• Spring Boot快速入门


    本章将演示如何使用MavenGradle创建Spring Boot应用程序。

    前提条件

    系统需要具有以下创建Spring Boot应用程序的最低要求 -

    • Java 7
    • Maven 3.2
    • Gradle 2.5

    Spring Boot CLI

    Spring Boot CLI是一个命令行工具,它用于运行Groovy脚本。它是使用Spring Boot命令行界面创建Spring Boot应用程序的最简单方法。可以在命令提示符下创建,运行和测试应用程序。

    本节介绍手动安装Spring Boot CLI所涉及的步骤。 如需进一步的帮助,可以使用以下链接:

    还可以从Spring Software存储库下载Spring CLI发行版:

    对于手动安装,需要使用以下两个文件夹 -

    • spring-boot-cli-2.0.0.BUILD-SNAPSHOT-bin.zip
    • spring-boot-cli-2.0.0.BUILD-SNAPSHOT-bin.tar.gz

    下载后,解压缩归档文件并按照install.txt文件中给出的步骤进行操作。 并不是说它不需要任何环境设置。
    在Windows中,转到命令提示符下的Spring Boot CLI bin目录并运行命令spring --version以确保正确安装了spring CLI。 执行命令后,可以看到spring CLI版本,如下所示 -

    使用Groovy运行Hello World

    创建一个包含Rest Endpoint脚本的简单groovy文件:hello.groovy,并使用spring boot CLI运行groovy文件。代码如下所示 -

    @Controller
    class Example {
       @RequestMapping("/")
       @ResponseBody
       public String hello() {
          "Hello Spring Boot"
       }
    }
    
    Java

    请注意,在这个示例中,已经配置Spring Boot CLI bin目录到系统环境变量,并把文件:hello.groovy保存到D:/worksp/springboot/目录。使用命令spring run hello.groovy运行应用程序,如下面所示 -

    D:workspspringboot>spring run hello.groovy
    
    Shell

    执行结果如下所示:

    D:workspspringboot>spring run hello.groovy
    
      .   ____          _            __ _ _
     /\ / ___'_ __ _ _(_)_ __  __ _    
    ( ( )\___ | '_ | '_| | '_ / _` |    
     \/  ___)| |_)| | | | | || (_| |  ) ) ) )
      '  |____| .__|_| |_|_| |_\__, | / / / /
     =========|_|==============|___/=/_/_/_/
     :: Spring Boot ::        (v2.0.5.RELEASE)
    
    2018-09-26 09:34:13.782  INFO 13908 --- [       runner-0] o.s.boot.SpringApplication               : Starting application on DESKTOP-CAN8JLM with PID 13908 (started by hema in D:workspspringboot)
    2018-09-26 09:34:13.810  INFO 13908 --- [       runner-0] o.s.boot.SpringApplication               : No active profile set, falling back to default profiles: default
    2018-09-26 09:34:14.747  INFO 13908 --- [       runner-0] ConfigServletWebServerApplicationContext : Refreshing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@2ec39a62: startup date [Wed Sep 26 09:34:14 CST 2018]; root of context hierarchy
    2018-09-26 09:34:18.655  INFO 13908 --- [       runner-0] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
    2018-09-26 09:34:18.735  INFO 13908 --- [       runner-0] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
    2018-09-26 09:34:18.736  INFO 13908 --- [       runner-0] org.apache.catalina.core.StandardEngine  : Starting Servlet Engine: Apache Tomcat/8.5.34
    2018-09-26 09:34:18.756  INFO 13908 --- [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 (x86)Common FilesOracleJavajavapath;C:WINDOWSSunJavain;C:WINDOWSsystem32;C:WINDOWS;C:Program Files (x86)Common FilesOracleJavajavapath;C:WINDOWSsystem32;C:WINDOWS;C:WINDOWSSystem32Wbem;C:WINDOWSSystem32WindowsPowerShellv1.0;C:Program Files (x86)PuTTY;C:Program Filesdotnet;C:Program FilesMicrosoft SQL Server130ToolsBinn;C:WINDOWSSystem32OpenSSH;D:wampinphpphp7.0.29;C:Program Files (x86)
    odejs;D:softwarespring-2.0.5.RELEASEin;D:Program FilesPython3Scripts;D:Program FilesPython3;C:UsershemaAppDataLocalMicrosoftWindowsApps;C:UsershemaAppDataRoaming
    pm;.]
    2018-09-26 09:34:19.030  INFO 13908 --- [ost-startStop-1] org.apache.catalina.loader.WebappLoader  : Unknown loader org.springframework.boot.cli.compiler.ExtendedGroovyClassLoader$DefaultScopeParentClassLoader@24ef272d class org.springframework.boot.cli.compiler.ExtendedGroovyClassLoader$DefaultScopeParentClassLoader
    2018-09-26 09:34:19.140  INFO 13908 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
    2018-09-26 09:34:19.140  INFO 13908 --- [ost-startStop-1] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 4398 ms
    2018-09-26 09:34:19.303  INFO 13908 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean  : Servlet dispatcherServlet mapped to [/]
    2018-09-26 09:34:19.311  INFO 13908 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'characterEncodingFilter' to: [/*]
    2018-09-26 09:34:19.318  INFO 13908 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
    2018-09-26 09:34:19.320  INFO 13908 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'httpPutFormContentFilter' to: [/*]
    2018-09-26 09:34:19.322  INFO 13908 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'requestContextFilter' to: [/*]
    2018-09-26 09:34:19.556  INFO 13908 --- [       runner-0] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
    2018-09-26 09:34:19.831  INFO 13908 --- [       runner-0] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@2ec39a62: startup date [Wed Sep 26 09:34:14 CST 2018]; root of context hierarchy
    2018-09-26 09:34:19.998  INFO 13908 --- [       runner-0] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/]}" onto public java.lang.String Example.hello()
    2018-09-26 09:34:20.004  INFO 13908 --- [       runner-0] 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)
    2018-09-26 09:34:20.006  INFO 13908 --- [       runner-0] 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)
    2018-09-26 09:34:20.050  INFO 13908 --- [       runner-0] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
    2018-09-26 09:34:20.053  INFO 13908 --- [       runner-0] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
    2018-09-26 09:34:20.651  INFO 13908 --- [       runner-0] o.s.j.e.a.AnnotationMBeanExporter        : Registering beans for JMX exposure on startup
    2018-09-26 09:34:20.821  INFO 13908 --- [       runner-0] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path ''
    2018-09-26 09:34:20.830  INFO 13908 --- [       runner-0] o.s.boot.SpringApplication               : Started application in 9.092 seconds (JVM running for 15.353)
    
    Shell

    运行groovy文件,所需的依赖项将自动下载,它将在Tomcat 8080端口启动应用程序,如下面给出的屏幕截图所示 -
    Tomcat启动后,转到Web浏览器并点击URL => http://localhost:8080/

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  • 原文地址:https://www.cnblogs.com/borter/p/12418135.html
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