修复时间工具类bug

elab-core/src/main/java/com/elab/core/utils/DateUtils.java

@@ -15,21 +15,21 @@ import java.util.Date;
  */
 public class DateUtils extends org.apache.commons.lang3.time.DateUtils {
 
-    static ThreadLocal<DateFormat> DATE_FORMAT = new ThreadLocal<DateFormat>() {
+    protected static ThreadLocal<DateFormat> DATE_FORMAT = new ThreadLocal<DateFormat>() {
         @Override
         protected SimpleDateFormat initialValue() {
             return new SimpleDateFormat("yyyy-MM-dd", java.util.Locale.CHINA);
         }
     };
 
-    static ThreadLocal<DateFormat> TIME_FORMAT = new ThreadLocal<DateFormat>() {
+    protected static ThreadLocal<DateFormat> TIME_FORMAT = new ThreadLocal<DateFormat>() {
         @Override
         protected SimpleDateFormat initialValue() {
             return new SimpleDateFormat("HH:mm:ss", java.util.Locale.CHINA);
         }
     };
 
-    static ThreadLocal<DateFormat> DATE_TIME_FORMAT = new ThreadLocal<DateFormat>() {
+    protected static ThreadLocal<DateFormat> DATE_TIME_FORMAT = new ThreadLocal<DateFormat>() {
         @Override
         protected SimpleDateFormat initialValue() {
             return new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", java.util.Locale.CHINA);