spring boot----第一天（初识，搬运官网内容）

来源：互联网发布：金山翻译软件编辑：程序博客网时间：2024/06/06 00:33

今天第一天正式开始学习spring boot，以下根据官网Building an Application with Spring Boot进行的学习

1、项目采用maven进行构建，相应的pom.xml如下：

  <build>    <finalName>springmvc</finalName>    <plugins>      <plugin>        <groupId>org.apache.maven.plugins</groupId>        <artifactId>maven-compiler-plugin</artifactId>        <configuration>          <source>1.8</source>          <target>1.8</target>        </configuration>      </plugin>    </plugins>  </build>    <parent>        <groupId>org.springframework.boot</groupId>        <artifactId>spring-boot-starter-parent</artifactId>        <version>1.5.5.RELEASE</version>    </parent>  <dependencies>      <dependency>          <groupId>org.springframework.boot</groupId>          <artifactId>spring-boot-starter-web</artifactId>      </dependency>    <dependency>      <groupId>org.springframework.boot</groupId>      <artifactId>spring-boot-starter-test</artifactId>      <scope>test</scope>    </dependency>  </dependencies>

今天在单元测试的时候，出现运行一直报错的情况，原因到最后查明是springboot版本跟spring版本jar包不兼容造成的，所以建议不要在pom.xml单独写spring的依赖,就只写springboot的，spring的自己就会自动加载，以免出现兼容问题。

2、编写HelloController

package com.jie.controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RestController;@RestControllerpublic class HelloController{    @RequestMapping("/")    public String index(){        return "hello spring boot";    }}

3、编写客户端类

package com.jie;import org.springframework.boot.CommandLineRunner;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;import org.springframework.context.ApplicationContext;import org.springframework.context.annotation.Bean;import java.util.Arrays;@SpringBootApplicationpublic class Application{    public static void main(String[] args) {        SpringApplication.run(Application.class,args);    }    @Bean    public CommandLineRunner commandLineRunner(ApplicationContext ctx){        return args -> {            System.out.println("let's inspect the  beans provided by Spring Boot:");            String [] beanNames = ctx.getBeanDefinitionNames();            Arrays.sort(beanNames);            for (String beanName : beanNames) {                System.out.println(beanName);            }        };    }}

4.运行以上

let's inspect the  beans provided by Spring Boot:applicationbasicErrorControllerbeanNameHandlerMappingbeanNameViewResolvercharacterEncodingFiltercommandLineRunnerconventionErrorViewResolverdefaultServletHandlerMappingdefaultValidatordefaultViewResolverdispatcherServletdispatcherServletRegistrationduplicateServerPropertiesDetectorembeddedServletContainerCustomizerBeanPostProcessorerrorerrorAttributeserrorPageCustomizererrorPageRegistrarBeanPostProcessorfaviconHandlerMappingfaviconRequestHandlerhandlerExceptionResolverhelloControllerhiddenHttpMethodFilterhttpPutFormContentFilterhttpRequestHandlerAdapterjacksonObjectMapperjacksonObjectMapperBuilderjsonComponentModulelocaleCharsetMappingsCustomizermappingJackson2HttpMessageConvertermbeanExportermbeanServermessageConvertersmethodValidationPostProcessormultipartConfigElementmultipartResolvermvcContentNegotiationManagermvcConversionServicemvcPathMatchermvcResourceUrlProvidermvcUriComponentsContributormvcUrlPathHelpermvcValidatormvcViewResolver

程序不抛异常，出现类似的这一段就说明运行成功
5、谢了这一会儿发现还是官网清楚，唉，写写屡屡思路吧

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