Users\lw.m2\repository\org\springframework\boot\spring-boot-devtools\1.4.3.RELEASE\spring-boot-devtools-1.4.3.RELEASE.jar;C:\Users\lw.m2\repository\org\springframework\boot\spring-boot\1.4.3.RELEASE\spring-boot-1.4.3.RELEASE.jar;C:\Users\lw.m2\repository\org\springframework\boot\spring-boot-autoconfigure\1.4.3.RELEASE\spring-boot-autoconfigure-1.4.3.RELEASE.jar" com.liwen.Appmin

. _ _
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\/ _)| |)| | | | | || (| | ) ) ) )
' |__| .|| ||| |\, | / / / /
=========|_|==============|__/=////
:: Spring Boot :: (v1.4.3.RELEASE)

2018-06-08 20:31:05.284 INFO 47016 --- [ restartedMain] com.liwen.Appmin : Starting Appmin on liwen-pc with PID 47016 (D:\TOOL\IDEASpace\comliwen\target\classes started by lw in D:\TOOL\IDEASpace\comliwen)
2018-06-08 20:31:05.288 INFO 47016 --- [ restartedMain] com.liwen.Appmin : No active profile set, falling back to default profiles: default
2018-06-08 20:31:05.539 INFO 47016 --- [ restartedMain] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@7a5c4347: startup date [Fri Jun 08 20:31:05 CST 2018]; root of context hierarchy
2018-06-08 20:31:07.800 INFO 47016 --- [ restartedMain] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)
2018-06-08 20:31:07.813 INFO 47016 --- [ restartedMain] o.apache.catalina.core.StandardService : Starting service Tomcat
2018-06-08 20:31:07.814 INFO 47016 --- [ restartedMain] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.6
2018-06-08 20:31:07.929 INFO 47016 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2018-06-08 20:31:07.929 INFO 47016 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 2395 ms
2018-06-08 20:31:08.160 INFO 47016 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Mapping servlet: 'dispatcherServlet' to [/]
2018-06-08 20:31:08.167 INFO 47016 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/]
2018-06-08 20:31:08.168 INFO 47016 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/]
2018-06-08 20:31:08.168 INFO 47016 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/]
2018-06-08 20:31:08.168 INFO 47016 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/]
2018-06-08 20:31:08.709 INFO 47016 --- [ restartedMain] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@7a5c4347: startup date [Fri Jun 08 20:31:05 CST 2018]; root of context hierarchy
2018-06-08 20:31:08.809 INFO 47016 --- [ restartedMain] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/hello]}" onto public java.lang.String com.liwen.HellCotroller.Hello()
2018-06-08 20:31:08.815 INFO 47016 --- [ restartedMain] 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)
2018-06-08 20:31:08.816 INFO 47016 --- [ restartedMain] 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)
2018-06-08 20:31:08.889 INFO 47016 --- [ restartedMain] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/webjars/] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-06-08 20:31:08.889 INFO 47016 --- [ restartedMain] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-06-08 20:31:09.035 INFO 47016 --- [ restartedMain] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-06-08 20:31:09.342 INFO 47016 --- [ restartedMain] o.s.b.d.a.OptionalLiveReloadServer : LiveReload server is running on port 35729
2018-06-08 20:31:09.441 INFO 47016 --- [ restartedMain] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2018-06-08 20:31:09.512 INFO 47016 --- [ restartedMain] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080 (http)
2018-06-08 20:31:09.524 INFO 47016 --- [ restartedMain] com.liwen.Appmin : Started Appmin in 5.379 seconds (JVM running for 11.402)
2018-06-08 20:31:49.510 INFO 47016 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring FrameworkServlet 'dispatcherServlet'
2018-06-08 20:31:49.510 INFO 47016 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : FrameworkServlet 'dispatcherServlet': initialization started
2018-06-08 20:31:49.536 INFO 47016 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : FrameworkServlet 'dispatcherServlet': initialization completed in 26 ms