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Java大批量导出Excel数据的优化过程

2021-11-24 13:02资深研发、架构师 Java教程

几十万上百万行的数据是很常见的。本文主要介绍了Java大批量导出Excel数据的优化过程,文中通过示例代码介绍的非常详细,具有一定的参考价值,感兴趣的小伙伴们可以参考一下

背景

团队目前在做一个用户数据看板(下面简称看板),基本覆盖用户的所有行为数据,并生成分析报表,用户行为由多个数据来源组成(餐饮、生活日用、充值消费、交通出行、通讯物流、交通出行、医疗保健、住房物业、运动健康...),

基于大量数据的组合、排序和统计。根据最新的统计报告,每天将近100W+的行为数据产生,所以这个数据基数是非常大的。

而这个数据中心,对接很多的业务团队,这些团队根据自己的需要,对某些维度进行筛选,然后直接从我们的中心上下载数据(excel)文档进行分析。所以下个几十万上百万行的数据是很常见的。

问题和解决方案

遇到的问题

目前遇到的主要问题是,随着行为能力逐渐的完善闭环,用户数据沉淀的也越来越多了,同时业务量的也在不断扩大。

业务团队有时候会下载超量的数据来进行分析,平台上的数据下载能力就显得尤为重要了。而我们的问题是下载效率太慢,10W的数据大约要5分钟以上才能下载下来,这显然有问题了。

解决步骤

代码是之前团队遗留的,原先功能没开放使用,没有数据量,所以没有发现问题。以下是原来的导出模块,原程序如下,我做了基本还原。

现在如何保证数据的高效导出是我们最重要的目标,这个也是业务团队最关心的。

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/**
     * 获取导出的Excel的文件流信息
     * @param exportData
     * @return
     * @throws Exception
     */
    private OutputStream getExportOutPutStream(List<UBehavDto> exportData) throws Exception {
        JSONObject object = new JSONObject();
        List<ExcelCell[]> excelCells = new ArrayList<>();
        String[] headers = new String[] { "A字段","B字段","C字段","D","E","F","G","H","I","J","K","L",
                "M","N","O","P","Q","R","S","T","U","V","W",
                "X","Y","Z","AA","AB","AC","AD","AE字段","AF字段","AG字段" };
        ExcelCell[] headerRow = getHeaderRow(headers);
        excelCells.add(headerRow);
        String pattern = "yyyy-MM-dd hh:mm:ss";
        for (UBehavDto uBehavDto:exportData) {
            String[] singleRow = new String[] { uBehavDto.getA(),uBehavDto.getB(),uBehavDto.getC(),uBehavDto.getD(),uBehavDto.getE(),uBehavDto.getF(),
                    DateFormatUtils.format(uBehavDto.getAddTime(), pattern),DateFormatUtils.format(uBehavDto.getDate(), pattern),
                    uBehavDto.getG(),uBehavDto.getH(),uBehavDto.getI(),uBehavDto.getJ(),uBehavDto.getK(),uBehavDto.getL(),uBehavDto.getM(),
                    uBehavDto.getN(),uBehavDto.getO(),uBehavDto.getP(),
                    uBehavDto.getQ(),uBehavDto.getR(),uBehavDto.getS(),String.valueOf(uBehavDto.getT()),uBehavDto.getMemo(),uBehavDto.getU(),uBehavDto.getV(),
                    uBehavDto.getW(),uBehavDto.getX(),
                    uBehavDto.getY(),uBehavDto.getZ(),uBehavDto.getAA(),uBehavDto.getAB(),uBehavDto.getAC() };
            ExcelCell[] cells = new ExcelCell[singleRow.length];
            ExcelCell getA=new ExcelCell();getA.setValue(uBehavDto.getA());
            ExcelCell getB=new ExcelCell();getB.setValue(uBehavDto.getB());
            ExcelCell getC=new ExcelCell();getC.setValue(uBehavDto.getC());
            ExcelCell getD=new ExcelCell();getD.setValue(uBehavDto.getD());
            ExcelCell getE=new ExcelCell();getE.setValue(uBehavDto.getE());
            ExcelCell getF=new ExcelCell();getF.setValue(uBehavDto.getF());
            ExcelCell getAddTime=new ExcelCell();getAddTime.setValue(DateFormatUtils.format(uBehavDto.getAddTime(), pattern));
            ExcelCell getDate=new ExcelCell();getDate.setValue(DateFormatUtils.format(uBehavDto.getDate(), pattern));
            ExcelCell getG=new ExcelCell();getG.setValue(uBehavDto.getG());
            ExcelCell getH=new ExcelCell();getH.setValue(uBehavDto.getH());
            ExcelCell getI=new ExcelCell();getI.setValue(uBehavDto.getI());
            ExcelCell getJ=new ExcelCell();getJ.setValue(uBehavDto.getJ());
            ExcelCell a=new ExcelCell();a.setValue(uBehavDto.getK());
            ExcelCell a=new ExcelCell();a.setValue(uBehavDto.getL());
            ExcelCell a=new ExcelCell();a.setValue(uBehavDto.getM());
            ExcelCell a=new ExcelCell();a.setValue(uBehavDto.getN());
            ExcelCell a=new ExcelCell();a.setValue(uBehavDto.getO());
            ExcelCell a=new ExcelCell();a.setValue(uBehavDto.getP());
            ExcelCell a=new ExcelCell();a.setValue(uBehavDto.getQ());
            ExcelCell a=new ExcelCell();a.setValue(uBehavDto.getR());
            ExcelCell a=new ExcelCell();a.setValue(uBehavDto.getS());
            ExcelCell a=new ExcelCell();a.setValue(String.valueOf(uBehavDto.getT()));
            ExcelCell a=new ExcelCell();a.setValue(uBehavDto.getMemo());
            ExcelCell a=new ExcelCell();a.setValue(uBehavDto.getU());
            ExcelCell a=new ExcelCell();a.setValue(uBehavDto.getV());
            ExcelCell a=new ExcelCell();a.setValue(uBehavDto.getW());
            ExcelCell a=new ExcelCell();a.setValue(uBehavDto.getX());
            ExcelCell a=new ExcelCell();a.setValue(uBehavDto.getY());
            ExcelCell a=new ExcelCell();a.setValue(uBehavDto.getZ());
            ExcelCell a=new ExcelCell();a.setValue(uBehavDto.getAA());
            ExcelCell a=new ExcelCell();a.setValue(uBehavDto.getAB());
            ExcelCell a=new ExcelCell();a.setValue(uBehavDto.getAC());
            ExcelCell[] cells = {
                    new ExcelCell(uBehavDto.getA()),
                    new ExcelCell().setValue(uBehavDto.getB()),
                    new ExcelCell().setValue(uBehavDto.getC()),
                    new ExcelCell().setValue(uBehavDto.getD()),
                    new ExcelCell().setValue(uBehavDto.getE()),
                    new ExcelCell().setValue(uBehavDto.getF()),
                    new ExcelCell().setValue(DateFormatUtils.format(uBehavDto.getAddTime(), pattern)),
                    new ExcelCell().setValue(DateFormatUtils.format(uBehavDto.getDate(), pattern)),
                    new ExcelCell().setValue(uBehavDto.getG()),
                    new ExcelCell().setValue(uBehavDto.getH()),
                    new ExcelCell().setValue(uBehavDto.getI()),
                    new ExcelCell().setValue(uBehavDto.getJ()),
                    new ExcelCell().setValue(uBehavDto.getK()),
                    new ExcelCell().setValue(uBehavDto.getL()),
                    new ExcelCell().setValue(uBehavDto.getM()),
                    new ExcelCell().setValue(uBehavDto.getN()),
                    new ExcelCell().setValue(uBehavDto.getO()),
                    new ExcelCell().setValue(uBehavDto.getP()),
                    new ExcelCell().setValue(uBehavDto.getQ()),
                    new ExcelCell().setValue(uBehavDto.getR()),
                    new ExcelCell().setValue(uBehavDto.getS()),
                    new ExcelCell().setValue(String.valueOf(uBehavDto.getT())),
                    new ExcelCell().setValue(uBehavDto.getMemo()),
                    new ExcelCell().setValue(uBehavDto.getU()),
                    new ExcelCell().setValue(uBehavDto.getV()),
                    new ExcelCell().setValue(uBehavDto.getW()),
                    new ExcelCell().setValue(uBehavDto.getX()),
                    new ExcelCell().setValue(uBehavDto.getY()),
                    new ExcelCell().setValue(uBehavDto.getZ()),
                    new ExcelCell().setValue(uBehavDto.getAA()),
                    new ExcelCell().setValue(uBehavDto.getAB()),
                    new ExcelCell().setValue(uBehavDto.getAC())
            };
 
            for(int idx=0;idx<singleRow.length;idx++) {
                ExcelCell cell = new ExcelCell();
                cell.setValue(singleRow[idx]);
                cells[idx] = cell;
            }
            excelCells.add(cells);
        }
        object.put("行为数据", excelCells);
        ExcelUtils utils = new ExcelUtils();
        OutputStream outputStream = utils.writeExcel(object);
        return outputStream;
    }

看看标红的代码,这个生成Excel的方式是对Excel中的每一个cell进行渲染,逐行的进行数据填充,效率太慢了,根据日志分析发现:基本时间都耗费在数据生成Excel上。每生成1W左右的数据基本

消耗1分钟的时间。原来在其他业务中他只是作为简量数据导出来使用,比如几百条的数据,很快就出来了,但是遇到大量数据导出的情况,性能问题就立马现形了。

团队内讨论了一下并参考了资料,发现原来业内有很多好用强大的Excel处理组件,我们优先选用阿里的easy excel来做一下尝试。

Pom添加 easyexcel 如下:

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<dependency>
     <groupId>com.alibaba</groupId>
     <artifactId>easyexcel</artifactId>
     <version>2.1.4</version>
</dependency>

代码:dto内容(中文为配置好的表头):

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package com.xxx.xxx.modules.worklog.dto;
 
import com.alibaba.excel.annotation.ExcelProperty;
import lombok.Getter;
import lombok.Setter;
import java.io.Serializable;
import java.util.Date;
 
/**
 * <p>Description:XX表基本信息 </p>
 * <p>Copyright: Copyright (c) 2021  </p>
 * <p>Company: XX Co., Ltd.             </p>
 *
 * @author brand
 * @date 2021-06-26 10:07:46
 * <p>Update Time:                      </p>
 * <p>Updater:                          </p>
 * <p>Update Comments:                  </p>
 */
@Setter
@Getter
public class WorkLogDto implements Serializable {
    private static final long serialVersionUID = -5523294561640180605L;
    @ExcelProperty("A字段")
    private String aClolumn;
    @ExcelProperty("B字段")
    private String BColumn;
    @ExcelProperty("C字段")
    private String cColumn;
    @ExcelProperty("D字段")
    private String dColumn;
    @ExcelProperty("E字段")
    private String eColumn;
    @ExcelProperty("F字段")
    private String fColumn;
    @ExcelProperty("G字段")
    private Date gColumn;
    @ExcelProperty("H字段")
    private Date hColumn;
    @ExcelProperty("I字段")
    private String iColumn;
    @ExcelProperty("J字段")
    private String jColumn;
    @ExcelProperty("K字段")
    private String kColumn;
    @ExcelProperty("L字段")
    private String lColumn;
    @ExcelProperty("M字段")
    private String mColumn;
    @ExcelProperty("N字段")
    private String nColumn;
    @ExcelProperty("O字段")
    private String oColumn;
    @ExcelProperty("P字段")
    private String pColumn;
    @ExcelProperty("Q字段")
    private String qColumn;
    @ExcelProperty("R字段")
    private String rColumn;
    @ExcelProperty("S字段")
    private String sColumn;
    @ExcelProperty("T字段")
    private String tColumn;
    @ExcelProperty("U字段")
    private String uColumn;
    @ExcelProperty("V字段")
    private double vColumn;
    @ExcelProperty("W字段")
    private String wColumn;
    @ExcelProperty("X字段")
    private String xClumn;
    @ExcelProperty("Y字段")
    private String yColumn;
    @ExcelProperty("Z字段")
    private String zColumn;
}

生成文件流的步骤(代码很清晰了):

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/**
     * EasyExcel 生成文件流
     * @param exportData
     * @return
     */
    private byte[] getEasyExcelOutPutStream(List<WorkLogDto> exportData) {
        try {
            WriteCellStyle headWriteCellStyle = new WriteCellStyle();
            WriteCellStyle contentWriteCellStyle = new WriteCellStyle();
            contentWriteCellStyle.setWrapped(true);
            HorizontalCellStyleStrategy horizontalCellStyleStrategy = new HorizontalCellStyleStrategy(headWriteCellStyle, contentWriteCellStyle);
            ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
            EasyExcel.write(outputStream, WorkLogDto.class).sheet("行为业务数据") //  Sheet名称
                    .registerWriteHandler(new LongestMatchColumnWidthStyleStrategy())
                    .registerWriteHandler(horizontalCellStyleStrategy)
                    .doWrite(exportData);
            byte[] bytes = outputStream.toByteArray();
            // 关闭流
            outputStream.close();
            return bytes;
        }
        catch (Exception ex) {
            log.error("输出Excel文件流失败:"+ex.getMessage());
            return null;
        }
    }

完整生成Excel文件流并上传:

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/**
     * 上传用户数据报表
     * @param prmWorkLogExport
     * @param order
     * @param orderType
     * @return
     */
    @Override
    @Async
    public Object uploadWorkLogData(PrmWorkLogExport prmWorkLogExport,ExportTaskDomain domain, String order, String orderType,String suid) {
        try {
            log.info(String.format("ExportWorkLog->:%s", "开始获取数据"));
            List<WorkLogDto> logList = getLogList(prmWorkLogExport,order,orderType);
            log.info(String.format("ExportWorkLog->:结束获取数据,总 %d 条数据", logList.size()));
            byte[] bytes = getEasyExcelOutPutStream(logList);
            log.info(String.format("ExportWorkLog->:%s","完成数据转excel文件流"));
            /* 暂时作废 Todo
            int max=55;int min=40;
            Random random = new Random();
            int rd = random.nextInt(max)%(max-min+1) + min;
            modifyExportTask(domain.getId(),0,rd);//计算生成数据的进度
            */
            //开始投递文件集群服务器,并将结果反写到数据库
            log.info(String.format("ExportWorkLog->:%s","开始将数据写入文件服务系统"));
            Dentry dentry = csService.coverUploadByByteArrayByToken(domain, bytes);
            //执行异步记录,以免连接池关闭
            executor.execute(() -> {
                try {
                   asynworkService.finishExportTask(domain.getId(),domain.getFileName(), dentry);
                } catch (Exception e) {
                    log.error("更新任务状态失败:", e.getMessage());
                }
            });
 
        } catch (Exception ex) {
            // 1完成 0进行中 2生产错误
            String updateSql = String.format(" update exporttask set statu=2 where taskid=%s;",domain.getId());
            Query query = entityManager.createNativeQuery(updateSql);
            query.executeUpdate();
            entityManager.flush();
            entityManager.clear();
            log.info(String.format("ExportWorkLog->:上传文件异常:%s",ex.getMessage()));
        }
        return null;
    }

改用阿里 easyexcel 组件后,10W+ 的数据从生成Excel文件流到上传只要8秒,原来约要8分钟 ,以下为各个步骤时间点的日志记录,可以看出时间消耗:

Java大批量导出Excel数据的优化过程

Java大批量导出Excel数据的优化过程

整理工具类

工具类和使用说明

参考网上整理的工具类,有些类、方法在之前的版本是ok的,新版本下被标记为过时了

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package com.nd.helenlyn.common.utils;
 
import com.alibaba.excel.EasyExcelFactory;
import com.alibaba.excel.ExcelWriter;
import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.alibaba.excel.metadata.BaseRowModel;
import com.alibaba.excel.metadata.Sheet;
import lombok.Data;
import lombok.Getter;
import lombok.Setter;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.CollectionUtils;
import org.springframework.util.StringUtils;
 
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
 
/**
 * @author brand
 * @Description:
 * @Copyright: Copyright (c) 2021
 * @Company: XX, Inc. All Rights Reserved.
 * @date 2021/7/10 3:54 下午
 * @Update Time:
 * @Updater:
 * @Update Comments:
 */
@Slf4j
public class EasyExcelUtil {
        private static Sheet initSheet;
        static {
            initSheet = new Sheet(1, 0);
            initSheet.setSheetName("sheet");
            //设置自适应宽度,避免表头重叠情况
            initSheet.setAutoWidth(Boolean.TRUE);
        }
 
        /**
         * 读取少于1000行数据的情况
         * @param filePath 文件存放的绝对路径
         * @return
         */
        public static List<Object> lessThan1000Row(String filePath){
            return lessThan1000RowBySheet(filePath,null);
        }
 
        /**
         * 读小于1000行数据, 带样式
         * filePath 文件存放的绝对路径
         * initSheet :
         *      sheetNo: sheet页码,默认为1
         *      headLineMun: 从第几行开始读取数据,默认为0, 表示从第一行开始读取
         *      clazz: 返回数据List<Object> 中Object的类名
         */
        public static List<Object> lessThan1000RowBySheet(String filePath, Sheet sheet){
            if(!StringUtils.hasText(filePath)){
                return null;
            }
 
            sheet = sheet != null ? sheet : initSheet;
 
            InputStream fileStream = null;
            try {
                fileStream = new FileInputStream(filePath);
                return EasyExcelFactory.read(fileStream, sheet);
            } catch (FileNotFoundException e) {
                log.info("找不到文件或文件路径错误, 文件:{}", filePath);
            }finally {
                try {
                    if(fileStream != null){
                        fileStream.close();
                    }
                } catch (IOException e) {
                    log.info("excel文件读取失败, 失败原因:{}", e);
                }
            }
            return null;
        }
 
        /**
         * 读大于1000行数据
         * @param filePath 文件存放的绝对路径
         * @return
         */
        public static List<Object> mareThan1000Row(String filePath){
            return moreThan1000RowBySheet(filePath,null);
        }
 
        /**
         * 读大于1000行数据, 带样式
         * @param filePath 文件存放的绝对路径
         * @return
         */
        public static List<Object> moreThan1000RowBySheet(String filePath, Sheet sheet){
            if(!StringUtils.hasText(filePath)){
                return null;
            }
 
            sheet = sheet != null ? sheet : initSheet;
 
            InputStream fileStream = null;
            try {
                fileStream = new FileInputStream(filePath);
                ExcelListener excelListener = new ExcelListener();
                EasyExcelFactory.readBySax(fileStream, sheet, excelListener);
                return excelListener.getDatas();
            } catch (FileNotFoundException e) {
                log.error("找不到文件或文件路径错误, 文件:{}", filePath);
            }finally {
                try {
                    if(fileStream != null){
                        fileStream.close();
                    }
                } catch (IOException e) {
                    log.error("excel文件读取失败, 失败原因:{}", e);
                }
            }
            return null;
        }
 
        /**
         * 生成excle
         * @param filePath  绝对路径, 如:/home/{user}/Downloads/123.xlsx
         * @param data 数据源
         * @param head 表头
         */
        public static void writeBySimple(String filePath, List<List<Object>> data, List<String> head){
            writeSimpleBySheet(filePath,data,head,null);
        }
 
        /**
         * 生成excle
         * @param filePath 绝对路径, 如:/home/{user}/Downloads/123.xlsx
         * @param data 数据源
         * @param sheet excle页面样式
         * @param head 表头
         */
        public static void writeSimpleBySheet(String filePath, List<List<Object>> data, List<String> head, Sheet sheet){
            sheet = (sheet != null) ? sheet : initSheet;
 
            if(head != null){
                List<List<String>> list = new ArrayList<>();
                head.forEach(h -> list.add(Collections.singletonList(h)));
                sheet.setHead(list);
            }
 
            OutputStream outputStream = null;
            ExcelWriter writer = null;
            try {
                outputStream = new FileOutputStream(filePath);
                writer = EasyExcelFactory.getWriter(outputStream);
                writer.write1(data,sheet);
            } catch (FileNotFoundException e) {
                log.error("找不到文件或文件路径错误, 文件:{}", filePath);
            }finally {
                try {
                    if(writer != null){
                        writer.finish();
                    }
 
                    if(outputStream != null){
                        outputStream.close();
                    }
 
                } catch (IOException e) {
                    log.error("excel文件导出失败, 失败原因:{}", e);
                }
            }
 
        }
 
        /**
         * 生成excle
         * @param filePath 文件存放的绝对路径, 如:/home/{user}/Downloads/123.xlsx
         * @param data 数据源
         */
        public static void writeWithTemplate(String filePath, List<? extends BaseRowModel> data){
            writeWithTemplateAndSheet(filePath,data,null);
        }
 
        /**
         * 生成excle
         * @param filePath 文件存放的绝对路径, 如:/home/user/Downloads/123.xlsx
         * @param data 数据源
         * @param sheet excle页面样式
         */
        public static void writeWithTemplateAndSheet(String filePath, List<? extends BaseRowModel> data, Sheet sheet){
            if(CollectionUtils.isEmpty(data)){
                return;
            }
 
            sheet = (sheet != null) ? sheet : initSheet;
            sheet.setClazz(data.get(0).getClass());
 
            OutputStream outputStream = null;
            ExcelWriter writer = null;
            try {
                outputStream = new FileOutputStream(filePath);
                writer = EasyExcelFactory.getWriter(outputStream);
                writer.write(data,sheet);
            } catch (FileNotFoundException e) {
                log.error("找不到文件或文件路径错误, 文件:{}", filePath);
            }finally {
                try {
                    if(writer != null){
                        writer.finish();
                    }
 
                    if(outputStream != null){
                        outputStream.close();
                    }
                } catch (IOException e) {
                    log.error("excel文件导出失败, 失败原因:{}", e);
                }
            }
 
        }
 
        /**
         * 生成多Sheet的excle
         * @param filePath 绝对路径, 如:/home/{user}/Downloads/123.xlsx
         * @param multipleSheelPropetys
         */
        public static void writeWithMultipleSheel(String filePath,List<MultipleSheelPropety> multipleSheelPropetys){
            if(CollectionUtils.isEmpty(multipleSheelPropetys)){
                return;
            }
 
            OutputStream outputStream = null;
            ExcelWriter writer = null;
            try {
                outputStream = new FileOutputStream(filePath);
                writer = EasyExcelFactory.getWriter(outputStream);
                for (MultipleSheelPropety multipleSheelPropety : multipleSheelPropetys) {
                    Sheet sheet = multipleSheelPropety.getSheet() != null ? multipleSheelPropety.getSheet() : initSheet;
                    if(!CollectionUtils.isEmpty(multipleSheelPropety.getData())){
                        sheet.setClazz(multipleSheelPropety.getData().get(0).getClass());
                    }
                    writer.write(multipleSheelPropety.getData(), sheet);
                }
 
            } catch (FileNotFoundException e) {
                log.error("找不到文件或文件路径错误, 文件:{}", filePath);
            }finally {
                try {
                    if(writer != null){
                        writer.finish();
                    }
 
                    if(outputStream != null){
                        outputStream.close();
                    }
                } catch (IOException e) {
                    log.error("excel文件导出失败, 失败原因:{}", e);
                }
            }
 
        }
 
 
        /*********************以下为内部类,可以提取到独立类中******************************/
 
        @Data
        public static class MultipleSheelPropety{
 
            private List<? extends BaseRowModel> data;
 
            private Sheet sheet;
        }
 
        /**
         * 解析监听器,
         * 每解析一行会回调invoke()方法。
         * 整个excel解析结束会执行doAfterAllAnalysed()方法
         *
         * @author: chenmingjian
         * @date: 19-4-3 14:11
         */
        @Getter
        @Setter
        public static class ExcelListener extends AnalysisEventListener {
 
            private List<Object> datas = new ArrayList<>();
 
            /**
             * 逐行解析
             * object : 当前行的数据
             */
            @Override
            public void invoke(Object object, AnalysisContext context) {
                //当前行
                // context.getCurrentRowNum()
                if (object != null) {
                    datas.add(object);
                }
            }
 
 
            /**
             * 解析完所有数据后会调用该方法
             */
            @Override
            public void doAfterAllAnalysed(AnalysisContext context) {
                //解析结束销毁不用的资源
            }
 
        }
}

参考资料

语雀例子文档:https://www.yuque.com/easyexcel/doc/easyexcel
easyexcel GitHub地址:https://github.com/alibaba/easyexcel

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原文链接:https://www.cnblogs.com/wzh2010/p/13528320.html

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