hungtt-commit fix timzoneUtils

src/main/java/com/viettel/campaign/utils/TimeZoneUtils.java

@@ -5,14 +5,11 @@
  */
 package com.viettel.campaign.utils;
 
-import org.apache.log4j.Logger;
-
 import java.text.ParseException;
 import java.text.SimpleDateFormat;
 import java.util.Date;
 import java.util.TimeZone;
 import java.util.concurrent.TimeUnit;
-import java.util.logging.Level;
 
 /**
  *
@@ -86,7 +83,7 @@ public class TimeZoneUtils {
     public static String toDateStringWithTimeZone(Date date, TimeZone tz){
         SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy HH:mm:ss");
         sdf.setTimeZone(tz);
-        return sdf.format(date);
+        return date == null ? null : sdf.format(date);
     }
 
     public static TimeZone getZone(Long timeZone){