ISSUE #21

app/utils/DateTypeAdapter.java

@@ -0,0 +1,40 @@
+/**
+ * 
+ */
+package utils;
+
+import java.lang.reflect.Type;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+import com.google.gson.InstanceCreator;
+import com.google.gson.JsonDeserializationContext;
+import com.google.gson.JsonDeserializer;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonParseException;
+import com.google.gson.JsonPrimitive;
+import com.google.gson.JsonSerializationContext;
+import com.google.gson.JsonSerializer;
+
+/**
+ * @author eric
+ */
+public class DateTypeAdapter implements	InstanceCreator, JsonSerializer, JsonDeserializer {
+
+	@Override
+	public Object createInstance(Type type) {
+		return null;
+	}
+
+	@Override
+	public JsonElement serialize(Object obj, Type type, JsonSerializationContext ctx) {
+		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
+		JsonElement ele = new JsonPrimitive(sdf.format((Date)obj));
+		return ele;
+	}
+
+	@Override
+	public Object deserialize(JsonElement ele, Type type, JsonDeserializationContext ctx) throws JsonParseException {
+		return null;
+	}
+}

app/utils/RenderJsonExclusion.java

@@ -1,5 +1,8 @@
 package utils;
 
+import java.sql.Timestamp;
+import java.util.Date;
+
 import play.mvc.results.RenderJson;
 
 import com.google.gson.ExclusionStrategy;
@@ -9,7 +12,12 @@ public class RenderJsonExclusion extends RenderJson {
 
 	public RenderJsonExclusion(Object o, ExclusionStrategy exclusionStrategy) {
 		super(new GsonBuilder().setExclusionStrategies(exclusionStrategy)
-				.serializeNulls().create().toJson(o)); 
+				.serializeNulls().
+				setDateFormat("yyyy/MM/dd").
+				registerTypeAdapter(Timestamp.class, new DateTypeAdapter()).
+				registerTypeAdapter(Date.class, new DateTypeAdapter()).
+				registerTypeAdapter(java.sql.Date.class, new DateTypeAdapter()).
+				create().toJson(o)); 
 	}
 
 	public RenderJsonExclusion(Object o) {