这里我们记录一下springboot的使用，第一次创建环境。
springboot的使用
项目结构如下：
一、我们使用maven去构建springboot的依赖。其中我们使用的pom.xml文件内容如下：
<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>com.linux.huhx</groupId> <artifactId>SpringBootTest</artifactId> <version>0.0.1-SNAPSHOT</version> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> <version>1.5.1.RELEASE</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>1.7</source> <target>1.7</target> </configuration> </plugin> </plugins> </build> </project>
build里面是使用jre1.7去构建项目，我下载的maven默认是用1.5。依赖下载的jar包如下。
spring-boot-starter-web-1.5.1.RELEASE.jar spring-boot-starter-1.5.1.RELEASE.jar spring-boot-1.5.1.RELEASE.jar spring-boot-autoconfigure-1.5.1.RELEASE.jar spring-boot-starter-logging-1.5.1.RELEASE.jar logback-classic-1.1.9.jar logback-core-1.1.9.jar slf4j-api-1.7.22.jar jcl-over-slf4j-1.7.22.jar jul-to-slf4j-1.7.22.jar log4j-over-slf4j-1.7.22.jar spring-core-4.3.6.RELEASE.jar snakeyaml-1.17.jar spring-boot-starter-tomcat-1.5.1.RELEASE.jar tomcat-embed-core-8.5.11.jar tomcat-embed-el-8.5.11.jar tomcat-embed-websocket-8.5.11.jar hibernate-validator-5.3.4.Final.jar validation-api-1.1.0.Final.jar jboss-logging-3.3.0.Final.jar classmate-1.3.1.jar jackson-databind-2.8.6.jar jackson-annotations-2.8.0.jar jackson-core-2.8.6.jar spring-web-4.3.6.RELEASE.jar spring-aop-4.3.6.RELEASE.jar spring-beans-4.3.6.RELEASE.jar spring-context-4.3.6.RELEASE.jar spring-webmvc-4.3.6.RELEASE.jar spring-expression-4.3.6.RELEASE.jar
二、SimpleController.java的代码如下：
package com.linux.huhx; 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) @ResponseBody public String hello() { return "hello world"; } public static void main(String[] args) { SpringApplication.run(SimpleController.class, args); } }
三、右击run，运行SimpleController的java项目。会有大致以下的输出日志。
. ____ _ __ _ _ /\ / ___'_ __ _ _(_)_ __ __ _ ( ( )\___ | '_ | '_| | '_ / _` | \/ ___)| |_)| | | | | || (_| | ) ) ) ) ' |____| .__|_| |_|_| |_\__, | / / / / =========|_|==============|___/=/_/_/_/ :: Spring Boot :: (v1.5.1.RELEASE) 2017-02-24 17:43:31.997 INFO 19476 --- [ main] com.linux.huhx.SimpleController : Starting SimpleController on Linux with PID 19476 (G:JavaJavaEEProgram2016-11-18SpringBootTest argetclasses started by huhx in G:JavaJavaEEProgram2016-11-18SpringBootTest) 2017-02-24 17:43:32.003 INFO 19476 --- [ main] com.linux.huhx.SimpleController : No active profile set, falling back to default profiles: default 2017-02-24 17:43:32.064 INFO 19476 --- [ main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@293f78d3: startup date [Fri Feb 24 17:43:32 CST 2017]; root of context hierarchy 2017-02-24 17:43:33.331 INFO 19476 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.boot.autoconfigure.validation.ValidationAutoConfiguration' of type [class org.springframework.boot.autoconfigure.validation.ValidationAutoConfiguration] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 2017-02-24 17:43:33.408 INFO 19476 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'validator' of type [class org.springframework.validation.beanvalidation.LocalValidatorFactoryBean] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 2017-02-24 17:43:33.942 INFO 19476 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http) 2017-02-24 17:43:33.953 INFO 19476 --- [ main] o.apache.catalina.core.StandardService : Starting service Tomcat 2017-02-24 17:43:33.954 INFO 19476 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.11 2017-02-24 17:43:34.047 INFO 19476 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext 2017-02-24 17:43:34.048 INFO 19476 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1987 ms 2017-02-24 17:43:34.219 INFO 19476 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Mapping servlet: 'dispatcherServlet' to [/] 2017-02-24 17:43:34.223 INFO 19476 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*] 2017-02-24 17:43:34.224 INFO 19476 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*] 2017-02-24 17:43:34.224 INFO 19476 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*] 2017-02-24 17:43:34.225 INFO 19476 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*] 2017-02-24 17:43:34.545 INFO 19476 --- [ main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@293f78d3: startup date [Fri Feb 24 17:43:32 CST 2017]; root of context hierarchy 2017-02-24 17:43:34.668 INFO 19476 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/hello],methods=[GET]}" onto public java.lang.String com.linux.huhx.SimpleController.hello() 2017-02-24 17:43:34.674 INFO 19476 --- [ 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) 2017-02-24 17:43:34.674 INFO 19476 --- [ 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) 2017-02-24 17:43:34.721 INFO 19476 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler] 2017-02-24 17:43:34.721 INFO 19476 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler] 2017-02-24 17:43:34.784 INFO 19476 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler] 2017-02-24 17:43:35.042 INFO 19476 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup 2017-02-24 17:43:35.100 INFO 19476 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080 (http) 2017-02-24 17:43:35.105 INFO 19476 --- [ main] com.linux.huhx.SimpleController : Started SimpleController in 3.557 seconds (JVM running for 4.123)
四、在浏览器中输入: http://localhost:8080/hello。在页面会显示hello world字样。截图如下：
注意url不是：http://localhost:8080/SpringBootTest/hello
从中遇到的问题
一、启动时报错：Unable to start EmbeddedWebApplicationContext due to missing EmbeddedServletContainerFactory bean
解决方案：在SimpleController类上面，需要加上@EnableAutoConfiguration注解。
二、输入url运行：Whitelabel Error Page This application has no explicit mapping for /error, so you are seeing this as a fallback.
解决方案：在SimpleController类上面，需要加上@Controller注解。
友情链接
springboot的使用： http://www.cnblogs.com/God-/p/5857428.html