Spring Boot Kotlin project with a REST Webservice and Spring Data
Home Page: https://spring.io/blog/2016/02/15/developing-spring-boot-applications-with-kotlin
This is the source code for a sample Spring Boot application developed with Kotlin and Spring Data JPA.
See also https://github.com/spring-guides/tut-spring-boot-kotlin for a more complete Spring Boot + Kotlin + JPA example.
You can launch the application with by running:
$ ./gradlew bootRun
And request http://localhost:8080/customers.
This project uses a Gradle Kotlin DSL.
This project is Apache 2.0 licensed.
and how about findByLastName fun works?
Best wishes
ChenKan
I can't find the config file for datasource's properties?
Best wishes!
Maybe i'm missing something, but I get the following error when trying to build.
FAILURE: Build failed with an exception.
* Where:
Build file '/home/toilal/idea-projects/spring-boot-kotlin-demo/build.gradle.kts' line: 2
* What went wrong:
Plugin [id: 'org.springframework.boot', version: '2.0.0.M5', artifact: 'org.springframework.boot:spring-boot-gradle-plugin:2.0.0.M5'] was not found in any of the following sources:
- Gradle Core Plugins (plugin is not in 'org.gradle' namespace)
- Gradle Central Plugin Repository (plugin 'org.springframework.boot' has no version '2.0.0.M5' - see https://plugins.gradle.org/plugin/org.springframework.boot for available versions)
- maven(https://jcenter.bintray.com/) (Could not resolve plugin artifact 'org.springframework.boot:spring-boot-gradle-plugin:2.0.0.M5')
- maven(https://repo.spring.io/milestone) (Could not resolve plugin artifact 'org.springframework.boot:spring-boot-gradle-plugin:2.0.0.M5')
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
* Get more help at https://help.gradle.org
BUILD FAILED in 4s```
Thanks for this, and the great talk at https://www.infoq.com/presentations/servlet-reactive-stack
Minor suggestion. I used this as the starting point to experiment a little with Spring 2.0 and Kotlin, and was stuck for a bit trying to get anything from resources/static to load since "/" was already mapped to CustomerController. It might be helpful to update the routes in CustomerController as...
@RestController
class CustomerController(private val repository: CustomerRepository) {
@GetMapping("/customers")
fun findAll() = repository.findAll()
@GetMapping("/customers/{lastName}")
fun findByLastName(@PathVariable lastName:String)
= repository.findByLastName(lastName)
}
Thanks again...
hi , Could you tell me how to solve this
FAILURE: Build failed with an exception.
* Where:
Build file '/home/lab/spring-boot-kotlin-demo/build.gradle.kts' line: 3
* What went wrong:
Plugin [id: 'org.springframework.boot', version: '2.1.2.RELEASE'] was not found in any of the following sources:
- Gradle Core Plugins (plugin is not in 'org.gradle' namespace)
- Plugin Repositories (could not resolve plugin artifact 'org.springframework.boot:org.springframework.boot.gradle.plugin:2.1.2.RELEASE')
Searched in the following repositories:
Gradle Central Plugin Repository
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Get more help at https://help.gradle.org
CONFIGURE FAILED in 9s
➜ java -version
java version "1.8.0_211"
Java(TM) SE Runtime Environment (build 1.8.0_211-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.211-b12, mixed mode)
downloaded project, did gradle bootRun and got this:
Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2017-10-20 13:21:11.329 ERROR 6929 --- [ main] o.s.boot.SpringApplication : Application startup failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: javax/xml/bind/JAXBException
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1704) ~[spring-beans-5.0.0.RELEASE.jar:5.0.0.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:583) ~[spring-beans-5.0.0.RELEASE.jar:5.0.0.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:502) ~[spring-beans-5.0.0.RELEASE.jar:5.0.0.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:312) ~[spring-beans-5.0.0.RELEASE.jar:5.0.0.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) ~[spring-beans-5.0.0.RELEASE.jar:5.0.0.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:310) ~[spring-beans-5.0.0.RELEASE.jar:5.0.0.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) ~[spring-beans-5.0.0.RELEASE.jar:5.0.0.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1083) ~[spring-context-5.0.0.RELEASE.jar:5.0.0.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:858) ~[spring-context-5.0.0.RELEASE.jar:5.0.0.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) ~[spring-context-5.0.0.RELEASE.jar:5.0.0.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:122) ~[spring-boot-2.0.0.M5.jar:2.0.0.M5]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:750) [spring-boot-2.0.0.M5.jar:2.0.0.M5]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:386) [spring-boot-2.0.0.M5.jar:2.0.0.M5]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:327) [spring-boot-2.0.0.M5.jar:2.0.0.M5]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1245) [spring-boot-2.0.0.M5.jar:2.0.0.M5]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1233) [spring-boot-2.0.0.M5.jar:2.0.0.M5]
at hello.ApplicationKt.main(Application.kt:52) [main/:na]
Caused by: java.lang.NoClassDefFoundError: javax/xml/bind/JAXBException
at org.hibernate.boot.spi.XmlMappingBinderAccess.<init>(XmlMappingBinderAccess.java:43) ~[hibernate-core-5.2.11.Final.jar:5.2.11.Final]
at org.hibernate.boot.MetadataSources.<init>(MetadataSources.java:87) ~[hibernate-core-5.2.11.Final.jar:5.2.11.Final]
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.<init>(EntityManagerFactoryBuilderImpl.java:208) ~[hibernate-core-5.2.11.Final.jar:5.2.11.Final]
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.<init>(EntityManagerFactoryBuilderImpl.java:163) ~[hibernate-core-5.2.11.Final.jar:5.2.11.Final]
at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:51) ~[spring-orm-5.0.0.RELEASE.jar:5.0.0.RELEASE]
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:358) ~[spring-orm-5.0.0.RELEASE.jar:5.0.0.RELEASE]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:384) ~[spring-orm-5.0.0.RELEASE.jar:5.0.0.RELEASE]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:373) ~[spring-orm-5.0.0.RELEASE.jar:5.0.0.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1763) ~[spring-beans-5.0.0.RELEASE.jar:5.0.0.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1700) ~[spring-beans-5.0.0.RELEASE.jar:5.0.0.RELEASE]
... 16 common frames omitted
Caused by: java.lang.ClassNotFoundException: javax.xml.bind.JAXBException
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:582) ~[na:na]
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:185) ~[na:na]
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:496) ~[na:na]
... 26 common frames omitted
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':bootRun'.
> Process 'command '/usr/lib/jvm/java-9-oracle/bin/java'' finished with non-zero exit value 1
Compiling and running the demo with Java 8 is fine, but as soon as Java 9 I encounter the following error:
./gradlew bootRun
> Configure project :
e: Supertypes of the following classes cannot be resolved. Please make sure you have the required dependencies in the classpath:
class org.gradle.api.Project, unresolved supertypes: Comparable<Project>
class org.gradle.api.plugins.ExtensionAware, unresolved supertypes: Object
class org.gradle.api.plugins.PluginAware, unresolved supertypes: Object
class groovy.lang.Closure, unresolved supertypes: Cloneable, Runnable, Serializable
class groovy.lang.GroovyObjectSupport, unresolved supertypes: Object
class groovy.lang.GroovyObject, unresolved supertypes: Object
class groovy.lang.GroovyCallable, unresolved supertypes: Callable<V>
class org.gradle.api.Action, unresolved supertypes: Object
class org.gradle.api.NamedDomainObjectFactory, unresolved supertypes: Object
class org.gradle.api.initialization.dsl.ScriptHandler, unresolved supertypes: Object
class org.gradle.api.NamedDomainObjectList, unresolved supertypes: List<T>
class org.gradle.api.DomainObjectCollection, unresolved supertypes: Collection<T>
class org.gradle.util.Configurable, unresolved supertypes: Object
class org.gradle.api.artifacts.dsl.DependencyHandler, unresolved supertypes: Object
FAILURE: Build failed with an exception.
* What went wrong:
A problem occurred configuring root project 'spring-boot-kotlin-demo'.
> Could not open cache directory 7ooj87our40tvw5ni3o9390ur (/Users/niko/.gradle/caches/4.2/gradle-kotlin-dsl/7ooj87our40tvw5ni3o9390ur).
> Internal error: unable to compile script, see log for details
my environment looks like:
./gradlew --version
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.codehaus.groovy.reflection.CachedClass (file:/Users/niko/.gradle/wrapper/dists/gradle-4.2-bin/cl9xe1l8k8ophj72k8rv6xbu7/gradle-4.2/lib/groovy-all-2.4.11.jar) to method java.lang.Object.finalize()
WARNING: Please consider reporting this to the maintainers of org.codehaus.groovy.reflection.CachedClass
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
------------------------------------------------------------
Gradle 4.2
------------------------------------------------------------
Build time: 2017-09-20 14:48:23 UTC
Revision: 5ba503cc17748671c83ce35d7da1cffd6e24dfbd
Groovy: 2.4.11
Ant: Apache Ant(TM) version 1.9.6 compiled on June 29 2015
JVM: 9 (Oracle Corporation 9+181)
OS: Mac OS X 10.11.6 x86_64
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