Update DateUtil.java

src/main/java/com/egolm/common/DateUtil.java

@@ -426,6 +426,27 @@ public class DateUtil {
 	    c.add(Calendar.MONTH, 0);
 	    c.set(Calendar.DAY_OF_MONTH,1);//设置为1号,当前日期既为本月第一天 
 		return c.getTime();
+	}
+		/**
+
+	 * 获取指定日期下个月的第一天 的日期
+	* @param dateStr
+	* @param format   
+	* @return
+	*/
+	public static String getFirstDayOfNextMonth(String dateStr,String format){ 
+		SimpleDateFormat sdf = new SimpleDateFormat(format);
+		try {
+			Date date = sdf.parse(dateStr);
+			Calendar calendar = Calendar.getInstance();   
+			calendar.setTime(date);
+			calendar.set(Calendar.DAY_OF_MONTH,1);
+			calendar.add(Calendar.MONTH, 1);
+			return sdf.format(calendar.getTime());
+		} catch (ParseException e) {
+			e.printStackTrace();
+		}
+		return null;
 	} 
 	public static String getTimeStamp() {
 		return String.valueOf(System.currentTimeMillis() / 1000);