AWS SDK for Java教程示例缺少類

Question

在AWS SDK for Java入門教程之后，運行AwsConsoleApp示例：

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

我得到以下問題：

===========================================
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

編譯時在類路徑中加載的相同完整SDK也在運行時期間給出，因此我無法弄清楚缺少什么。

Answer 1

在SDK先決條件中 ，您有：

需要Apache Commons （ Codec ， HTTP Client和Logging ）第三方軟件包，它們包含在SDK的第三方目錄中。

所以我只是將它們添加到我的.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，將這些路徑添加到系統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

然后確保在應用這些后啟動新的cmd提示窗口。