1 eclipse创建maven项目，快速搭建spring boot项目
maven的好处在于可以帮助我们管理我们的项目，当需要用到某些依赖的时候，它会自动进行下载。
如果是首次创建maven项目，可能打开工程的时候会进行一些配置，需要等待10来分钟。
配置完成之后：
然后修改pom.xml中代码：
<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.mydre</groupId>
<artifactId>miaosha_1</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>miaosha_1</name>
<url>http://maven.apache.org</url>
<parent><groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.9.RELEASE</version>
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>
</project>
然后，
关于spring的有controller，service，dao，所以修改包结构：
在DemoController.java中添加如下代码：
package com.mydre.miaosha.controller;
import org.springframework.boot.*;
import org.springframework.boot.autoconfigure.*;
import org.springframework.stereotype.*;
import org.springframework.web.bind.annotation.*;
@Controller
@EnableAutoConfiguration
public class DemoController {
@RequestMapping("/")
@ResponseBody
String home() {
return "Hello World 77777!";
}
public static void main(String[] args) throws Exception {
SpringApplication.run(DemoController.class, args);
}
}
然后，run as Java Application
然后console控制台会输出：
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v1.5.9.RELEASE)
2018-05-10 22:29:23.792 INFO 3260 --- [ main] c.m.miaosha.controller.DemoController : Starting DemoController on MS-20180414TFQM with PID 3260 (E:\java_workspace\miaosha_1\target\classes started by Administrator in E:\java_workspace\miaosha_1)
2018-05-10 22:29:23.795 INFO 3260 --- [ main] c.m.miaosha.controller.DemoController : No active profile set, falling back to default profiles: default
2018-05-10 22:29:23.839 INFO 3260 --- [ main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot[email protected]4563a: startup date [Thu May 10 22:29:23 GMT+08:00 2018]; root of context hierarchy
2018-05-10 22:29:25.449 INFO 3260 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)
2018-05-10 22:29:25.463 INFO 3260 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2018-05-10 22:29:25.464 INFO 3260 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.23
2018-05-10 22:29:25.572 INFO 3260 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2018-05-10 22:29:25.572 INFO 3260 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1734 ms
2018-05-10 22:29:25.731 INFO 3260 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Mapping servlet: 'dispatcherServlet' to [/]
2018-05-10 22:29:25.734 INFO 3260 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*]
2018-05-10 22:29:25.735 INFO 3260 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2018-05-10 22:29:25.735 INFO 3260 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2018-05-10 22:29:25.735 INFO 3260 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*]
2018-05-10 22:29:26.046 INFO 3260 --- [ main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot[email protected]4563a: startup date [Thu May 10 22:29:23 GMT+08:00 2018]; root of context hierarchy
2018-05-10 22:29:26.111 INFO 3260 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/]}" onto java.lang.String com.mydre.miaosha.controller.DemoController.home()
2018-05-10 22:29:26.114 INFO 3260 --- [ 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)
2018-05-10 22:29:26.115 INFO 3260 --- [ 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)
2018-05-10 22:29:26.204 INFO 3260 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-05-10 22:29:26.205 INFO 3260 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-05-10 22:29:26.245 INFO 3260 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-05-10 22:29:26.394 INFO 3260 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2018-05-10 22:29:26.452 INFO 3260 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080 (http)
2018-05-10 22:29:26.461 INFO 3260 --- [ main] c.m.miaosha.controller.DemoController : Started DemoController in 2.998 seconds (JVM running for 3.298)
2018-05-10 22:29:32.788 INFO 3260 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring FrameworkServlet 'dispatcherServlet'
2018-05-10 22:29:32.788 INFO 3260 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : FrameworkServlet 'dispatcherServlet': initialization started
2018-05-10 22:29:32.810 INFO 3260 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : FrameworkServlet 'dispatcherServlet': initialization completed in 22 ms
在浏览器中输入http://localhost:8080
spring boot太神奇了，这过程中没有安装tomcat，但是貌似tomcat在运行。
为了使项目更加规范，需要进行适当的修改：
新建MainApplication类，加入如下代码：
package com.mydre.miaosha;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class MainApplication {
public static void main(String[] args) throws Exception {
SpringApplication.run(MainApplication.class, args);
}
}
将DemoController.java修改如下：
package com.mydre.miaosha.controller;
//import org.springframework.boot.*;
//import org.springframework.boot.autoconfigure.*;
import org.springframework.stereotype.*;
import org.springframework.web.bind.annotation.*;
@Controller
//@EnableAutoConfiguration
public class DemoController {
@RequestMapping("/")
@ResponseBody
String home() {
return "Hello World 77777!";
}
// public static void main(String[] args) throws Exception {
// SpringApplication.run(DemoController.class, args);
// }
}