如何在Jasper Reports中动态添加多个数据

问题描述

我有一个贾斯珀报告，我正在使用Java。

I have a Jasper Report I am working on in Java.

在Java中，我可以使用以下代码动态填充带有数据的bean：

In Java I can dynamically populate a bean with data with the following code:

    List<ThemeBean> themes = new ArrayList<ThemeBean>();
    CSVReader csvReader = new CSVReader(new FileReader(csvFilename));
    List<String[]> data = csvReader.readAll();
    for(String[] d : data) {
        ThemeBean tb = new ThemeBean();
        tb.setThemes(d[0]);
        tb.setComments(d[1]);
        tb.setSentiment(d[2]);
        themes.add(tb);
    }
        JasperDesign jasperDesign = JRXmlLoader.load(fileName);
        JRBeanCollectionDataSource ds = new JRBeanCollectionDataSource(themes);
        JasperReport jasperReport = JasperCompileManager.compileReport(jasperDesign);
        JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, null, ds);

当.jrxml文件在标签中指定了正确的字段和textFieldExpression时，这种方法很有效...

This works well when the .jrxml file has the correct fields specified and textFieldExpression within the tags...

以下内容通过构建的List动态填充：

The following gets dynamically populated with the List that was built:

<textFieldExpression><![CDATA[$F{themes}]]></textFieldExpression>

我的问题是如何动态地为同一报告中的两个不同的表执行此操作。似乎我只能用于动态添加一次迭代的数据。我试图实现一个结果，我在同一个报告中生成了两个完全不同的表。如果这个问题不明确，请告诉我，我会尝试修复它。谢谢。

My problem is figuring out how to do this Dynamically for two different tables in the same report. It seems that I can only use for one iteration of data to be dynamically added. I am trying to achieve a result where I have two completely different tables generated within the same report. If this question isn't clear, please let me know and I will attempt to fix it. Thanks.

推荐答案

Jasper ideology：一个报告 - 一个DataSource。

Jasper ideology: one report - one DataSource.

在主报表中使用2子报表。 Main.jrxml包含subreport1（用于显示列表）和subreport2（用于List）。 Subreport1和Subreport2放入标题（或摘要）区域。

Use 2 subreport in main report. Main.jrxml contains subreport1 (for display List) and subreport2 (for List). Subreport1 and Subreport2 put into Title (or Summary) band.

在Main.jrxml中定义参数：themesPar，anotherPar as java.util.Collection

Define parameters in Main.jrxml : themesPar, anotherPar as java.util.Collection

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