CODEWITHSUNDEEP
javajasper-reports
Shefferf
Shefferf

Reputation: 41

Error in loading object from InputStream in java while trying to open a jasper report

I have a subreport which I have used in my main jasper report, I am sending the subreport from a java form using an InputStream, this is the code:

InputStream suprepo = getClass().getResourceAsStream("LinuxTest_subreport1.jasper");

And in the main report I have create a parameter that's class is InputStream, and accepting the value from my java form that I'm passing using a hashmap. My problem is that everything works fine when there is only 1 page, but as soon as there is more then one page I receive this error:

error in loading object from input stream

This is my jasper code

<parameter name="subrepopath" class="java.io.InputStream" isForPrompting="false"/>

Upvotes: 4

Views: 21587

Answers (2)

Carlos UCR
Carlos UCR

Reputation: 359

I had the same issue, and it was caused by a subreport (.jasper) compiled with other version of the Jasper Report.

Upvotes: 3

Draken
Draken

Reputation: 3189

I also suffered from this issue and just recently found the solution thanks to this post.

What you need to do is change your subreport type to Object:

<parameter name="subrepopath" class="java.lang.Object" isForPrompting="false"/>

In your SubReport properties, set the Expression class to be:

net.sf.jasperreports.engine.JasperReport

Changing report type

In your code, you need to load the object into a JasperReport object, this is where I differ from the linked page as the methods used are deprecated.

So you would do:

InputStream suprepo = getClass().getResourceAsStream("LinuxTest_subreport1.jasper");
JasperReport subJasperReport = (JasperReport)JRLoader.loadObject(suprepo);

Then add in your parameter map the object subJasperReport with the key of subrepopath and you'll find your multi page report will now generate correctly.

Upvotes: 0

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