NoClassDefFoundError异常：
org / apache / http / protocol / HttpRequestExecutor：
java.lang.NoClassDefFoundError
java.lang.NoClassDefFoundError：
org / apache / http / protocol / HttpRequestExecutor
在com.amazonaws.http.AmazonHttpClient。（AmazonHttpClient.java:156）
访问com.amazonaws.AmazonWebServiceClient。 （AmazonWebServiceClient.java:226）
访问com.amazonaws.AmazonWebServiceClient。 （AmazonWebServiceClient.java:215）
在com.amazonaws.services.s3.AmazonS3Client。（AmazonS3Client.java:682）
在com.amazonaws.services.s3.AmazonS3Builder $ 1.apply（AmazonS3Builder.java:35）
在com.amazonaws.services.s3.AmazonS3Builder $ 1.apply（AmazonS3Builder.java:32）
在com.amazonaws.services.s3.AmazonS3ClientBuilder.build（AmazonS3ClientBuilder.java:64）
在com.amazonaws.services.s3.AmazonS3ClientBuilder.build（AmazonS3ClientBuilder.java:28）
在com.amazonaws.client.builder.AwsSyncClientBuilder.build（AwsSyncClientBuilder.java:46
请注意，它找不到课程：org/apache/http/protocol/HttpRequestExecutor
apache http类很多，尽管重建了，但上面的类似乎丢失了。 POM如下所示。
知道为什么可能缺少该特定班级吗？
瓶子内容：
$ jar tvf target/demo-1.0.0.jar | grep -i HttpRequestE
2545 Fri May 10 21:12:24 EDT 2019 com/amazonaws/http/protocol/SdkHttpRequestExecutor.class
$ jar tvf target/demo-1.0.0.jar | grep -i protocol | grep http
0 Fri May 10 21:12:24 EDT 2019 com/amazonaws/http/protocol/
2545 Fri May 10 21:12:24 EDT 2019 com/amazonaws/http/protocol/SdkHttpRequestExecutor.class
1423 Fri May 10 21:12:24 EDT 2019 com/amazonaws/http/conn/ssl/TLSProtocol.class
0 Fri May 10 21:12:24 EDT 2019 org/apache/http/client/protocol/
2667 Fri May 10 21:12:24 EDT 2019 org/apache/http/client/protocol/RequestClientConnControl.class
852 Fri May 10 21:12:24 EDT 2019 org/apache/http/client/protocol/ResponseAuthCache$1.class
7352 Fri May 10 21:12:24 EDT 2019 org/apache/http/client/protocol/RequestAddCookies.class
5001 Fri May 10 21:12:24 EDT 2019 org/apache/http/client/protocol/RequestAuthCache.class
1814 Fri May 10 21:12:24 EDT 2019 org/apache/http/client/protocol/ClientContextConfigurer.class
2485 Fri May 10 21:12:24 EDT 2019 org/apache/http/client/protocol/RequestExpectContinue.class
5071 Fri May 10 21:12:24 EDT 2019 org/apache/http/client/protocol/ResponseContentEncoding.class
4521 Fri May 10 21:12:24 EDT 2019 org/apache/http/client/protocol/RequestAuthenticationBase.class
6520 Fri May 10 21:12:24 EDT 2019 org/apache/http/client/protocol/HttpClientContext.class
5647 Fri May 10 21:12:24 EDT 2019 org/apache/http/client/protocol/ResponseProcessCookies.class
1190 Fri May 10 21:12:24 EDT 2019 org/apache/http/client/protocol/ClientContext.class
5053 Fri May 10 21:12:24 EDT 2019 org/apache/http/client/protocol/ResponseAuthCache.class
2742 Fri May 10 21:12:24 EDT 2019 org/apache/http/client/protocol/RequestProxyAuthentication.class
7009 Fri May 10 21:12:24 EDT 2019 org/apache/http/impl/execchain/ProtocolExec.class
910 Fri May 10 21:12:24 EDT 2019 org/apache/http/client/ClientProtocolException.class
1219 Fri May 10 21:12:24 EDT 2019 org/apache/http/auth/AuthProtocolState.class
2523 Fri May 10 21:12:24 EDT 2019 org/apache/http/client/protocol/RequestAcceptEncoding.class
2465 Fri May 10 21:12:24 EDT 2019 org/apache/http/client/protocol/RequestDefaultHeaders.class
934 Fri May 10 21:12:24 EDT 2019 org/apache/http/client/protocol/RequestAuthenticationBase$1.class
2544 Fri May 10 21:12:24 EDT 2019 org/apache/http/client/protocol/RequestTargetAuthentication.class
<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>test.lambda</groupId>
<artifactId>demo</artifactId>
<version>1.0.0</version>
<packaging>jar</packaging>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>com.amazonaws</groupId>
<artifactId>aws-java-sdk-bom</artifactId>
<version>1.11.550</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-core</artifactId>
<version>2.7.22</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.amazonaws</groupId>
<artifactId>aws-java-sdk-s3</artifactId>
</dependency>
<dependency>
<groupId>com.amazonaws</groupId>
<artifactId>aws-lambda-java-events</artifactId>
<version>1.3.0</version>
</dependency>
<dependency>
<groupId>com.amazonaws</groupId>
<artifactId>aws-lambda-java-core</artifactId>
<version>1.1.0</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.6.0</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<encoding>UTF-8</encoding>
<forceJavacCompilerUse>true</forceJavacCompilerUse>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.0.0</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
public class LambdaFunctionHandler implements RequestHandler<S3Event, String> {
private AmazonS3 s3 = AmazonS3ClientBuilder.standard().build();
public LambdaFunctionHandler() {}
@Override
public String handleRequest(S3Event event, Context context) {
context.getLogger().log("Received event: " + event);
// Get the object from the event and show its content type
String bucket = event.getRecords().get(0).getS3().getBucket().getName();
String key = event.getRecords().get(0).getS3().getObject().getKey();
try {
S3Object response = s3.getObject(new GetObjectRequest(bucket, key));
String contentType = response.getObjectMetadata().getContentType();
context.getLogger().log("CONTENT TYPE: " + contentType);
return contentType;
} catch (Exception e) {
e.printStackTrace();
context.getLogger().log(String.format(
"Error getting object %s from bucket %s. Make sure they exist and"
+ " your bucket is in the same region as this function.", key, bucket));
throw e;
}
}
}