NoClassDefFoundError for Gradle fat jar with tests Spring Boot

Question

我需要在 Gradle 项目中创建 fat jar 并测试 Main 方法在 src/test 下。我现在有 Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/cli/CommandLineParser 当我运行由 'gradle bootJar' 创建的 fat jar 时。

我的Gradle:

plugins {
    id 'org.springframework.boot' version '2.1.7.RELEASE'
}

apply plugin: 'io.spring.dependency-management'

dependencies {
    compile group: 'org.springframework', name: 'spring-context', version: '5.1.9.RELEASE'
    compile group: 'org.springframework', name: 'spring-web', version: '5.1.9.RELEASE'
    compile group: 'org.springframework', name: 'spring-aop', version: '5.1.9.RELEASE'
    compile group: 'org.springframework', name: 'spring-aspects', version: '5.1.9.RELEASE'
    compile group: 'org.springframework', name: 'spring-test', version: '5.0.5.RELEASE'

    compile group: 'commons-cli', name: 'commons-cli', version: '1.4'
}

bootJar {
    manifest {
        attributes 'Start-Class': 'com.company.MainRunner'
    }
    from sourceSets.test.output.classesDirs
}

我的spring.xml:

<?xml version="1.0" encoding="UTF-8"?>
<beans default-lazy-init="true" xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
                           http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
                           http://www.springframework.org/schema/context
                           http://www.springframework.org/schema/context/spring-context-4.3.xsd
                           http://www.springframework.org/schema/aop
                           http://www.springframework.org/schema/aop/spring-aop-4.3.xsd">

    <aop:aspectj-autoproxy/>

<bean> ... </bean>
<bean> ... </bean>

</beans>

异常：

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/cli/CommandLineParser

在我将 AspectJ 添加到项目之前，之前遵循 'gradle shadowJar' 的代码运行良好

buildscript {
    repositories {
        jcenter()
        mavenCentral()
    }
    dependencies {
        classpath 'com.github.jengelman.gradle.plugins:shadow:4.0.3'
    }
}

apply plugin: 'com.github.johnrengelman.shadow'

shadowJar {
    manifest {
        attributes 'Main-Class': 'com.company.MainRunner'
    }
    from sourceSets.test.output.classesDirs

    configurations = [project.configurations.testRuntime]
}

错误出现在运行ning 'gradle shadowJar'

Unable to locate Spring NamespaceHandler for XML schema namespace [http://www.springframework.org/schema/aop]

我在某处发现 shadowJar 无法与 Spring

一起正常工作

如何为 Spring 项目在 src/test 下的主要 class 创建 fat jar？

Answer 1

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/cli/CommandLineParser

根据上述错误，您的类路径中似乎缺少库 (Apache Commons-CLI)。因此，添加该库并重试。

关于这个错误，

Unable to locate Spring NamespaceHandler for XML schema namespace [http://www.springframework.org/schema/aop]

使用 aop 命名空间而类路径上没有必要的 aop spring 库时会出现问题。

但我看到你已经导入了那个库。

另一个原因是您正在尝试创建一个 fat.jar 文件，因此在将多个 spring 依赖项合并到一个 jar 文件中时 spring.handlers / spring.schemas 被覆盖。

所以我建议使用Apache Maven Shade Plugin and rebuild the project. And this is the Gradle version of Apache Maven's Shade Plugin。

Answer 2

这个 Gradle shadowJar 适合我

import com.github.jengelman.gradle.plugins.shadow.transformers.AppendingTransformer

shadowJar {
    mergeServiceFiles()
    transform(AppendingTransformer) { resource = 'META-INF/spring.handlers' }
    transform(AppendingTransformer) { resource = 'META-INF/spring.schemas' }

    manifest {
        attributes 'Main-Class': 'com.company.MainRunner'
    }
    from sourceSets.test.output.classesDirs

    configurations = [project.configurations.testRuntime]
}

NoClassDefFoundError for Gradle fat jar with tests Spring Boot

NoClassDefFoundError for Gradle fat jar with tests Spring Boot

java

spring-boot

build.gradle

fatjar