PDF多数据源导出

场景说明

在使用Jasper+jaspersoftStudio导出用户列表数据导出（如下图）是比较简单的，就是把用户列表数据，一个List集合放到 JRBeanCollectionDataSource中即可。

但是如果有多个List集合需要导出呢，这个应该怎么办？比如：一个用户的集合List，还有一个统计报表（也需要一个List集合数据）

实现思路

需要用到子数据集，如果多出几个List,就创建多少个子数据集Dataset

动手实现

制作模板

第一步：新建一个Jasper Report模板，选择 Blank A4 (A4纸大小的模板)，然后 Next 命名为userList.jrxml.

第二步：删除无用的Band，只留 Title 、Colunn Header、Detail、Summary

第三步：创建Filed和parameter

①、创建Filed，这几个Field用来导出用户列表的

②、创建parameter，名称是chartList，指定类型是ArrayList，这个参数是用来放图表中所需数据的

第四步：创建子数据集

第五步：在模板上拖拽用户列表数据，注意指定中文名称

第六步：在模板上拖拽图表

注意：我这里的是否显示图例改成了false,不然导出会失败

代码导出

准备两个实体类：

用来导出用户列表

package com.itheima.pojo;
import lombok.Data;
/**
 * 员工
 */
@Data
public class People {
    private Long id;
    private String userName; //员工名
    private String phone;    //手机号
    private String province; //省份名
    private String hireDateStr; // 入职日期
    public People(Long id, String userName, String phone, String province, String hireDateStr) {
        this.id = id;
        this.userName = userName;
        this.phone = phone;
        this.province = province;
        this.hireDateStr = hireDateStr;
    }
}

用来导出图表

package com.itheima.pojo;
import lombok.Data;
@Data
public class PeopleCount {
    private String provinceName; //省份名
    private Integer count; //数量

    public PeopleCount(String provinceName, Integer count) {
        this.provinceName = provinceName;
        this.count = count;
    }
}

代码实现PDF导出

package com.itheima.test;
import com.itheima.pojo.People;
import com.itheima.pojo.PeopleCount;
import net.sf.jasperreports.engine.JasperExportManager;
import net.sf.jasperreports.engine.JasperFillManager;
import net.sf.jasperreports.engine.JasperPrint;
import net.sf.jasperreports.engine.data.JRBeanCollectionDataSource;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.*;

public class PdfDemo {

    public static  void main(String[] args) throws Exception{
        //        1、获取模板文件
        String templateFile = "d://userList.jasper";
        //       2、准备数据
        //          2.1 列表数据
        JRBeanCollectionDataSource dataSource = new JRBeanCollectionDataSource(getListData());
        //         2.2图表数据
        Map params = new HashMap();
        params.put("chartList",getChartListData());
        JasperPrint jasperPrint = JasperFillManager.fillReport(new FileInputStream(templateFile), params,dataSource);
        JasperExportManager.exportReportToPdfStream(jasperPrint,new FileOutputStream("d://用户列表数据.pdf"));
    }

    public static List<People> getListData(){
        List<People> peopleList = new ArrayList<>();
        peopleList.add(new People(1L,   "大一","13800000001","北京市","2001-01-01"));
        peopleList.add(new People(2L,   "不二","13800000002","河北省","2002-01-02"));
        peopleList.add(new People(3L,   "张三","13800000003","河北省","2003-03-03"));
        peopleList.add(new People(4L,   "李四","13800000004","河北省","2004-02-04"));
        peopleList.add(new People(5L,   "王五","13800000005","河北省","2005-03-05"));
        peopleList.add(new People(6L,   "赵六","13800000006","河北省","2006-04-06"));
        peopleList.add(new People(7L,   "沈七","13800000007","河北省","2007-06-07"));
        peopleList.add(new People(8L,   "酒八","13800000008","河北省","2008-07-08"));
        peopleList.add(new People(9L,   "第九","13800000009","山东省","2009-03-09"));
        peopleList.add(new People(10L,  "石十","13800000010","山东省","2010-07-10"));
        peopleList.add(new People(11L,  "肖十一","13800000011",    "山东省","2011-12-11"));
        peopleList.add(new People(12L,  "星十二","13800000012",    "山东省","2012-05-12"));
        peopleList.add(new People(13L,  "钗十三","13800000013",    "山东省","2013-06-13"));
        peopleList.add(new People(14L,  "贾十四","13800000014",    "山东省","2014-06-14"));
        peopleList.add(new People(15L,  "甄世武","13800000015",    "山东省","2015-06-15"));
        return peopleList;
    }


    public static List<PeopleCount> getChartListData(){
        List<PeopleCount> peopleCountList = new ArrayList<>();
        peopleCountList.add(new PeopleCount("北京市",100));
        peopleCountList.add(new PeopleCount("河北省",200));
        peopleCountList.add(new PeopleCount("山东省",220));
        peopleCountList.add(new PeopleCount("河南省",230));
        return peopleCountList;
    }
}

效果如下：