you can use JRBeanArrayDataSource or JRBeanCollectionDataSource
that contain POJO,

for example:
JRBeanCollectionDataSource dataSource;
List reportData = ...;
dataSource = new JRBeanCollectionDataSource(reportData);

by passing this datasource to report,
Jasper evaluate POJO properties with report  fields based on name,
and put proper value (from pojo) to proper field on report.

You must pass your ArrayList of object to jasper  as a JRBeanCollectionDataSource:

JRBeanCollectionDataSource ds = new JRBeanCollectionDataSource(list);
jasperPrint = JasperFillManager.fillReport(jr, reportParameters, ds);

Then in the JasperReport you refer to the object’s properties or methods, in an OGNL type manner. For example, to access the name property of an employee object within list objects, use:

employee.name

OR to reference a property called name within the list objects:

name