首先用maven构建项目框架,然后写完code之后(详见:http://www.cnblogs.com/flying5/archive/2011/05/04/2078408.html),采用maven package打包成jar包:wordcount.jar。然后拷贝到布置好的hadoop服务器上。
构建输入数据:
hadoop fs -put input1.txt ./input/wordcount
hadoop fs -put input2.txt ./input/wordcount
运行job即可:
hadoop jar wordcount.jar com.*.wordcount.job.JobRunner ./input/wordcount ./output/wordcount
运行完之后,查看结果:
hadoop fs -ls ./output/wordcount
会发现有文件part-00000
hadoop fs -cat ./output/wordcount/part-00000
就可以看到hadoop结果了。