[3.4.0-map-sdk] add note

OCH/mogo-och-common-module/src/main/java/com/mogo/och/common/module/utils/DateTimeUtil.java

@@ -35,11 +35,7 @@ public class DateTimeUtil {
     public static boolean compareDateIsCurrentDay(Calendar targetCalendar){
         Calendar currentCale = DateTimeUtils.getCurrentDateTime();
         String currentDay = formatCalendarToString(currentCale, yyyy_MM_dd);
-        if (currentDay.equals(formatCalendarToString(targetCalendar, yyyy_MM_dd))){
-            return true;
-        }else {
-            return false;
-        }
+        return currentDay.equals(formatCalendarToString(targetCalendar, yyyy_MM_dd));
     }
 
     public static Calendar formatLongToCalendar(long time){

core/mogo-core-utils/src/main/java/com/mogo/eagle/core/utilcode/util/DateTimeUtils.java

@@ -8,6 +8,9 @@ import java.util.Date;
 import java.util.Locale;
 import java.util.regex.Pattern;
 
+/**
+ * thread not safe , recommend to use {@link TimeUtils}
+ */
 public class DateTimeUtils {
 
     public static final int DATETIME_FIELD_REFERSH = 10; // 刷新时间(分钟),

core/mogo-core-utils/src/main/java/com/mogo/eagle/core/utilcode/util/TimeUtils.java

@@ -23,6 +23,9 @@ import com.mogo.eagle.core.utilcode.constant.TimeConstants;
  *     blog  : http://blankj.com
  *     time  : 2016/08/02
  *     desc  : utils about time
+ *
+ *     DateTimeFormatter or ThreadLocal  thread safe
+ *
  * </pre>
  */
 public final class TimeUtils {