Spring-Boot：如何使用SBT构建可运行的jar？

Question

如何使用SBT构建可运行的jar？ 也许Spring-Boot不适合SBT构建的应用程序？对此有何建议？

我尝试使用sbt-assembly但是当我尝试运行它时失败了。 请注意sbt run有效

mainClass in assembly := Some("com.xagongroup.xagon.app.XagonETL")

assemblyMergeStrategy in assembly := {
  case PathList("META-INF", _ @ _*) => MergeStrategy.discard
  case _ => MergeStrategy.first
}

堆栈跟踪

org.springframework.beans.factory.BeanDefinitionStoreException: Failed to process import candidates for configuration class [com.x.app.XETL]; nested exception is java.lang.Ille
galArgumentException: No auto configuration classes found in META-INF/spring.factories. If you are using a custom packaging, make sure that file is correct.
        at org.springframework.context.annotation.ConfigurationClassParser.processDeferredImportSelectors(ConfigurationClassParser.java:556)
        at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:185)
        at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:308)
        at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:228)
        at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:270)
        at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:93)
        at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:687)
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:525)
        at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122)
        at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693)
        at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:303)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1118)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107)
        at com.x.app.XETL$.main(XETL.scala:21)
        at com.x.app.XETL.main(XETL.scala)
Caused by: java.lang.IllegalArgumentException: No auto configuration classes found in META-INF/spring.factories. If you are using a custom packaging, make sure that file is correct.
        at org.springframework.util.Assert.notEmpty(Assert.java:277)
        at org.springframework.boot.autoconfigure.AutoConfigurationImportSelector.getCandidateConfigurations(AutoConfigurationImportSelector.java:153)
        at org.springframework.boot.autoconfigure.AutoConfigurationImportSelector.selectImports(AutoConfigurationImportSelector.java:95)
        at org.springframework.context.annotation.ConfigurationClassParser.processDeferredImportSelectors(ConfigurationClassParser.java:547)
        ... 15 common frames omitted

Answer 1

我通过转移到sbt-native-packager

解决了这个问题

plugins.sbt

addSbtPlugin("com.typesafe.sbt" % "sbt-native-packager" % "1.2.0")

build.sbt

scriptClasspath := Seq("*")
mainClass in Compile := Some("com.x.app.XETL")
enablePlugins(JavaAppPackaging)

运行：

1. 包装 sbt universal:stage
2. 启动应用： target\universal\stage\bin\x.bat

Answer 2

我已经解决了这个问题，没有任何插件。似乎唯一的技巧是不丢弃build.sbt中的META-INF / spring.factories文件

assemblyMergeStrategy in assembly := {
   case PathList("META-INF", "spring.factories") => MergeStrategy.filterDistinctLines
   case PathList("META-INF", _*) => MergeStrategy.discard
   case _ => MergeStrategy.first
}