使用POI和EasyExcel使用导入

1.使用POI导入

1.1导入依赖

        <dependency><groupId>org.apache.poi</groupId><artifactId>poi-ooxml</artifactId><version>4.1.2</version></dependency>

1.2创建工具类

package com.ruoyi.common.utils.poi;import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Workbook;/*** Excel数据格式处理适配器* * @author ruoyi*/
public interface ExcelHandlerAdapter
{/*** 格式化* * @param value 单元格数据值* @param args excel注解args参数组* @param cell 单元格对象* @param wb 工作簿对象** @return 处理后的值*/Object format(Object value, String[] args, Cell cell, Workbook wb);
}

package com.ruoyi.common.utils.poi;import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.ParameterizedType;
import java.math.BigDecimal;
import java.text.DecimalFormat;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Comparator;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.UUID;
import java.util.stream.Collectors;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.lang3.ArrayUtils;
import org.apache.commons.lang3.RegExUtils;
import org.apache.commons.lang3.reflect.FieldUtils;
import org.apache.poi.hssf.usermodel.HSSFClientAnchor;
import org.apache.poi.hssf.usermodel.HSSFPicture;
import org.apache.poi.hssf.usermodel.HSSFPictureData;
import org.apache.poi.hssf.usermodel.HSSFShape;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ooxml.POIXMLDocumentPart;
import org.apache.poi.ss.usermodel.BorderStyle;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.CellType;
import org.apache.poi.ss.usermodel.ClientAnchor;
import org.apache.poi.ss.usermodel.DataFormat;
import org.apache.poi.ss.usermodel.DataValidation;
import org.apache.poi.ss.usermodel.DataValidationConstraint;
import org.apache.poi.ss.usermodel.DataValidationHelper;
import org.apache.poi.ss.usermodel.DateUtil;
import org.apache.poi.ss.usermodel.Drawing;
import org.apache.poi.ss.usermodel.FillPatternType;
import org.apache.poi.ss.usermodel.Font;
import org.apache.poi.ss.usermodel.HorizontalAlignment;
import org.apache.poi.ss.usermodel.IndexedColors;
import org.apache.poi.ss.usermodel.Name;
import org.apache.poi.ss.usermodel.PictureData;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.VerticalAlignment;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.usermodel.WorkbookFactory;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.ss.util.CellRangeAddressList;
import org.apache.poi.util.IOUtils;
import org.apache.poi.xssf.streaming.SXSSFWorkbook;
import org.apache.poi.xssf.usermodel.XSSFClientAnchor;
import org.apache.poi.xssf.usermodel.XSSFDataValidation;
import org.apache.poi.xssf.usermodel.XSSFDrawing;
import org.apache.poi.xssf.usermodel.XSSFPicture;
import org.apache.poi.xssf.usermodel.XSSFShape;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.openxmlformats.schemas.drawingml.x2006.spreadsheetDrawing.CTMarker;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.ruoyi.common.annotation.Excel;
import com.ruoyi.common.annotation.Excel.ColumnType;
import com.ruoyi.common.annotation.Excel.Type;
import com.ruoyi.common.annotation.Excels;
import com.ruoyi.common.config.RuoYiConfig;
import com.ruoyi.common.core.domain.AjaxResult;
import com.ruoyi.common.core.text.Convert;
import com.ruoyi.common.exception.UtilException;
import com.ruoyi.common.utils.DateUtils;
import com.ruoyi.common.utils.DictUtils;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.common.utils.file.FileTypeUtils;
import com.ruoyi.common.utils.file.FileUtils;
import com.ruoyi.common.utils.file.ImageUtils;
import com.ruoyi.common.utils.reflect.ReflectUtils;/*** Excel相关处理* * @author ruoyi*/
public class ExcelUtil<T>
{private static final Logger log = LoggerFactory.getLogger(ExcelUtil.class);public static final String SEPARATOR = ",";public static final String FORMULA_REGEX_STR = "=|-|\\+|@";public static final String[] FORMULA_STR = { "=", "-", "+", "@" };/*** 用于dictType属性数据存储，避免重复查缓存*/public Map<String, String> sysDictMap = new HashMap<String, String>();/*** Excel sheet最大行数，默认65536*/public static final int sheetSize = 65536;/*** 工作表名称*/private String sheetName;/*** 导出类型（EXPORT:导出数据；IMPORT：导入模板）*/private Type type;/*** 工作薄对象*/private Workbook wb;/*** 工作表对象*/private Sheet sheet;/*** 样式列表*/private Map<String, CellStyle> styles;/*** 导入导出数据列表*/private List<T> list;/*** 注解列表*/private List<Object[]> fields;/*** 当前行号*/private int rownum;/*** 标题*/private String title;/*** 最大高度*/private short maxHeight;/*** 合并后最后行数*/private int subMergedLastRowNum = 0;/*** 合并后开始行数*/private int subMergedFirstRowNum = 1;/*** 对象的子列表方法*/private Method subMethod;/*** 对象的子列表属性*/private List<Field> subFields;/*** 统计列表*/private Map<Integer, Double> statistics = new HashMap<Integer, Double>();/*** 数字格式*/private static final DecimalFormat DOUBLE_FORMAT = new DecimalFormat("######0.00");/*** 实体对象*/public Class<T> clazz;/*** 需要显示列属性*/public String[] includeFields;/*** 需要排除列属性*/public String[] excludeFields;public ExcelUtil(Class<T> clazz){this.clazz = clazz;}/*** 仅在Excel中显示列属性** @param fields 列属性名 示例[单个"name"/多个"id","name"]*/public void showColumn(String... fields){this.includeFields = fields;}/*** 隐藏Excel中列属性** @param fields 列属性名 示例[单个"name"/多个"id","name"]*/public void hideColumn(String... fields){this.excludeFields = fields;}public void init(List<T> list, String sheetName, String title, Type type){if (list == null){list = new ArrayList<T>();}this.list = list;this.sheetName = sheetName;this.type = type;this.title = title;createExcelField();createWorkbook();createTitle();createSubHead();}/*** 创建excel第一行标题*/public void createTitle(){if (StringUtils.isNotEmpty(title)){int titleLastCol = this.fields.size() - 1;if (isSubList()){titleLastCol = titleLastCol + subFields.size() - 1;}Row titleRow = sheet.createRow(rownum == 0 ? rownum++ : 0);titleRow.setHeightInPoints(30);Cell titleCell = titleRow.createCell(0);titleCell.setCellStyle(styles.get("title"));titleCell.setCellValue(title);sheet.addMergedRegion(new CellRangeAddress(titleRow.getRowNum(), titleRow.getRowNum(), 0, titleLastCol));}}/*** 创建对象的子列表名称*/public void createSubHead(){if (isSubList()){Row subRow = sheet.createRow(rownum);int column = 0;int subFieldSize = subFields != null ? subFields.size() : 0;for (Object[] objects : fields){Field field = (Field) objects[0];Excel attr = (Excel) objects[1];if (Collection.class.isAssignableFrom(field.getType())){Cell cell = subRow.createCell(column);cell.setCellValue(attr.name());cell.setCellStyle(styles.get(StringUtils.format("header_{}_{}", attr.headerColor(), attr.headerBackgroundColor())));if (subFieldSize > 1){CellRangeAddress cellAddress = new CellRangeAddress(rownum, rownum, column, column + subFieldSize - 1);sheet.addMergedRegion(cellAddress);}column += subFieldSize;}else{Cell cell = subRow.createCell(column++);cell.setCellValue(attr.name());cell.setCellStyle(styles.get(StringUtils.format("header_{}_{}", attr.headerColor(), attr.headerBackgroundColor())));}}rownum++;}}/*** 对excel表单默认第一个索引名转换成list* * @param is 输入流* @return 转换后集合*/public List<T> importExcel(InputStream is){return importExcel(is, 0);}/*** 对excel表单默认第一个索引名转换成list* * @param is 输入流* @param titleNum 标题占用行数* @return 转换后集合*/public List<T> importExcel(InputStream is, int titleNum){List<T> list = null;try{list = importExcel(StringUtils.EMPTY, is, titleNum);}catch (Exception e){log.error("导入Excel异常{}", e.getMessage());throw new UtilException(e.getMessage());}finally{IOUtils.closeQuietly(is);}return list;}/*** 对excel表单指定表格索引名转换成list* * @param sheetName 表格索引名* @param titleNum 标题占用行数* @param is 输入流* @return 转换后集合*/public List<T> importExcel(String sheetName, InputStream is, int titleNum) throws Exception{this.type = Type.IMPORT;this.wb = WorkbookFactory.create(is);List<T> list = new ArrayList<T>();// 如果指定sheet名,则取指定sheet中的内容 否则默认指向第1个sheetSheet sheet = StringUtils.isNotEmpty(sheetName) ? wb.getSheet(sheetName) : wb.getSheetAt(0);if (sheet == null){throw new IOException("文件sheet不存在");}boolean isXSSFWorkbook = !(wb instanceof HSSFWorkbook);Map<String, List<PictureData>> pictures = null;if (isXSSFWorkbook){pictures = getSheetPictures07((XSSFSheet) sheet, (XSSFWorkbook) wb);}else{pictures = getSheetPictures03((HSSFSheet) sheet, (HSSFWorkbook) wb);}// 获取最后一个非空行的行下标，比如总行数为n，则返回的为n-1int rows = sheet.getLastRowNum();if (rows > 0){// 定义一个map用于存放excel列的序号和field.Map<String, Integer> cellMap = new HashMap<String, Integer>();// 获取表头Row heard = sheet.getRow(titleNum);for (int i = 0; i < heard.getPhysicalNumberOfCells(); i++){Cell cell = heard.getCell(i);if (StringUtils.isNotNull(cell)){String value = this.getCellValue(heard, i).toString();cellMap.put(value, i);}else{cellMap.put(null, i);}}// 有数据时才处理 得到类的所有field.List<Object[]> fields = this.getFields();Map<Integer, Object[]> fieldsMap = new HashMap<Integer, Object[]>();for (Object[] objects : fields){Excel attr = (Excel) objects[1];Integer column = cellMap.get(attr.name());if (column != null){fieldsMap.put(column, objects);}}for (int i = titleNum + 1; i <= rows; i++){// 从第2行开始取数据,默认第一行是表头.Row row = sheet.getRow(i);// 判断当前行是否是空行if (isRowEmpty(row)){continue;}T entity = null;for (Map.Entry<Integer, Object[]> entry : fieldsMap.entrySet()){Object val = this.getCellValue(row, entry.getKey());// 如果不存在实例则新建.entity = (entity == null ? clazz.newInstance() : entity);// 从map中得到对应列的field.Field field = (Field) entry.getValue()[0];Excel attr = (Excel) entry.getValue()[1];// 取得类型,并根据对象类型设置值.Class<?> fieldType = field.getType();if (String.class == fieldType){String s = Convert.toStr(val);if (StringUtils.endsWith(s, ".0")){val = StringUtils.substringBefore(s, ".0");}else{String dateFormat = field.getAnnotation(Excel.class).dateFormat();if (StringUtils.isNotEmpty(dateFormat)){val = parseDateToStr(dateFormat, val);}else{val = Convert.toStr(val);}}}else if ((Integer.TYPE == fieldType || Integer.class == fieldType) && StringUtils.isNumeric(Convert.toStr(val))){val = Convert.toInt(val);}else if ((Long.TYPE == fieldType || Long.class == fieldType) && StringUtils.isNumeric(Convert.toStr(val))){val = Convert.toLong(val);}else if (Double.TYPE == fieldType || Double.class == fieldType){val = Convert.toDouble(val);}else if (Float.TYPE == fieldType || Float.class == fieldType){val = Convert.toFloat(val);}else if (BigDecimal.class == fieldType){val = Convert.toBigDecimal(val);}else if (Date.class == fieldType){if (val instanceof String){val = DateUtils.parseDate(val);}else if (val instanceof Double){val = DateUtil.getJavaDate((Double) val);}}else if (Boolean.TYPE == fieldType || Boolean.class == fieldType){val = Convert.toBool(val, false);}if (StringUtils.isNotNull(fieldType)){String propertyName = field.getName();if (StringUtils.isNotEmpty(attr.targetAttr())){propertyName = field.getName() + "." + attr.targetAttr();}if (StringUtils.isNotEmpty(attr.readConverterExp())){val = reverseByExp(Convert.toStr(val), attr.readConverterExp(), attr.separator());}else if (StringUtils.isNotEmpty(attr.dictType())){if (!sysDictMap.containsKey(attr.dictType() + val)){String dictValue = reverseDictByExp(Convert.toStr(val), attr.dictType(), attr.separator());sysDictMap.put(attr.dictType() + val, dictValue);}val = sysDictMap.get(attr.dictType() + val);}else if (!attr.handler().equals(ExcelHandlerAdapter.class)){val = dataFormatHandlerAdapter(val, attr, null);}else if (ColumnType.IMAGE == attr.cellType() && StringUtils.isNotEmpty(pictures)){StringBuilder propertyString = new StringBuilder();List<PictureData> images = pictures.get(row.getRowNum() + "_" + entry.getKey());for (PictureData picture : images){byte[] data = picture.getData();String fileName = FileUtils.writeImportBytes(data);propertyString.append(fileName).append(SEPARATOR);}val = StringUtils.stripEnd(propertyString.toString(), SEPARATOR);}ReflectUtils.invokeSetter(entity, propertyName, val);}}list.add(entity);}}return list;}/*** 对list数据源将其里面的数据导入到excel表单* * @param list 导出数据集合* @param sheetName 工作表的名称* @return 结果*/public AjaxResult exportExcel(List<T> list, String sheetName){return exportExcel(list, sheetName, StringUtils.EMPTY);}/*** 对list数据源将其里面的数据导入到excel表单* * @param list 导出数据集合* @param sheetName 工作表的名称* @param title 标题* @return 结果*/public AjaxResult exportExcel(List<T> list, String sheetName, String title){this.init(list, sheetName, title, Type.EXPORT);return exportExcel();}/*** 对list数据源将其里面的数据导入到excel表单* * @param response 返回数据* @param list 导出数据集合* @param sheetName 工作表的名称* @return 结果*/public void exportExcel(HttpServletResponse response, List<T> list, String sheetName){exportExcel(response, list, sheetName, StringUtils.EMPTY);}/*** 对list数据源将其里面的数据导入到excel表单* * @param response 返回数据* @param list 导出数据集合* @param sheetName 工作表的名称* @param title 标题* @return 结果*/public void exportExcel(HttpServletResponse response, List<T> list, String sheetName, String title){response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");response.setCharacterEncoding("utf-8");this.init(list, sheetName, title, Type.EXPORT);exportExcel(response);}/*** 对list数据源将其里面的数据导入到excel表单* * @param sheetName 工作表的名称* @return 结果*/public AjaxResult importTemplateExcel(String sheetName){return importTemplateExcel(sheetName, StringUtils.EMPTY);}/*** 对list数据源将其里面的数据导入到excel表单* * @param sheetName 工作表的名称* @param title 标题* @return 结果*/public AjaxResult importTemplateExcel(String sheetName, String title){this.init(null, sheetName, title, Type.IMPORT);return exportExcel();}/*** 对list数据源将其里面的数据导入到excel表单* * @param sheetName 工作表的名称* @return 结果*/public void importTemplateExcel(HttpServletResponse response, String sheetName){importTemplateExcel(response, sheetName, StringUtils.EMPTY);}/*** 对list数据源将其里面的数据导入到excel表单* * @param sheetName 工作表的名称* @param title 标题* @return 结果*/public void importTemplateExcel(HttpServletResponse response, String sheetName, String title){response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");response.setCharacterEncoding("utf-8");this.init(null, sheetName, title, Type.IMPORT);exportExcel(response);}/*** 对list数据源将其里面的数据导入到excel表单* * @return 结果*/public void exportExcel(HttpServletResponse response){try{writeSheet();wb.write(response.getOutputStream());}catch (Exception e){log.error("导出Excel异常{}", e.getMessage());}finally{IOUtils.closeQuietly(wb);}}/*** 对list数据源将其里面的数据导入到excel表单* * @return 结果*/public AjaxResult exportExcel(){OutputStream out = null;try{writeSheet();String filename = encodingFilename(sheetName);out = new FileOutputStream(getAbsoluteFile(filename));wb.write(out);return AjaxResult.success(filename);}catch (Exception e){log.error("导出Excel异常{}", e.getMessage());throw new UtilException("导出Excel失败，请联系网站管理员！");}finally{IOUtils.closeQuietly(wb);IOUtils.closeQuietly(out);}}/*** 创建写入数据到Sheet*/public void writeSheet(){// 取出一共有多少个sheet.int sheetNo = Math.max(1, (int) Math.ceil(list.size() * 1.0 / sheetSize));for (int index = 0; index < sheetNo; index++){createSheet(sheetNo, index);// 产生一行Row row = sheet.createRow(rownum);int column = 0;// 写入各个字段的列头名称for (Object[] os : fields){Field field = (Field) os[0];Excel excel = (Excel) os[1];if (Collection.class.isAssignableFrom(field.getType())){for (Field subField : subFields){Excel subExcel = subField.getAnnotation(Excel.class);this.createHeadCell(subExcel, row, column++);}}else{this.createHeadCell(excel, row, column++);}}if (Type.EXPORT.equals(type)){fillExcelData(index, row);addStatisticsRow();}}}/*** 填充excel数据* * @param index 序号* @param row 单元格行*/@SuppressWarnings("unchecked")public void fillExcelData(int index, Row row){int startNo = index * sheetSize;int endNo = Math.min(startNo + sheetSize, list.size());int currentRowNum = rownum + 1; // 从标题行后开始for (int i = startNo; i < endNo; i++){row = sheet.createRow(currentRowNum);T vo = (T) list.get(i);int column = 0;int maxSubListSize = getCurrentMaxSubListSize(vo);for (Object[] os : fields){Field field = (Field) os[0];Excel excel = (Excel) os[1];if (Collection.class.isAssignableFrom(field.getType())){try{Collection<?> subList = (Collection<?>) getTargetValue(vo, field, excel);if (subList != null && !subList.isEmpty()){int subIndex = 0;for (Object subVo : subList){Row subRow = sheet.getRow(currentRowNum + subIndex);if (subRow == null){subRow = sheet.createRow(currentRowNum + subIndex);}int subColumn = column;for (Field subField : subFields){Excel subExcel = subField.getAnnotation(Excel.class);addCell(subExcel, subRow, (T) subVo, subField, subColumn++);}subIndex++;}column += subFields.size();}}catch (Exception e){log.error("填充集合数据失败", e);}}else{// 创建单元格并设置值addCell(excel, row, vo, field, column);if (maxSubListSize > 1 && excel.needMerge()){sheet.addMergedRegion(new CellRangeAddress(currentRowNum, currentRowNum + maxSubListSize - 1, column, column));}column++;}}currentRowNum += maxSubListSize;}}/*** 获取子列表最大数*/private int getCurrentMaxSubListSize(T vo){int maxSubListSize = 1;for (Object[] os : fields){Field field = (Field) os[0];if (Collection.class.isAssignableFrom(field.getType())){try{Collection<?> subList = (Collection<?>) getTargetValue(vo, field, (Excel) os[1]);if (subList != null && !subList.isEmpty()){maxSubListSize = Math.max(maxSubListSize, subList.size());}}catch (Exception e){log.error("获取集合大小失败", e);}}}return maxSubListSize;}/*** 创建表格样式* * @param wb 工作薄对象* @return 样式列表*/private Map<String, CellStyle> createStyles(Workbook wb){// 写入各条记录,每条记录对应excel表中的一行Map<String, CellStyle> styles = new HashMap<String, CellStyle>();CellStyle style = wb.createCellStyle();style.setAlignment(HorizontalAlignment.CENTER);style.setVerticalAlignment(VerticalAlignment.CENTER);Font titleFont = wb.createFont();titleFont.setFontName("Arial");titleFont.setFontHeightInPoints((short) 16);titleFont.setBold(true);style.setFont(titleFont);DataFormat dataFormat = wb.createDataFormat();style.setDataFormat(dataFormat.getFormat("@"));styles.put("title", style);style = wb.createCellStyle();style.setAlignment(HorizontalAlignment.CENTER);style.setVerticalAlignment(VerticalAlignment.CENTER);style.setBorderRight(BorderStyle.THIN);style.setRightBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());style.setBorderLeft(BorderStyle.THIN);style.setLeftBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());style.setBorderTop(BorderStyle.THIN);style.setTopBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());style.setBorderBottom(BorderStyle.THIN);style.setBottomBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());Font dataFont = wb.createFont();dataFont.setFontName("Arial");dataFont.setFontHeightInPoints((short) 10);style.setFont(dataFont);styles.put("data", style);style = wb.createCellStyle();style.setAlignment(HorizontalAlignment.CENTER);style.setVerticalAlignment(VerticalAlignment.CENTER);Font totalFont = wb.createFont();totalFont.setFontName("Arial");totalFont.setFontHeightInPoints((short) 10);style.setFont(totalFont);styles.put("total", style);styles.putAll(annotationHeaderStyles(wb, styles));styles.putAll(annotationDataStyles(wb));return styles;}/*** 根据Excel注解创建表格头样式* * @param wb 工作薄对象* @return 自定义样式列表*/private Map<String, CellStyle> annotationHeaderStyles(Workbook wb, Map<String, CellStyle> styles){Map<String, CellStyle> headerStyles = new HashMap<String, CellStyle>();for (Object[] os : fields){Excel excel = (Excel) os[1];String key = StringUtils.format("header_{}_{}", excel.headerColor(), excel.headerBackgroundColor());if (!headerStyles.containsKey(key)){CellStyle style = wb.createCellStyle();style.cloneStyleFrom(styles.get("data"));style.setAlignment(HorizontalAlignment.CENTER);style.setVerticalAlignment(VerticalAlignment.CENTER);style.setFillForegroundColor(excel.headerBackgroundColor().index);style.setFillPattern(FillPatternType.SOLID_FOREGROUND);Font headerFont = wb.createFont();headerFont.setFontName("Arial");headerFont.setFontHeightInPoints((short) 10);headerFont.setBold(true);headerFont.setColor(excel.headerColor().index);style.setFont(headerFont);// 设置表格头单元格文本形式DataFormat dataFormat = wb.createDataFormat();style.setDataFormat(dataFormat.getFormat("@"));headerStyles.put(key, style);}}return headerStyles;}/*** 根据Excel注解创建表格列样式* * @param wb 工作薄对象* @return 自定义样式列表*/private Map<String, CellStyle> annotationDataStyles(Workbook wb){Map<String, CellStyle> styles = new HashMap<String, CellStyle>();for (Object[] os : fields){Field field = (Field) os[0];Excel excel = (Excel) os[1];if (Collection.class.isAssignableFrom(field.getType())){ParameterizedType pt = (ParameterizedType) field.getGenericType();Class<?> subClass = (Class<?>) pt.getActualTypeArguments()[0];List<Field> subFields = FieldUtils.getFieldsListWithAnnotation(subClass, Excel.class);for (Field subField : subFields){Excel subExcel = subField.getAnnotation(Excel.class);annotationDataStyles(styles, subField, subExcel);}}else{annotationDataStyles(styles, field, excel);}}return styles;}/*** 根据Excel注解创建表格列样式* * @param styles 自定义样式列表* @param field  属性列信息* @param excel  注解信息*/public void annotationDataStyles(Map<String, CellStyle> styles, Field field, Excel excel){String key = StringUtils.format("data_{}_{}_{}_{}_{}", excel.align(), excel.color(), excel.backgroundColor(), excel.cellType(), excel.wrapText());if (!styles.containsKey(key)){CellStyle style = wb.createCellStyle();style.setAlignment(excel.align());style.setVerticalAlignment(VerticalAlignment.CENTER);style.setBorderRight(BorderStyle.THIN);style.setRightBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());style.setBorderLeft(BorderStyle.THIN);style.setLeftBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());style.setBorderTop(BorderStyle.THIN);style.setTopBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());style.setBorderBottom(BorderStyle.THIN);style.setBottomBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());style.setFillPattern(FillPatternType.SOLID_FOREGROUND);style.setFillForegroundColor(excel.backgroundColor().getIndex());style.setWrapText(excel.wrapText());Font dataFont = wb.createFont();dataFont.setFontName("Arial");dataFont.setFontHeightInPoints((short) 10);dataFont.setColor(excel.color().index);style.setFont(dataFont);if (ColumnType.TEXT == excel.cellType()){DataFormat dataFormat = wb.createDataFormat();style.setDataFormat(dataFormat.getFormat("@"));}styles.put(key, style);}}/*** 创建单元格*/public Cell createHeadCell(Excel attr, Row row, int column){// 创建列Cell cell = row.createCell(column);// 写入列信息cell.setCellValue(attr.name());setDataValidation(attr, row, column);cell.setCellStyle(styles.get(StringUtils.format("header_{}_{}", attr.headerColor(), attr.headerBackgroundColor())));if (isSubList()){// 填充默认样式，防止合并单元格样式失效sheet.setDefaultColumnStyle(column, styles.get(StringUtils.format("data_{}_{}_{}_{}_{}", attr.align(), attr.color(), attr.backgroundColor(), attr.cellType(), attr.wrapText())));if (attr.needMerge()){sheet.addMergedRegion(new CellRangeAddress(rownum - 1, rownum, column, column));}}return cell;}/*** 设置单元格信息* * @param value 单元格值* @param attr 注解相关* @param cell 单元格信息*/public void setCellVo(Object value, Excel attr, Cell cell){if (ColumnType.STRING == attr.cellType() || ColumnType.TEXT == attr.cellType()){String cellValue = Convert.toStr(value);// 对于任何以表达式触发字符 =-+@开头的单元格，直接使用tab字符作为前缀，防止CSV注入。if (StringUtils.startsWithAny(cellValue, FORMULA_STR)){cellValue = RegExUtils.replaceFirst(cellValue, FORMULA_REGEX_STR, "\t$0");}if (value instanceof Collection && StringUtils.equals("[]", cellValue)){cellValue = StringUtils.EMPTY;}cell.setCellValue(StringUtils.isNull(cellValue) ? attr.defaultValue() : cellValue + attr.suffix());}else if (ColumnType.NUMERIC == attr.cellType()){if (StringUtils.isNotNull(value)){cell.setCellValue(StringUtils.contains(Convert.toStr(value), ".") ? Convert.toDouble(value) : Convert.toInt(value));}}else if (ColumnType.IMAGE == attr.cellType()){ClientAnchor anchor = new XSSFClientAnchor(0, 0, 0, 0, (short) cell.getColumnIndex(), cell.getRow().getRowNum(), (short) (cell.getColumnIndex() + 1), cell.getRow().getRowNum() + 1);String propertyValue = Convert.toStr(value);if (StringUtils.isNotEmpty(propertyValue)){List<String> imagePaths = StringUtils.str2List(propertyValue, SEPARATOR);for (String imagePath : imagePaths){byte[] data = ImageUtils.getImage(imagePath);getDrawingPatriarch(cell.getSheet()).createPicture(anchor, cell.getSheet().getWorkbook().addPicture(data, getImageType(data)));}}}}/*** 获取画布*/public static Drawing<?> getDrawingPatriarch(Sheet sheet){if (sheet.getDrawingPatriarch() == null){sheet.createDrawingPatriarch();}return sheet.getDrawingPatriarch();}/*** 获取图片类型,设置图片插入类型*/public int getImageType(byte[] value){String type = FileTypeUtils.getFileExtendName(value);if ("JPG".equalsIgnoreCase(type)){return Workbook.PICTURE_TYPE_JPEG;}else if ("PNG".equalsIgnoreCase(type)){return Workbook.PICTURE_TYPE_PNG;}return Workbook.PICTURE_TYPE_JPEG;}/*** 创建表格样式*/public void setDataValidation(Excel attr, Row row, int column){if (attr.name().indexOf("注：") >= 0){sheet.setColumnWidth(column, 6000);}else{// 设置列宽sheet.setColumnWidth(column, (int) ((attr.width() + 0.72) * 256));}if (StringUtils.isNotEmpty(attr.prompt()) || attr.combo().length > 0 || attr.comboReadDict()){String[] comboArray = attr.combo();if (attr.comboReadDict()){if (!sysDictMap.containsKey("combo_" + attr.dictType())){String labels = DictUtils.getDictLabels(attr.dictType());sysDictMap.put("combo_" + attr.dictType(), labels);}String val = sysDictMap.get("combo_" + attr.dictType());comboArray = StringUtils.split(val, DictUtils.SEPARATOR);}if (comboArray.length > 15 || StringUtils.join(comboArray).length() > 255){// 如果下拉数大于15或字符串长度大于255，则使用一个新sheet存储，避免生成的模板下拉值获取不到setXSSFValidationWithHidden(sheet, comboArray, attr.prompt(), 1, 100, column, column);}else{// 提示信息或只能选择不能输入的列内容.setPromptOrValidation(sheet, comboArray, attr.prompt(), 1, 100, column, column);}}}/*** 添加单元格*/public Cell addCell(Excel attr, Row row, T vo, Field field, int column){Cell cell = null;try{// 设置行高row.setHeight(maxHeight);// 根据Excel中设置情况决定是否导出,有些情况需要保持为空,希望用户填写这一列.if (attr.isExport()){// 创建cellcell = row.createCell(column);if (isSubListValue(vo) && getListCellValue(vo).size() > 1 && attr.needMerge()){if (subMergedLastRowNum >= subMergedFirstRowNum){sheet.addMergedRegion(new CellRangeAddress(subMergedFirstRowNum, subMergedLastRowNum, column, column));}}cell.setCellStyle(styles.get(StringUtils.format("data_{}_{}_{}_{}_{}", attr.align(), attr.color(), attr.backgroundColor(), attr.cellType(), attr.wrapText())));// 用于读取对象中的属性Object value = getTargetValue(vo, field, attr);String dateFormat = attr.dateFormat();String readConverterExp = attr.readConverterExp();String separator = attr.separator();String dictType = attr.dictType();if (StringUtils.isNotEmpty(dateFormat) && StringUtils.isNotNull(value)){cell.getCellStyle().setDataFormat(this.wb.getCreationHelper().createDataFormat().getFormat(dateFormat));cell.setCellValue(parseDateToStr(dateFormat, value));}else if (StringUtils.isNotEmpty(readConverterExp) && StringUtils.isNotNull(value)){cell.setCellValue(convertByExp(Convert.toStr(value), readConverterExp, separator));}else if (StringUtils.isNotEmpty(dictType) && StringUtils.isNotNull(value)){if (!sysDictMap.containsKey(dictType + value)){String lable = convertDictByExp(Convert.toStr(value), dictType, separator);sysDictMap.put(dictType + value, lable);}cell.setCellValue(sysDictMap.get(dictType + value));}else if (value instanceof BigDecimal && -1 != attr.scale()){cell.setCellValue((((BigDecimal) value).setScale(attr.scale(), attr.roundingMode())).doubleValue());}else if (!attr.handler().equals(ExcelHandlerAdapter.class)){cell.setCellValue(dataFormatHandlerAdapter(value, attr, cell));}else{// 设置列类型setCellVo(value, attr, cell);}addStatisticsData(column, Convert.toStr(value), attr);}}catch (Exception e){log.error("导出Excel失败{}", e);}return cell;}/*** 设置 POI XSSFSheet 单元格提示或选择框* * @param sheet 表单* @param textlist 下拉框显示的内容* @param promptContent 提示内容* @param firstRow 开始行* @param endRow 结束行* @param firstCol 开始列* @param endCol 结束列*/public void setPromptOrValidation(Sheet sheet, String[] textlist, String promptContent, int firstRow, int endRow,int firstCol, int endCol){DataValidationHelper helper = sheet.getDataValidationHelper();DataValidationConstraint constraint = textlist.length > 0 ? helper.createExplicitListConstraint(textlist) : helper.createCustomConstraint("DD1");CellRangeAddressList regions = new CellRangeAddressList(firstRow, endRow, firstCol, endCol);DataValidation dataValidation = helper.createValidation(constraint, regions);if (StringUtils.isNotEmpty(promptContent)){// 如果设置了提示信息则鼠标放上去提示dataValidation.createPromptBox("", promptContent);dataValidation.setShowPromptBox(true);}// 处理Excel兼容性问题if (dataValidation instanceof XSSFDataValidation){dataValidation.setSuppressDropDownArrow(true);dataValidation.setShowErrorBox(true);}else{dataValidation.setSuppressDropDownArrow(false);}sheet.addValidationData(dataValidation);}/*** 设置某些列的值只能输入预制的数据,显示下拉框（兼容超出一定数量的下拉框）.* * @param sheet 要设置的sheet.* @param textlist 下拉框显示的内容* @param promptContent 提示内容* @param firstRow 开始行* @param endRow 结束行* @param firstCol 开始列* @param endCol 结束列*/public void setXSSFValidationWithHidden(Sheet sheet, String[] textlist, String promptContent, int firstRow, int endRow, int firstCol, int endCol){String hideSheetName = "combo_" + firstCol + "_" + endCol;Sheet hideSheet = wb.createSheet(hideSheetName); // 用于存储 下拉菜单数据for (int i = 0; i < textlist.length; i++){hideSheet.createRow(i).createCell(0).setCellValue(textlist[i]);}// 创建名称，可被其他单元格引用Name name = wb.createName();name.setNameName(hideSheetName + "_data");name.setRefersToFormula(hideSheetName + "!$A$1:$A$" + textlist.length);DataValidationHelper helper = sheet.getDataValidationHelper();// 加载下拉列表内容DataValidationConstraint constraint = helper.createFormulaListConstraint(hideSheetName + "_data");// 设置数据有效性加载在哪个单元格上,四个参数分别是：起始行、终止行、起始列、终止列CellRangeAddressList regions = new CellRangeAddressList(firstRow, endRow, firstCol, endCol);// 数据有效性对象DataValidation dataValidation = helper.createValidation(constraint, regions);if (StringUtils.isNotEmpty(promptContent)){// 如果设置了提示信息则鼠标放上去提示dataValidation.createPromptBox("", promptContent);dataValidation.setShowPromptBox(true);}// 处理Excel兼容性问题if (dataValidation instanceof XSSFDataValidation){dataValidation.setSuppressDropDownArrow(true);dataValidation.setShowErrorBox(true);}else{dataValidation.setSuppressDropDownArrow(false);}sheet.addValidationData(dataValidation);// 设置hiddenSheet隐藏wb.setSheetHidden(wb.getSheetIndex(hideSheet), true);}/*** 解析导出值 0=男,1=女,2=未知* * @param propertyValue 参数值* @param converterExp 翻译注解* @param separator 分隔符* @return 解析后值*/public static String convertByExp(String propertyValue, String converterExp, String separator){StringBuilder propertyString = new StringBuilder();String[] convertSource = converterExp.split(SEPARATOR);for (String item : convertSource){String[] itemArray = item.split("=");if (StringUtils.containsAny(propertyValue, separator)){for (String value : propertyValue.split(separator)){if (itemArray[0].equals(value)){propertyString.append(itemArray[1] + separator);break;}}}else{if (itemArray[0].equals(propertyValue)){return itemArray[1];}}}return StringUtils.stripEnd(propertyString.toString(), separator);}/*** 反向解析值 男=0,女=1,未知=2* * @param propertyValue 参数值* @param converterExp 翻译注解* @param separator 分隔符* @return 解析后值*/public static String reverseByExp(String propertyValue, String converterExp, String separator){StringBuilder propertyString = new StringBuilder();String[] convertSource = converterExp.split(SEPARATOR);for (String item : convertSource){String[] itemArray = item.split("=");if (StringUtils.containsAny(propertyValue, separator)){for (String value : propertyValue.split(separator)){if (itemArray[1].equals(value)){propertyString.append(itemArray[0] + separator);break;}}}else{if (itemArray[1].equals(propertyValue)){return itemArray[0];}}}return StringUtils.stripEnd(propertyString.toString(), separator);}/*** 解析字典值* * @param dictValue 字典值* @param dictType 字典类型* @param separator 分隔符* @return 字典标签*/public static String convertDictByExp(String dictValue, String dictType, String separator){return DictUtils.getDictLabel(dictType, dictValue, separator);}/*** 反向解析值字典值* * @param dictLabel 字典标签* @param dictType 字典类型* @param separator 分隔符* @return 字典值*/public static String reverseDictByExp(String dictLabel, String dictType, String separator){return DictUtils.getDictValue(dictType, dictLabel, separator);}/*** 数据处理器* * @param value 数据值* @param excel 数据注解* @return*/public String dataFormatHandlerAdapter(Object value, Excel excel, Cell cell){try{Object instance = excel.handler().newInstance();Method formatMethod = excel.handler().getMethod("format", new Class[] { Object.class, String[].class, Cell.class, Workbook.class });value = formatMethod.invoke(instance, value, excel.args(), cell, this.wb);}catch (Exception e){log.error("不能格式化数据 " + excel.handler(), e.getMessage());}return Convert.toStr(value);}/*** 合计统计信息*/private void addStatisticsData(Integer index, String text, Excel entity){if (entity != null && entity.isStatistics()){Double temp = 0D;if (!statistics.containsKey(index)){statistics.put(index, temp);}try{temp = Double.valueOf(text);}catch (NumberFormatException e){}statistics.put(index, statistics.get(index) + temp);}}/*** 创建统计行*/public void addStatisticsRow(){if (statistics.size() > 0){Row row = sheet.createRow(sheet.getLastRowNum() + 1);Set<Integer> keys = statistics.keySet();Cell cell = row.createCell(0);cell.setCellStyle(styles.get("total"));cell.setCellValue("合计");for (Integer key : keys){cell = row.createCell(key);cell.setCellStyle(styles.get("total"));cell.setCellValue(DOUBLE_FORMAT.format(statistics.get(key)));}statistics.clear();}}/*** 编码文件名*/public String encodingFilename(String filename){return UUID.randomUUID() + "_" + filename + ".xlsx";}/*** 获取下载路径* * @param filename 文件名称*/public String getAbsoluteFile(String filename){String downloadPath = RuoYiConfig.getDownloadPath() + filename;File desc = new File(downloadPath);if (!desc.getParentFile().exists()){desc.getParentFile().mkdirs();}return downloadPath;}/*** 获取bean中的属性值* * @param vo 实体对象* @param field 字段* @param excel 注解* @return 最终的属性值* @throws Exception*/private Object getTargetValue(T vo, Field field, Excel excel) throws Exception{field.setAccessible(true);Object o = field.get(vo);if (StringUtils.isNotEmpty(excel.targetAttr())){String target = excel.targetAttr();if (target.contains(".")){String[] targets = target.split("[.]");for (String name : targets){o = getValue(o, name);}}else{o = getValue(o, target);}}return o;}/*** 以类的属性的get方法方法形式获取值* * @param o* @param name* @return value* @throws Exception*/private Object getValue(Object o, String name) throws Exception{if (StringUtils.isNotNull(o) && StringUtils.isNotEmpty(name)){Class<?> clazz = o.getClass();Field field = clazz.getDeclaredField(name);field.setAccessible(true);o = field.get(o);}return o;}/*** 得到所有定义字段*/private void createExcelField(){this.fields = getFields();this.fields = this.fields.stream().sorted(Comparator.comparing(objects -> ((Excel) objects[1]).sort())).collect(Collectors.toList());this.maxHeight = getRowHeight();}/*** 获取字段注解信息*/public List<Object[]> getFields(){List<Object[]> fields = new ArrayList<Object[]>();List<Field> tempFields = new ArrayList<>();tempFields.addAll(Arrays.asList(clazz.getSuperclass().getDeclaredFields()));tempFields.addAll(Arrays.asList(clazz.getDeclaredFields()));if (StringUtils.isNotEmpty(includeFields)){for (Field field : tempFields){if (ArrayUtils.contains(this.includeFields, field.getName()) || field.isAnnotationPresent(Excels.class)){addField(fields, field);}}}else if (StringUtils.isNotEmpty(excludeFields)){for (Field field : tempFields){if (!ArrayUtils.contains(this.excludeFields, field.getName())){addField(fields, field);}}}else{for (Field field : tempFields){addField(fields, field);}}return fields;}/*** 添加字段信息*/public void addField(List<Object[]> fields, Field field){// 单注解if (field.isAnnotationPresent(Excel.class)){Excel attr = field.getAnnotation(Excel.class);if (attr != null && (attr.type() == Type.ALL || attr.type() == type)){fields.add(new Object[] { field, attr });}if (Collection.class.isAssignableFrom(field.getType())){subMethod = getSubMethod(field.getName(), clazz);ParameterizedType pt = (ParameterizedType) field.getGenericType();Class<?> subClass = (Class<?>) pt.getActualTypeArguments()[0];this.subFields = FieldUtils.getFieldsListWithAnnotation(subClass, Excel.class);}}// 多注解if (field.isAnnotationPresent(Excels.class)){Excels attrs = field.getAnnotation(Excels.class);Excel[] excels = attrs.value();for (Excel attr : excels){if (StringUtils.isNotEmpty(includeFields)){if (ArrayUtils.contains(this.includeFields, field.getName() + "." + attr.targetAttr())&& (attr != null && (attr.type() == Type.ALL || attr.type() == type))){fields.add(new Object[] { field, attr });}}else{if (!ArrayUtils.contains(this.excludeFields, field.getName() + "." + attr.targetAttr())&& (attr != null && (attr.type() == Type.ALL || attr.type() == type))){fields.add(new Object[] { field, attr });}}}}}/*** 根据注解获取最大行高*/public short getRowHeight(){double maxHeight = 0;for (Object[] os : this.fields){Excel excel = (Excel) os[1];maxHeight = Math.max(maxHeight, excel.height());}return (short) (maxHeight * 20);}/*** 创建一个工作簿*/public void createWorkbook(){this.wb = new SXSSFWorkbook(500);this.sheet = wb.createSheet();wb.setSheetName(0, sheetName);this.styles = createStyles(wb);}/*** 创建工作表* * @param sheetNo sheet数量* @param index 序号*/public void createSheet(int sheetNo, int index){// 设置工作表的名称.if (sheetNo > 1 && index > 0){this.sheet = wb.createSheet();this.createTitle();wb.setSheetName(index, sheetName + index);}}/*** 获取单元格值* * @param row 获取的行* @param column 获取单元格列号* @return 单元格值*/public Object getCellValue(Row row, int column){if (row == null){return row;}Object val = "";try{Cell cell = row.getCell(column);if (StringUtils.isNotNull(cell)){if (cell.getCellType() == CellType.NUMERIC || cell.getCellType() == CellType.FORMULA){val = cell.getNumericCellValue();if (DateUtil.isCellDateFormatted(cell)){val = DateUtil.getJavaDate((Double) val); // POI Excel 日期格式转换}else{if ((Double) val % 1 != 0){val = new BigDecimal(val.toString());}else{val = new DecimalFormat("0").format(val);}}}else if (cell.getCellType() == CellType.STRING){val = cell.getStringCellValue();}else if (cell.getCellType() == CellType.BOOLEAN){val = cell.getBooleanCellValue();}else if (cell.getCellType() == CellType.ERROR){val = cell.getErrorCellValue();}}}catch (Exception e){return val;}return val;}/*** 判断是否是空行* * @param row 判断的行* @return*/private boolean isRowEmpty(Row row){if (row == null){return true;}for (int i = row.getFirstCellNum(); i < row.getLastCellNum(); i++){Cell cell = row.getCell(i);if (cell != null && cell.getCellType() != CellType.BLANK){return false;}}return true;}/*** 获取Excel2003图片** @param sheet 当前sheet对象* @param workbook 工作簿对象* @return Map key:图片单元格索引（1_1）String，value:图片流PictureData*/public static Map<String, List<PictureData>> getSheetPictures03(HSSFSheet sheet, HSSFWorkbook workbook){Map<String, List<PictureData>> sheetIndexPicMap = new HashMap<>();List<HSSFPictureData> pictures = workbook.getAllPictures();if (!pictures.isEmpty() && sheet.getDrawingPatriarch() != null){for (HSSFShape shape : sheet.getDrawingPatriarch().getChildren()){if (shape instanceof HSSFPicture){HSSFPicture pic = (HSSFPicture) shape;HSSFClientAnchor anchor = (HSSFClientAnchor) pic.getAnchor();String picIndex = anchor.getRow1() + "_" + anchor.getCol1();sheetIndexPicMap.computeIfAbsent(picIndex, k -> new ArrayList<>()).add(pic.getPictureData());}}}return sheetIndexPicMap;}/*** 获取Excel2007图片** @param sheet 当前sheet对象* @param workbook 工作簿对象* @return Map key:图片单元格索引（1_1）String，value:图片流PictureData*/public static Map<String, List<PictureData>> getSheetPictures07(XSSFSheet sheet, XSSFWorkbook workbook){Map<String, List<PictureData>> sheetIndexPicMap = new HashMap<>();for (POIXMLDocumentPart dr : sheet.getRelations()){if (dr instanceof XSSFDrawing){XSSFDrawing drawing = (XSSFDrawing) dr;for (XSSFShape shape : drawing.getShapes()){if (shape instanceof XSSFPicture){XSSFPicture pic = (XSSFPicture) shape;XSSFClientAnchor anchor = pic.getPreferredSize();CTMarker ctMarker = anchor.getFrom();String picIndex = ctMarker.getRow() + "_" + ctMarker.getCol();sheetIndexPicMap.computeIfAbsent(picIndex, k -> new ArrayList<>()).add(pic.getPictureData());}}}}return sheetIndexPicMap;}/*** 格式化不同类型的日期对象* * @param dateFormat 日期格式* @param val 被格式化的日期对象* @return 格式化后的日期字符*/public String parseDateToStr(String dateFormat, Object val){if (val == null){return "";}String str;if (val instanceof Date){str = DateUtils.parseDateToStr(dateFormat, (Date) val);}else if (val instanceof LocalDateTime){str = DateUtils.parseDateToStr(dateFormat, DateUtils.toDate((LocalDateTime) val));}else if (val instanceof LocalDate){str = DateUtils.parseDateToStr(dateFormat, DateUtils.toDate((LocalDate) val));}else{str = val.toString();}return str;}/*** 是否有对象的子列表*/public boolean isSubList(){return StringUtils.isNotNull(subFields) && subFields.size() > 0;}/*** 是否有对象的子列表，集合不为空*/public boolean isSubListValue(T vo){return StringUtils.isNotNull(subFields) && subFields.size() > 0 && StringUtils.isNotNull(getListCellValue(vo)) && getListCellValue(vo).size() > 0;}/*** 获取集合的值*/public Collection<?> getListCellValue(Object obj){Object value;try{value = subMethod.invoke(obj, new Object[] {});}catch (Exception e){return new ArrayList<Object>();}return (Collection<?>) value;}/*** 获取对象的子列表方法* * @param name 名称* @param pojoClass 类对象* @return 子列表方法*/public Method getSubMethod(String name, Class<?> pojoClass){StringBuffer getMethodName = new StringBuffer("get");getMethodName.append(name.substring(0, 1).toUpperCase());getMethodName.append(name.substring(1));Method method = null;try{method = pojoClass.getMethod(getMethodName.toString(), new Class[] {});}catch (Exception e){log.error("获取对象异常{}", e.getMessage());}return method;}
}

1.3实现导入导出

@PostMapping("/import")public AjaxResult excelImport(MultipartFile file) throws Exception {ExcelUtil<Sku> util = new ExcelUtil<Sku>(Sku.class);List<Sku> skuList = util.importExcel(file.getInputStream());return toAjax(skuService.insertSkus(skuList));}@PostMapping("/export")public void export(HttpServletResponse response, Sku sku) {List<Sku> list = skuService.selectSkuList(sku);ExcelUtil<Sku> util = new ExcelUtil<Sku>(Sku.class);util.exportExcel(response, list, "商品管理数据");}

2.使用easyexcel

2.1导入依赖

<!--  excel处理工具-->
<dependency><groupId>com.alibaba</groupId><artifactId>easyexcel</artifactId><version>4.0.1</version>
</dependency>

 2.2 ExcelUtil.java新增easyexcel导出导入方法

/*** 对excel表单默认第一个索引名转换成list（EasyExcel）* * @param is 输入流* @return 转换后集合*/
public List<T> importEasyExcel(InputStream is) throws Exception
{return EasyExcel.read(is).head(clazz).sheet().doReadSync();
}/*** 对list数据源将其里面的数据导入到excel表单（EasyExcel）* * @param list 导出数据集合* @param sheetName 工作表的名称* @return 结果*/
public void exportEasyExcel(HttpServletResponse response, List<T> list, String sheetName)
{try{EasyExcel.write(response.getOutputStream(), clazz).sheet(sheetName).doWrite(list);}catch (IOException e){log.error("导出EasyExcel异常{}", e.getMessage());}
}

2.3修改实体类

package com.dkd.manage.domain;import com.alibaba.excel.annotation.ExcelIgnoreUnannotated;
import com.alibaba.excel.annotation.ExcelProperty;
import com.alibaba.excel.annotation.write.style.ColumnWidth;
import com.alibaba.excel.annotation.write.style.HeadFontStyle;
import com.alibaba.excel.annotation.write.style.HeadRowHeight;
import com.dkd.common.annotation.Excel;
import com.dkd.common.core.domain.BaseEntity;
import org.apache.commons.lang3.builder.ToStringBuilder;
import org.apache.commons.lang3.builder.ToStringStyle;/*** 商品管理对象 tb_sku** @author itheima* @date 2024-07-15*/
@ExcelIgnoreUnannotated// 注解表示在导出Excel时，忽略没有被任何注解标记的字段
@ColumnWidth(16)// 注解用于设置列的宽度
@HeadRowHeight(14)// 注解用于设置表头行的高度
@HeadFontStyle(fontHeightInPoints = 11)// 注解用于设置表头的字体样式
public class Sku extends BaseEntity
{private static final long serialVersionUID = 1L;/** 主键 */private Long skuId;/** 商品名称 */@Excel(name = "商品名称")@ExcelProperty("商品名称")private String skuName;/** 商品图片 */@Excel(name = "商品图片")@ExcelProperty("商品图片")private String skuImage;/** 品牌 */@Excel(name = "品牌")@ExcelProperty("品牌")private String brandName;/** 规格(净含量) */@Excel(name = "规格(净含量)")@ExcelProperty("规格(净含量)")private String unit;/** 商品价格 */@Excel(name = "商品价格")@ExcelProperty("商品价格")private Long price;/** 商品类型Id */@Excel(name = "商品类型Id")@ExcelProperty("商品类型Id")private Long classId;/** 是否打折促销 */private Integer isDiscount;// 其他略...
}

2.4SkuController.java改为importEasyExcel

/*** 导入商品管理列表*/
@PreAuthorize("@ss.hasPermi('manage:sku:add')")
@Log(title = "商品管理", businessType = BusinessType.IMPORT)
@PostMapping("/import")
public AjaxResult excelImport(MultipartFile file) throws Exception {ExcelUtil<Sku> util = new ExcelUtil<Sku>(Sku.class);List<Sku> skuList = util.importEasyExcel(file.getInputStream());return toAjax(skuService.insertSkus(skuList));
}/*** 导出商品管理列表*/
@PreAuthorize("@ss.hasPermi('manage:sku:export')")
@Log(title = "商品管理", businessType = BusinessType.EXPORT)
@PostMapping("/export")
public void export(HttpServletResponse response, Sku sku) {List<Sku> list = skuService.selectSkuList(sku);ExcelUtil<Sku> util = new ExcelUtil<Sku>(Sku.class);util.exportEasyExcel(response, list, "商品管理数据");
}