Spring Boot 初探[1]--快速搭建Spring Boot项目

时间：2021-11-23 05:36:54

写在前面:

为什么使用Spring Boot?

　　1.现在的项目使用tomcat+springMVC进行构建.每次搭建一个新的环境都需要重新配置tomcat等等一堆东西.水平扩展性比较差.

　　2.Spring Boot 可以简单的一个java -jar就能运行.后续结合容器技术部署更为方便.开发,运行,调试也更为方便.

0.环境说明:

　　Java 1.7 + Eclipse 4.3 + maven 3.3.3 + Spring Boot1.3.1.RELEASE

1.构建maven项目

eclipse:

　　file -> new -> project -> maven project -> quick start

　　填写各种名称

　　配置jdk版本为1.7

2.加入Spring Boot相关配置

　　

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.3.1.RELEASE</version>
</parent>
<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
</dependencies>

3.编写Boot类

import java.util.Arrays;

import org.springframework.context.ApplicationContext;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

/**
 * boot class
 * 
 * @author BeeNoisy<br>
 */
@SpringBootApplication
public class Boot {
    public static void main(
                    String[] args) {
        ApplicationContext ctx = SpringApplication.run(Boot.class, args);
        System.out.println("Let's inspect the beans provided by Spring Boot:");
    }
}

4.编写Controller类

import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

/**
 * boot
 * 
 * @author BeeNoisy<br>
 */
@Controller
@EnableAutoConfiguration
public class HelloController {

    @RequestMapping("/")
    @ResponseBody
    public String hello() {
        return "Hello spring boot";
    }
}
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;

/**
 * rest controller
 * 
 * @author ziyi.wang<br>
 */
@Controller
@EnableAutoConfiguration
@RequestMapping("rest")
public class RestController {

    @RequestMapping(method = RequestMethod.GET)
    @ResponseBody
    public String get() {
        return "RestController.get()";
    }

    @RequestMapping(method = RequestMethod.POST)
    public String post() {
        return "RestController.post()";
    }
}

5.运行

直接运行Boot类:

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v1.3.1.RELEASE)

2016-01-14 16:20:04.721  INFO 21956 --- [           main] com.didichuxing.didi.cx.app.boot.Boot    : Starting Boot on Keen with PID 21956 (C:\dev\workspace\didi-cx-app-spring-boot\target\classes started by BeeNoisy in C:\dev\workspace\didi-cx-app-spring-boot)
2016-01-14 16:20:04.723  INFO 21956 --- [           main] com.didichuxing.didi.cx.app.boot.Boot    : No active profile set, falling back to default profiles: default
2016-01-14 16:20:04.764  INFO 21956 --- [           main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@78fd4889: startup date [Thu Jan 14 16:20:04 CST 2016]; root of context hierarchy
2016-01-14 16:20:05.750  INFO 21956 --- [           main] o.s.b.f.s.DefaultListableBeanFactory     : Overriding bean definition for bean 'beanNameViewResolver' with a different definition: replacing [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=org.springframework.boot.autoconfigure.web.ErrorMvcAutoConfiguration$WhitelabelErrorViewConfiguration; factoryMethodName=beanNameViewResolver; initMethodName=null; destroyMethodName=(inferred); defined in class path resource [org/springframework/boot/autoconfigure/web/ErrorMvcAutoConfiguration$WhitelabelErrorViewConfiguration.class]] with [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$WebMvcAutoConfigurationAdapter; factoryMethodName=beanNameViewResolver; initMethodName=null; destroyMethodName=(inferred); defined in class path resource [org/springframework/boot/autoconfigure/web/WebMvcAutoConfiguration$WebMvcAutoConfigurationAdapter.class]]
2016-01-14 16:20:06.290  INFO 21956 --- [           main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)
2016-01-14 16:20:06.299  INFO 21956 --- [           main] o.apache.catalina.core.StandardService   : Starting service Tomcat
2016-01-14 16:20:06.300  INFO 21956 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet Engine: Apache Tomcat/8.0.30
2016-01-14 16:20:06.372  INFO 21956 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2016-01-14 16:20:06.372  INFO 21956 --- [ost-startStop-1] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 1610 ms
2016-01-14 16:20:06.652  INFO 21956 --- [ost-startStop-1] o.s.b.c.e.ServletRegistrationBean        : Mapping servlet: 'dispatcherServlet' to [/]
2016-01-14 16:20:06.656  INFO 21956 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean  : Mapping filter: 'characterEncodingFilter' to: [/*]
2016-01-14 16:20:06.657  INFO 21956 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean  : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2016-01-14 16:20:06.657  INFO 21956 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean  : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2016-01-14 16:20:06.657  INFO 21956 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean  : Mapping filter: 'requestContextFilter' to: [/*]
2016-01-14 16:20:06.803  INFO 21956 --- [           main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@78fd4889: startup date [Thu Jan 14 16:20:04 CST 2016]; root of context hierarchy
2016-01-14 16:20:06.871  INFO 21956 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/]}" onto public java.lang.String com.didichuxing.didi.cx.app.boot.controller.HelloController.hello()
2016-01-14 16:20:06.875  INFO 21956 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/rest],methods=[GET]}" onto public java.lang.String com.didichuxing.didi.cx.app.boot.controller.RestController.get()
2016-01-14 16:20:06.875  INFO 21956 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/rest],methods=[POST]}" onto public java.lang.String com.didichuxing.didi.cx.app.boot.controller.RestController.post()
2016-01-14 16:20:06.877  INFO 21956 --- [           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)
2016-01-14 16:20:06.878  INFO 21956 --- [           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)
2016-01-14 16:20:06.907  INFO 21956 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2016-01-14 16:20:06.907  INFO 21956 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2016-01-14 16:20:06.946  INFO 21956 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2016-01-14 16:20:07.067  INFO 21956 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Registering beans for JMX exposure on startup
2016-01-14 16:20:07.144  INFO 21956 --- [           main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080 (http)
2016-01-14 16:20:07.148  INFO 21956 --- [           main] com.didichuxing.didi.cx.app.boot.Boot    : Started Boot in 2.681 seconds (JVM running for 2.896)
Let's inspect the beans provided by Spring Boot:

服务器启动完毕,看倒数第二行:Tomcat started on port(s): 8080 (http)

然后测试即可.

curl http://127.0.0.1:8080/
Hello spring boot

curl http://127.0.0.1:8080/rest
RestController.get()

 至此,SpringBoot的Demo工程搭建完毕.

参考:

http://projects.spring.io/spring-boot/#quick-start

http://docs.spring.io/spring-boot/docs/current-SNAPSHOT/reference/htmlsingle/

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