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如何使用Jasper導(dǎo)出用戶列表數(shù)據(jù)？

更新時(shí)間:2020-07-22 來源:黑馬程序員 瀏覽量:

場景說明

在使用Jasper+jaspersoftStudio導(dǎo)出用戶列表數(shù)據(jù)導(dǎo)出(如下圖)是比較簡單的，就是把用戶列表數(shù)據(jù)，一個(gè)List集合放到 JRBeanCollectionDataSource中即可。

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但是如果有多個(gè)List集合需要導(dǎo)出呢，這個(gè)應(yīng)該怎么辦?比如：一個(gè)用戶的集合List，還有一個(gè)統(tǒng)計(jì)報(bào)表(也需要一個(gè)List集合數(shù)據(jù))

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實(shí)現(xiàn)思路

需要用到子數(shù)據(jù)集，如果多出幾個(gè)List,就創(chuàng)建多少個(gè)子數(shù)據(jù)集Dataset

·動(dòng)手實(shí)現(xiàn)

·制作模板

第一步：新建一個(gè)Jasper Report模板，選擇 Blank A4 (A4紙大小的模板)，然后 Next 命名為userList.jrxml.

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第二步：刪除無用的Band，只留 Title 、Colunn Header、Detail、Summary

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第三步：創(chuàng)建Filed和parameter

①、創(chuàng)建Filed，這幾個(gè)Field用來導(dǎo)出用戶列表的

Jasper+jaspersoftStudio06

②、創(chuàng)建parameter，名稱是chartList，指定類型是ArrayList，這個(gè)參數(shù)是用來放圖表中所需數(shù)據(jù)的

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第四步：創(chuàng)建子數(shù)據(jù)集

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第五步：在模板上拖拽用戶列表數(shù)據(jù)，注意指定中文名稱

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第六步：在模板上拖拽圖表

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注意：我這里的是否顯示圖例改成了false,不然導(dǎo)出會(huì)失敗

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代碼導(dǎo)出

準(zhǔn)備兩個(gè)實(shí)體類：

用來導(dǎo)出用戶列表

package com.itheima.pojo;
import lombok.Data;
/**
 * 員工
 */
@Data
public class People {
    private Long id;
    private String userName; //員工名
    private String phone;    //手機(jī)號(hào)
    private String province; //省份名
    private String hireDateStr; // 入職日期
    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;
    }
}


用來導(dǎo)出圖表

package com.itheima.pojo;
import lombok.Data;
@Data
public class PeopleCount {
    private String provinceName; //省份名
    private Integer count; //數(shù)量
    public PeopleCount(String provinceName, Integer count) {
        this.provinceName = provinceName;
        this.count = count;
    }
}

代碼實(shí)現(xiàn)PDF導(dǎo)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、獲取模板文件
        String templateFile = "d://userList.jasper";
        //       2、準(zhǔn)備數(shù)據(jù)
        //          2.1 列表數(shù)據(jù)
        JRBeanCollectionDataSource dataSource = new JRBeanCollectionDataSource(getListData());
        //         2.2圖表數(shù)據(jù)
        Map params = new HashMap();
        params.put("chartList",getChartListData());
        JasperPrint jasperPrint = JasperFillManager.fillReport(new FileInputStream(templateFile), params,dataSource);
        JasperExportManager.exportReportToPdfStream(jasperPrint,new FileOutputStream("d://用戶列表數(shù)據(jù).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, "張三","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, "趙六","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","山東省","2009-03-09"));
        peopleList.add(new People(10L, "石十","13800000010","山東省","2010-07-10"));
        peopleList.add(new People(11L, "肖十一","13800000011", "山東省","2011-12-11"));
        peopleList.add(new People(12L, "星十二","13800000012", "山東省","2012-05-12"));
        peopleList.add(new People(13L, "釵十三","13800000013", "山東省","2013-06-13"));
        peopleList.add(new People(14L, "賈十四","13800000014", "山東省","2014-06-14"));
        peopleList.add(new People(15L, "甄世武","13800000015", "山東省","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("山東省",220));
        peopleCountList.add(new PeopleCount("河南省",230));
        return peopleCountList;
    }
}

效果如下：

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