Question

我在JPA本机查询中传递了LocalDate。但是它将其作为String并执行。

当我在MySql Workbench中执行相同的查询时，以及使用本机查询从Java中执行相同的查询时，都会得到不同的结果。

在MySQL Workbench中：

select sum(expense_amount) from budgetreferee.br_expense 
where household_id=1 and next_due_date between 2018-08-01 and 2019-07-31 
  and category_id IN(41,51,58,70,74,83,94,2,20,10,9,22,28) OR 
    is_bill=TRUE and expense_id IS NOT NULL;

结果是：58171.00

使用本机查询：

@Query(value = "select sum(expense_amount) from br_expense where household_id=:householdId and next_due_date between str_to_date(:startDate,'%Y-%m-%d') and str_to_date(:endDate,'%Y-%m-%d') and category_id IN(41,51,58,70,74,83,94,2,20,10,9,22,28) OR is_bill=TRUE and expense_id IS NOT NULL;",nativeQuery = true)
BigDecimal getTotalExpenseAmount(@Param("householdId") Long householdId, @Param("startDate") LocalDate startDate, @Param("endDate") LocalDate endDate)

这将导致以下查询：

select sum(expense_amount) from budgetreferee.br_expense 
where household_id=1 and next_due_date between str_to_date
 ('2018-08-01','%Y- %m-%d') 
   and str_to_date('2019-07-31','%Y-%m-%d') and 
    category_id IN(41,51,58,70,74,83,94,2,20,10,9,22,28) OR is_bill=TRUE 
  and expense_id IS NOT NULL;

结果为109871.00

如何解决此差异？从Java执行时，我希望将58171.00作为输出。

Answer 1

JPA 2.1在Java 8之前发布，这就是默认情况下不支持LocalDate的原因。您可以使用Converter为您完成这项工作。

import java.sql.Date;
import java.time.LocalDate;
import javax.persistence.AttributeConverter;
import javax.persistence.Converter;

 @Converter(autoApply = true)
 public class LocalDateAttributeConverter implements AttributeConverter<LocalDate, Date> {

  @Override
  public Date convertToDatabaseColumn(LocalDate localDate) {
      return (localDate == null ? null : Date.valueOf(localDate));
  }

  @Override
  public LocalDate convertToEntityAttribute(Date sqlDate) {
      return (sqlDate == null ? null : sqlDate.toLocalDate());
  }

}

MySQL LocalDate在JPA本机查询中以字符串形式传递

1 个答案: