Question

在 AWS SDK for Java 教程入门后，运行AwsConsoleApp示例：

java -cp .:/Users/marius/Dev/aws-java-sdk-1.3.8/lib/aws-java-sdk-1.3.8.jar AwsConsoleApp

我遇到以下问题：

===========================================
Welcome to the AWS Java SDK!
===========================================
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory
    at com.amazonaws.util.VersionInfoUtils.<clinit>(VersionInfoUtils.java:41)
    at com.amazonaws.ClientConfiguration.<clinit>(ClientConfiguration.java:31)
    at com.amazonaws.services.ec2.AmazonEC2Client.<init>(AmazonEC2Client.java:95)
    at AwsConsoleApp.init(AwsConsoleApp.java:93)
    at AwsConsoleApp.main(AwsConsoleApp.java:105)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
    ... 5 more

在运行时也会在编译时在类路径中加载相同的完整SDK，因此我无法弄清楚缺少的内容。

Answer 1

在SDK prerequisites中，你有：

需要 Apache Commons （ Codec ， HTTP客户端和正在记录）第三方软件包，包含在SDK的第三方目录中。

所以我只是将它们添加到我的.bashrc：

#   Apache Commons Logging
export CLASSPATH=$CLASSPATH:/Users/marius/Dev/aws-java-sdk-1.3.8/third-party/commons-logging-1.1.1/*
#   Apache Commons HTTP Client
export CLASSPATH=$CLASSPATH:/Users/marius/Dev/aws-java-sdk-1.3.8/third-party/httpcomponents-client-4.1.1/*
#   Apache Commons Codec
export CLASSPATH=$CLASSPATH:/Users/marius/Dev/aws-java-sdk-1.3.8/third-party/commons-codec-1.3/*

Answer 2

在Windows上，将这些路径添加到系统CLASSPATH

C:\aws-java-sdk-1.3.21.1\lib\aws-java-sdk-1.3.21.1.jar;
C:\aws-java-sdk-1.3.21.1\third-party\commons-logging-1.1.1\commons-logging-1.1.1.jar;
C:\aws-java-sdk-1.3.21.1\third-party\commons-codec-1.3\commons-codec-1.3.jar;
C:\aws-java-sdk-1.3.21.1\third-party\httpcomponents-client-4.1.1\httpclient-4.1.1.jar;
C:\aws-java-sdk-1.3.21.1\third-party\httpcomponents-client-4.1.1\httpcore-4.1.jar

然后确保在应用这些后启动新的cmd提示窗口。

AWS SDK for Java教程示例缺少类

2 个答案: