Hadoop问题：编译WordCount程序报错：class file for org.apache.commons.cli.Options not found
第一次编译Hadoop的程序，将安装程序自带的WordCount程序拿出来编译执行，编译时遇到如下错误：
ubuntu@ubuntu:~/dev/wordcount$ javac -classpath /home/ubuntu/hadoop-1.0.4/hadoop-core-1.0.4.jar:/home/ubuntu/hadoop-1.0.4/lib/commons-cli-1.2.jar -d bin WordCount.javaubuntu@ubuntu:~/dev/wordcount$ ls bin/*.classbin/WordCount.class bin/WordCount$IntSumReducer.class bin/WordCount$TokenizerMapper.class
