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：
