package com.panzhihua.common.utlis;
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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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import javax.servlet.http.HttpServletResponse;
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import org.apache.commons.lang3.StringUtils;
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import org.apache.poi.ss.usermodel.*;
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import org.springframework.web.multipart.MultipartFile;
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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 lombok.extern.slf4j.Slf4j;
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/**
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* Excel工具类
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*
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* @author manailin
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* @date 2019/1/6
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*/
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@Slf4j
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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
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* 数据列表
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* @param title
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* 标题
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* @param sheetName
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* sheet名称
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* @param pojoClass
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* 元素类型
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* @param fileName
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* 文件名
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* @param isCreateHeader
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* 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);
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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
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* 数据列表
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* @param title
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* 标题
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* @param sheetName
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* sheet名称
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* @param pojoClass
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* 元素类型
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* @param fileName
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* 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));
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}
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/**
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* 导出excel 带下拉列表的
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*
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* @param list
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* 数据列表
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* @param title
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* 标题
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* @param sheetName
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* sheet名称
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* @param pojoClass
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* 元素类型
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* @param fileName
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* 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 exportExcelForSelectList(List<?> list, String title, String sheetName, Class<?> pojoClass,
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String fileName, List<ExcelSelectObject> selectListObject, HttpServletResponse response) throws IOException {
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Workbook workbook = ExcelExportUtil.exportExcel(new ExportParams(title, sheetName), pojoClass, list);
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// 这里是自己加的 带下拉框的代码
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selectListObject.forEach(selectList -> ExcelSelectListUtil.selectList(workbook, selectList.getFirstCol(),
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selectList.getLastCol(), selectList.getStrings()));
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for (int i = 2; i < selectListObject.size(); i++) {
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Sheet sheet = workbook.getSheetAt(0);
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Row row = sheet.createRow(i);
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CellStyle style = workbook.createCellStyle();
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DataFormat format = workbook.createDataFormat();
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style.setDataFormat(format.getFormat("@"));
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row.setRowStyle(style);
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}
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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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/**
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* 导出
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*
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* @param list
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* 数据列表(元素是Map)
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* @param fileName
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* 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)
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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, HttpServletResponse response,
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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)
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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)
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throws IOException {
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response.setCharacterEncoding("UTF-8");
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response.setHeader("content-Type", "application/vnd.ms-excel");
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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)
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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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