springboot第一波

源码地址：传送门
以前也有体验过一把springboot的爽，但时间一长基本就给忘的差不多了，本次就在IDEA上面再来过一遍，本来也对IDEA不是很熟悉，顺便也学习一些IDEA的操作。

Hello World

  • 以spring initializr的方式新建一个工程，填好包名、项目名基本就OK，只是中间记得勾选web模块
    构建完项目结构长下面这样：

    image.png

    目录结构解释：

  • SpringbootApplication：项目的启动类。有一个 main() 方法，只要运行这个main方法就可以启动项目，不需要依赖额外的tomcat。

  • application.properties：项目的配置文件。（PS：后期我们会修改为 yaml文件）

  • pom.xml：maven依赖文件

  • 写个测试类：
package com.cqu.springboot;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class HelloWorldController {
    /**
 15     * 测试项目
 16     *
 17     * @return 字符串
 18     */
            @GetMapping("/helloWorld")
    public String helloWorld() {
                return "hello world,I am Spring Boot";
            }
}

小插曲：期间IDEA根据maven配置引入spring相关的包的时候速度有些感人，不清楚为什么，我的中央仓库应该是有这些包的，但是很多还是在线下载的。。。

  • 右击运行


    image.png
  • 状态提示
"C:\Program Files\Java\jdk1.8.0_152\bin\java" -XX:TieredStopAtLevel=1 -noverify -Dspring.output.ansi.enabled=always -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=4307 -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -Djava.rmi.server.hostname=localhost -Dspring.liveBeansView.mbeanDomain -Dspring.application.admin.enabled=true "-javaagent:D:\IntelliJ IDEA\lib\idea_rt.jar=4308:D:\IntelliJ IDEA\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\Java\jdk1.8.0_152\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\ext\sunpkcs11.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\ext\zipfs.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\jce.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\jfxswt.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\resources.jar;C:\Program Files\Java\jdk1.8.0_152\jre\lib\rt.jar;D:\my_project\idea_pro_inuse\springboot5\target\classes;D:\maven\apache-maven-3.5.2\mvn\mvnrepository\org\springframework\boot\spring-boot-starter-web\2.0.3.RELEASE\spring-boot-starter-web-2.0.3.RELEASE.jar;D:\maven\apache-maven-3.5.2\mvn\mvnrepository\org\springframework\boot\spring-boot-starter\2.0.3.RELEASE\spring-boot-starter-2.0.3.RELEASE.jar;D:\maven\apache-maven-3.5.2\mvn\mvnrepository\org\springframework\boot\spring-boot\2.0.3.RELEASE\spring-boot-2.0.3.RELEASE.jar;D:\maven\apache-maven-3.5.2\mvn\mvnrepository\org\springframework\boot\spring-boot-autoconfigure\2.0.3.RELEASE\spring-boot-autoconfigure-2.0.3.RELEASE.jar;D:\maven\apache-maven-3.5.2\mvn\mvnrepository\org\springframework\boot\spring-boot-starter-logging\2.0.3.RELEASE\spring-boot-starter-logging-2.0.3.RELEASE.jar;D:\maven\apache-maven-3.5.2\mvn\mvnrepository\ch\qos\logback\logback-classic\1.2.3\logback-classic-1.2.3.jar;D:\maven\apache-maven-3.5.2\mvn\mvnrepository\ch\qos\logback\logback-core\1.2.3\logback-core-1.2.3.jar;D:\maven\apache-maven-3.5.2\mvn\mvnrepository\org\apache\logging\log4j\log4j-to-slf4j\2.10.0\log4j-to-slf4j-2.10.0.jar;D:\maven\apache-maven-3.5.2\mvn\mvnrepository\org\apache\logging\log4j\log4j-api\2.10.0\log4j-api-2.10.0.jar;D:\maven\apache-maven-3.5.2\mvn\mvnrepository\org\slf4j\jul-to-slf4j\1.7.25\jul-to-slf4j-1.7.25.jar;D:\maven\apache-maven-3.5.2\mvn\mvnrepository\javax\annotation\javax.annotation-api\1.3.2\javax.annotation-api-1.3.2.jar;D:\maven\apache-maven-3.5.2\mvn\mvnrepository\org\yaml\snakeyaml\1.19\snakeyaml-1.19.jar;D:\maven\apache-maven-3.5.2\mvn\mvnrepository\org\springframework\boot\spring-boot-starter-json\2.0.3.RELEASE\spring-boot-starter-json-2.0.3.RELEASE.jar;D:\maven\apache-maven-3.5.2\mvn\mvnrepository\com\fasterxml\jackson\core\jackson-databind\2.9.6\jackson-databind-2.9.6.jar;D:\maven\apache-maven-3.5.2\mvn\mvnrepository\com\fasterxml\jackson\core\jackson-annotations\2.9.0\jackson-annotations-2.9.0.jar;D:\maven\apache-maven-3.5.2\mvn\mvnrepository\com\fasterxml\jackson\core\jackson-core\2.9.6\jackson-core-2.9.6.jar;D:\maven\apache-maven-3.5.2\mvn\mvnrepository\com\fasterxml\jackson\datatype\jackson-datatype-jdk8\2.9.6\jackson-datatype-jdk8-2.9.6.jar;D:\maven\apache-maven-3.5.2\mvn\mvnrepository\com\fasterxml\jackson\datatype\jackson-datatype-jsr310\2.9.6\jackson-datatype-jsr310-2.9.6.jar;D:\maven\apache-maven-3.5.2\mvn\mvnrepository\com\fasterxml\jackson\module\jackson-module-parameter-names\2.9.6\jackson-module-parameter-names-2.9.6.jar;D:\maven\apache-maven-3.5.2\mvn\mvnrepository\org\springframework\boot\spring-boot-starter-tomcat\2.0.3.RELEASE\spring-boot-starter-tomcat-2.0.3.RELEASE.jar;D:\maven\apache-maven-3.5.2\mvn\mvnrepository\org\apache\tomcat\embed\tomcat-embed-core\8.5.31\tomcat-embed-core-8.5.31.jar;D:\maven\apache-maven-3.5.2\mvn\mvnrepository\org\apache\tomcat\embed\tomcat-embed-el\8.5.31\tomcat-embed-el-8.5.31.jar;D:\maven\apache-maven-3.5.2\mvn\mvnrepository\org\apache\tomcat\embed\tomcat-embed-websocket\8.5.31\tomcat-embed-websocket-8.5.31.jar;D:\maven\apache-maven-3.5.2\mvn\mvnrepository\org\hibernate\validator\hibernate-validator\6.0.10.Final\hibernate-validator-6.0.10.Final.jar;D:\maven\apache-maven-3.5.2\mvn\mvnrepository\javax\validation\validation-api\2.0.1.Final\validation-api-2.0.1.Final.jar;D:\maven\apache-maven-3.5.2\mvn\mvnrepository\org\jboss\logging\jboss-logging\3.3.2.Final\jboss-logging-3.3.2.Final.jar;D:\maven\apache-maven-3.5.2\mvn\mvnrepository\com\fasterxml\classmate\1.3.4\classmate-1.3.4.jar;D:\maven\apache-maven-3.5.2\mvn\mvnrepository\org\springframework\spring-web\5.0.7.RELEASE\spring-web-5.0.7.RELEASE.jar;D:\maven\apache-maven-3.5.2\mvn\mvnrepository\org\springframework\spring-beans\5.0.7.RELEASE\spring-beans-5.0.7.RELEASE.jar;D:\maven\apache-maven-3.5.2\mvn\mvnrepository\org\springframework\spring-webmvc\5.0.7.RELEASE\spring-webmvc-5.0.7.RELEASE.jar;D:\maven\apache-maven-3.5.2\mvn\mvnrepository\org\springframework\spring-aop\5.0.7.RELEASE\spring-aop-5.0.7.RELEASE.jar;D:\maven\apache-maven-3.5.2\mvn\mvnrepository\org\springframework\spring-context\5.0.7.RELEASE\spring-context-5.0.7.RELEASE.jar;D:\maven\apache-maven-3.5.2\mvn\mvnrepository\org\springframework\spring-expression\5.0.7.RELEASE\spring-expression-5.0.7.RELEASE.jar;D:\maven\apache-maven-3.5.2\mvn\mvnrepository\org\slf4j\slf4j-api\1.7.25\slf4j-api-1.7.25.jar;D:\maven\apache-maven-3.5.2\mvn\mvnrepository\org\springframework\spring-core\5.0.7.RELEASE\spring-core-5.0.7.RELEASE.jar;D:\maven\apache-maven-3.5.2\mvn\mvnrepository\org\springframework\spring-jcl\5.0.7.RELEASE\spring-jcl-5.0.7.RELEASE.jar" com.cqu.springboot.SpringbootApplication

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.0.3.RELEASE)

2018-07-03 18:43:07.681  INFO 5468 --- [           main] c.cqu.springboot.SpringbootApplication   : Starting SpringbootApplication on DESKTOP-U0KTP79 with PID 5468 (D:\my_project\idea_pro_inuse\springboot5\target\classes started by AUGUSTRUSH in D:\my_project\idea_pro_inuse\springboot5)
2018-07-03 18:43:07.744  INFO 5468 --- [           main] c.cqu.springboot.SpringbootApplication   : No active profile set, falling back to default profiles: default
2018-07-03 18:43:08.024  INFO 5468 --- [           main] ConfigServletWebServerApplicationContext : Refreshing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@527e5409: startup date [Tue Jul 03 18:43:07 CST 2018]; root of context hierarchy
2018-07-03 18:43:11.786  INFO 5468 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
2018-07-03 18:43:11.873  INFO 5468 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2018-07-03 18:43:11.873  INFO 5468 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet Engine: Apache Tomcat/8.5.31
2018-07-03 18:43:11.904  INFO 5468 --- [ost-startStop-1] o.a.catalina.core.AprLifecycleListener   : The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: [C:\Program Files\Java\jdk1.8.0_152\bin;C:\WINDOWS\Sun\Java\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v9.0\bin;C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v9.0\libnvvp;C:\ProgramData\Oracle\Java\javapath;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\Program Files\Java\jdk1.8.0_152\bin;C:\Program Files\Java\jdk1.8.0_152\jre\bin;D:\maven\apache-maven-3.5.2\bin;D:\Anaconda3;D:\Anaconda3\Scripts;D:\yeshen_me\Nox\bin;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v9.0\bin;C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v9.0\lib\x64;C:\Program Files\CMake;C:\Program Files\CMake\bin;C:\WINDOWS\system32\config\systemprofile\.dnx\bin;C:\Program Files\Microsoft DNX\Dnvm\;C:\Program Files\Microsoft SQL Server\130\Tools\Binn\;C:\local\boost_1_66_0;C:\Program Files (x86)\Microsoft SDKs\Windows\v7.1A\Bin;E:\mylove\wget;C:\Git\cmd;C:\Users\AUGUSTRUSH\AppData\Local\Microsoft\WindowsApps;.]
2018-07-03 18:43:12.241  INFO 5468 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2018-07-03 18:43:12.241  INFO 5468 --- [ost-startStop-1] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 4250 ms
2018-07-03 18:43:12.538  INFO 5468 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean  : Servlet dispatcherServlet mapped to [/]
2018-07-03 18:43:12.575  INFO 5468 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'characterEncodingFilter' to: [/*]
2018-07-03 18:43:12.575  INFO 5468 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2018-07-03 18:43:12.575  INFO 5468 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2018-07-03 18:43:12.575  INFO 5468 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'requestContextFilter' to: [/*]
2018-07-03 18:43:13.116  INFO 5468 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-07-03 18:43:13.873  INFO 5468 --- [           main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@527e5409: startup date [Tue Jul 03 18:43:07 CST 2018]; root of context hierarchy
2018-07-03 18:43:14.202  INFO 5468 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/helloWorld],methods=[GET]}" onto public java.lang.String com.cqu.springboot.HelloWorldController.helloWorld()
2018-07-03 18:43:14.208  INFO 5468 --- [           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.servlet.error.BasicErrorController.error(javax.servlet.http.HttpServletRequest)
2018-07-03 18:43:14.208  INFO 5468 --- [           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.servlet.error.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)
2018-07-03 18:43:14.224  INFO 5468 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-07-03 18:43:14.224  INFO 5468 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-07-03 18:43:14.722  INFO 5468 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Registering beans for JMX exposure on startup
2018-07-03 18:43:14.788  INFO 5468 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path ''
2018-07-03 18:43:14.788  INFO 5468 --- [           main] c.cqu.springboot.SpringbootApplication   : Started SpringbootApplication in 12.134 seconds (JVM running for 18.795)
2018-07-03 18:45:14.600  INFO 5468 --- [nio-8080-exec-2] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring FrameworkServlet 'dispatcherServlet'
2018-07-03 18:45:14.600  INFO 5468 --- [nio-8080-exec-2] o.s.web.servlet.DispatcherServlet        : FrameworkServlet 'dispatcherServlet': initialization started
2018-07-03 18:45:14.769  INFO 5468 --- [nio-8080-exec-2] o.s.web.servlet.DispatcherServlet        : FrameworkServlet 'dispatcherServlet': initialization completed in 168 ms

诺，就可以输入地址测试了。

  • 测试


    image.png
  • 自定义配置
    把resources下的Application.properties改为Application.yml
    增加以下内容
server:
  port: 9090
  servlet:
    context-path: /springboot5

  • 再测试


    image.png
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