spring boot：ClassNotFoundException de.flapdoodle.embed.mongo.distribution.IFeatureAwareVersion

时间：2018-03-20 14:40:03

标签： spring mongodb spring-boot spring-mongodb

我有一个example spring boot project，它使用mongo db来保存对象。我想用嵌入式mongo db测试它，但是我得到一个与this question非常相似的错误（请参阅接受回答的评论）：由于某些原因IFeatureAwareVersion来自flapdoodle不能被发现。

Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.mongodb.core.MongoTemplate]: Factory method 'mongoTemplate' threw exception; nested exception is java.lang.NoClassDefFoundError: de/flapdoodle/embed/mongo/distribution/IFeatureAwareVersion
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:579) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    ... 65 common frames omitted
Caused by: java.lang.NoClassDefFoundError: de/flapdoodle/embed/mongo/distribution/IFeatureAwareVersion
    at cz.jirutka.spring.embedmongo.EmbeddedMongoFactoryBean.<init>(EmbeddedMongoFactoryBean.java:47) ~[embedmongo-spring-1.3.1.jar:1.3.1]
    at com.example.MongoConfig.mongoTemplate(MongoConfig.java:37) ~[test-classes/:na]
    at com.example.MongoConfig$$EnhancerBySpringCGLIB$$108c2b8.CGLIB$mongoTemplate$0(<generated>) ~[test-classes/:na]
    at com.example.MongoConfig$$EnhancerBySpringCGLIB$$108c2b8$$FastClassBySpringCGLIB$$629c796a.invoke(<generated>) ~[test-classes/:na]
    at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228) ~[spring-core-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:361) ~[spring-context-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at com.example.MongoConfig$$EnhancerBySpringCGLIB$$108c2b8.mongoTemplate(<generated>) ~[test-classes/:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_92]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_92]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_92]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_92]
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    ... 66 common frames omitted
Caused by: java.lang.ClassNotFoundException: de.flapdoodle.embed.mongo.distribution.IFeatureAwareVersion
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_92]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_92]
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) ~[na:1.8.0_92]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_92]
    ... 78 common frames omitted

这是pom 

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.example</groupId>
    <artifactId>demo-mongodb</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>demo-mongodb</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.0.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
        <spring-cloud.version>Finchley.M8</spring-cloud.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-mongodb</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
            <scope>runtime</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>de.flapdoodle.embed</groupId>
            <artifactId>de.flapdoodle.embed.mongo</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>cz.jirutka.spring</groupId>
            <artifactId>embedmongo-spring</artifactId>
            <version>1.3.1</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

    <repositories>
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/milestone</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
    </repositories>


</project>

Spring引导启动父2.0.0.RELEASE管理flapdoodle 2.0.3的版本，我在IFeatureAwareVersion中看到了de.flatpdoodle.embed.mongo-2.0.3.jar个类。

当我查看依赖性层次结构时，我看到了

  • embedmongo-spring: 1.3.1 [test]

    • de.flatpdoodle.embed.mongo: 2.0.3 (managed from 1.46.4) (ommitted for conflict with 2.0.3) [test]
    • de.flatpdoodle.embed.process: 1.40.1 (ommitted for conflict with 2.0.2) [test]

这是测试

@RunWith(SpringRunner.class)
@SpringBootTest(classes=MongoConfig.class)
@TestPropertySource(locations = "classpath:application-test.properties")
public class Test_TimezoneDao {

    private static final Logger LOG = LoggerFactory.getLogger(Test_TimezoneDao.class);

    //@Autowired private TimezoneDao dao;
    @Autowired private CounterService counterService;

    @Autowired
    private MongoTemplate mongoTemplate;

    @Test
    public void test() 
    {
        TimeZone tz = new TimeZone();
        tz.setId(counterService.getNextSequence());
        tz.setOffset(9);
        tz.setTz("Asia/Singapore");

        TimeZone tz2 = new TimeZone();
        tz2.setId(counterService.getNextSequence());
        tz2.setOffset(11);
        tz2.setTz("Australia/Sydney");

        mongoTemplate.save(tz);

        List<TimeZone> tzs = mongoTemplate.findAll(TimeZone.class, "timezones");

        for(TimeZone t : tzs)
        {
            LOG.info(t.toString());
        }
    }
}

这是测试配置

@SpringBootConfiguration
@Profile("test")
@ComponentScan(basePackages= {"com.example.demomongodb"})
@EnableJpaRepositories(basePackages= {"com.example.demomongodb"})
@EnableMongoRepositories(basePackages= {"com.example.demomongodb"})
@EntityScan(basePackages= {"com.example.demomongodb"})
@EnableAutoConfiguration
public class MongoConfig 
{
    public MongoConfig()
    {
        System.out.println("============= LOADING MONGO CONFIG ===============");
    }

    @Bean
    public MongoTemplate mongoTemplate() throws IOException {
        EmbeddedMongoFactoryBean mongo = new EmbeddedMongoFactoryBean();
        mongo.setBindIp("localhost");
        MongoClient mongoClient = mongo.getObject();
        MongoTemplate mongoTemplate = new MongoTemplate(mongoClient, "test_or_whatever_you_want_to_call_this_db");
        return mongoTemplate;
    }
}

感谢您的帮助

2 个答案:

答案 0 :(得分：0)

embedmongo-spring有点过时了，它已嵌入mongo，现在无需通过第三方依赖项直接集成到spring boot中。

只需删除此依赖关系，您就应该完成。

您也可以看一下这个问题，它进一步解释了这种情况 https://github.com/flapdoodle-oss/de.flapdoodle.embed.mongo/issues/260

答案 1 :(得分：-2)

删除

<scope>test</scope>

来自

<dependency>
    <groupId>de.flapdoodle.embed</groupId>
    <artifactId>de.flapdoodle.embed.mongo</artifactId>
    <scope>test</scope>
</dependency>

在pom.xml中

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