ReportExecutionRequest request = new ReportExecutionRequest();

    ReportParameter parameter2 = new ReportParameter();

    parameter2.setName("EXCEPTION_CATEGORY_DESC_EN");

    List<String> values2 = new ArrayList<String>();

   values2.add("1");
   values2.add("3");
   values2.add("4");
   values2.add("10");

   parameter2.setValues(values2);


    ReportParameters parameters = new ReportParameters();
    List<ReportParameter> reportParameters = new ArrayList<ReportParameter>();

    reportParameters.add(parameter2);
    parameters.setReportParameters(reportParameters);`

<parameter name="EXCEPTION_CATEGORY_ID" class="java.util.Collection">

</parameter>

<variable name="CatId" class="java.util.Collection">
    <variableExpression><![CDATA[$P{Report_Title}.split(",")]]></variableExpression>
</variable>