public static String getStringTime(String date, String time, int days) { String timeStr = date.substring(0, 10) + time.substring(10, 19); if (0 == days) { return timeStr; } else { // 字符串转Date SimpleDateFormat dfs = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); try { java.util.Date timeDate = dfs.parse(timeStr); // 在原有日期上加上days java.util.Date newDate = DateUtil.addDateOneDay(timeDate, days); timeStr = dfs.format(newDate); } catch (ParseException e) { e.printStackTrace(); } return timeStr; } }