java - 将参数传递给 Jasper Reports 时出现的问题

Question

我正在尝试将 2 个参数传递到 Jasper 报告中并获取结果。在 SQL 查询中，我将它们与查询结合起来，如下所示。

SELECT 
ROUND(SUM(case when Updated_Date BETWEEN $P{secondYear}+"-03-01" AND $P{secondYear}+"-03-31" then Amount else 0 end),2) AS `March` ,
ROUND(SUM(case when Updated_Date BETWEEN $P{secondYear}+"-02-01" AND $P{secondYear}+"-02-29" then Amount else 0 end),2) AS `February` ,
ROUND(SUM(case when Updated_Date BETWEEN $P{secondYear}+"-01-01" AND $P{secondYear}+"-01-31" then Amount else 0 end),2) AS `January` ,
ROUND(SUM(case when Updated_Date BETWEEN $P{firstYear}+"-12-01" AND $P{firstYear}+"-12-31" then Amount else 0 end),2) AS `December` ,
ROUND(SUM(case when Updated_Date BETWEEN $P{firstYear}+"-11-01" AND $P{firstYear}+"-11-31" then Amount else 0 end),2) AS `November` ,
ROUND(SUM(case when Updated_Date BETWEEN $P{firstYear}+"-10-01" AND $P{firstYear}+"-10-31" then Amount else 0 end),2) AS `October` ,
ROUND(SUM(case when Updated_Date BETWEEN $P{firstYear}+"-09-01" AND $P{firstYear}+"-09-31" then Amount else 0 end),2) AS `September` ,
ROUND(SUM(case when Updated_Date BETWEEN $P{firstYear}+"-08-01" AND $P{firstYear}+"-08-31" then Amount else 0 end),2) AS `August` ,
ROUND(SUM(case when Updated_Date BETWEEN $P{firstYear}+"-07-01" AND $P{firstYear}+"-07-31" then Amount else 0 end),2) AS `July` ,
ROUND(SUM(case when Updated_Date BETWEEN $P{firstYear}+"-06-01" AND $P{firstYear}+"-06-31" then Amount else 0 end),2) AS `June`, 
ROUND(SUM(case when Updated_Date BETWEEN $P{firstYear}+"-05-01" AND $P{firstYear}+"-05-31" then Amount else 0 end),2) AS `May`,
ROUND(SUM(case when Updated_Date BETWEEN $P{firstYear}+"-04-01" AND $P{firstYear}+"-04-31" then Amount else 0 end),2) AS `April` 
FROM VAT

但是，在我的 Jasper 报告中，我得到的所有月份、所有时间的增值税都是 0。我做错了什么？

Answer 1

我找到了答案。在 jasper 报告中，如果您想在 SQL 查询中组合 参数(例如 String)，则不应使用 + 符号。所以正确的代码如下。

SELECT 
ROUND(SUM(case when Updated_Date BETWEEN $P{secondYear}"-03-01" AND $P{secondYear}"-03-31" then Amount else 0 end),2) AS `March` ,
ROUND(SUM(case when Updated_Date BETWEEN $P{secondYear}"-02-01" AND $P{secondYear}"-02-29" then Amount else 0 end),2) AS `February` ,
ROUND(SUM(case when Updated_Date BETWEEN $P{secondYear}"-01-01" AND $P{secondYear}"-01-31" then Amount else 0 end),2) AS `January` ,
ROUND(SUM(case when Updated_Date BETWEEN $P{firstYear}"-12-01" AND $P{firstYear}"-12-31" then Amount else 0 end),2) AS `December` ,
ROUND(SUM(case when Updated_Date BETWEEN $P{firstYear}"-11-01" AND $P{firstYear}"-11-31" then Amount else 0 end),2) AS `November` ,
ROUND(SUM(case when Updated_Date BETWEEN $P{firstYear}"-10-01" AND $P{firstYear}"-10-31" then Amount else 0 end),2) AS `October` ,
ROUND(SUM(case when Updated_Date BETWEEN $P{firstYear}"-09-01" AND $P{firstYear}"-09-31" then Amount else 0 end),2) AS `September` ,
ROUND(SUM(case when Updated_Date BETWEEN $P{firstYear}"-08-01" AND $P{firstYear}"-08-31" then Amount else 0 end),2) AS `August` ,
ROUND(SUM(case when Updated_Date BETWEEN $P{firstYear}"-07-01" AND $P{firstYear}"-07-31" then Amount else 0 end),2) AS `July` ,
ROUND(SUM(case when Updated_Date BETWEEN $P{firstYear}"-06-01" AND $P{firstYear}"-06-31" then Amount else 0 end),2) AS `June`, 
ROUND(SUM(case when Updated_Date BETWEEN $P{firstYear}"-05-01" AND $P{firstYear}"-05-31" then Amount else 0 end),2) AS `May`,
ROUND(SUM(case when Updated_Date BETWEEN $P{firstYear}"-04-01" AND $P{firstYear}"-04-31" then Amount else 0 end),2) AS `April` 
FROM VAT

如果您使用 Jaspersoft Studio，它会在查询编辑器中将此显示为错误。不过，它的工作没有任何问题。