增加日期格式化方法

eladmin-common/src/main/java/me/zhengjie/utils/DateUtil.java

@@ -30,9 +30,9 @@ public class DateUtil {
 
     public static final DateTimeFormatter DFY_MD_HMS = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
     public static final DateTimeFormatter DFY_MD = DateTimeFormatter.ofPattern("yyyy-MM-dd");
-    public static final String FORMAT_YEAR_WITH_CHINESE_SEPARATOR = "yyyy年";
-    public static final String FORMAT_MONTH_WITH_CHINESE_SEPARATOR_AND_NO_ZERO_FILLED = "yyyy年M月";
-    public static final String FORMAT_DATE_WITH_CHINESE_SEPARATOR_AND_NO_ZERO_FILLED = "yyyy年M月d日";
+    public static final String YEAR_FORMAT_NUM = "yyyy";
+    public static final String YEAR_FORMAT_WITH_CHINESE_SEPARATOR = "yyyy年";
+    public static final String DATE_FORMAT_WITH_CHINESE_SEPARATOR_AND_NO_ZERO_FILLED = "yyyy年M月d日";
 
     /**
      * LocalDateTime 转时间戳
@@ -163,13 +163,24 @@ public class DateUtil {
     }
 
     /**
+     * 将日期格式化成纯数字表示的年份
+     *
+     * @param date
+     * @return
+     */
+    public static String formatYearToNum(Date date) {
+        SimpleDateFormat destDateFormat = new SimpleDateFormat(YEAR_FORMAT_NUM);
+        return destDateFormat.format(date);
+    }
+
+    /**
      * 将日期格式化成用中文分割符表示的年份
      *
      * @param date
      * @return
      */
     public static String formatYearWithChineseSeparator(Date date) {
-        SimpleDateFormat destDateFormat = new SimpleDateFormat(FORMAT_YEAR_WITH_CHINESE_SEPARATOR);
+        SimpleDateFormat destDateFormat = new SimpleDateFormat(YEAR_FORMAT_WITH_CHINESE_SEPARATOR);
         return destDateFormat.format(date);
     }
 
@@ -183,7 +194,7 @@ public class DateUtil {
      */
     public static String formatDateWithChineseSeparatorAndNoZeroFilled(String date, String srcFormat) throws Exception {
         SimpleDateFormat srcDateFormat = new SimpleDateFormat(srcFormat);
-        SimpleDateFormat destDateFormat = new SimpleDateFormat(FORMAT_DATE_WITH_CHINESE_SEPARATOR_AND_NO_ZERO_FILLED);
+        SimpleDateFormat destDateFormat = new SimpleDateFormat(DATE_FORMAT_WITH_CHINESE_SEPARATOR_AND_NO_ZERO_FILLED);
         return destDateFormat.format(srcDateFormat.parse(date));
     }
 
@@ -194,7 +205,7 @@ public class DateUtil {
      * @return
      */
     public static String formatDateWithChineseSeparatorAndNoZeroFilled(Date date) {
-        SimpleDateFormat destDateFormat = new SimpleDateFormat(FORMAT_DATE_WITH_CHINESE_SEPARATOR_AND_NO_ZERO_FILLED);
+        SimpleDateFormat destDateFormat = new SimpleDateFormat(DATE_FORMAT_WITH_CHINESE_SEPARATOR_AND_NO_ZERO_FILLED);
         return destDateFormat.format(date);
     }