Question

我正在使用Gradle构建并将一个非常简单的spring boot应用程序（99％静态内容）打包到带有嵌入式tomcat的jar中。

我尝试创建所述jar，起初结果是86k并且没有启动，因为它缺少一些Spring启动类。我总结说这个jar我没有包含任何应用程序的依赖，因为我确实想要一个完全独立的jar，我应该做更多的研究。

这时我发现了将from {configurations.compile.collect { it.isDirectory() ? it : zipTree(it) }部分添加到＆＃39; jar＆＃39;这导致它引入所有依赖项。（我希望）。我熟悉三元运算符的概念，我可以看到它在这里尝试做什么。

不幸的是它还没有用！这是我在启动时遇到的错误，下面是我的build.gradle。

我想要一个完全包含在jar中的嵌入式tomcat的spring boot应用程序。我在做一些非常规的事吗？在这一点上任何帮助将不胜感激。

(About 80 lines of successful Spring Boot launch messages followed immediately by:
18:16:54.890 [main] WARN  o.s.b.c.e.AnnotationConfigEmbeddedWebApplicationContext - Exception encountered during context initialization - cancelling refresh attempt
org.springframework.context.ApplicationContextException: Unable to start embedded container; nested exception is org.springframework.context.ApplicationContextException: Unable to start EmbeddedWebApplicationContext due to missing EmbeddedServletContainerFactory bean.
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:132) [SpringWsTest1.jar:na]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:474) ~[SpringWsTest1.jar:na]
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:117) [SpringWsTest1.jar:na]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:689) [SpringWsTest1.jar:na]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:321) [SpringWsTest1.jar:na]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:969) [SpringWsTest1.jar:na]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:958) [SpringWsTest1.jar:na]
    at ws.Application.main(Application.java:11) [SpringWsTest1.jar:na]
Caused by: org.springframework.context.ApplicationContextException: Unable to start EmbeddedWebApplicationContext due to missing EmbeddedServletContainerFactory bean.
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.getEmbeddedServletContainerFactory(EmbeddedWebApplicationContext.java:182) [SpringWsTest1.jar:na]
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.createEmbeddedServletContainer(EmbeddedWebApplicationContext.java:155) [SpringWsTest1.jar:na]
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:129) [SpringWsTest1.jar:na]
    ... 7 common frames omitted
18:16:54.891 [main] DEBUG o.s.b.f.s.DefaultListableBeanFactory - Destroying singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@3b084709: defining beans [org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,application,org.springframework.context.annotation.ConfigurationClassPostProcessor.importAwareProcessor,org.springframework.context.annotation.ConfigurationClassPostProcessor.enhancedConfigurationProcessor,demoController,greetingController,org.springframework.boot.autoconfigure.AutoConfigurationPackages]; root of factory hierarchy
18:16:54.891 [main] ERROR o.s.boot.SpringApplication - Application startup failed
org.springframework.context.ApplicationContextException: Unable to start embedded container; nested exception is org.springframework.context.ApplicationContextException: Unable to start EmbeddedWebApplicationContext due to missing EmbeddedServletContainerFactory bean.
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:132) ~[SpringWsTest1.jar:na]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:474) ~[SpringWsTest1.jar:na]
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:117) ~[SpringWsTest1.jar:na]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:689) [SpringWsTest1.jar:na]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:321) [SpringWsTest1.jar:na]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:969) [SpringWsTest1.jar:na]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:958) [SpringWsTest1.jar:na]
    at ws.Application.main(Application.java:11) [SpringWsTest1.jar:na]
Caused by: org.springframework.context.ApplicationContextException: Unable to start EmbeddedWebApplicationContext due to missing EmbeddedServletContainerFactory bean.
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.getEmbeddedServletContainerFactory(EmbeddedWebApplicationContext.java:182) ~[SpringWsTest1.jar:na]
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.createEmbeddedServletContainer(EmbeddedWebApplicationContext.java:155) ~[SpringWsTest1.jar:na]
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:129) ~[SpringWsTest1.jar:na]
    ... 7 common frames omitted
Exception in thread "main" org.springframework.context.ApplicationContextException: Unable to start embedded container; nested exception is org.springframework.context.ApplicationContextException: Unable to start EmbeddedWebApplicationContext due to missing EmbeddedServletContainerFactory bean.
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:132)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:474)
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:117)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:689)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:321)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:969)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:958)
    at ws.Application.main(Application.java:11)
Caused by: org.springframework.context.ApplicationContextException: Unable to start EmbeddedWebApplicationContext due to missing EmbeddedServletContainerFactory bean.
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.getEmbeddedServletContainerFactory(EmbeddedWebApplicationContext.java:182)
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.createEmbeddedServletContainer(EmbeddedWebApplicationContext.java:155)
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:129)
    ... 7 more

build.gradle我正在使用：

println System.getProperty("java.home")

buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath("org.springframework.boot:spring-boot-gradle-plugin:1.2.7.RELEASE")
    }
}

apply plugin: 'java'
apply plugin: 'eclipse'
apply plugin: 'idea'
apply plugin: 'spring-boot'


jar {
    manifest {
        attributes 'Main-Class': 'ws.Application'
    }

    from {
        configurations.compile.collect { it.isDirectory() ? it : zipTree(it) }
    }
}


repositories {
    mavenCentral()
}


dependencies {
    compile("org.springframework.boot:spring-boot-starter-web")
    testCompile("junit:junit")
}

task wrapper(type: Wrapper) {
    gradleVersion = '2.3'
}

sourceCompatibility = 1.8
targetCompatibility = 1.8

Answer 1

由于您使用的是gradle spring boot插件，因此您无需为构建spring-boot应用程序的fat-jar工件制作额外的gradle配置。它已经有一个任务bootRepackage为您完成。您可以在官方用户指南here和here中阅读相关内容。

只需删除您为解压缩依赖项内容所做的一切，并使用此任务获取应用程序的单个jar文件。

顺便说一句，您可能有兴趣看一些其他可能提供更好的存档大小的解决方案，您可以阅读其中一个解决方案，称为Capsule，in this article。

Answer 2

使用当前版本的gradle，将其添加到build.gradle文件的顶部：

plugins {
    id "org.springframework.boot" version "2.0.0.RELEASE"
}

然后只是gradle build - 你不需要做更多的事情。

请参阅this plugin's homepage以查找最新版本。

Answer 3

我从@Stanislav的答案https://docs.spring.io/spring-boot/docs/2.2.6.RELEASE/gradle-plugin/reference/html/#packaging-executable-wars-deployable中发现此链接非常有用。

要构建jar，我使用了bootJar任务来编译jar。（./gradlew bootJar）。我的项目没有bootRepackage任务，并且使用./gradlew build并没有生成具有所需所有依赖项的jar。也许这是我应该尝试使用dependsOn之类的东西进行配置的方法，但是现在这对我有用。

我有一个多模块项目，所以单个模块项目的配置可能有所不同。我还在依赖项中使用了com.graphql-java:graphql-java-spring-boot-starter-webmvc:1.0以及一些常规的sping boot依赖项，因此我的设置并不完全有效。

Gradle：建造胖罐＆＃39; Spring Boot Dependencies

3 个答案: