Question

我是Java JPA的新手 - Spring Boot。我想创建一个JPA查找，它将计算两个日期之间的行数。

我需要一个数字，显示过去28天内加入的成员数量。就像10。

但是也得到一个值，表明与上个月的差异 - 所以+ 4％ - 或-2％ - 所以我想它将是count1 / count2 * 100 =差异。你如何检测极性 - 所以评估它的消极或正面？

目前我有类似的东西

long countByRegisteredDateAfter(Date thresholdDate) throws Exception;

但需要一些更像这样的东西

long countByRegisteredBeforeDateAfter(Date thresholdDate1, Date thresholdDate2)
    throws Exception;

也许像这样更精细的调整

long countByRegisteredBeforeAndDateAfterAndRole(Date thresholdDate1, Date thresholdDate2, String role)
    throws Exception;

到目前为止

代码：

            // 28 days ago
            Calendar thresholdPast28 = Calendar.getInstance();
            thresholdPast28.set(Calendar.HOUR_OF_DAY,0);
            thresholdPast28.set(Calendar.MINUTE,0);
            thresholdPast28.set(Calendar.SECOND,0);
            thresholdPast28.add(Calendar.DATE,-28);

            java.util.Date thresholdPast28Date = thresholdPast28.getTime();
            Long countLast28Days = (Long) tblLoginRepository.countByRegisteredDateAfter(thresholdPast28Date);

            System.out.println("countLast28Days " + countLast28Days);


            // 56 days ago
            Calendar thresholdPast56 = Calendar.getInstance();
            thresholdPast56.set(Calendar.HOUR_OF_DAY,0);
            thresholdPast56.set(Calendar.MINUTE,0);
            thresholdPast56.set(Calendar.SECOND,0);
            thresholdPast56.add(Calendar.DATE,-28);

            java.util.Date thresholdPast56Date = thresholdPast56.getTime();
            Long countLast56Days = (Long) tblLoginRepository.countByRegisteredDateAfter(thresholdPast56Date);

            System.out.println("countLast56Days " + countLast56Days);

Answer 1

我有点困惑，因为主题声明你想要尝试在之前和之后找到日期，而在以后你想要它们之间。然而，在try：

之间获取日期

long countByRegisteredDateBetween(Date thresholdDate1, Date thresholdDate2)

或在第二个例子中

long countByRegisteredDateBetweenAndRole(Date thresholdDate1, Date thresholdDate2, String role)

并尝试之前和之后尝试：

long countByRegisteredDateBeforeAndRegisteredDateAfter(Date thresholdDate1, Date thresholdDate2)

与角色案例类似

Spring Data JPA - 在日期之前和之后构建查询

1 个答案: