初尝试Spring boot

最新推荐文章于 2025-09-13 11:59:05 发布

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最新推荐文章于 2025-09-13 11:59:05 发布

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文章标签： java python web.xml

原文链接：https://my.oschina.net/u/1991646/blog/678217

本文介绍了如何使用Spring Boot创建一个简单的Web应用程序。通过构建Maven项目并添加必要的依赖，实现了自动配置，接着创建了一个RESTful控制器，并展示了如何启动应用。

2019独角兽企业重金招聘Python工程师标准>>>

早听说Spring boot这东东，今天也上手写了第一个Demo。

不喜欢长篇大论，马上开动：

项目使用Maven构建，没使用过Maven的童鞋自己脑补，首先在项目中pom.xml中引用需要的Spring boot引用

    <properties>
		<!-- 指定为UTF-8编码 -->
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<spring-boot-starter-web.version>1.3.5.RELEASE</spring-boot-starter-web.version>
	</properties>
    <dependencies>
		<!-- spring boot -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
			<version>${spring-boot-starter-web.version}</version>
		</dependency>
	</dependencies>

完成后即引完成jar的引用。

高潮来了，以前需要导入很多很多引用的，现在一个搞定，接下来该怎么做还是怎么做，建立一个自己的Controller：KissController.java

@RestController
@RequestMapping(value="/kiss")
@EnableAutoConfiguration
public class KissController {
	@RequestMapping(value="/get")
	@ResponseBody
	public Object getJson() {
		return new java.util.Date();
	}
}

这里注意多了个奇怪的注解@EnableAutoConfiguration，该注解的作用在于让 Spring Boot 根据应用所声明的依赖来对 Spring 框架进行自动配置，果然是好东东。

下一步就是引用了，再也不用像以前一样配置web.xml，启动tomcat了，直接上代码。

import cc.cc26.smallstone.action.controller.KissController;

public class Run {
	public static void main(String[] args) {
		SpringApplication.run(KissController.class, args);
	}
}

到了我们最喜欢的运行main方法，小激动了。看控制台整齐的打印，心里舒服的很。


  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v1.3.5.RELEASE)

2016-05-19 21:33:24.417  INFO 18008 --- [           main] cc.cc26.Run                              : Starting Run on SRY50JLDADCTC6K with PID 18008 (D:\workspace-mars.2s-other\smallstone\target\classes started by Administrator in D:\workspace-mars.2s-other\smallstone)
2016-05-19 21:33:24.419  INFO 18008 --- [           main] cc.cc26.Run                              : No active profile set, falling back to default profiles: default
2016-05-19 21:33:24.455  INFO 18008 --- [           main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@b9afc07: startup date [Thu May 19 21:33:24 CST 2016]; root of context hierarchy
2016-05-19 21:33:25.327  INFO 18008 --- [           main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)
2016-05-19 21:33:25.336  INFO 18008 --- [           main] o.apache.catalina.core.StandardService   : Starting service Tomcat
2016-05-19 21:33:25.337  INFO 18008 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet Engine: Apache Tomcat/8.0.33
2016-05-19 21:33:25.404  INFO 18008 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2016-05-19 21:33:25.404  INFO 18008 --- [ost-startStop-1] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 952 ms
2016-05-19 21:33:25.568  INFO 18008 --- [ost-startStop-1] o.s.b.c.e.ServletRegistrationBean        : Mapping servlet: 'dispatcherServlet' to [/]
2016-05-19 21:33:25.570  INFO 18008 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean  : Mapping filter: 'characterEncodingFilter' to: [/*]
2016-05-19 21:33:25.571  INFO 18008 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean  : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2016-05-19 21:33:25.571  INFO 18008 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean  : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2016-05-19 21:33:25.571  INFO 18008 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean  : Mapping filter: 'requestContextFilter' to: [/*]
2016-05-19 21:33:25.735  INFO 18008 --- [           main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@b9afc07: startup date [Thu May 19 21:33:24 CST 2016]; root of context hierarchy
2016-05-19 21:33:25.781  INFO 18008 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/simple/get]}" onto public java.lang.Object cc.cc26.smallstone.action.controller.SimpleController.getJson()
2016-05-19 21:33:25.783  INFO 18008 --- [           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)
2016-05-19 21:33:25.784  INFO 18008 --- [           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)
2016-05-19 21:33:25.799  INFO 18008 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2016-05-19 21:33:25.799  INFO 18008 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2016-05-19 21:33:25.824  INFO 18008 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2016-05-19 21:33:25.885  INFO 18008 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Registering beans for JMX exposure on startup
2016-05-19 21:33:25.935  INFO 18008 --- [           main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080 (http)
2016-05-19 21:33:25.938  INFO 18008 --- [           main] cc.cc26.Run                              : Started Run in 1.718 seconds (JVM running for 1.971)
2016-05-19 21:33:49.578  INFO 18008 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring FrameworkServlet 'dispatcherServlet'
2016-05-19 21:33:49.579  INFO 18008 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : FrameworkServlet 'dispatcherServlet': initialization started
2016-05-19 21:33:49.589  INFO 18008 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : FrameworkServlet 'dispatcherServlet': initialization completed in 10 ms

可以清楚的看到，spring自动为我们配置了一个端口为8080的tomcat。ok，接下来访问http://localhost:8080/kiss/get 如果看到了你们想要的结果，就祝福我明天能捡到钱吧。哈哈

想着两个问题来着，还没研究

1. 我想改变tomcat的默认端口

2.多个controller需要多个启动配置吗

下次分晓吧~

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转载于:https://my.oschina.net/u/1991646/blog/678217