AWS 开发工具包 NoClassDefFoundError

Question

我目前正在尝试在我的项目中使用 AWS SDK（特别是 s3 SDK），但一直出现异常

java.lang.NoClassDefFoundError:com/amazonaws/services/s3/AmazonS3ClientBuilder

我已经使用 maven 将 SDK 导入到我的项目中，如 SDK 文档中所示 here。我运行导致这种情况发生的代码是

AmazonS3 amazonS3 = AmazonS3ClientBuilder.standard().withRegion(Regions.EU_WEST_1).build();

我怀疑问题可能是由于 AWS SDK 所需的版本与我自己导入的版本之间的 Jackson 版本冲突而发生的，以便在项目中的其他地方使用，尽管更改它似乎没有解决了这个问题。我将在下面包含我的 POM.xml 文件。

提前致谢。

<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/maven-v4_0_0.xsd">

<modelVersion>4.0.0</modelVersion>

<groupId>com.projectname.restservice</groupId>
<artifactId>ProjectName</artifactId>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<name>ProjectName</name>

<build>
    <finalName>ProjectName</finalName>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>2.5.1</version>
            <inherited>true</inherited>
            <configuration>
                <source>1.8</source>
                <target>1.8</target>
            </configuration>
        </plugin>
    </plugins>
</build>

<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.glassfish.jersey</groupId>
            <artifactId>jersey-bom</artifactId>
            <version>2.16</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
        <dependency>
            <groupId>com.amazonaws</groupId>
            <artifactId>aws-java-sdk-bom</artifactId>
            <version>1.11.22</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>

<dependencies>
    <dependency>
        <groupId>org.glassfish.jersey.containers</groupId>
        <artifactId>jersey-container-servlet-core</artifactId>
    </dependency>

    <!--Removed due to possible conflict with AWS SDK?-->
    <!--<dependency>
        <groupId>org.glassfish.jersey.media</groupId>
        <artifactId>jersey-media-json-jackson</artifactId>
    </dependency>-->

    <dependency>
        <groupId>org.glassfish.jersey.media</groupId>
        <artifactId>jersey-media-multipart</artifactId>
    </dependency>

    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.35</version>
    </dependency>

    <dependency>
        <groupId>com.amazonaws</groupId>
        <artifactId>aws-java-sdk-s3</artifactId>
    </dependency>

</dependencies>

输出：mvn dependency:tree -Dverbose -Dincludes=com.amazonaws

com.trailfinder.restservice:TrailFinderRestService:war:1.0-SNAPSHOT
[INFO] \- com.amazonaws:aws-java-sdk-s3:jar:1.11.22:compile
[INFO]    +- com.amazonaws:aws-java-sdk-kms:jar:1.11.22:compile
[INFO]    |  \- (com.amazonaws:aws-java-sdk-core:jar:1.11.22:compile - omitted for duplicate)
[INFO]    \- com.amazonaws:aws-java-sdk-core:jar:1.11.22:compile

Answer 1

我想，我已经找到了这个问题的解决方案/解决方法。感谢@DaveMaple 的建议，我尝试通过命令行构建应用程序并手动部署 .war，这似乎有效。

根据this question IntelliJ IDEA uses its own build process and not Mavens. This leads me to believe that the issue was with IntelliJ's build process and nothing to do with AWS SDK or Maven. To work around this issue I configured IntelliJ to not use its own build process but instead to use Maven and then to deploy the resulting .war. Explanation on how to do this can be found here.

AWS 开发工具包 NoClassDefFoundError

AWS SDK NoClassDefFoundError

java

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maven

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