如何将JRBeanCollectionDataSource的List传递给子报表

Question

我正在从JRBeanCollectionDataSource生成报告.此报告是关于客户的订单.

这是我的代码

public class Customer
{
    private String customerName;
    private String customerNo;
    private String customerAddress;
    private ArrayList<CustomerOrder> customerOrders;
    //Getters and Setters
}


private class CustomerOrder
{
    private String itemName;
    private BigDecimal amount;
    private int itemQuantity;
    //Getters and Setters
}

当客户需要生成包含客户详细信息和客户订单列表的报告时.自从JRBeanCollectionDataSource收集,这就是我做的.

Customer cust; //Customer Instance

ArrayList<Customer> custList = new ArrayList<Customer>();
custList.add(cust); 

JRBeanCollectionDataSource rptData = new JRBeanCollectionDataSource(custList);

如何提取CustomerOrder列表Customer并将其作为子报表传递？

Answer 1

您应该能够为子报表设置数据源表达式:

new net.sf.jasperreports.engine.data.JRBeanCollectionDataSource($F{customerOrders})

生成的xml应该有一个类似于的子报表标记:

<subreport>
    <reportElement uuid="e9fc4a60-3844-41b7-a38c-768f06f09b44" x="0" y="57" width="555" height="68"/>
    <dataSourceExpression><![CDATA[new net.sf.jasperreports.engine.data.JRBeanCollectionDataSource($F{customerOrders})]]></dataSourceExpression>
    <subreportExpression><![CDATA[$P{SUBREPORT_DIR} + "report2_subreport1.jasper"]]></subreportExpression>
</subreport>

您需要检查的唯一其他事情是Language报告属性设置为Java.