java计算两个日期相隔的天数方法

// 计算两个日期相隔的天数public int nDaysBetweenTwoDate(String firstString, String secondString) {SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");Date firstDate = null;Date secondDate = null;try {firstDate = df.parse(firstString);secondDate = df.parse(secondString);} catch (Exception e) {// 日期型字符串格式错误System.out.println("日期型字符串格式错误");}int nDay = (int) ((secondDate.getTime() - firstDate.getTime()) / (24 * 60 * 60 * 1000));return nDay;}

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