悟寰轩-叶秋

摘要： 来自：http://blog.csdn.net/hezuoxiang/article/details/6878026写了个mapreduce的JAVA程序，自定义了个partitionclass indexPartition extends HashPartitioner{public int getPartition(Text key, Text value,int numReduceTasks){Text tmp = new Text(key.toString().substring(0,key.toString().indexOf(":"))); super.getP 阅读全文