【发布时间】：2020-11-10 16:49:40
【问题描述】：
我有以下简单的测试项目结构
|TestProject
|
|---project-a
| |---src
| |---main
| |---java
| |---package-name.ProjectA
| |---service
| | |---TestService.java
| |
| |---ProjectAServiceApplication.java
|
|---project-b
| |---src
| |---main
| |---java
| |---package-name.ProjectB
| |---enums
| |---Commodity.java
|
|---build.gradle
|---settings.gradle
build.gradle 看起来像
import com.commercehub.gradle.plugin.avro.GenerateAvroJavaTask
import groovy.json.*
buildscript {
ext {
springCloudVersion = 'Greenwich.RELEASE'
springBootVersion = '2.1.2.RELEASE'
}
repositories {
mavenCentral()
jcenter()
maven {
url "http://packages.confluent.io/maven"
}
maven { url 'https://repo.spring.io/milestone' }
maven { url 'https://projectlombok.org/edge-releases' }
}
dependencies {
classpath "org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}"
classpath "com.commercehub.gradle.plugin:gradle-avro-plugin:0.14.2"
classpath "net.ltgt.gradle:gradle-apt-plugin:0.21"
}
}
plugins {
id "net.ltgt.apt" version "0.21" apply false
id "io.spring.dependency-management" version "1.0.8.RELEASE"
}
subprojects {
// Packer variables
ext {
packerVariablesFolder = "$buildDir/packer"
packerVariablesPath = "$packerVariablesFolder/$packerVariables"
packerTemplateFolder = "../config"
packerTemplatePath = "$packerTemplateFolder/$packerTemplate"
}
apply plugin: 'idea'
apply plugin: 'io.spring.dependency-management'
apply plugin: 'java'
apply plugin: 'java-library'
apply plugin: 'org.springframework.boot'
group = 'de.SWS.PLM'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = '11'
repositories {
mavenCentral()
jcenter()
maven {
url "http://packages.confluent.io/maven"
}
maven { url 'https://repo.spring.io/milestone' }
maven { url 'https://projectlombok.org/edge-releases' }
}
springBoot {
buildInfo()
}
dependencyManagement {
imports {
mavenBom "org.springframework.cloud:spring-cloud-dependencies:${springCloudVersion}"
}
}
ext.convertProjectName = { ->
return project.name.split("(?<!(^|[A-Z]))(?=[A-Z])|(?<!^)(?=[A-Z][a-z])").join("-").toLowerCase()
}
dependencies {
implementation 'org.springframework.boot:spring-boot-starter-actuator'
compile group: 'log4j', name: 'log4j', version: '1.2.17'
compile 'org.apache.commons:commons-lang3:3.10'
compileOnly 'org.projectlombok:lombok:1.18.10'
annotationProcessor 'org.projectlombok:lombok:1.18.10'
testImplementation 'org.springframework.boot:spring-boot-starter-test'
}
task defineBuildVersion {
if (project.hasProperty("revision")) {
ext.imageVersion = version + "-${revision}"
} else {
ext.imageVersion = version + "-SNAPSHOT"
}
}
compileJava {
//raise heap
options.fork = 'true'
options.forkOptions.with {
memoryMaximumSize = '2048m'
}
}
task generatePackerFiles {
doLast {
mkdir "$packerVariablesFolder"
new File("$packerVariablesPath").text = JsonOutput.toJson([
jar_file: jar.archiveName,
logback_file: "logback-pfm.xml",
image_name: "$convertProjectName",
image_tag: "${defineBuildVersion.imageVersion}"
])
}
}
task buildDockerImage(type: Exec) {
dependsOn generatePackerFiles
commandLine 'packer', 'build', "-var-file=${packerVariablesPath}", "${packerTemplatePath}"
}
compileJava {
//raise heap
options.fork = 'true'
options.forkOptions.with {
memoryMaximumSize = '2048m'
}
}
task cleanIntellijDirs(type: Delete) {
delete 'out'
}
}
configure(subprojects.findAll { !['project-b'].contains(it.name)} ) {
dependencies {
implementation project(':project-b')
}
}
settings.gradle 看起来像
rootProject.name = 'TestProject'
include 'project-a'
include 'project-b'
如果我为 project-a gradle :project-a:build 运行 gradlew 任务构建，它会正确构建项目并生成 *.jar 文件。 如果我执行 *.jar 文件，我会得到以下输出
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'testService' defined in URL [jar:file:/C:/Users/sws-216/Documents/Projekte/pfm-project/TestProject/project-a/build/libs/project-a-0.0.1-SNAPSHOT.jar!/BOOT-INF/classes!/de/SWS/PLM/ProjectA/service/TestService.class]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [de.SWS.PLM.ProjectA.service.TestService]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: de/SWS/PLM/Commodity
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1270) ~[spring-beans-5.1.4.RELEASE.jar!/:5.1.4.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1164) ~[spring-beans-5.1.4.RELEASE.jar!/:5.1.4.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:538) ~[spring-beans-5.1.4.RELEASE.jar!/:5.1.4.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:498) ~[spring-beans-5.1.4.RELEASE.jar!/:5.1.4.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) ~[spring-beans-5.1.4.RELEASE.jar!/:5.1.4.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.1.4.RELEASE.jar!/:5.1.4.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) ~[spring-beans-5.1.4.RELEASE.jar!/:5.1.4.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.1.4.RELEASE.jar!/:5.1.4.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:846) ~[spring-beans-5.1.4.RELEASE.jar!/:5.1.4.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:863) ~[spring-context-5.1.4.RELEASE.jar!/:5.1.4.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:546) ~[spring-context-5.1.4.RELEASE.jar!/:5.1.4.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775) ~[spring-boot-2.1.2.RELEASE.jar!/:2.1.2.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) ~[spring-boot-2.1.2.RELEASE.jar!/:2.1.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:316) ~[spring-boot-2.1.2.RELEASE.jar!/:2.1.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260) ~[spring-boot-2.1.2.RELEASE.jar!/:2.1.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248) ~[spring-boot-2.1.2.RELEASE.jar!/:2.1.2.RELEASE]
at de.SWS.PLM.ProjectA.ProjectAServiceApplication.main(ProjectAServiceApplication.java:10) ~[classes!/:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na]
at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48) ~[project-a-0.0.1-SNAPSHOT.jar:na]
at org.springframework.boot.loader.Launcher.launch(Launcher.java:87) ~[project-a-0.0.1-SNAPSHOT.jar:na]
at org.springframework.boot.loader.Launcher.launch(Launcher.java:50) ~[project-a-0.0.1-SNAPSHOT.jar:na]
at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:51) ~[project-a-0.0.1-SNAPSHOT.jar:na]
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [de.SWS.PLM.ProjectA.service.TestService]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: de/SWS/PLM/Commodity
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:184) ~[spring-beans-5.1.4.RELEASE.jar!/:5.1.4.RELEASE]
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:87) ~[spring-beans-5.1.4.RELEASE.jar!/:5.1.4.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1262) ~[spring-beans-5.1.4.RELEASE.jar!/:5.1.4.RELEASE]
... 24 common frames omitted
Caused by: java.lang.NoClassDefFoundError: de/SWS/PLM/Commodity
at de.SWS.PLM.ProjectA.service.TestService.<init>(TestService.java:12) ~[classes!/:na]
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:na]
at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490) ~[na:na]
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:172) ~[spring-beans-5.1.4.RELEASE.jar!/:5.1.4.RELEASE]
... 26 common frames omitted
Caused by: java.lang.ClassNotFoundException: de.SWS.PLM.Commodity
at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:471) ~[na:na]
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:589) ~[na:na]
at org.springframework.boot.loader.LaunchedURLClassLoader.loadClass(LaunchedURLClassLoader.java:93) ~[project-a-0.0.1-SNAPSHOT.jar:na]
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522) ~[na:na]
... 32 common frames omitted
我在设置 gradle 多模块项目时做错了什么？
【问题讨论】：
-
stackoverflow.com/questions/62891554/…我在这里回答了同样的问题
-
project-b是一个库还是一个独立项目，还是只是前者？ （例如，你会运行它吗？） -
project-b 是根项目中的独立项目模块。是的，我用 IntelJ 运行多模块项目没有错误。只有当我构建它并运行 jar 时，我才会得到 classNotFoundException
标签： spring-boot gradle multi-module