基于java web ssm（Springboot+SpringMVC+Mybatis）+Mysql+微信小程序的图书捐赠管理系

package com.shequ.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 org.apache.commons.lang3.StringUtils; import org.apache.poi.ss.usermodel.Workbook; import org.springframework.web.multipart.MultipartFile; import javax.servlet.ServletOutputStream; import javax.servlet.http.HttpServletResponse; import java.io.File; import java.io.IOException; import java.net.URLEncoder; import java.text.SimpleDateFormat; import java.util.*; /** * @Description: 表格工具类 */ public class POIUtil { 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 RuntimeException(e.getMessage()); } } private static void defaultExport(List<Map<String, Object>> list, String fileName, HttpServletResponse response) { Workbook workbook = ExcelExportUtil.exportExcel(list, ExcelType.HSSF); if (workbook != null) ; downLoadExcel(fileName, response, workbook); } /** * 导入 * @param filePath * @param titleRows * @param headerRows * @param pojoClass * @param <T> * @return */ 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 RuntimeException("模板不能为空"); } catch (Exception e) { e.printStackTrace(); throw new RuntimeException(e.getMessage()); } return list; } /** * 导入表格 * @param file * @param pojoClass * @param <T> * @return */ public static <T> List<T> importExcel(MultipartFile file, Class<T> pojoClass) { if (file == null) { return null; } ImportParams params = new ImportParams(); try { List<T> list = ExcelImportUtil.importExcel(file.getInputStream(), pojoClass, params); return list; } catch (NoSuchElementException e) { throw new RuntimeException("excel文件不能为空"); } catch (Exception e) { throw new RuntimeException(e.getMessage()); } } /* 导出表格 */ public static void exportExcel(Collection<?> listData, Class<?> pojoClass, String headTitle, String sheetName, HttpServletResponse response) { ExportParams params = new ExportParams(null, null); params.setHeight((short) 8); params.setStyle(ExcelExportMyStylerImpl.class); try { Workbook workbook = ExcelExportUtil.exportExcel(params, pojoClass, listData); String fileName = headTitle + new SimpleDateFormat("yyyyMMddHHmmss").format(new Date()); fileName = URLEncoder.encode(fileName, "UTF8"); response.setContentType("application/vnd.ms-excel;chartset=utf-8"); response.setHeader("Content-Disposition", "attachment;filename="+fileName + ".xls"); ServletOutputStream out=response.getOutputStream(); workbook.write(out); out.flush(); out.close(); } catch (Exception e) { e.printStackTrace(); } } }