修复推荐界面查询用户评分过的电影，电影评分显示异常bug

fansy1990 · Aug 22, 2016 · 0f78828 · 0f78828
1 parent d1269b9
commit 0f78828
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Showing 3 changed files with 32 additions and 4 deletions.
diff --git a/src/model/Movie.java b/src/model/Movie.java
@@ -1,5 +1,9 @@
 package model;
 
+import java.lang.reflect.InvocationTargetException;
+
+import org.apache.commons.beanutils.BeanUtils;
+
 public class Movie implements Comparable<Movie>{
 //MovieID::Title::Genres
 	private Integer id;
@@ -53,4 +57,15 @@ public String toString() {
 			return this.id+"|"+this.title+"|"+this.genres+"|"+this.rated;
 		}
 
+	public Movie deepCopy(){
+		try {
+			Movie copy  =  (Movie) BeanUtils.cloneBean(this);
+			return copy;
+		} catch (IllegalAccessException | InstantiationException | InvocationTargetException
+				| NoSuchMethodException e) {
+			// TODO Auto-generated catch block
+			e.printStackTrace();
+		}
+		return null;
+	}
 }
diff --git a/src/recommend/Recommend.java b/src/recommend/Recommend.java
@@ -2,6 +2,7 @@
 
 import java.io.IOException;
 import java.io.PrintWriter;
+import java.lang.reflect.InvocationTargetException;
 import java.util.List;
 
 import javax.servlet.ServletException;
@@ -39,7 +40,13 @@ protected void doGet(HttpServletRequest request, HttpServletResponse response) t
 		List<Movie> rec =null;
 		if("recommend".equals(flag)){
 			recNum = request.getParameter("recommendNum");
-			rec= Utils.predict(Integer.parseInt(uid),Integer.parseInt(recNum));
+			try {
+				rec= Utils.predict(Integer.parseInt(uid),Integer.parseInt(recNum));
+			} catch (NumberFormatException | IllegalAccessException | InstantiationException | InvocationTargetException
+					| NoSuchMethodException e) {
+				// TODO Auto-generated catch block
+				e.printStackTrace();
+			}
 		}else{
 			rec = Utils.check(Integer.parseInt(uid));
 		}

diff --git a/src/util/Utils.java b/src/util/Utils.java
@@ -3,12 +3,14 @@
 import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStreamReader;
+import java.lang.reflect.InvocationTargetException;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
+
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.FileStatus;
 import org.apache.hadoop.fs.FileSystem;
@@ -171,8 +173,12 @@ public static String readHDFS(String outputPath) {
 	 * @param uid
 	 * @param recNum
 	 * @return
+	 * @throws NoSuchMethodException 
+	 * @throws InvocationTargetException 
+	 * @throws InstantiationException 
+	 * @throws IllegalAccessException 
 	 */
-	public static List<Movie> predict(int uid,int recNum) {
+	public static List<Movie> predict(int uid,int recNum) throws IllegalAccessException, InstantiationException, InvocationTargetException, NoSuchMethodException {
 		if (userFeatures.size() <= 0 || productFeatures.size() <= 0) {
 			try {
 				userFeatures = getModelFeatures(userFeaturePath);
@@ -198,7 +204,7 @@ public static List<Movie> predict(int uid,int recNum) {
 		double score = 0.0;
 		BLAS blas = BLAS.getInstance();
 		for (int candidate : candidates) {
-			movie = movies.get(candidate);
+			movie = movies.get(candidate).deepCopy();
 			pFeature = productFeatures.get(candidate);
 			if (pFeature == null)
 				continue;
@@ -339,7 +345,7 @@ public static void init() throws IOException {
 	private static Map<Integer, double[]> userFeatures = new HashMap<>();
 	private static Map<Integer, double[]> productFeatures = new HashMap<>();
 
-	public static void main(String[] args) throws IOException {
+	public static void main(String[] args) throws IOException, IllegalAccessException, InstantiationException, InvocationTargetException, NoSuchMethodException {
 		init();
 
 		int uid = 1;