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SpringBoot2.x使用POI實(shí)現(xiàn)導(dǎo)入數(shù)據(jù)到Excel

更新時(shí)間：2025年07月22日 09:04:54 作者：大魚(yú)>

這篇文章主要為大家詳細(xì)介紹了SpringBoot2.x如何使用POI實(shí)現(xiàn)導(dǎo)入數(shù)據(jù)到Excel,文中的示例代碼講解詳細(xì),感興趣的小伙伴可以跟隨小編一起學(xué)習(xí)一下

一、前言

最近做一個(gè)推送服務(wù)將系統(tǒng)某些報(bào)表，通過(guò)郵件附件的形式推送給指定的人，首先我們需要在服務(wù)端生成報(bào)表的excel文檔。生成excel文檔采用的是POI的方式。

二、pom引入相應(yīng)的jar包

引入三個(gè)poi相關(guān)的jar包

        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>4.1.2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>4.1.2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml-schemas</artifactId>
            <version>4.1.2</version>
        </dependency>

注意：這三個(gè)jar包的版本號(hào)一定要保持一致。否則的話會(huì)引起異常，無(wú)法創(chuàng)建XSSFWorkbook

三、導(dǎo)出方法封裝類

import lombok.extern.slf4j.Slf4j;
import org.apache.http.client.utils.DateUtils;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

import java.io.FileOutputStream;
import java.io.IOException;
import java.sql.Timestamp;
import java.util.*;

/**
 * POI導(dǎo)出Excel封裝
 * @author lenny
 * @date 20210715
 */
@Slf4j
public class ExcelUtil {
    /**
     * @param fileName excel文件名
     * @param headMap  表頭map
     * @param dataList 表格數(shù)據(jù)
     */
    public static String exportExcel(String fileName,Map<String, String> headMap, List<Map<String, Object>> dataList) {
        String fullPath="";
        Workbook workbook = exportXlsx(fileName, headMap, dataList);
        FileOutputStream outputStream=null;
        try {
            //將生成的excel存儲(chǔ)在系統(tǒng)根目錄下excel文件夾中
            String path=CommonUtil.getRunningDirectory()+"\\excel\\";
            fullPath=path+fileName;
            outputStream = new FileOutputStream(path+fileName);
            workbook.write(outputStream);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (outputStream != null) {
                try {
                    outputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        //返回文件所在的目錄
        return fullPath;
    }

    /**
     * 導(dǎo)出數(shù)據(jù)
     *
     * @param headMap 表頭map
     * @param dataList 導(dǎo)出的數(shù)據(jù)
     */
    public static Workbook exportXlsx(String sheetName, Map<String, String> headMap, List<Map<String, Object>> dataList) {
        try {
            XSSFWorkbook workbook = new XSSFWorkbook();
            Sheet sheet = workbook.createSheet(sheetName);
            //初始化行列索引
            int rowIndex = 0, columnIndex = 0;
            Set<String> keys = headMap.keySet();
            //表頭
            Row row = sheet.createRow(rowIndex++);
            for (String key : keys) {
                Cell cell = row.createCell(columnIndex++);
                cell.setCellValue(headMap.get(key));
            }
            //內(nèi)容
            if (dataList != null && !dataList.isEmpty()) {
                for (Map<String, Object> map : dataList) {
                    row = sheet.createRow(rowIndex++);
                    columnIndex = 0;
                    for (String key : keys) {
                        Cell cell = row.createCell(columnIndex++);
                        setCellValue(cell, map.get(key));
                    }
                }
            }
            return workbook;
        }catch (Exception e){
            log.error(e.toString());
            return null;
        }
    }

    /**
     * 填充單元格內(nèi)容
     * @param cell
     * @param obj
     */
    private static void setCellValue(Cell cell, Object obj) {
        if (obj == null) {
            return;
        }
        if (obj instanceof String) {
            cell.setCellValue((String) obj);
        } else if (obj instanceof Date) {
            Date date = (Date) obj;
            if (date != null) {
                cell.setCellValue(DateUtils.formatDate(date));
            }
        } else if (obj instanceof Calendar) {
            Calendar calendar = (Calendar) obj;
            if (calendar != null) {
                cell.setCellValue(DateUtils.formatDate(calendar.getTime()));
            }
        } else if (obj instanceof Timestamp) {
            Timestamp timestamp = (Timestamp) obj;
            if (timestamp != null) {
                cell.setCellValue(DateUtils.formatDate(new Date(timestamp.getTime())));
            }
        } else if (obj instanceof Double) {
            cell.setCellValue((Double) obj);
        } else {
            cell.setCellValue(obj.toString());
        }
    }
}

其中使用到了封裝的獲取系統(tǒng)根目錄的方法，方法實(shí)現(xiàn)如下：

    /**
     * 得到程序運(yùn)行的根目錄
     * @return
     */
    public static String getRunningDirectory()
    {
        return System.getProperty("user.dir");
    }

四、調(diào)用方法執(zhí)行生成excel操作

    /**
     * 導(dǎo)出Adas報(bào)警
     * @param reportAdasList
     * @param language
     * @param timeDiff
     * @return
     */
    public static String exportAdasReport(List<ReportAdasList> reportAdasList, int language, int timeDiff) {
        //表頭
        Map<String, String> headNameMap = new LinkedHashMap<String, String>();
        headNameMap.put("agentName", getHeadName("agentName",language));
        headNameMap.put("vehicleName", getHeadName("vehicleName",language));
        headNameMap.put("assetID", getHeadName("assetID",language));
        headNameMap.put("alarmType", getHeadName("alarmType",language));
        headNameMap.put("alarmLevel", getHeadName("alarmLevel",language));
        headNameMap.put("startTime", getHeadName("startTime",language));
        headNameMap.put("endTime", getHeadName("endTime",language));
        headNameMap.put("driverName", getHeadName("driverName",language));
        headNameMap.put("startAddress", getHeadName("startAddress",language));
        headNameMap.put("endAddress", getHeadName("endAddress",language));
        headNameMap.put("processStatus", getHeadName("processStatus",language));
        headNameMap.put("processContext", getHeadName("processContext",language));
        headNameMap.put("processTime", getHeadName("processTime",language));
        //表格數(shù)據(jù)
        List<Map<String, Object>> dataList = new ArrayList<Map<String, Object>>();
        for(ReportAdasList item : reportAdasList){
            Map<String, Object> map = new HashMap<String, Object>();
            map.put("agentName", item.getAgentName());
            map.put("vehicleName", item.getVehicleName());
            map.put("assetID", item.getAssetID());
            map.put("alarmType", language==1?item.getCnName():item.getEnName());
            map.put("alarmLevel", getAlarmLevel(item.getAlarmLevel(),language));
            map.put("startTime", CommonUtil.getLocalTime(item.getStartTime(),timeDiff));
            map.put("endTime", CommonUtil.getLocalTime(item.getEndTime(),timeDiff));
            map.put("driverName", item.getDriverName());
            map.put("startAddress", CommonUtil.geoCoding(String.valueOf(item.getStartLatitude()),String.valueOf(item.getStartLongitude()),language));
            map.put("endAddress", CommonUtil.geoCoding(String.valueOf(item.getEndLatitude()),String.valueOf(item.getEndLongitude()),language));
            map.put("processStatus", getProcessStatus(item.getProcessStatus(),language));
            map.put("processContext", item.getProcessContext());
            map.put("processTime", CommonUtil.getLocalTime(item.getProcessTime(),timeDiff));
            dataList.add(map);
        }
        String fileName = "";
        if(language==1) {
            fileName= CommonConstants.CN_REPORT_ADAS;
        }else {
            fileName=CommonConstants.EN_REPORT_ADAS;
        }
        fileName=fileName+".xlsx";
        String fullPath = ExcelUtil.exportExcel(fileName,headNameMap,dataList);
        return fullPath;
    }

這里大家可以根據(jù)自己的系統(tǒng)自行調(diào)整，最后封裝成headMap（表頭字段）與List<Map<String, Object>>（數(shù)據(jù)列表）即可。

到此這篇關(guān)于SpringBoot2.x使用POI實(shí)現(xiàn)導(dǎo)入數(shù)據(jù)到Excel的文章就介紹到這了,更多相關(guān)SpringBoot POI導(dǎo)入數(shù)據(jù)到Excel內(nèi)容請(qǐng)搜索腳本之家以前的文章或繼續(xù)瀏覽下面的相關(guān)文章希望大家以后多多支持腳本之家！

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