package com.kidgrow.common.utils;
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import cn.afterturn.easypoi.excel.ExcelExportUtil;
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import cn.afterturn.easypoi.excel.ExcelImportUtil;
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import cn.afterturn.easypoi.excel.entity.ExportParams;
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import cn.afterturn.easypoi.excel.entity.ImportParams;
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import cn.afterturn.easypoi.excel.entity.enmus.ExcelType;
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import org.apache.poi.ss.usermodel.Workbook;
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import org.apache.commons.lang3.StringUtils;
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import org.springframework.web.multipart.MultipartFile;
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import javax.servlet.http.HttpServletResponse;
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import java.io.File;
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import java.io.IOException;
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import java.net.URLEncoder;
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import java.util.Collections;
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import java.util.List;
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import java.util.Map;
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/**
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* 石家庄喜高科技有限责任公司 版权所有 © Copyright 2020<br>
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*
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* @Description: Excel 工具类<br>
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* @Project: <br>
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* @CreateDate: Created in 2020/2/3 15:45 <br>
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* @Author: <a href="4345453@kidgrow.com">liuke</a>
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*/
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public class ExcelUtil {
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private ExcelUtil() {
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throw new IllegalStateException("Utility class");
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}
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/**
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* 导出
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*
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* @param list 数据列表
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* @param title 标题
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* @param sheetName sheet名称
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* @param pojoClass 元素类型
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* @param fileName 文件名
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* @param isCreateHeader 是否创建列头
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* @param response
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* @throws IOException
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*/
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public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass, String fileName
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, boolean isCreateHeader, HttpServletResponse response) throws IOException {
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ExportParams exportParams = new ExportParams(title, sheetName, ExcelType.XSSF);
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exportParams.setCreateHeadRows(isCreateHeader);
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defaultExport(list, pojoClass, fileName, response, exportParams);
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}
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/**
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* 导出
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*
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* @param list 数据列表
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* @param title 标题
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* @param sheetName sheet名称
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* @param pojoClass 元素类型
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* @param fileName 文件名
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* @param response
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* @throws IOException
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*/
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public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass, String fileName
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, HttpServletResponse response) throws IOException {
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defaultExport(list, pojoClass, fileName, response, new ExportParams(title, sheetName, ExcelType.XSSF));
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}
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/**
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* 导出
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*
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* @param list 数据列表(元素是Map)
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* @param fileName 文件名
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* @param response
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* @throws IOException
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*/
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public static void exportExcel(List<Map<String, Object>> list, String fileName, HttpServletResponse response) throws IOException {
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defaultExport(list, fileName, response);
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}
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private static void defaultExport(List<?> list, Class<?> pojoClass, String fileName
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, HttpServletResponse response, ExportParams exportParams) throws IOException {
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Workbook workbook = ExcelExportUtil.exportExcel(exportParams, pojoClass, list);
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if (workbook != null) {
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downLoadExcel(fileName, response, workbook);
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}
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}
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private static void defaultExport(List<Map<String, Object>> list, String fileName, HttpServletResponse response) throws IOException {
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Workbook workbook = ExcelExportUtil.exportExcel(list, ExcelType.XSSF);
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if (workbook != null) {
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downLoadExcel(fileName, response, workbook);
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}
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}
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private static void downLoadExcel(String fileName, HttpServletResponse response, Workbook workbook) throws IOException {
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response.setCharacterEncoding("UTF-8");
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response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
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response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
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workbook.write(response.getOutputStream());
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}
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public static <T> List<T> importExcel(String filePath, Integer titleRows, Integer headerRows, Class<T> pojoClass) {
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if (StringUtils.isBlank(filePath)) {
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return Collections.emptyList();
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}
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ImportParams params = new ImportParams();
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params.setTitleRows(titleRows);
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params.setHeadRows(headerRows);
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return ExcelImportUtil.importExcel(new File(filePath), pojoClass, params);
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}
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public static <T> List<T> importExcel(MultipartFile file, Integer titleRows, Integer headerRows, Class<T> pojoClass) throws Exception {
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if (file == null) {
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return Collections.emptyList();
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}
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ImportParams params = new ImportParams();
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params.setTitleRows(titleRows);
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params.setHeadRows(headerRows);
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return ExcelImportUtil.importExcel(file.getInputStream(), pojoClass, params);
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}
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}
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