Myeclipse 搭建SpringBoot基本HelloWorld


pom.xml文件

<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>laynef.demo</groupId>
  <artifactId>SpringBoot</artifactId>
  <version>0.0.1-SNAPSHOT</version>
 <!-- 引用依赖的父包 -->
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.1.RELEASE</version>
    </parent>


    <!--maven的插件 -->
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <!-- 打成jar包后所执行的主函数 -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-jar-plugin</artifactId>
                <configuration>
                    <archive>
                        <manifest>
                            <addClasspath>true</addClasspath>
                            <mainClass>com.pzr.consumer.test.OfficialDemo</mainClass>
                        </manifest>
                    </archive>
                </configuration>
            </plugin>
        </plugins>
    </build>

    <!-- 依赖包 -->
    <dependencies>
        <!-- spring boot需要的包 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
    </dependencies>

</project>


类代码:

package laynef.demo;

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.ResponseBody;

@Controller
@EnableAutoConfiguration
public class HelloWorld {
    @RequestMapping("/test")
    @ResponseBody
    String home() {
        return "Hello World!";
    }

    public static void main(String[] args) throws Exception {
        SpringApplication.run(HelloWorld.class, args);
    }
}

启动main方法


  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v1.5.1.RELEASE)

2018-05-08 14:41:07.836  INFO 5080 --- [           main] laynef.demo.HelloWorld                   : Starting HelloWorld on WQRYBB9I6ISPM09 with PID 5080 (E:\Project\SpringBoot\target\classes started by Administrator in E:\Project\SpringBoot)
2018-05-08 14:41:07.839  INFO 5080 --- [           main] laynef.demo.HelloWorld                   : No active profile set, falling back to default profiles: default
2018-05-08 14:41:07.930  INFO 5080 --- [           main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@68c46ab0: startup date [Tue May 08 14:41:07 CST 2018]; root of context hierarchy
2018-05-08 14:41:08.876  INFO 5080 --- [           main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.boot.autoconfigure.validation.ValidationAutoConfiguration' of type [class org.springframework.boot.autoconfigure.validation.ValidationAutoConfiguration] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2018-05-08 14:41:08.996  INFO 5080 --- [           main] trationDelegate$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)
2018-05-08 14:41:09.393  INFO 5080 --- [           main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)
2018-05-08 14:41:09.423  INFO 5080 --- [           main] o.apache.catalina.core.StandardService   : Starting service Tomcat
2018-05-08 14:41:09.424  INFO 5080 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet Engine: Apache Tomcat/8.5.11
2018-05-08 14:41:09.550  INFO 5080 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2018-05-08 14:41:09.550  INFO 5080 --- [ost-startStop-1] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 1632 ms
2018-05-08 14:41:09.746  INFO 5080 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean  : Mapping servlet: 'dispatcherServlet' to [/]
2018-05-08 14:41:09.750  INFO 5080 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'characterEncodingFilter' to: [/*]
2018-05-08 14:41:09.750  INFO 5080 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2018-05-08 14:41:09.751  INFO 5080 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2018-05-08 14:41:09.751  INFO 5080 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'requestContextFilter' to: [/*]
2018-05-08 14:41:10.163  INFO 5080 --- [           main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@68c46ab0: startup date [Tue May 08 14:41:07 CST 2018]; root of context hierarchy
2018-05-08 14:41:10.267  INFO 5080 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/test]}" onto java.lang.String laynef.demo.HelloWorld.home()
2018-05-08 14:41:10.272  INFO 5080 --- [           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)
2018-05-08 14:41:10.273  INFO 5080 --- [           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)
2018-05-08 14:41:10.334  INFO 5080 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-05-08 14:41:10.335  INFO 5080 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-05-08 14:41:10.389  INFO 5080 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-05-08 14:41:10.666  INFO 5080 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Registering beans for JMX exposure on startup
2018-05-08 14:41:10.750  INFO 5080 --- [           main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080 (http)
2018-05-08 14:41:10.753  INFO 5080 --- [           main] laynef.demo.HelloWorld                   : Started HelloWorld in 3.682 seconds (JVM running for 4.406)
2018-05-08 14:42:00.537  INFO 5080 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring FrameworkServlet 'dispatcherServlet'
2018-05-08 14:42:00.537  INFO 5080 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : FrameworkServlet 'dispatcherServlet': initialization started
2018-05-08 14:42:00.572  INFO 5080 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : FrameworkServlet 'dispatcherServlet': initialization completed in 35 ms

浏览器访问网址http://localhost:8080/test




使用 Spring Boot 的优势 使用 Spring Boot 开发项目,会给我们带来非常美妙的开发体验,可以从以下几个方面展开来说明 Spring Boot 让开发变得更简单 Spring Boot 对开发效率的提升是全方位的,我们可以简单做一下对比: 在没有使用 Spring Boot 之前我们开发一个 web 项目需要做哪些工作: 1)配置 web.xml,加载 SpringSpring mvc 2)配置数据库连接、配置 Spring 事务 3)配置加载配置文件的读取,开启注解 4)配置日志文件 … n) 配置完成之后部署 tomcat 调试 可能你还需要考虑各个版本的兼容性,jar 包冲突的各种可行性。 那么使用 Spring Boot 之后我们需要开发一个 web 项目需要哪些操作呢? 1)登录网址 http://start.spring.io/ 选择对应的组件直接下载 2)导入项目,直接开发 上面的 N 步和下面的2步形成巨大的反差,这仅仅只是在开发环境搭建的这个方面。 Spring Boot 使测试变得更简单 Spring Boot 对测试的支持不可谓不强大,Spring Boot 内置了7种强大的测试框架: JUnit: 一个 Java 语言的单元测试框架 Spring Test & Spring Boot Test:为 Spring Boot 应用提供集成测试和工具支持 AssertJ:支持流式断言的 Java 测试框架 Hamcrest:一个匹配器库 Mockito:一个 java mock 框架 JSONassert:一个针对 JSON 的断言库 JsonPath:JSON XPath 库 我们只需要在项目中引入 spring-boot-start-test依赖包,就可以对数据库、Mock、 Web 等各种情况进行测试。 Spring Boot Test 中包含了我们需要使用的各种测试场景,满足我们日常项目的测试需求。
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