easypoi工具类

package com.mye.hl11easypoi.api.util;

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 cn.afterturn.easypoi.excel.entity.result.ExcelImportResult;
import cn.afterturn.easypoi.excel.imports.ExcelImportService;
import com.mye.hl11easypoi.api.verifyHandler.MyVerifyHandler;
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;

/** * @ClassName: ExcelUtils * @Description: excle工具类 * */
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.XSSF);
        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.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 fileName 文件名称 * @param response */
    private 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.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);
    }

    public static <T> ExcelImportResult importExcelResult(MultipartFile file, Class<T> pojoClass) throws IOException {
        if (file == null) {
            return null;
        }
        try {
            ImportParams importParams = new ImportParams();
            importParams.setTitleRows(1); // 设置标题列占几行
            importParams.setHeadRows(2);  // 设置字段名称占几行 即header
            importParams.setNeedVerify(true);//开启校验
            importParams.setVerifyHandler(new MyVerifyHandler());// MyVerifyHandler这个类是自己创建的
            importParams.setStartSheetIndex(0);  // 设置从第几张表格开始读取，这里0代表第一张表，默认从第一张表读取
            return new ExcelImportService().importExcelByIs(file.getInputStream(), pojoClass, importParams, true);
        } catch (Exception e) {
            throw new IOException(e.getMessage());
        }
    }

    /** * 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());
        }
    }

    /** * Excel 类型枚举 */
    enum ExcelTypeEnum {
        /** * 文件类型 */
        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;
        }
    }
}