Libimseti上的匿名用户推荐系统

来源：互联网发布：桌面中考倒计时软件编辑：程序博客网时间：2024/04/27 20:41
<span style="font-size:18px;">/*** * @author YangXin * @date 2016/2/19 * @info Libimseti上的匿名用户推荐系统 */package unitFive;import java.io.File;import java.io.IOException;import java.util.List;import org.apache.mahout.cf.taste.common.TasteException;import org.apache.mahout.cf.taste.impl.model.GenericUserPreferenceArray;import org.apache.mahout.cf.taste.impl.model.PlusAnonymousUserDataModel;import org.apache.mahout.cf.taste.impl.model.file.FileDataModel;import org.apache.mahout.cf.taste.model.DataModel;import org.apache.mahout.cf.taste.model.PreferenceArray;import org.apache.mahout.cf.taste.recommender.RecommendedItem;public class LibimsetiWithAnonymousRecommender extends LibimsetiRecommender {private final PlusAnonymousUserDataModel plusAnonymousModel;//注这里的readResouceToTempFile待实现public LibimsetiWithAnonymousRecommender() throws TasteException, IOException{this(new FileDataModel(readResourceToTempFile("E:\\mahout项目\\examples\\ratings.dat")));}/*** * 此方法封装了如何将资源转换为加载的文件，此处未实现 * @param string * @return */private static File readResourceToTempFile(String string) {// TODO Auto-generated method stubreturn null;}public LibimsetiWithAnonymousRecommender(DataModel model) throws TasteException, IOException{super(new PlusAnonymousUserDataModel(model));plusAnonymousModel = (PlusAnonymousUserDataModel)getDataModel();}public synchronized List<RecommendedItem> recommend(PreferenceArray anonymouseUserPrefs, int howMany) throws TasteException{plusAnonymousModel.setTempPrefs(anonymouseUserPrefs);List<RecommendedItem> recommendations = recommend(PlusAnonymousUserDataModel.TEMP_USER_ID, howMany, null);plusAnonymousModel.clearTempPrefs();return recommendations;}public static void main(String[] args) throws Exception{PreferenceArray anonymousPrefs = new GenericUserPreferenceArray(3);anonymousPrefs.setUserID(0, PlusAnonymousUserDataModel.TEMP_USER_ID);anonymousPrefs.setItemID(0, 123L);anonymousPrefs.setValue(0, 1.0f);anonymousPrefs.setItemID(1, 123L);anonymousPrefs.setValue(1, 3.0f);anonymousPrefs.setItemID(2, 123L);anonymousPrefs.setValue(2, 2.0f);LibimsetiWithAnonymousRecommender recommender = new LibimsetiWithAnonymousRecommender();List<RecommendedItem> recommendations = recommender.recommend(anonymousPrefs, 10);System.out.println(recommendations);}}</span>
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