<!-- Excel导入导出 -->
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>4.1.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>4.1.0</version>
        </dependency>
        <dependency>
            <groupId>cn.afterturn</groupId>
            <artifactId>easypoi-spring-boot-starter</artifactId>
            <version>4.1.0</version>
        </dependency>

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.enmus.ExcelType;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.ss.usermodel.Workbook;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.URLEncoder;
import java.util.List;
import java.util.Map;
import java.util.NoSuchElementException;

public class ExcelUtils {
    /**
     * excel 导出
     *
     * @param list           数据
     * @param title          标题
     * @param sheetName      sheet名称
     * @param pojoClass      pojo类型
     * @param fileName       文件名称
     * @param isCreateHeader 是否创建表头
     * @param response
     */
    public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass, String fileName, boolean isCreateHeader, HttpServletResponse response) throws IOException {
        ExportParams exportParams = new ExportParams(title, sheetName, ExcelType.HSSF);
        exportParams.setCreateHeadRows(isCreateHeader);
        defaultExport(list, pojoClass, fileName, response, exportParams);
    }

    /**
     * excel 导出
     *
     * @param list      数据
     * @param title     标题
     * @param sheetName sheet名称
     * @param pojoClass pojo类型
     * @param fileName  文件名称
     * @param response
     */
    public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass, String fileName, HttpServletResponse response) throws IOException {
        defaultExport(list, pojoClass, fileName, response, new ExportParams(title, sheetName, ExcelType.HSSF));
    }

    /**
     * excel 导出
     *
     * @param list      数据
     * @param title     标题
     * @param sheetName sheet名称
     * @param pojoClass pojo类型
     * @param fileName  文件名称
     * @param response
     */
    public static void exportExcelXSSF(List<?> list, String title, String sheetName, Class<?> pojoClass, String fileName, HttpServletResponse response) throws IOException {
        defaultExportXSSF(list, pojoClass, fileName, response, new ExportParams(title, sheetName, ExcelType.XSSF));
    }

    /**
     * excel 导出
     *
     * @param list         数据
     * @param pojoClass    pojo类型
     * @param fileName     文件名称
     * @param response
     * @param exportParams 导出参数
     */
    public static void exportExcel(List<?> list, Class<?> pojoClass, String fileName, ExportParams exportParams, HttpServletResponse response) throws IOException {
        defaultExport(list, pojoClass, fileName, response, exportParams);
    }

    /**
     * excel 导出
     *
     * @param list     数据
     * @param fileName 文件名称
     * @param response
     */
    public static void exportExcel(List<Map<String, Object>> list, String fileName, HttpServletResponse response) throws IOException {
        defaultExport(list, fileName, response);
    }

    /**
     * 默认的 excel 导出
     *
     * @param list         数据
     * @param pojoClass    pojo类型
     * @param fileName     文件名称
     * @param response
     * @param exportParams 导出参数
     */
    private static void defaultExport(List<?> list, Class<?> pojoClass, String fileName, HttpServletResponse response, ExportParams exportParams) throws IOException {
        Workbook workbook = ExcelExportUtil.exportExcel(exportParams, pojoClass, list);
        downLoadExcel(fileName, response, workbook);
    }

    /**
     * 默认的 excel 导出
     *
     * @param list         数据
     * @param pojoClass    pojo类型
     * @param fileName     文件名称
     * @param response
     * @param exportParams 导出参数
     */
    private static void defaultExportXSSF(List<?> list, Class<?> pojoClass, String fileName, HttpServletResponse response, ExportParams exportParams) throws IOException {
        Workbook workbook = ExcelExportUtil.exportExcel(exportParams, pojoClass, list);
        downLoadExcelXSSF(fileName, response, workbook);
    }

    /**
     * 默认的 excel 导出
     *
     * @param list     数据
     * @param fileName 文件名称
     * @param response
     */
    public static void defaultExport(List<Map<String, Object>> list, String fileName, HttpServletResponse response) throws IOException {
        Workbook workbook = ExcelExportUtil.exportExcel(list, ExcelType.HSSF);
        downLoadExcel(fileName, response, workbook);
    }

    /**
     * 下载
     *
     * @param fileName 文件名称
     * @param response
     * @param workbook excel数据
     */
    private static void downLoadExcel(String fileName, HttpServletResponse response, Workbook workbook) throws IOException {
        try {
            response.setCharacterEncoding("UTF-8");
            response.setHeader("content-Type", "application/vnd.ms-excel");
            response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName + "." + ExcelTypeEnum.XLS.getValue(), "UTF-8"));
            workbook.write(response.getOutputStream());
        } catch (Exception e) {
            throw new IOException(e.getMessage());
        }
    }

    /**
     * 下载
     *
     * @param fileName 文件名称
     * @param response
     * @param workbook excel数据
     */
    private static void downLoadExcelXSSF(String fileName, HttpServletResponse response, Workbook workbook) throws IOException {
        try {
            response.setCharacterEncoding("UTF-8");
            response.setHeader("content-Type", "application/vnd.ms-excel");
            response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName + "." + ExcelTypeEnum.XLSX.getValue(), "UTF-8"));
            workbook.write(response.getOutputStream());
        } catch (Exception e) {
            throw new IOException(e.getMessage());
        }
    }

    /**
     * excel 导入
     *
     * @param filePath   excel文件路径
     * @param titleRows  标题行
     * @param headerRows 表头行
     * @param pojoClass  pojo类型
     * @param <T>
     * @return
     */
    public static <T> List<T> importExcel(String filePath, Integer titleRows, Integer headerRows, Class<T> pojoClass) throws IOException {
        if (StringUtils.isBlank(filePath)) {
            return null;
        }
        ImportParams params = new ImportParams();
        params.setTitleRows(titleRows);
        params.setHeadRows(headerRows);
        params.setNeedSave(true);
        params.setSaveUrl("/excel/");
        try {
            return ExcelImportUtil.importExcel(new File(filePath), pojoClass, params);
        } catch (NoSuchElementException e) {
            throw new IOException("模板不能为空");
        } catch (Exception e) {
            throw new IOException(e.getMessage());
        }
    }

    /**
     * excel 导入
     *
     * @param file      excel文件
     * @param pojoClass pojo类型
     * @param <T>
     * @return
     */
    public static <T> List<T> importExcel(MultipartFile file, Class<T> pojoClass) throws IOException {
        return importExcel(file, 1, 1, pojoClass);
    }

    /**
     * excel 导入
     *
     * @param file       excel文件
     * @param titleRows  标题行
     * @param headerRows 表头行
     * @param pojoClass  pojo类型
     * @param <T>
     * @return
     */
    public static <T> List<T> importExcel(MultipartFile file, Integer titleRows, Integer headerRows, Class<T> pojoClass) throws IOException {
        return importExcel(file, titleRows, headerRows, false, pojoClass);
    }

    /**
     * excel 导入
     *
     * @param file       上传的文件
     * @param titleRows  标题行
     * @param headerRows 表头行
     * @param needVerfiy 是否检验excel内容
     * @param pojoClass  pojo类型
     * @param <T>
     * @return
     */
    public static <T> List<T> importExcel(MultipartFile file, Integer titleRows, Integer headerRows, boolean needVerfiy, Class<T> pojoClass) throws IOException {
        if (file == null) {
            return null;
        }
        try {
            return importExcel(file.getInputStream(), titleRows, headerRows, needVerfiy, pojoClass);
        } catch (Exception e) {
            throw new IOException(e.getMessage());
        }
    }

    /**
     * excel 导入
     *
     * @param inputStream 文件输入流
     * @param titleRows   标题行
     * @param headerRows  表头行
     * @param needVerfiy  是否检验excel内容
     * @param pojoClass   pojo类型
     * @param <T>
     * @return
     */
    public static <T> List<T> importExcel(InputStream inputStream, Integer titleRows, Integer headerRows, boolean needVerfiy, Class<T> pojoClass) throws IOException {
        if (inputStream == null) {
            return null;
        }
        ImportParams params = new ImportParams();
        params.setTitleRows(titleRows);
        params.setHeadRows(headerRows);
        params.setSaveUrl("/excel/");
        params.setNeedSave(true);
        params.setNeedVerify(needVerfiy);
        try {
            return ExcelImportUtil.importExcel(inputStream, pojoClass, params);
        } catch (NoSuchElementException e) {
            throw new IOException("excel文件不能为空");
        } catch (Exception e) {
            throw new IOException(e.getMessage());
        }
    }

    /**
     * 功能：检查模板标题行小区是否是提交时传来的小区
     *
     * @param file
     * @param areaName
     * @return void
     * @author Keats
     * @date 2020/1/8 11:33
     */
   /* public static void checkArea(MultipartFile file, String areaName) throws WokeException {
        // 创建Excel，读取文件内容
        try {
            HSSFWorkbook workbook = new HSSFWorkbook(file.getInputStream());
            //读取默认第一个工作表sheet（方式二）
            HSSFSheet sheet = workbook.getSheetAt(0);
            //读取工作表中的数据
            //获取sheet中最后一行行号
            HSSFRow row = sheet.getRow(0);
            //获取当前行最后单元格的列号
            HSSFCell cell = row.getCell(0);
            String title = cell.getStringCellValue();
            String[] split = title.split("：");
            try {
                if(!split[1].equals(areaName)){
                    throw new WokeException(777, "模板小区不正确！");
                }
            } catch (ArrayIndexOutOfBoundsException e) {
                throw new WokeException(777, "模板小区不正确！");
            }
        } catch (IOException e) {
            throw new WokeException(777, "模板不正确！");
        }
    }*/

    /**
     * Excel 类型枚举
     */
    enum ExcelTypeEnum {
        XLS("xls"), XLSX("xlsx");
        private String value;

        ExcelTypeEnum(String value) {
            this.value = value;
        }

        public String getValue() {
            return value;
        }

        public void setValue(String value) {
            this.value = value;
        }
    }
}