john-deng / spring-boot-test1

spring boot test

#spring-boot-test1

Description: The test code for spring boot

#usage git clone https://github.com/john-deng/spring-boot-test1.git Open spring-boot-test1 from IDEA IDE, then run Application.java, you should be able to see below messages.

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

2016-01-09 16:15:26.561  INFO 10574 --- [           main] cn.vpclub.Application                    : Starting Application on Johns-MacBook-Pro.local with PID 10574 (/Users/johnd/workspace/test/spring-boot-test1/target/classes started by johnd in /Users/johnd/workspace/test)
2016-01-09 16:15:26.565  INFO 10574 --- [           main] cn.vpclub.Application                    : No active profile set, falling back to default profiles: default
2016-01-09 16:15:26.637  INFO 10574 --- [           main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@7ba18f1b: startup date [Sat Jan 09 16:15:26 CST 2016]; root of context hierarchy
2016-01-09 16:15:27.688  INFO 10574 --- [           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]]
2016-01-09 16:15:28.292  INFO 10574 --- [           main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)
2016-01-09 16:15:28.303  INFO 10574 --- [           main] o.apache.catalina.core.StandardService   : Starting service Tomcat
2016-01-09 16:15:28.304  INFO 10574 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet Engine: Apache Tomcat/8.0.30
2016-01-09 16:15:28.397  INFO 10574 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2016-01-09 16:15:28.397  INFO 10574 --- [ost-startStop-1] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 1764 ms
2016-01-09 16:15:28.695  INFO 10574 --- [ost-startStop-1] o.s.b.c.e.ServletRegistrationBean        : Mapping servlet: 'dispatcherServlet' to [/]
2016-01-09 16:15:28.699  INFO 10574 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean  : Mapping filter: 'characterEncodingFilter' to: [/*]
2016-01-09 16:15:28.700  INFO 10574 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean  : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2016-01-09 16:15:28.700  INFO 10574 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean  : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2016-01-09 16:15:28.700  INFO 10574 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean  : Mapping filter: 'requestContextFilter' to: [/*]
2016-01-09 16:15:28.954  INFO 10574 --- [           main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@7ba18f1b: startup date [Sat Jan 09 16:15:26 CST 2016]; root of context hierarchy
2016-01-09 16:15:29.019  INFO 10574 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/user],methods=[GET],produces=[application/json]}" onto public cn.vpclub.User cn.vpclub.Controller.index(int,java.lang.String)
2016-01-09 16:15:29.021  INFO 10574 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/]}" onto public java.lang.String cn.vpclub.Controller.home()
2016-01-09 16:15:29.023  INFO 10574 --- [           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)
2016-01-09 16:15:29.023  INFO 10574 --- [           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)
2016-01-09 16:15:29.048  INFO 10574 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2016-01-09 16:15:29.048  INFO 10574 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2016-01-09 16:15:29.085  INFO 10574 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2016-01-09 16:15:29.211  INFO 10574 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Registering beans for JMX exposure on startup
2016-01-09 16:15:29.294  INFO 10574 --- [           main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080 (http)
2016-01-09 16:15:29.301  INFO 10574 --- [           main] cn.vpclub.Application                    : Started Application in 3.322 seconds (JVM running for 4.109)

Now, let's learn the spring dependency injection step by step:

1. First checkout the source code
    
    git checkout 4c9a36b52c31f165ef2bb192c8bada1e268f5dda

    In this reversion, it demostrating how the primary instantation works, this is not recomanded as the class Controller 
    depends on MockMailSender, once MockMailSender is changed, the Controller needs to be changed as well, imaging the
    project contains hundreds and thousands of classes, it will be disaster.
    
    In Controller.java

    private MailSender mailSender = new MockMailSender(); 

2. Let's checkout another reversion, see how spring dependecy injection works.
    
    git checkout a77572c413377aa4f10098b7be916df1ed8ecfb4
    
    Above of the class MockMailSender in MockMailSender.java, add a spring annotation @Component
    
    @Component
    public class MockMailSender implements MailSender {
    
    Above of the instantation in Controller.java, add @Resource
    
    @RestController
    public class Controller {
    
        @Resource
        private MailSender mailSender;
    
        ...
    }

Testing APIs

After stated the application, use curl to check the below APIs,

curl "http://localhost:8080/user?id=3&name=John%20Deng"

    {"name":"John Deng","id":3}

curl "http://localhost:8080/[email protected]&subject=About%20spring%20tutorial&body=Hi%20All,%20let%27s%20have%20a%20training"

    Mail is sent to [email protected] successfully!