ireport的table组件+java的应用

列表对象：

@Data
public static class Person{
    String id;
    String name;
    String gender;
    String age;
    String address;
}

模式一：

把列表数据list传入报表的paramters中，报表table的数据源表达式再去封装；

java代码：

    private static void printWithParamTest2() throws IOException {
        Map paramMap = new HashMap();
        List<Person> mapDataList = new ArrayList<>();

        // 参数设置
        paramMap.put("conNo", "32166");
        paramMap.put("ccc", "123");

        Person p1 = new Person();
        p1.id = "1";
        p1.name = "li";
        p1.gender = "man";
        p1.age = "10";
        p1.address = "beijing";
        Person p2 = new Person();
        p2.id = "2";
        p2.name = "zh";
        p2.gender = "women";
        p2.age = "13";
        p2.address = "shanghai";
        Person p3= new Person();
        p3.id = "3";
        p3.name = "hua";
        p3.gender = "man";
        p3.age = "16";
        p3.address = "guangdong";
        mapDataList.add(p1);
        mapDataList.add(p2);
        mapDataList.add(p3);

        paramMap.put("list", mapDataList);
        String templatePath = "D:\\doc\\report\\test2.jasper";

        InputStream inputStream = null;
        OutputStream outputStream = null;
        try {
            inputStream = new FileInputStream(templatePath);
            JasperReport template = (JasperReport) JRLoader.loadObject(inputStream);
            byte[] bytes = JasperRunManager.runReportToPdf(template, paramMap, new JREmptyDataSource());
            outputStream = new FileOutputStream("D:\\doc\\report\\test2.pdf");
            outputStream.write(bytes);
        } catch (Exception e){
            e.printStackTrace();
            return;
        } finally {
            if(inputStream != null){
                inputStream.close();
            }
            if(outputStream != null){
                outputStream.close();
            }
        }
    }

ireport设计：

在table的数据源的fields中新建参数并“拖入”进table组件中，table的数据源进行如下图配置，编译运行。

结果：

 

模式二：

模式一是把list作为参数传入，java代码是new了一个空数据源。模式二现在new一个JRBeanCollectionDataSource数据源传入。

在java代码中JRBeanCollectionDataSource需要封装两层，代码如下；

java代码：

    private static void printWithParamTest3() throws IOException {
        Map paramMap = new HashMap();
        List<Person> mapDataList = new ArrayList<>();

        // 参数设置
        paramMap.put("conNo", "32166");
        paramMap.put("ccc", "123");

        Person p1 = new Person();
        p1.id = "1";
        p1.name = "li";
        p1.gender = "man";
        p1.age = "10";
        p1.address = "beijing";
        Person p2 = new Person();
        p2.id = "2";
        p2.name = "zh";
        p2.gender = "women";
        p2.age = "13";
        p2.address = "shanghai";
        Person p3= new Person();
        p3.id = "3";
        p3.name = "hua";
        p3.gender = "man";
        p3.age = "16";
        p3.address = "guangdong";
        mapDataList.add(p1);
        mapDataList.add(p2);
        mapDataList.add(p3);

        String templatePath = "D:\\doc\\report\\test3.jasper";

        InputStream inputStream = null;
        OutputStream outputStream = null;
        try {
            inputStream = new FileInputStream(templatePath);
            JasperReport template = (JasperReport) JRLoader.loadObject(inputStream);
            byte[] bytes;
                // 不能直接将jrDataSource 作为 runReportToPdf 的三个参数，否则会自动过滤第一条数据，暂不清楚原因
                JRDataSource jrDataSource = new JRBeanCollectionDataSource(mapDataList);
                // 使用table组件 需要封装一层才可以
                List<Map<String, Object>> list = new ArrayList<>();
                Map<String, Object> map = new HashMap<>();
                map.put("tableData", jrDataSource);
                list.add(map);
                JRDataSource paramDataSource = new JRBeanCollectionDataSource(list);
                bytes = JasperRunManager.runReportToPdf(template, paramMap, paramDataSource);
            outputStream = new FileOutputStream("D:\\doc\\report\\test3.pdf");
            outputStream.write(bytes);
        } catch (Exception e){
            e.printStackTrace();
            return;
        } finally {
            if(inputStream != null){
                inputStream.close();
            }
            if(outputStream != null){
                outputStream.close();
            }
        }
    }

ireport报表设计：

在报表的fields中 取出列表数据 tableData，然后在table的数据源中配置，然后编译运行。