Trouble getting started with SpringBoot and Gradle - gradle

Question

I am a new to Java, Gradle and Spring.
I setup a new project with the following gradle script:
buildscript {
repositories {
maven { url "http://repo.spring.io/snapshot" }
maven { url "http://repo.spring.io/milestone" }
}
dependencies {
classpath("org.springframework.boot:spring-boot-gradle-plugin:1.3.0.BUILD-SNAPSHOT")
}
}
apply plugin: 'java'
apply plugin: 'spring-boot'
repositories {
maven { url "http://repo.spring.io/snapshot" }
maven { url "http://repo.spring.io/milestone" }
}
dependencies {
compile("org.springframework.boot:spring-boot-starter-web")
testCompile("org.springframework.boot:spring-boot-starter-test")
}
When trying to build with the above script, I get the following errors:
E:\Projects\SpringAppTutorial>gradlew
FAILURE: Build failed with an exception.
* What went wrong:
A problem occurred configuring root project 'SpringAppTutorial'.
> Could not resolve all dependencies for configuration ':classpath'.
> Could not resolve org.springframework.boot:spring-boot-gradle-plugin:1.3.0.BUILD-SNAPSHOT.
Required by:
:SpringAppTutorial:unspecified
> Could not resolve org.springframework.boot:spring-boot-gradle-plugin:1.3.0.BUILD-SNAPSHOT.
> Could not parse POM http://repo.spring.io/snapshot/org/springframework/boot/spring-boot-gradle-plugin/1.3.0.BUILD-SNAPSHOT/spring-boot-gradle-plugin-1.3.0.BUILD-20150531.081700-179.pom
> Could not resolve org.springframework.boot:spring-boot-tools:1.3.0.BUILD-SNAPSHOT.
> Could not resolve org.springframework.boot:spring-boot-tools:1.3.0.BUILD-SNAPSHOT.
> Could not parse POM http://repo.spring.io/snapshot/org/springframework/boot/spring-boot-tools/1.3.0.BUILD-SNAPSHOT/spring-boot-tools-1.3.0.BUILD-20150531.081700-180.pom
> Could not resolve org.springframework.boot:spring-boot-parent:1.3.0.BUILD-SNAPSHOT.
> Could not resolve org.springframework.boot:spring-boot-parent:1.3.0.BUILD-SNAPSHOT.
> Could not parse POM http://repo.spring.io/snapshot/org/springframework/boot/spring-boot-parent/1.3.0.BUILD-SNAPSHOT/spring-boot-parent-1.3.0.BUILD-20150531.081700-180.pom
> Could not resolve org.springframework.boot:spring-boot-dependencies:1.3.0.BUILD-SNAPSHOT.
> Could not resolve org.springframework.boot:spring-boot-dependencies:1.3.0.BUILD-SNAPSHOT.
> Could not parse POM http://repo.spring.io/snapshot/org/springframework/boot/spring-boot-dependencies/1.3.0.BUILD-SNAPSHOT/spring-boot-dependencies-1.3.0.BUILD-20150531.081700-181.pom
> Could not find org.springframework.data:spring-data-releasetrain:Fowler-RELEASE.
Searched in the following locations:
http://repo.spring.io/snapshot/org/springframework/data/spring-data-releasetrain/Fowler-RELEASE/spring-data-releasetrain-Fowler-RELEASE.pom
http://repo.spring.io/snapshot/org/springframework/data/spring-data-releasetrain/Fowler-RELEASE/spring-data-releasetrain-Fowler-RELEASE.jar
http://repo.spring.io/milestone/org/springframework/data/spring-data-releasetrain/Fowler-RELEASE/spring-data-releasetrain-Fowler-RELEASE.pom
http://repo.spring.io/milestone/org/springframework/data/spring-data-releasetrain/Fowler-RELEASE/spring-data-releasetrain-Fowler-RELEASE.jar
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
BUILD FAILED
Total time: 15.726 secs
E:\Projects\SpringAppTutorial>
What am I doing wrong here?

Answer 1

You should be using a release version of the spring-boot gradle plugin - your script is using a development snapshot version string of some kind.
i.e. try
dependencies {
classpath("org.springframework.boot:spring-boot-gradle-plugin:1.2.3.RELEASE")
}
(from http://docs.spring.io/spring-boot/docs/current/reference/html/build-tool-plugins-gradle-plugin.html)
Assuming that works, you should be able to get rid of this section also:
repositories {
maven { url "http://repo.spring.io/snapshot" }
maven { url "http://repo.spring.io/milestone" }
}

Answer 2

I have faced the same problem and as #skaffman suggests, I added version to my dependencies, it resolved.
implementation('org.springframework.session:spring-session:1.3.4.RELEASE')
runtimeOnly('com.okta.spring:okta-spring-boot-starter:0.6.1')
runtimeOnly('org.springframework.security.oauth:spring-security-oauth2:2.3.4.RELEASE')