转载的一个比较好用的工具类
import javax.servlet.http.HttpServletResponse;import java.io.File;import java.io.IOException;import .URLEncoder;import java.util.List;import java.util.Map;import java.util.NoSuchElementException;//Excel导入导出工具类public class ExcelUtils {public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass, String fileName,boolean isCreateHeader, HttpServletResponse response) {ExportParams exportParams = new ExportParams(title, sheetName);exportParams.setCreateHeadRows(isCreateHeader);defaultExport(list, pojoClass, fileName, response, exportParams);}public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass, String fileName,HttpServletResponse response) {defaultExport(list, pojoClass, fileName, response, new ExportParams(title, sheetName));}public static void exportExcel(List<Map<String, Object>> list, String fileName, HttpServletResponse response) {defaultExport(list, fileName, response);}private static void defaultExport(List<?> list, Class<?> pojoClass, String fileName, HttpServletResponse response,ExportParams exportParams) {Workbook workbook = ExcelExportUtil.exportExcel(exportParams, pojoClass, list);if (workbook != null);downLoadExcel(fileName, response, workbook);}private static void downLoadExcel(String fileName, HttpServletResponse response, Workbook workbook) {try {response.setCharacterEncoding("UTF-8");response.setHeader("content-Type", "application/vnd.ms-excel");response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));workbook.write(response.getOutputStream());} catch (IOException e) {// throw new NormalException(e.getMessage());}}private static void defaultExport(List<Map<String, Object>> list, String fileName, HttpServletResponse response) {Workbook workbook = ExcelExportUtil.exportExcel(list, ExcelType.XSSF);if (workbook != null);downLoadExcel(fileName, response, workbook);}public static <T> List<T> importExcel(String filePath, Integer titleRows, Integer headerRows, Class<T> pojoClass) {if (StringUtils.isBlank(filePath)) {return null;}ImportParams params = new ImportParams();params.setTitleRows(titleRows);params.setHeadRows(headerRows);List<T> list = null;try {list = ExcelImportUtil.importExcel(new File(filePath), pojoClass, params);} catch (NoSuchElementException e) {// throw new NormalException("模板不能为空");} catch (Exception e) {e.printStackTrace();// throw new NormalException(e.getMessage());}return list;}public static <T> List<T> importExcel(MultipartFile file, Integer titleRows, Integer headerRows,Class<T> pojoClass) {if (file == null) {return null;}ImportParams params = new ImportParams();params.setTitleRows(titleRows);params.setHeadRows(headerRows);List<T> list = null;try {list = ExcelImportUtil.importExcel(file.getInputStream(), pojoClass, params);} catch (NoSuchElementException e) {// throw new NormalException("excel文件不能为空");} catch (Exception e) {// throw new NormalException(e.getMessage());System.out.println(e.getMessage());}return list;}}
