diff --git a/panda-code/src/main/java/org/panda/code/uitl/DateUtil.java b/panda-code/src/main/java/org/panda/code/uitl/DateUtil.java
index f39ed7f..f877304 100644
--- a/panda-code/src/main/java/org/panda/code/uitl/DateUtil.java
+++ b/panda-code/src/main/java/org/panda/code/uitl/DateUtil.java
@@ -38,15 +38,14 @@ public class DateUtil {
      * @return
      */
     public static String getDateToStr(Date date,String pattern){
-        String str=null;
-        if (StringUtil.isNull(pattern)){
+        if (StringUtil.isEmpty(pattern)){
             pattern = DEFAULT_PATTERN;
         }
         SimpleDateFormat sdf=new SimpleDateFormat(pattern);
         if (date == null){
             throw new NullPointerException("====== date 对象为空 null======");
         }
-        str=sdf.format(date);
+        String str=sdf.format(date);
         return str;
     }
 
@@ -58,7 +57,7 @@ public class DateUtil {
      * @throws ParseException
      */
     public static Date strToDate(String strDate,String pattern) throws ParseException {
-        if (StringUtil.isNull(pattern)){
+        if (StringUtil.isEmpty(pattern)){
                 pattern = DEFAULT_PATTERN;
         }
 
@@ -95,11 +94,6 @@ public class DateUtil {
 
     }
 
-    public static void main(String[] args) {
-        String str = dataFormat(System.currentTimeMillis());
-        LOGGER.debug(str);
-
-    }
 
 }