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Jsp passing parameter to jrxml show pdf have some problem


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I want pass parameter to jrxml

when I pass to , I alway get empty pdf.

and haven't any error message

So I don't know where have problem and how to fix it

But if  I don't pass after  and use sql command  it's can work

I guess maybe is pass to jrxml after sql research conditon have error.

it's my show.jsp

Map Parameter = new HashMap();  
JasperReport jasperReport = JasperCompileManager.compileReport(input);
JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, Parameter, conn);
and this my jrxml
<parameter name="ID" class="java.lang.String" ></parameter>
<![CDATA[select * from person where ID = '$P!{ID}']]>
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