Develop Reference

Spring Accessing data with MySQL Won't Run

I'm new to using Spring, and I'm going through the accessing-data-with-MySQL tutorial here. I'm using Eclipse, and when I download all the code for the project, and then run the project as a Spring Boot App, I get the error:
APPLICATION FAILED TO START
Description:
Field userRepository in hello.MainController required a bean of type 'hello.UserRepository' that could not be found.
Action:
Consider defining a bean of type 'hello.UserRepository' in your configuration.
Again, this is the code directly from the tutorial. Anybody have any idea what's going on?
Thanks!
Full run log
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v1.5.6.RELEASE)
2017-08-26 21:58:28.365 INFO 2308 --- [ main] hello.Application : Starting Application on DESKTOP-F9F09K7 with PID 2308 (C:\Users\dylan\Desktop\gs-accessing-data-mysql-master\complete\target\classes started by dylan in C:\Users\dylan\Desktop\gs-accessing-data-mysql-master\complete)
2017-08-26 21:58:28.367 INFO 2308 --- [ main] hello.Application : No active profile set, falling back to default profiles: default
2017-08-26 21:58:28.411 INFO 2308 --- [ main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext#6b53e23f: startup date [Sat Aug 26 21:58:28 PDT 2017]; root of context hierarchy
2017-08-26 21:58:29.454 INFO 2308 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)
2017-08-26 21:58:29.465 INFO 2308 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2017-08-26 21:58:29.466 INFO 2308 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.16
2017-08-26 21:58:29.542 INFO 2308 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2017-08-26 21:58:29.542 INFO 2308 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1135 ms
2017-08-26 21:58:29.655 INFO 2308 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Mapping servlet: 'dispatcherServlet' to [/]
2017-08-26 21:58:29.659 INFO 2308 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*]
2017-08-26 21:58:29.667 INFO 2308 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2017-08-26 21:58:29.667 INFO 2308 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2017-08-26 21:58:29.667 INFO 2308 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*]
2017-08-26 21:58:29.701 WARN 2308 --- [ main] ationConfigEmbeddedWebApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'mainController': Unsatisfied dependency expressed through field 'userRepository'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'hello.UserRepository' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {#org.springframework.beans.factory.annotation.Autowired(required=true)}
2017-08-26 21:58:29.703 INFO 2308 --- [ main] o.apache.catalina.core.StandardService : Stopping service [Tomcat]
2017-08-26 21:58:29.721 INFO 2308 --- [ main] utoConfigurationReportLoggingInitializer :
Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2017-08-26 21:58:29.804 ERROR 2308 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter :
***************************
APPLICATION FAILED TO START
***************************
Description:
Field userRepository in hello.MainController required a bean of type 'hello.UserRepository' that could not be found.
Action:
Consider defining a bean of type 'hello.UserRepository' in your configuration.

I was able to fix this problem by clearing my maven cache. I did this by manually deleting my:
C:\Users\username\ .m2
folder and then doing a clean install. What the problem was, how it developed, and what changed to fix it I/we may never know. But, things seem to be working again.
Thanks to all who helped!

Have you registered a repository with type UserRepository? Check if you sign the repository with a #Repository annotation.

Download project from git gs-accessing-data-mysql-master
Extract the file to your disk
Open Eclipse
Click File > Import > Existing Maven Projects > Next
Click Browse and select the gs-accessing-data-mysql-master folder that is on your disk and Next
Select both pom.xml and Finish
Open gs-mysql-data project that has been imported
Right click on Application.java and run as Java Application or Spring Boot Application
Make sure that UserRepository interface extends from CrudRepository, like this:
package hello;
import org.springframework.data.repository.CrudRepository;
import hello.User;
// This will be AUTO IMPLEMENTED by Spring into a Bean called userRepository
// CRUD refers Create, Read, Update, Delete
public interface UserRepository extends CrudRepository<User, Long> {
}

spring boot related issues

Spring boot issues with following code. see error below and tomcat is running fine
package com.template;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#SpringBootApplication
public class SpringBootFreemarkerApplication {
public static void main(String[] args) {
SpringApplication.run(SpringBootFreemarkerApplication.class,
args);
}
}
package controller;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
#Controller
public class TestController {
#RequestMapping("/welcome")
public String hello(Model model, #RequestParam(value="name",
required=false, defaultValue="World") String name) {
model.addAttribute("name", name);
return "welcome";
}
}
"C:\Program Files\Java\jdk1.8.0_121\bin\java" "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2017.1.5\lib\idea_rt.jar=54267:C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2017.1.5\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\Java\jdk1.8.0_121\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_121\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.8.0_121\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.8.0_121\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0_121\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.8.0_121\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.8.0_121\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk1.8.0_121\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.8.0_121\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk1.8.0_121\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.8.0_121\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.8.0_121\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.8.0_121\jre\lib\ext\sunpkcs11.jar;C:\Program Files\Java\jdk1.8.0_121\jre\lib\ext\zipfs.jar;C:\Program Files\Java\jdk1.8.0_121\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.8.0_121\jre\lib\jce.jar;C:\Program Files\Java\jdk1.8.0_121\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.8.0_121\jre\lib\jfxswt.jar;C:\Program Files\Java\jdk1.8.0_121\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.8.0_121\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.8.0_121\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.8.0_121\jre\lib\resources.jar;C:\Program Files\Java\jdk1.8.0_121\jre\lib\rt.jar;C:\SpringBoot\Spring-boot-freemarker\target\classes;C:\Users\shekhar\.m2\repository\org\springframework\boot\spring-boot-starter-freemarker\1.5.6.RELEASE\spring-boot-starter-freemarker-1.5.6.RELEASE.jar;C:\Users\shekhar\.m2\repository\org\springframework\boot\spring-boot-starter\1.5.6.RELEASE\spring-boot-starter-1.5.6.RELEASE.jar;C:\Users\shekhar\.m2\repository\org\springframework\boot\spring-boot\1.5.6.RELEASE\spring-boot-1.5.6.RELEASE.jar;C:\Users\shekhar\.m2\repository\org\springframework\boot\spring-boot-autoconfigure\1.5.6.RELEASE\spring-boot-autoconfigure-1.5.6.RELEASE.jar;C:\Users\shekhar\.m2\repository\org\springframework\boot\spring-boot-starter-logging\1.5.6.RELEASE\spring-boot-starter-logging-1.5.6.RELEASE.jar;C:\Users\shekhar\.m2\repository\ch\qos\logback\logback-classic\1.1.11\logback-classic-1.1.11.jar;C:\Users\shekhar\.m2\repository\ch\qos\logback\logback-core\1.1.11\logback-core-1.1.11.jar;C:\Users\shekhar\.m2\repository\org\slf4j\jcl-over-slf4j\1.7.25\jcl-over-slf4j-1.7.25.jar;C:\Users\shekhar\.m2\repository\org\slf4j\jul-to-slf4j\1.7.25\jul-to-slf4j-1.7.25.jar;C:\Users\shekhar\.m2\repository\org\slf4j\log4j-over-slf4j\1.7.25\log4j-over-slf4j-1.7.25.jar;C:\Users\shekhar\.m2\repository\org\yaml\snakeyaml\1.17\snakeyaml-1.17.jar;C:\Users\shekhar\.m2\repository\org\freemarker\freemarker\2.3.26-incubating\freemarker-2.3.26-incubating.jar;C:\Users\shekhar\.m2\repository\org\springframework\spring-context-support\4.3.10.RELEASE\spring-context-support-4.3.10.RELEASE.jar;C:\Users\shekhar\.m2\repository\org\springframework\spring-beans\4.3.10.RELEASE\spring-beans-4.3.10.RELEASE.jar;C:\Users\shekhar\.m2\repository\org\springframework\spring-context\4.3.10.RELEASE\spring-context-4.3.10.RELEASE.jar;C:\Users\shekhar\.m2\repository\org\springframework\boot\spring-boot-starter-web\1.5.6.RELEASE\spring-boot-starter-web-1.5.6.RELEASE.jar;C:\Users\shekhar\.m2\repository\org\springframework\boot\spring-boot-starter-tomcat\1.5.6.RELEASE\spring-boot-starter-tomcat-1.5.6.RELEASE.jar;C:\Users\shekhar\.m2\repository\org\apache\tomcat\embed\tomcat-embed-core\8.5.16\tomcat-embed-core-8.5.16.jar;C:\Users\shekhar\.m2\repository\org\apache\tomcat\embed\tomcat-embed-el\8.5.16\tomcat-embed-el-8.5.16.jar;C:\Users\shekhar\.m2\repository\org\apache\tomcat\embed\tomcat-embed-websocket\8.5.16\tomcat-embed-websocket-8.5.16.jar;C:\Users\shekhar\.m2\repository\org\hibernate\hibernate-validator\5.3.5.Final\hibernate-validator-5.3.5.Final.jar;C:\Users\shekhar\.m2\repository\javax\validation\validation-api\1.1.0.Final\validation-api-1.1.0.Final.jar;C:\Users\shekhar\.m2\repository\org\jboss\logging\jboss-logging\3.3.1.Final\jboss-logging-3.3.1.Final.jar;C:\Users\shekhar\.m2\repository\com\fasterxml\classmate\1.3.3\classmate-1.3.3.jar;C:\Users\shekhar\.m2\repository\com\fasterxml\jackson\core\jackson-databind\2.8.9\jackson-databind-2.8.9.jar;C:\Users\shekhar\.m2\repository\com\fasterxml\jackson\core\jackson-annotations\2.8.0\jackson-annotations-2.8.0.jar;C:\Users\shekhar\.m2\repository\com\fasterxml\jackson\core\jackson-core\2.8.9\jackson-core-2.8.9.jar;C:\Users\shekhar\.m2\repository\org\springframework\spring-web\4.3.10.RELEASE\spring-web-4.3.10.RELEASE.jar;C:\Users\shekhar\.m2\repository\org\springframework\spring-aop\4.3.10.RELEASE\spring-aop-4.3.10.RELEASE.jar;C:\Users\shekhar\.m2\repository\org\springframework\spring-webmvc\4.3.10.RELEASE\spring-webmvc-4.3.10.RELEASE.jar;C:\Users\shekhar\.m2\repository\org\springframework\spring-expression\4.3.10.RELEASE\spring-expression-4.3.10.RELEASE.jar;C:\Users\shekhar\.m2\repository\org\slf4j\slf4j-api\1.7.25\slf4j-api-1.7.25.jar;C:\Users\shekhar\.m2\repository\org\springframework\spring-core\4.3.10.RELEASE\spring-core-4.3.10.RELEASE.jar" com.template.SpringBootFreemarkerApplication
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v1.5.6.RELEASE)
2017-07-30 15:20:08.005 INFO 7612 --- [ main] c.t.SpringBootFreemarkerApplication : Starting SpringBootFreemarkerApplication on DESKTOP-9LIAED5 with PID 7612 (C:\SpringBoot\Spring-boot-freemarker\target\classes started by shekhar in C:\SpringBoot\Spring-boot-freemarker)
2017-07-30 15:20:08.008 INFO 7612 --- [ main] c.t.SpringBootFreemarkerApplication : No active profile set, falling back to default profiles: default
2017-07-30 15:20:08.074 INFO 7612 --- [ main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext#3bd94634: startup date [Sun Jul 30 15:20:08 IST 2017]; root of context hierarchy
2017-07-30 15:20:10.322 INFO 7612 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)
2017-07-30 15:20:10.333 INFO 7612 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2017-07-30 15:20:10.334 INFO 7612 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.16
2017-07-30 15:20:10.472 INFO 7612 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2017-07-30 15:20:10.472 INFO 7612 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 2398 ms
2017-07-30 15:20:10.788 INFO 7612 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Mapping servlet: 'dispatcherServlet' to [/]
2017-07-30 15:20:10.792 INFO 7612 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*]
2017-07-30 15:20:10.792 INFO 7612 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2017-07-30 15:20:10.793 INFO 7612 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2017-07-30 15:20:10.793 INFO 7612 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*]
2017-07-30 15:20:11.221 INFO 7612 --- [ main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for #ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext#3bd94634: startup date [Sun Jul 30 15:20:08 IST 2017]; root of context hierarchy
2017-07-30 15:20:11.299 INFO 7612 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/welcome]}" onto public java.lang.String com.template.controller.TestController.hello(org.springframework.ui.Model,java.lang.String)
2017-07-30 15:20:11.302 INFO 7612 --- [ 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)
2017-07-30 15:20:11.302 INFO 7612 --- [ 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)
2017-07-30 15:20:11.337 INFO 7612 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017-07-30 15:20:11.337 INFO 7612 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017-07-30 15:20:11.374 INFO 7612 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017-07-30 15:20:11.626 INFO 7612 --- [ main] o.s.w.s.v.f.FreeMarkerConfigurer : ClassTemplateLoader for Spring macros added to FreeMarker configuration
2017-07-30 15:20:11.727 INFO 7612 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2017-07-30 15:20:11.790 INFO 7612 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080 (http)
2017-07-30 15:20:11.795 INFO 7612 --- [ main] c.t.SpringBootFreemarkerApplication : Started SpringBootFreemarkerApplication in 4.222 seconds (JVM running for 5.046)

Your controller is not scanned by the default component scan that Spring Boot provides. By default Spring boot starts from the package that contains the "main" class - the one annotated with #SpringBootApplication and also scans all of it's sub packages.
Your main class is in package com.template; but the controller is in package controller;. Move the controller in a package named package com.template.controller;

Since you are using FreeMarker Template with spring boot, I would suggest you to move your welcome.ftl template from this location src/webapp/welcome.ftl to this src/main/resources/templates/welcome.ftl and then restart your application and hit http://localhost:8080/welcome

Spring Boot Application is starting up from a JUnit test but unable to access through URL

I have a JUnit Test that starts my spring boot appcliation (Application.java).
#RunWith(SpringRunner.class)
#SpringBootTest(classes = Application.class)
public class AppclaitionTest {
#Test
public void contextLoads(){
Application.main(new String[]{});
}
}
If I run the JUnit test, Application is successfully starting up, but not accessible through url
Application Logs:
2017-06-16 12:18:07.918 INFO 207028 --- [ main] com.chandu.test.AppclaitionTest : Started AppclaitionTest in 1.927 seconds (JVM running for 2.458)
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v1.5.3.RELEASE)
2017-06-16 12:18:08.012 INFO 207028 --- [ main] com.test.app.Application : Starting Application on IVL-WS39 with PID 207028 (started by Bhanuchandar.Challa in D:\Jars\SpringJDBCMySQL)
2017-06-16 12:18:08.012 INFO 207028 --- [ main] com.test.app.Application : No active profile set, falling back to default profiles: default
2017-06-16 12:18:08.012 INFO 207028 --- [ main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext#3f1ddac2: startup date [Fri Jun 16 12:18:08 IST 2017]; root of context hierarchy
2017-06-16 12:18:08.402 INFO 207028 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)
2017-06-16 12:18:08.417 INFO 207028 --- [ main] o.apache.catalina.core.StandardService : Starting service Tomcat
2017-06-16 12:18:08.417 INFO 207028 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.14
2017-06-16 12:18:08.526 INFO 207028 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2017-06-16 12:18:08.526 INFO 207028 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 514 ms
2017-06-16 12:18:08.636 INFO 207028 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Mapping servlet: 'dispatcherServlet' to [/]
2017-06-16 12:18:08.636 INFO 207028 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*]
2017-06-16 12:18:08.636 INFO 207028 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2017-06-16 12:18:08.636 INFO 207028 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2017-06-16 12:18:08.636 INFO 207028 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*]
2017-06-16 12:18:08.933 INFO 207028 --- [ main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for #ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext#3f1ddac2: startup date [Fri Jun 16 12:18:08 IST 2017]; root of context hierarchy
2017-06-16 12:18:08.933 INFO 207028 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/getRowCount]}" onto public java.lang.Integer com.test.app.controller.TestController.getRowCount(java.lang.String)
2017-06-16 12:18:08.949 INFO 207028 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/process]}" onto public java.lang.String com.test.app.controller.TestController.processRequest()
2017-06-16 12:18:08.949 INFO 207028 --- [ 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)
2017-06-16 12:18:08.949 INFO 207028 --- [ 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)
2017-06-16 12:18:08.964 INFO 207028 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017-06-16 12:18:08.964 INFO 207028 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017-06-16 12:18:08.980 INFO 207028 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017-06-16 12:18:09.105 INFO 207028 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2017-06-16 12:18:09.151 INFO 207028 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080 (http)
2017-06-16 12:18:09.151 INFO 207028 --- [ main] com.test.app.Application : Started Application in 1.186 seconds (JVM running for 3.689)
When I tried to access the application through url 'http://localhost:8080/process', It says Site can't be reached.

Why would you do such thing? This should be a unit test and the flow of the test should be the following:
Start the application -> Call your controller endpoint -> assert that a specific text/element on that page is present -> Shut down the application.
Start the application : #RunWith(SpringRunner.class) doing this for you, no need to start is manually.
Shut down the application : At the end of your test class Spring boot does this for you (That's why you cant access your app in the browser)
For further help please see my answer here: How to test (rest) enpoints

By default, in #SpringBootTest annotation the field webEnvironment is set to WebEnvironment.MOCK
Therefore, Tomcat does not start.
You can set this field to WebEnvironment.DEFINED_PORT/RANDOM_PORT.
After this, Tomcat will be running.
#SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.DEFINED_PORT)
public class MyTestClass {
...
...
...
}

Spring Boot Getting Startet 404 error

I'm trying to use the spring framework for the first time. Unfortunately I'm getting 404-error when I call the URL of my webservice. Tomcat deployment of the war file is working (no errors in the logs).
When I execute the Example.java in eclipse everythings works fine.
Where is the mistake?
See my files/logs:
Example.java
import org.springframework.boot.*;
import org.springframework.boot.autoconfigure.*;
import org.springframework.stereotype.*;
import org.springframework.web.bind.annotation.*;
#Controller
#EnableAutoConfiguration
public class Example {
#RequestMapping("/")
#ResponseBody
String home() {
return "Hello World!";
}
public static void main(String[] args) throws Exception {
SpringApplication.run(Example.class, args);
}
}
build.gradle
buildscript {
repositories {
jcenter()
maven { url 'http://repo.spring.io/snapshot' }
maven { url 'http://repo.spring.io/milestone' }
}
dependencies {
classpath 'org.springframework.boot:spring-boot-gradle-plugin:2.0.0.BUILD-SNAPSHOT'
}
}
task wrapper(type: Wrapper) {
gradleVersion = '3.5'
}
apply plugin: 'java'
apply plugin: 'war'
apply plugin: 'org.springframework.boot'
apply plugin: 'io.spring.dependency-management'
jar {
baseName = 'myproject'
version = '0.0.1-SNAPSHOT'
}
repositories {
jcenter()
maven { url "http://repo.spring.io/snapshot" }
maven { url "http://repo.spring.io/milestone" }
}
dependencies {
//compile 'org.slf4j:slf4j-api:1.7.21'
compile("org.springframework.boot:spring-boot-starter-web")
testCompile("org.springframework.boot:spring-boot-starter-test")
//testCompile 'junit:junit:4.12'
}
log when starting the application inside eclipse
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.0.0.BUILD-SNAPSHOT)
2017-06-01 16:22:17.745 INFO 14940 --- [ main] Example : Starting Example on Laptop-Timo with PID 14940 (started by Timo in C:\Users\Timo\Documents\SE\Semester 4\LabSW\Webservice\TimeShoppingService)
2017-06-01 16:22:17.745 INFO 14940 --- [ main] Example : No active profile set, falling back to default profiles: default
2017-06-01 16:22:17.815 INFO 14940 --- [ main] ConfigServletWebServerApplicationContext : Refreshing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext#6a01e23: startup date [Thu Jun 01 16:22:17 CEST 2017]; root of context hierarchy
2017-06-01 16:22:20.098 INFO 14940 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2017-06-01 16:22:20.116 INFO 14940 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2017-06-01 16:22:20.116 INFO 14940 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.15
2017-06-01 16:22:20.264 INFO 14940 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2017-06-01 16:22:20.264 INFO 14940 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 2449 ms
2017-06-01 16:22:20.626 INFO 14940 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Mapping servlet: 'dispatcherServlet' to [/]
2017-06-01 16:22:20.638 INFO 14940 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*]
2017-06-01 16:22:20.639 INFO 14940 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2017-06-01 16:22:20.639 INFO 14940 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2017-06-01 16:22:20.640 INFO 14940 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*]
2017-06-01 16:22:21.343 INFO 14940 --- [ main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for #ControllerAdvice: org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext#6a01e23: startup date [Thu Jun 01 16:22:17 CEST 2017]; root of context hierarchy
2017-06-01 16:22:21.442 INFO 14940 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/]}" onto java.lang.String Example.home()
2017-06-01 16:22:21.456 INFO 14940 --- [ 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)
2017-06-01 16:22:21.457 INFO 14940 --- [ 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)
2017-06-01 16:22:21.548 INFO 14940 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017-06-01 16:22:21.549 INFO 14940 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017-06-01 16:22:21.683 INFO 14940 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017-06-01 16:22:21.940 INFO 14940 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2017-06-01 16:22:22.018 INFO 14940 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http)
2017-06-01 16:22:22.024 INFO 14940 --- [ main] Example : Started Example in 4.81 seconds (JVM running for 5.487)
2017-06-01 16:22:32.727 INFO 14940 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring FrameworkServlet 'dispatcherServlet'
2017-06-01 16:22:32.727 INFO 14940 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : FrameworkServlet 'dispatcherServlet': initialization started
2017-06-01 16:22:32.755 INFO 14940 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : FrameworkServlet 'dispatcherServlet': initialization completed in 28 ms

Use #RestController instead of #Controller and just give request like
localhost:8080/

In order to deploy a spring-boot application to an external servlet container you need to extend SpringBootServletInitializer.
The main method is only executed when the application is run standalone.
It is recommended to run spring-boot apps standalone rather than via an external servlet container, but it is possible to support both methods simultaneously.
See the spring documentation for more information.

By Default context path of Spring boot application is '/'. So in your case url to access home resource will be http://localhost:8080/
For custom context path add an application.properties file to src\main\resources. In that properties file, add 2 properties:
server.contextPath=/Service
server.port=12378
You may refer this link for example.

Maybe url mistake. try it like the url below .
http://localhost:8080/Service/

You have not mapped your controller or method with any specific string.
#Controller
#EnableAutoConfiguration
public class Example {
#RequestMapping("/")
#ResponseBody
String home() {
return "Hello World!";
}
...
You have used #RequestMapping("/") which maps the home() method so you need to use localhost:8080/ url instead of localhost:8080/service
and if you want to use the service in url just change mapping to #RequestMapping("/service").

The easiest way out is just by replacing the annotation above the class respectively. And use the #RestController, then you move the #RequestMapping("/") above the class, Beneath the rest controller. Go to the Postman and call it with localhost:8080/ and that's all

When Is My Business Code Actually Being Executed?

I got a Spring Boot app. It's running as such:
#SpringBootApplication
public class MyBooty implements CommandLineRunner {
public static void main(String[] args) {
SpringApplication.run(MyBooty.class, args);
}
public void run(String... args) throws Exception {
SomeClass someClass = new SomeClass(...);
someClass.doStuff();
System.out.println("Why Am I appearing Before \"Started In\" log line?");
}
Does what I need. But I noticed this line in the output: Started MyBooty in 17.594 seconds (JVM running for 18.206), which was printed after some of my console output.
This made me think my code was actually executing before the app was actually initialized. So I did some research found this blog post and then set up a new class as such:
#Component
public class ApplicationStartup implements ApplicationListener<ApplicationReadyEvent>{
public void onApplicationEvent(ApplicationReadyEvent event) {
SomeClass someClass = new SomeClass(...);
SomeClass.doStuff();
return;
}
}
Which supposedly executes after after application startup. Well, I still see the Started app in... output after my output again.
So, concept check. Are things working as intended and I'm just being naive? Or is there maybe something missing? If someone could knowledge share on the topic that would be appreciated.
Again, my code runs and does exactly what I need it to, but I just want to make sure I'm using/taking advantage of Spring Boot properly.
In case it's unclear what I'm asking, I'm asking Why does the "Started App in X seconds" message appear after my output? I ask this because I simply found it confusing that it said the app was started after my business code had ALREADY ran. This question is a conceptual question about how spring boot starts up.
Edit: Console Output
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v1.3.2.RELEASE)
2016-09-23 17:44:56.598 INFO 1004 --- [ main] o.b.p.MyBooty : Starting MyBooty on ********* with PID **** (C:\...\MyBooty)
:
:
:
2016-09-23 17:44:59.152 INFO 1004 --- [ main] o.apache.catalina.core.StandardService : Starting service Tomcat
2016-09-23 17:44:59.154 INFO 1004 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.0.30
2016-09-23 17:44:59.725 INFO 1004 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2016-09-23 17:44:59.725 INFO 1004 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 3074 ms
2016-09-23 17:45:00.228 INFO 1004 --- [ost-startStop-1] o.s.b.c.e.ServletRegistrationBean : Mapping servlet: 'dispatcherServlet' to [/]
2016-09-23 17:45:00.234 INFO 1004 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*]
2016-09-23 17:45:00.234 INFO 1004 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2016-09-23 17:45:00.234 INFO 1004 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2016-09-23 17:45:00.234 INFO 1004 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*]
2016-09-23 17:45:00.824 INFO 1004 --- [ main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for #ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext#453da22c: startup date [Fri Sep 23 17:44:56 CDT 2016]; root of context hierarchy
2016-09-23 17:45:00.901 INFO 1004 --- [ 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)
2016-09-23 17:45:00.902 INFO 1004 --- [ 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)
2016-09-23 17:45:00.925 INFO 1004 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2016-09-23 17:45:00.925 INFO 1004 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2016-09-23 17:45:00.962 INFO 1004 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2016-09-23 17:45:01.136 INFO 1004 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2016-09-23 17:45:01.215 INFO 1004 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080 (http)
Why Am I appearing Before "Started In" log line?
2016-09-23 17:45:17.063 INFO 1004 --- [ main] o.b.p.MyBooty : Started MyBooty in 20.814 seconds (JVM running for 23.279) <----- Why is this after my output?
2016-09-23 17:45:22.675 INFO 1004 --- [)-10.168.50.106] inMXBeanRegistrar$SpringApplicationAdmin : Application shutdown requested.
2016-09-23 17:45:22.676 INFO 1004 --- [)-10.168.50.106] ationConfigEmbeddedWebApplicationContext : Closing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext#453da22c: startup date [Fri Sep 23 17:44:56 CDT 2016]; root of context hierarchy
2016-09-23 17:45:22.678 INFO 1004 --- [)-10.168.50.106] o.s.j.e.a.AnnotationMBeanExporter : Unregistering JMX-exposed beans on shutdown

You class is annotated with #SpringBootApplication, which makes it automatically register as a Spring Bean.
The SpringApplication run(Object source, String... args) method you are calling ends up calling run(String... args).
The run() method calls the afterRefresh() method right before it logs the "Started ..." message, and afterRefresh() will call the run() method of any registered ApplicationRunner and CommandLineRunner beans.
Or, as the documentation says it:
If you need to run some specific code once the SpringApplication has started, you can implement the ApplicationRunner or CommandLineRunner interfaces. Both interfaces work in the same way and offer a single run method which will be called just before SpringApplication.run(…​) completes.