摘自:http://blog.fens.me/mahout-recommendation-api/ 测试程序:RecommenderTest.java 测试数据集:item.csv 1,101,5.0 1,102,3.0 1,103,2.5 2,101,2.0 2,102,2.5 2,103,5.0 2,104,2.0 3,101,2.5 3,104,4.0 3,105,4.5 测试程序:org.conan.mymahout.recommendation.job.RecommenderTest.