final DataModel dm = new FileDataModel(new File("e:\\recommend\\item.txt"));//文件名一定要是绝对路径  
 
final ItemSimilarity similarity = new LogLikelihoodSimilarity(dm);
GenericItemBasedRecommender recommender = new GenericItemBasedRecommender(dm,similarity);
	        List<RecommendedItem> recommendations=recommender.mostSimilarItems(329387l, 3);
//329387 为itemID
	        for (RecommendedItem recommendation : recommendations) {
				System.out.println(recommendation.getItemID());
				System.out.println(recommendation.getValue());
		}