hutool、esayPoi、easyExcel、读写数据,性能对比

目录

1.源码下载

2、先上结论

3、代码

3.1、实体、接口

3.2、读CSV

3.3、读Excel

3.4、写CSV

3.5、写Excel

3.6、业务示例


1.源码下载

示例源码下载(含模板)

2、先上结论

java 复制代码
注意注意::::导出大文件的时候可能会有临时存储,
我的是在C:\Users\xbx\AppData\Local\Temp\poifiles

读csv文件
行数:1048575
hutool:      5205
esayPoi:     3929
easyExcel1:  1917
easyExcel2:  2832

读excel文件
行数:1048575
hutool:     58207
esayPoi:    25513
easyExce1:  10646
easyExcel2: 10123

写csv文件:
行数:1048575
hutool:     6136
esayPoi:     828
easyExcel1: 6943
easyExcel2: 5212

写excel文件:
行数:1048575
hutool1:  146655
hutool2:   23570
esayPoi1:  21805
esayPoi2:  93034
easyExcel1:20762
easyExcel2:20523
easyExcel3:15386
easyExcel4:14586

3、代码

3.1、实体、接口

java 复制代码
package cn.sdjtky.ltpon.FileTest;

import cn.afterturn.easypoi.excel.annotation.Excel;
import lombok.Data;

/**
 * @version v1.0
 * @ProjectName: ltpon
 * @ClassName: Strainentey
 * @Description:
 * @Author: xbx
 * @Date: 2023/12/8 13:55
 */
@Data
public class DeviceDto {
    //sn+channel
    String sn;
    //与地表距离(m)
    Double surfaceDistance;
    //结构层位
    String structuralLayer;
    //就写电信号
    String channel;
    //这个值就是StressStrainDataDto里面的key 如:"t.v1","t.v2"
    String dataKey;
}
java 复制代码
package cn.sdjtky.ltpon.FileTest;

import cn.hutool.core.annotation.Alias;
import lombok.Data;

/**
 * @version v1.0
 * @ProjectName: ltpon
 * @ClassName: Strainentey
 * @Description:
 * @Author: xbx
 * @Date: 2023/12/8 13:55
 */
@Data
public class StrainEntity {
    @Alias("时间")
    String time;
    @Alias("通道1")
    String v1;
    @Alias("通道2")
    String v2;
    @Alias("通道3")
    String v3;
    @Alias("通道4")
    String v4;
    Double v5;
    Double v6;
    Double v7;
    Double v8;
}
java 复制代码
package cn.sdjtky.ltpon.FileTest;

import cn.afterturn.easypoi.excel.annotation.Excel;
import lombok.Data;

/**
 * @version v1.0
 * @ProjectName: ltpon
 * @ClassName: Strainentey
 * @Description:
 * @Author: xbx
 * @Date: 2023/12/8 13:55
 */
@Data
public class StrainEntity2 {
    @Excel(name = "时间")
    String time;
    @Excel(name = "通道1")
    String v1;
    @Excel(name = "通道2")
    String v2;
    @Excel(name = "通道3")
    String v3;
    @Excel(name = "通道4")
    String v4;
    Double v5;
    Double v6;
    Double v7;
    Double v8;
}
java 复制代码
package cn.sdjtky.ltpon.FileTest;

import com.alibaba.excel.annotation.ExcelProperty;
import lombok.Data;

/**
 * @version v1.0
 * @ProjectName: ltpon
 * @ClassName: Strainentey
 * @Description:
 * @Author: xbx
 * @Date: 2023/12/8 13:55
 */
@Data
public class StrainEntity3 {
    @ExcelProperty("时间")
    String time;
    @ExcelProperty("通道1")
    String v1;
    @ExcelProperty("通道2")
    String v2;
    @ExcelProperty("通道3")
    String v3;
    @ExcelProperty("通道4")
    String v4;
    Double v5;
    Double v6;
    Double v7;
    Double v8;
}
java 复制代码
package cn.sdjtky.ltpon.FileTest;

import cn.afterturn.easypoi.excel.annotation.Excel;
import lombok.Data;

import java.util.Date;

/**
 * @version v1.0
 * @ProjectName: ltpon
 * @ClassName: Strainentey
 * @Description:
 * @Author: xbx
 * @Date: 2023/12/8 13:55
 */
@Data
public class StressStrainDataDto {
//    年/月/日
    String date;
//    时/分/秒/毫秒
    String time;
//    时/分/秒/毫秒
    String dateTime;

    Double v1;
    Double v2;
    Double v3;
    Double v4;
    Double v5;
    Double v6;
    Double v7;
    Double v8;
    Double v9;
    Double v10;
    Double v11;
    Double v12;
    Double v13;
}
java 复制代码
package cn.sdjtky.ltpon.FileTest;

import cn.sdjtky.ltpon.FileTest.StrainEntity3;
import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.read.listener.ReadListener;
import com.alibaba.excel.util.ListUtils;
import com.alibaba.fastjson2.JSON;
import org.apache.poi.ss.formula.functions.T;

import java.util.ArrayList;
import java.util.List;

// 有个很重要的点 DemoDataListener 不能被spring管理,要每次读取excel都要new,然后里面用到spring可以构造方法传进去
public class Strain3ReadListener<T> implements ReadListener<T> {

    /**
     * 每隔5条存储数据库,实际使用中可以100条,然后清理list ,方便内存回收
     */
    /**
     * 缓存的数据
     */
    private List<T> cachedDataList = new ArrayList<T>();

    /**
     * 这个每一条数据解析都会来调用
     *
     * @param data    one row value. Is is same as {@link AnalysisContext#readRowHolder()}
     * @param context
     */
    @Override
    public void invoke(T data, AnalysisContext context) {
        cachedDataList.add(data);
//        // 达到BATCH_COUNT了,需要去存储一次数据库,防止数据几万条数据在内存,容易OOM
//        if (cachedDataList.size() >= BATCH_COUNT) {
//            // 存储完成清理 list
//            cachedDataList = ListUtils.newArrayListWithExpectedSize(BATCH_COUNT);
//        }
    }

    /**
     * 所有数据解析完成了 都会来调用
     *
     * @param context
     */
    @Override
    public void doAfterAllAnalysed(AnalysisContext context) {
        // 这里也要保存数据,确保最后遗留的数据也存储到数据库
    }
    public List<T> getCachedDataList() {
        return cachedDataList;
    }
}

3.2、读CSV

java 复制代码
package cn.sdjtky.ltpon.FileTest;

import cn.afterturn.easypoi.csv.CsvImportUtil;
import cn.afterturn.easypoi.csv.entity.CsvImportParams;
import cn.afterturn.easypoi.excel.entity.ImportParams;
import cn.hutool.core.io.resource.ResourceUtil;
import cn.hutool.core.text.csv.CsvReader;
import cn.hutool.core.text.csv.CsvUtil;
import com.alibaba.excel.EasyExcel;
import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.alibaba.excel.support.ExcelTypeEnum;
import org.junit.jupiter.api.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.File;
import java.io.FileInputStream;
import java.util.ArrayList;
import java.util.List;

public class ReadCsvTest {

    private static final Logger LOGGER = LoggerFactory.getLogger(ReadCsvTest.class);
    
    @Test
    public void test() {
        String filePath = "G:/test/1048575.csv";
        hutool(filePath);
//        esayPoi(filePath);
//        easyExcel1(filePath);
//        easyExcel2(filePath);
    }

    public void hutool(String filePath) {

        try {
            long start = System.currentTimeMillis();
            CsvReader reader = CsvUtil.getReader();
            List<StrainEntity> result = reader.read(ResourceUtil.getUtf8Reader(filePath), StrainEntity.class);
            long end = System.currentTimeMillis();
            System.out.println("hutool:"+ (end-start));
            System.out.println("行数:"+result.size());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void esayPoi(String filePath) {

        try {
            CsvImportParams params = new CsvImportParams(CsvImportParams.UTF8);
            long start = System.currentTimeMillis();
            List<StrainEntity2> result = CsvImportUtil.importCsv(
                    new FileInputStream(new File(filePath)),
                    StrainEntity2.class,
                    params);

            long end = System.currentTimeMillis();
            System.out.println("esayPoi:"+ (end-start));
            System.out.println("行数:"+result.size());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void easyExcel1(String filePath) {
        try {
            ImportParams params = new ImportParams();
            List<StrainEntity3> result = new ArrayList<StrainEntity3>();
            long start = System.currentTimeMillis();

            EasyExcel.read(filePath, StrainEntity3.class, new AnalysisEventListener<StrainEntity3>() {
                @Override
                public void invoke(StrainEntity3 reportExcel, AnalysisContext analysisContext) {
                    // 将读取到的每一行存入reportDetails集合中
                    result.add(reportExcel);
                }
                @Override
                public void doAfterAllAnalysed(AnalysisContext analysisContext) {}
            }).excelType(ExcelTypeEnum.CSV).sheet().doRead();

            long end = System.currentTimeMillis();
            System.out.println("easyExcel1:"+ (end-start));
            System.out.println("行数:"+result.size());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void easyExcel2(String filePath) {
        final Strain3ReadListener<StrainEntity3> strain3ReadListener = new Strain3ReadListener<StrainEntity3>() ;

        try {
            long start = System.currentTimeMillis();
            EasyExcel.read(filePath, StrainEntity3.class, strain3ReadListener).sheet().doRead();
//            EasyExcel.read(filePath)
//                    .excelType(ExcelTypeEnum.CSV)
//                    .registerReadListener(strain3ReadListener)
//                    .sheet()
//                    .doRead();
            List<StrainEntity3> result = strain3ReadListener.getCachedDataList();

            long end = System.currentTimeMillis();
            System.out.println("easyExcel2:"+ (end-start));
            System.out.println("行数:"+result.size());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}

3.3、读Excel

java 复制代码
package cn.sdjtky.ltpon.FileTest;

import cn.afterturn.easypoi.excel.ExcelImportUtil;
import cn.afterturn.easypoi.excel.entity.ImportParams;
import cn.afterturn.easypoi.handler.inter.IReadHandler;
import cn.hutool.poi.excel.ExcelReader;
import cn.hutool.poi.excel.ExcelUtil;
import cn.sdjtky.ltpon.easy.excel.listener.MergeCellsReadListener;
import cn.sdjtky.ltpon.poi.DemoDataListener;
import com.alibaba.excel.EasyExcel;
import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.enums.CellExtraTypeEnum;
import com.alibaba.excel.event.AnalysisEventListener;
import com.alibaba.excel.read.listener.PageReadListener;
import com.alibaba.excel.support.ExcelTypeEnum;
import com.alibaba.fastjson2.JSON;
import org.junit.jupiter.api.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.File;
import java.io.FileInputStream;
import java.util.ArrayList;
import java.util.List;

public class ReadExcelTest {

    private static final Logger LOGGER = LoggerFactory.getLogger(ReadExcelTest.class);
    
    @Test
    public void test() {
        String filePath = "G:/test/1048575.xlsx";
        hutool(filePath);
//        esayPoi(filePath);
//        easyExcel1(filePath);
//        easyExcel2(filePath);
    }



    public void hutool(String filePath) {

        try {
            long start = System.currentTimeMillis();
            ExcelReader reader = ExcelUtil.getReader(filePath);
            List<StrainEntity> result = reader.readAll(StrainEntity.class);
            long end = System.currentTimeMillis();
            System.out.println("hutool:"+ (end-start));
            System.out.println("行数:"+result.size());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void esayPoi(String filePath) {
        try {
            ImportParams params = new ImportParams();
            List<StrainEntity2> result = new ArrayList<StrainEntity2>();
            long start = System.currentTimeMillis();
            ExcelImportUtil.importExcelBySax(
                    new FileInputStream(new File(filePath)),
                    StrainEntity2.class,
                    params,
                    new IReadHandler<StrainEntity2>() {
                        @Override
                        public void handler(StrainEntity2 o) {
                            result.add(o);
                        }
                        @Override
                        public void doAfterAll() {
                            System.out.println("全部执行完毕了--------------------------------");
                        }
                    });

            long end = System.currentTimeMillis();
            System.out.println("esayPoi:"+ (end-start));
            System.out.println("行数:"+result.size());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void easyExcel1(String filePath) {
        try {
            ImportParams params = new ImportParams();
            List<StrainEntity3> result = new ArrayList<StrainEntity3>();
            long start = System.currentTimeMillis();

            EasyExcel.read(filePath, StrainEntity3.class, new AnalysisEventListener<StrainEntity3>() {
                @Override
                public void invoke(StrainEntity3 reportExcel, AnalysisContext analysisContext) {
                    // 将读取到的每一行存入reportDetails集合中
                    result.add(reportExcel);
                }
                @Override
                public void doAfterAllAnalysed(AnalysisContext analysisContext) {}
            }).sheet().doRead();

            long end = System.currentTimeMillis();
            System.out.println("easyExcel1:"+ (end-start));
            System.out.println("行数:"+result.size());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void easyExcel2(String filePath) {
        final Strain3ReadListener<StrainEntity3> strain3ReadListener = new Strain3ReadListener<StrainEntity3>() ;

        try {
            long start = System.currentTimeMillis();
            EasyExcel.read(filePath, StrainEntity3.class, strain3ReadListener).sheet().doRead();
//            EasyExcel.read(filePath)
//                    .registerReadListener(strain3ReadListener)
//                    .sheet()
//                    .doRead();
            List<StrainEntity3> result = strain3ReadListener.getCachedDataList();

            long end = System.currentTimeMillis();
            System.out.println("easyExcel2:"+ (end-start));
            System.out.println("行数:"+result.size());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}

3.4、写CSV

java 复制代码
package cn.sdjtky.ltpon.FileTest;

import cn.afterturn.easypoi.csv.CsvExportUtil;
import cn.afterturn.easypoi.csv.CsvImportUtil;
import cn.afterturn.easypoi.csv.entity.CsvExportParams;
import cn.afterturn.easypoi.csv.entity.CsvImportParams;
import cn.afterturn.easypoi.excel.entity.ImportParams;
import cn.hutool.core.io.FastByteArrayOutputStream;
import cn.hutool.core.io.resource.ResourceUtil;
import cn.hutool.core.text.csv.CsvReader;
import cn.hutool.core.text.csv.CsvUtil;
import cn.hutool.core.text.csv.CsvWriter;
import cn.hutool.core.util.CharsetUtil;
import cn.sdjtky.ltpon.query.HumidityQuery;
import cn.sdjtky.ltpon.utils.BeanCopierUtils;
import com.alibaba.excel.EasyExcel;
import com.alibaba.excel.ExcelWriter;
import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.alibaba.excel.support.ExcelTypeEnum;
import com.alibaba.excel.write.metadata.WriteSheet;
import com.ruoyi.common.utils.uuid.IdUtils;
import org.junit.jupiter.api.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.BeanUtils;

import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.ArrayList;
import java.util.List;

public class WriteCsvTest {

    private static final Logger LOGGER = LoggerFactory.getLogger(WriteCsvTest.class);
    
    @Test
    public void test() {
        String filePath = "G:/test/1048575.csv";
        List<StrainEntity3> strainEntity3List  = Rerad_easyExcel1(filePath);

        List<StrainEntity> strainEntityList = BeanCopierUtils.list(strainEntity3List, StrainEntity::new);
        List<StrainEntity2> strainEntity2List = BeanCopierUtils.list(strainEntity3List, StrainEntity2::new);
//        List<StrainEntity3> strainEntity3List = BeanCopierUtils.list(strainEntity3List, StrainEntity3::new);
//        hutool(strainEntityList);
//        esayPoi(strainEntity2List);
//        easyExcel1(strainEntity3List);
        easyExcel2(strainEntity3List);
    }

    public List<StrainEntity3> Rerad_easyExcel1(String filePath) {
        List<StrainEntity3> result = new ArrayList<StrainEntity3>();
        try {
            ImportParams params = new ImportParams();

            EasyExcel.read(filePath, StrainEntity3.class, new AnalysisEventListener<StrainEntity3>() {
                @Override
                public void invoke(StrainEntity3 reportExcel, AnalysisContext analysisContext) {
                    // 将读取到的每一行存入reportDetails集合中
                    result.add(reportExcel);
                }
                @Override
                public void doAfterAllAnalysed(AnalysisContext analysisContext) {}
            }).excelType(ExcelTypeEnum.CSV).sheet().doRead();

        } catch (Exception e) {
            e.printStackTrace();
        }
        return result;
    }

    public void hutool(List<StrainEntity> list) {
        System.out.println("数据行数:"+list.size());
        try {
            long start = System.currentTimeMillis();
            CsvWriter writer = CsvUtil.getWriter("G:/test/write/hutool.csv", CharsetUtil.CHARSET_UTF_8);
//            writer.write(list);
            writer.writeBeans(list);
            long end = System.currentTimeMillis();
            long cost = end-start;
            System.out.println("hutool:"+ cost);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void esayPoi(List<StrainEntity2> list) {
        System.out.println("数据行数:"+list.size());
        try {
            long start = System.currentTimeMillis();

            CsvExportParams params = new CsvExportParams(CsvImportParams.UTF8);
            FileOutputStream fos = new FileOutputStream("G:/test/write/esayPoi.csv");
            CsvExportUtil.exportCsv(params, StrainEntity2.class, list, fos);
            fos.flush();
            fos.close();

            long end = System.currentTimeMillis();
            long cost = end-start;
            System.out.println("esayPoi:"+ cost);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void easyExcel1(List<StrainEntity3> list) {
        System.out.println("数据行数:"+list.size());
        try {
            long start = System.currentTimeMillis();

            FastByteArrayOutputStream fastByteArrayOutputStream = new FastByteArrayOutputStream();
            try {
                EasyExcel.write(fastByteArrayOutputStream, StrainEntity3.class)
                        .autoCloseStream(false)
                        .excelType(ExcelTypeEnum.CSV)
                        .sheet("sheet页")
                        .doWrite(list);
                FileOutputStream fileOutputStream = new FileOutputStream("G:/test/write/easyExcel.csv");
                fastByteArrayOutputStream.writeTo(fileOutputStream);
                fileOutputStream.flush();
                fileOutputStream.close();

            } finally {
            }

            long end = System.currentTimeMillis();
            long cost = end-start;
            System.out.println("easyExcel1:"+ cost);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void easyExcel2(List<StrainEntity3> list) {
        System.out.println("数据行数:"+list.size());
        try {
            long start = System.currentTimeMillis();

            try {
                EasyExcel.write("G:/test/write/easyExcel.csv", StrainEntity3.class).excelType(ExcelTypeEnum.CSV).sheet("sss").doWrite(list);
            } finally {
            }

            long end = System.currentTimeMillis();
            long cost = end-start;
            System.out.println("easyExcel2:"+ cost);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}

3.5、写Excel

java 复制代码
package cn.sdjtky.ltpon.FileTest;

import cn.afterturn.easypoi.excel.ExcelExportUtil;
import cn.afterturn.easypoi.excel.ExcelImportUtil;
import cn.afterturn.easypoi.excel.entity.ExportParams;
import cn.afterturn.easypoi.excel.entity.ImportParams;
import cn.afterturn.easypoi.excel.entity.TemplateExportParams;
import cn.afterturn.easypoi.handler.inter.IExcelExportServer;
import cn.afterturn.easypoi.handler.inter.IReadHandler;
import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.io.FastByteArrayOutputStream;
import cn.hutool.core.text.csv.CsvUtil;
import cn.hutool.core.text.csv.CsvWriter;
import cn.hutool.core.util.CharsetUtil;
import cn.hutool.poi.excel.BigExcelWriter;
import cn.hutool.poi.excel.ExcelReader;
import cn.hutool.poi.excel.ExcelUtil;
import cn.hutool.poi.excel.ExcelWriter;
import cn.sdjtky.ltpon.utils.BeanCopierUtils;
import com.alibaba.excel.EasyExcel;
import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.alibaba.excel.support.ExcelTypeEnum;
import com.alibaba.excel.write.metadata.WriteSheet;
import com.alibaba.excel.write.metadata.fill.FillWrapper;
import com.ruoyi.common.utils.uuid.IdUtils;
import lombok.SneakyThrows;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.streaming.SXSSFWorkbook;
import org.junit.jupiter.api.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class WriteExcelTest {

    private static final Logger LOGGER = LoggerFactory.getLogger(WriteExcelTest.class);
    
    @Test
    public void test() {
        String filePath = "G:/test/1048575.csv";
        List<StrainEntity3> strainEntity3List  = Rerad_easyExcel1(filePath);

        List<StrainEntity> strainEntityList = BeanCopierUtils.list(strainEntity3List, StrainEntity::new);
        List<StrainEntity2> strainEntity2List = BeanCopierUtils.list(strainEntity3List, StrainEntity2::new);
//        hutool1(strainEntityList);
//        hutool2(strainEntityList);
//        esayPoi1(strainEntity2List);
//        esayPoi2(strainEntity2List);
//        easyExcel1(strainEntity3List);
//        easyExcel2(strainEntity3List);
//        easyExcel3(strainEntity3List);
        easyExcel4(strainEntity3List);
    }

    public List<StrainEntity3> Rerad_easyExcel1(String filePath) {
        List<StrainEntity3> result = new ArrayList<StrainEntity3>();
        try {
            ImportParams params = new ImportParams();

            EasyExcel.read(filePath, StrainEntity3.class, new AnalysisEventListener<StrainEntity3>() {
                @Override
                public void invoke(StrainEntity3 reportExcel, AnalysisContext analysisContext) {
                    // 将读取到的每一行存入reportDetails集合中
                    result.add(reportExcel);
                }
                @Override
                public void doAfterAllAnalysed(AnalysisContext analysisContext) {}
            }).excelType(ExcelTypeEnum.CSV).sheet().doRead();

        } catch (Exception e) {
            e.printStackTrace();
        }
        return result;
    }

    public void hutool1(List<StrainEntity> list) {
        System.out.println("数据行数:"+list.size());
        try {
            long start = System.currentTimeMillis();
            ExcelWriter writer = ExcelUtil.getWriter("G:/test/write/hutool.xlsx");
            writer.write(list, true);
            // 关闭writer,释放内存
            writer.close();
            long end = System.currentTimeMillis();
            long cost = end-start;
            System.out.println("hutool:"+ cost);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void hutool2(List<StrainEntity> list) {
        System.out.println("数据行数:"+list.size());
        try {
            long start = System.currentTimeMillis();

            BigExcelWriter writer= ExcelUtil.getBigWriter("G:/test/write/hutool2"+ IdUtils.getSequenceID()+".xlsx");
            writer.write(list);
            writer.close();

            long end = System.currentTimeMillis();
            long cost = end-start;
            System.out.println("hutool2:"+ cost);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void esayPoi1(List<StrainEntity2> list) {
        System.out.println("数据行数:"+list.size());
        try {
            long start = System.currentTimeMillis();

            ExportParams params   = new ExportParams();
            params.setMaxNum(1048576);
            Workbook  workbook = null;
            workbook = ExcelExportUtil.exportBigExcel(params, StrainEntity2.class, new IExcelExportServer() {

                @Override
                public List<Object> selectListForExcelExport(Object obj, int page) {
                    if (list.size()<=0){
                        return null;
                    }
                    List<Object> listObj = new ArrayList<Object>();
                    listObj.addAll(list);
                    list.clear();
                    return listObj;
                }
            }, 1);

//           workbook = ExcelExportUtil.exportExcel(params,StrainEntity2.class,list);

            FileOutputStream fos = new FileOutputStream("G:/test/write/esayPoi.xlsx");
            workbook.write(fos);
            fos.close();

            long end = System.currentTimeMillis();
            long cost = end-start;
            System.out.println("esayPoi:"+ cost);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void esayPoi2(List<StrainEntity2> list) {
        System.out.println("数据行数:"+list.size());
        try {
            long start = System.currentTimeMillis();

            Map<String, Object> map = new HashMap<String, Object>();
            map.put("list", list);
            TemplateExportParams params = new TemplateExportParams("G:/test/t/StrainEntity2.xlsx");
            Workbook workbook = ExcelExportUtil.exportExcel(params, map);
            FileOutputStream fos = new FileOutputStream("G:/test/write/esayPoi2.xlsx");
            workbook.write(fos);
            fos.close();

            long end = System.currentTimeMillis();
            long cost = end-start;
            System.out.println("esayPoi2:"+ cost);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void easyExcel1(List<StrainEntity3> list) {
        System.out.println("数据行数:"+list.size());
        try {
            long start = System.currentTimeMillis();

            FastByteArrayOutputStream fastByteArrayOutputStream = new FastByteArrayOutputStream();
            try {
                EasyExcel.write(fastByteArrayOutputStream, StrainEntity3.class)
                        .autoCloseStream(false)
                        .excelType(ExcelTypeEnum.XLSX)
                        .sheet("sheet页")
                        .doWrite(list);
                FileOutputStream fileOutputStream = new FileOutputStream("G:/test/write/easyExcel.xlsx");
                fastByteArrayOutputStream.writeTo(fileOutputStream);
                fileOutputStream.flush();
                fileOutputStream.close();

            } finally {
            }

            long end = System.currentTimeMillis();
            long cost = end-start;
            System.out.println("easyExcel1:"+ cost);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void easyExcel2(List<StrainEntity3> list) {
        System.out.println("数据行数:"+list.size());
        try {
            long start = System.currentTimeMillis();

            try {
                EasyExcel.write("G:/test/write/easyExcel.xlsx", StrainEntity3.class).excelType(ExcelTypeEnum.XLSX).sheet("sss").doWrite(list);
            } finally {
            }

            long end = System.currentTimeMillis();
            long cost = end-start;
            System.out.println("easyExcel2:"+ cost);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void easyExcel3(List<StrainEntity3> list) {
        System.out.println("数据行数:"+list.size());
        try {
            long start = System.currentTimeMillis();

            String templateFileName = "G:/test/t/StrainEntity3.xlsx";
            String fileName = "G:/test/write/easyExcel.xlsx";
            // 方案1 一下子全部放到内存里面 并填充
            // 这里 会填充到第一个sheet, 然后文件流会自动关闭
            EasyExcel.write(fileName).withTemplate(templateFileName).sheet().doFill(list);

            long end = System.currentTimeMillis();
            long cost = end-start;
            System.out.println("easyExcel3:"+ cost);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void easyExcel4(List<StrainEntity3> list) {
        System.out.println("数据行数:"+list.size());
        try {
            long start = System.currentTimeMillis();
            FastByteArrayOutputStream fastByteArrayOutputStream = new FastByteArrayOutputStream();
            // 方案2 分多次 填充 会使用文件缓存(省内存)
            String templateFileName = "G:/test/t/StrainEntity3.xlsx";
            String fileName = "G:/test/write/easyExcel.xlsx";
            try (com.alibaba.excel.ExcelWriter excelWriter = EasyExcel.write(fastByteArrayOutputStream).withTemplate(templateFileName).build()) {
                WriteSheet writeSheet = EasyExcel.writerSheet().build();
                excelWriter.fill(list, writeSheet);
            }

//            String templateFileName = "G:/test/t/StrainEntity3.1.xlsx";
//            String fileName = "G:/test/write/easyExcel.xlsx";
//            try (com.alibaba.excel.ExcelWriter excelWriter = EasyExcel.write(fileName).withTemplate(templateFileName).build()) {
//                WriteSheet writeSheet = EasyExcel.writerSheet().build();
//                excelWriter.fill(new FillWrapper("sl", list),  writeSheet);
//            }

//            String templateFileName = "G:/test/t/StrainEntity3.1.xlsx";
//            String fileName = "G:/test/write/easyExcel.xlsx";
//            try (com.alibaba.excel.ExcelWriter excelWriter = EasyExcel.write(fileName).withTemplate(templateFileName).build()) {
//                WriteSheet writeSheet = EasyExcel.writerSheet().build();
//                excelWriter.fill(new FillWrapper("sl", listX),  writeSheet);
//                excelWriter.fill(new FillWrapper("sl", listX),  writeSheet);
//                excelWriter.fill(new FillWrapper("sl", listX),  writeSheet);
//                excelWriter.fill(new FillWrapper("sl", listX),  writeSheet);
//                excelWriter.fill(new FillWrapper("sl", listX),  writeSheet);
//            }


            long end = System.currentTimeMillis();
            long cost = end-start;
            System.out.println("easyExcel4:"+ cost);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

3.6、业务示例

java 复制代码
package cn.sdjtky.ltpon.FileTest;

import cn.afterturn.easypoi.excel.ExcelExportUtil;
import cn.afterturn.easypoi.excel.entity.ExportParams;
import cn.afterturn.easypoi.excel.entity.ImportParams;
import cn.afterturn.easypoi.excel.entity.TemplateExportParams;
import cn.afterturn.easypoi.handler.inter.IExcelExportServer;
import cn.hutool.core.io.FastByteArrayOutputStream;
import cn.hutool.poi.excel.BigExcelWriter;
import cn.hutool.poi.excel.ExcelUtil;
import cn.hutool.poi.excel.ExcelWriter;
import cn.sdjtky.ltpon.utils.BeanCopierUtils;
import cn.sdjtky.ltpon.utils.LocalDateTimeUtils;
import com.alibaba.excel.EasyExcel;
import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.enums.WriteDirectionEnum;
import com.alibaba.excel.event.AnalysisEventListener;
import com.alibaba.excel.support.ExcelTypeEnum;
import com.alibaba.excel.write.metadata.WriteSheet;
import com.alibaba.excel.write.metadata.fill.FillConfig;
import com.alibaba.excel.write.metadata.fill.FillWrapper;
import com.ruoyi.common.utils.DateUtils;
import com.ruoyi.common.utils.uuid.IdUtils;
import org.apache.poi.ss.usermodel.Workbook;
import org.junit.jupiter.api.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.core.io.DefaultResourceLoader;
import org.springframework.core.io.Resource;

import java.io.ByteArrayOutputStream;
import java.io.FileOutputStream;
import java.time.LocalDateTime;
import java.util.*;

public class StressStrainTest {

    private static final Logger LOGGER = LoggerFactory.getLogger(StressStrainTest.class);

    private static final String stationName = "临沂G205观测点";
    private static final String pileNumber = "K103--K113";
    private static final String observer = "徐本锡";
    private static final String observationDate = LocalDateTimeUtils.format(LocalDateTimeUtils.DEFAULT_PATTERN,LocalDateTime.now());
    private static final String reviewer = "金小少";
    private static final String reviewDate = LocalDateTimeUtils.format(LocalDateTimeUtils.DEFAULT_PATTERN,LocalDateTime.now());
    @Test
    public void test() {
//        esayPoi2();
        easyExcel4();
//        easyExcelCSV2();
    }


    public Map<String, Object> getData(){
        Map<String, Object> map = new HashMap<String, Object>();

        List<DeviceDto> deviceList = new ArrayList<DeviceDto>();
        for (int i=1; i<=8; i++){
            DeviceDto deviceDto= new DeviceDto();
            deviceDto.setSn("传感器x_"+i);
            deviceDto.setSurfaceDistance(Double.valueOf(i));
            deviceDto.setStructuralLayer("层位"+i);
            deviceDto.setChannel("电信号");
            deviceDto.setDataKey("t.v"+i);
            deviceList.add(deviceDto);
        }

        List<Map<String, Object>> dataList = new ArrayList<Map<String, Object>>();
        List<StressStrainDataDto> dataList2 = new ArrayList<StressStrainDataDto>();
        for(int i=0; i<100; i++){
            Map<String, Object> m = new HashMap<String, Object>();
            StressStrainDataDto dto = new StressStrainDataDto();
            for (int j=1; j<=8; j++){
                m.put("date", DateUtils.datePath());
                m.put("time", DateUtils.dateTimeNow(DateUtils.HHMMssSSS_1));
                m.put("v"+j, Math.random()+1);

                dto.setDate(DateUtils.datePath());
                dto.setTime(DateUtils.dateTimeNow(DateUtils.HHMMssSSS_1));
                dto.setDateTime(DateUtils.dateTimeNow(DateUtils.YYYYMMDDHHMMssSSS_1));

                dto.setV1( Math.random()+1);
                dto.setV2( Math.random()+1);
                dto.setV3( Math.random()+1);
                dto.setV4( Math.random()+1);
                dto.setV5( Math.random()+1);
                dto.setV6( Math.random()+1);
                dto.setV7( Math.random()+1);
                dto.setV8( Math.random()+1);
            }
            dataList.add(m);
            dataList2.add(dto);
        }

        map.put("stationName", stationName);
        map.put("pileNumber", pileNumber);
        map.put("observer", observer);
        map.put("observationDate", observationDate);
        map.put("reviewer", reviewer);
        map.put("reviewDate", reviewDate);
        map.put("deviceList", deviceList);
        map.put("dataList", dataList2);

        return map;
    }

    public void esayPoi2() {
        Map<String, Object> data = getData();
        System.out.println("数据行数:"+((List)data.get("dataList")).size());
        try {
            long start = System.currentTimeMillis();
            TemplateExportParams params = new TemplateExportParams("G:/test/t/stressStrainTemplateDongHua.xlsx");
            params.setColForEach(true);
            Workbook workbook = ExcelExportUtil.exportExcel(params, data);
            FileOutputStream fos = new FileOutputStream("G:/test/write/stressStrainTemplateDongHua.xlsx");
            workbook.write(fos);
            fos.close();

            long end = System.currentTimeMillis();
            long cost = end-start;
            System.out.println("esayPoi2:"+ cost);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void easyExcel4() {
        Map<String, Object> data = getData();
        Map<String, Object> data1 = new HashMap<String, Object>();
        data1.put("stationName", data.get("stationName"));
        data1.put("pileNumber", data.get("pileNumber"));
        data1.put("observer", data.get("observer"));
        data1.put("observationDate", data.get("observationDate"));
        data1.put("reviewer", data.get("reviewer"));
        data1.put("reviewDate", data.get("reviewDate"));
        List<DeviceDto> deviceList = (List<DeviceDto>) data.get("deviceList");
        List<StressStrainDataDto> dataList = (List<StressStrainDataDto>) data.get("dataList");

        // 根据用户传入字段 导出数据
        Set<String> includeColumnFiledNames = new HashSet<String>();
        includeColumnFiledNames.add("date");
//        includeColumnFiledNames.add("time");
        for(int i=0; i<deviceList.size(); i++){
            includeColumnFiledNames.add("v"+(i+1));
        }

        System.out.println("数据行数:"+((List)data.get("dataList")).size());
        try {
            long start = System.currentTimeMillis();
            Resource resource = new DefaultResourceLoader().getResource("classpath:templates/stressStrain/stressStrainTemplateDongHua.xlsx");

            FastByteArrayOutputStream outputStream = new FastByteArrayOutputStream();
            // 方案2 分多次 填充 会使用文件缓存(省内存)
//            String templateFileName = "G:/test/t/stressStrainTemplateDongHua2.xlsx";
//            try (com.alibaba.excel.ExcelWriter excelWriter = EasyExcel.write(fastByteArrayOutputStream).withTemplate(templateFileName).build()) {
//                WriteSheet writeSheet = EasyExcel.writerSheet().build();
//                FillConfig fillConfig = FillConfig.builder().autoStyle(true).direction(WriteDirectionEnum.HORIZONTAL).build();
//                excelWriter.fill(data1,  writeSheet);
//                excelWriter.fill(new FillWrapper("deviceList", deviceList), fillConfig, writeSheet);
                writeSheet.setIncludeColumnFieldNames(includeColumnFiledNames);
//                excelWriter.fill(new FillWrapper("dataList", dataList),  writeSheet);
//            }


            try (com.alibaba.excel.ExcelWriter excelWriter = EasyExcel.write(outputStream).withTemplate(resource.getInputStream()).build()) {
                WriteSheet writeSheet = EasyExcel.writerSheet().build();
                FillConfig fillConfig = FillConfig.builder().autoStyle(true).direction(WriteDirectionEnum.HORIZONTAL).build();
                excelWriter.fill(data1,  writeSheet);
                excelWriter.fill(new FillWrapper("deviceList", deviceList), fillConfig, writeSheet);
                excelWriter.fill(new FillWrapper("dataList", dataList), writeSheet);
                excelWriter.close();
                outputStream.flush();
                outputStream.close();
            }
//            FileOutputStream fileOutputStream = new FileOutputStream("G:/test/write/123.xlsx");
//            outputStream.writeTo(fileOutputStream);
//            fileOutputStream.flush();
//            fileOutputStream.close();
            long end = System.currentTimeMillis();
//            String templateFileName = "G:/test/t/stressStrainTemplateDongHua2.xlsx";
//            String fileName = "G:/test/write/stressStrainTemplateDongHua2.xlsx";
//            try (com.alibaba.excel.ExcelWriter excelWriter = EasyExcel.write(fileName).withTemplate(resource.getInputStream()).build()) {
//                WriteSheet writeSheet = EasyExcel.writerSheet().build();
//                FillConfig fillConfig = FillConfig.builder().autoStyle(true).direction(WriteDirectionEnum.HORIZONTAL).build();
//                excelWriter.fill(data1,  writeSheet);
//                excelWriter.fill(new FillWrapper("deviceList", deviceList), fillConfig, writeSheet);
                writeSheet.setIncludeColumnFieldNames(includeColumnFiledNames);
//                excelWriter.fill(new FillWrapper("dataList", dataList),  writeSheet);
//            }


            long cost = end-start;
            System.out.println("easyExcel4:"+ cost);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void easyExcelCSV2() {


        Map<String, Object> data = getData();
        List<DeviceDto> deviceList = (List<DeviceDto>) data.get("deviceList");
        List<StressStrainDataDto> dataList = (List<StressStrainDataDto>) data.get("dataList");

        // 根据用户传入字段 导出数据
        Set<String> includeColumnFiledNames = new HashSet<String>();

        List<List<String>> headList = new ArrayList<List<String>>();
        List<String> head0 = new ArrayList<String>();
        head0.add("时间");
        head0.add("与路表距离");
        head0.add("结构层位");
        headList.add(head0);
        includeColumnFiledNames.add("dateTime");

        for(int i=0; i<deviceList.size(); i++){
            includeColumnFiledNames.add("v"+(i+1));
            List<String> head = new ArrayList<String>();
            head.add(deviceList.get(i).getSn());
            head.add(deviceList.get(i).getSurfaceDistance().toString());
            head.add(deviceList.get(i).getStructuralLayer());
            headList.add(head);
        }

        System.out.println("数据行数:"+((List)data.get("dataList")).size());
        try {
            long start = System.currentTimeMillis();

            try {
                EasyExcel.write("G:/test/write/stressStrainTemplateDongHua2.csv", StressStrainDataDto.class).head(headList).includeColumnFieldNames(includeColumnFiledNames).excelType(ExcelTypeEnum.CSV).sheet("sss").doWrite(dataList);
            } finally {
            }

            long end = System.currentTimeMillis();
            long cost = end-start;
            System.out.println("easyExcel2:"+ cost);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}
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