1、使用WordCount原始碼，修改其Map，在Map中使用IKAnalyzer的分詞功能。原始碼參照：

http://www.cnblogs.com/jiejue/archive/2012/12/16/2820788.html

2、打包上傳到Hadoop叢集，每臺機器都上傳，上傳時包含了所有相關的jar，放到一個目錄下

3、按如下兩種方式執行都報錯

[[email protected] wordcount]$ /opt/modules/hadoop/hadoop-1.0.3/bin/hadoop jar ChineseWordCount.jar  /user/root/hadoop/ /output6
Exception in thread "main" java.lang.ClassNotFoundException: /user/root/hadoop/
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at org.apache.hadoop.util.RunJar.main(RunJar.java:149)
[

[email protected] wordcount]$ /opt/modules/hadoop/hadoop-1.0.3/bin/hadoop jar ChineseWordCount.jar  ChineseWordCount /user/root/hadoop/ /output6
Exception in thread "main" java.lang.ClassNotFoundException: WordCount
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at org.apache.hadoop.util.RunJar.main(RunJar.java:149)

4、解決辦法：ChineseWordCount增加名稱空間；~~~都是預設示例惹的禍，預設示例[[email protected] hadoop-1.0.3]$hadoop jar hadoop-examples-1.0.3.jar  wordcount /user/root/hadoop/ /output5 執行成功。

正確執行命令：[[email protected] wordcount]$ /opt/modules/hadoop/hadoop-1.0.3/bin/hadoop jar ChineseWordCount.jar  org.apache.hadoop.examples.ChineseWordCount /user/root/hadoop/ /output6