ruoyi导出excel时合并单元格

ruoyi版本 3.8.2

首先第一步
增加注解

/*** 合并行* 参数1合并第一个参数为合并基准列，其他列用逗号拼接，依据基准列进行当前单元行合并 参数:如1,7, 8*/
public String mergeLine() default "";

第二步

修改其中两个方法，全部代码已粘贴，重点看addCell方法

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.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.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.RegExUtils;
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.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.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.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;
import com.ruoyi.framework.aspectj.lang.annotation.Excel;
import com.ruoyi.framework.aspectj.lang.annotation.Excel.ColumnType;
import com.ruoyi.framework.aspectj.lang.annotation.Excel.Type;
import com.ruoyi.framework.aspectj.lang.annotation.Excels;
import com.ruoyi.framework.config.RuoYiConfig;
import com.ruoyi.framework.web.domain.AjaxResult;/*** Excel相关处理** @author ruoyi*/
public class ExcelUtil<T> {private static final Logger log = LoggerFactory.getLogger(ExcelUtil.class);public static final String FORMULA_REGEX_STR = "=|-|\\+|@";public static final String[] FORMULA_STR = {"=", "-", "+", "@"};/*** 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;//是否进行合并行private boolean switchMearge = false;//合并行数  起始行，结束行private int mergeLine_start = 0;private int mergeLine_end = 0;/*** 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;public ExcelUtil(Class<T> clazz) {this.clazz = clazz;}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();}/*** 创建excel第一行标题*/public void createTitle() {if (StringUtils.isNotEmpty(title)) {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(), titleRow.getRowNum(),this.fields.size() - 1));}}/*** 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) throws Exception {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) throws Exception {return importExcel(StringUtils.EMPTY, is, titleNum);}/*** 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, PictureData> pictures;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();} else if (StringUtils.isNotEmpty(attr.readConverterExp())) {val = reverseByExp(Convert.toStr(val), attr.readConverterExp(), attr.separator());} else if (StringUtils.isNotEmpty(attr.dictType())) {val = reverseDictByExp(Convert.toStr(val), attr.dictType(), attr.separator());} else if (!attr.handler().equals(ExcelHandlerAdapter.class)) {val = dataFormatHandlerAdapter(val, attr);} else if (ColumnType.IMAGE == attr.cellType() && StringUtils.isNotEmpty(pictures)) {PictureData image = pictures.get(row.getRowNum() + "_" + entry.getKey());if (image == null) {val = "";} else {byte[] data = image.getData();val = FileUtils.writeImportBytes(data);}}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) {Excel excel = (Excel) os[1];this.createCell(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*/public void fillExcelData(int index, Row row) {int startNo = index * sheetSize;int endNo = Math.min(startNo + sheetSize, list.size());//当前行int thisLine = 0;for (int i = startNo; i < endNo; i++) {row = sheet.createRow(i + 1 - startNo);thisLine = i + 1 - startNo;// 得到导出对象.T vo = (T) list.get(i);T vo_previous = null;//得到上一个导出对象if (i != startNo) {vo_previous = (T) list.get(i - 1);}/***取下一个对象   与当前对象对比，如果相同，记住当前列，再与下一个对比，一直对比到不相同，执行合并代码* 注解加入 合并行列标识*/int column = 0;for (Object[] os : fields) {Field field = (Field) os[0];Excel excel = (Excel) os[1];// 设置实体类私有属性可访问field.setAccessible(true);this.addCell(excel, row, vo, field, column++, vo_previous, thisLine);}}}/*** 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);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.cloneStyleFrom(styles.get("data"));style.setAlignment(HorizontalAlignment.CENTER);style.setVerticalAlignment(VerticalAlignment.CENTER);style.setFillForegroundColor(IndexedColors.GREY_50_PERCENT.getIndex());style.setFillPattern(FillPatternType.SOLID_FOREGROUND);Font headerFont = wb.createFont();headerFont.setFontName("Arial");headerFont.setFontHeightInPoints((short) 10);headerFont.setBold(true);headerFont.setColor(IndexedColors.WHITE.getIndex());style.setFont(headerFont);styles.put("header", 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(annotationStyles(wb));return styles;}/*** 根据Excel注解创建表格样式** @param wb 工作薄对象* @return 自定义样式列表*/private Map<String, CellStyle> annotationStyles(Workbook wb) {Map<String, CellStyle> styles = new HashMap<String, CellStyle>();for (Object[] os : fields) {Excel excel = (Excel) os[1];String key = "data_" + excel.align() + "_" + excel.color();if (!styles.containsKey(key)) {CellStyle style = wb.createCellStyle();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());Font dataFont = wb.createFont();dataFont.setFontName("Arial");dataFont.setFontHeightInPoints((short) 10);dataFont.setColor(excel.color().index);style.setFont(dataFont);styles.put(key, style);}}return styles;}/*** 创建单元格*/public Cell createCell(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("header"));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()) {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");}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 imagePath = Convert.toStr(value);if (StringUtils.isNotEmpty(imagePath)) {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) {// 提示信息或只能选择不能输入的列内容.setPromptOrValidation(sheet, attr.combo(), attr.prompt(), 1, 100, column, column);}}/*** @param attr     excel* @param row* @param vo* @param field* @param column* @param thisLine 当前行* @return org.apache.poi.ss.usermodel.Cell* @author xkng* @creed: 合并单元行拓展* @date 2021/12/14 14:51*/public Cell addCell(Excel attr, Row row, T vo, Field field, int column, T vo_previous, int thisLine) {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);
//                int align = attr.align().value();HorizontalAlignment align1 = attr.align();int align = attr.align().ordinal();cell.setCellStyle(styles.get("data" + (align >= 1 && align <= 3 ? align : "")));//                cell = row.createCell(column);
//                cell.setCellStyle(styles.get("data_" + attr.align() + "_" + attr.color()));// 用于读取对象中的属性Object value = getTargetValue(vo, field, attr);Object value_previous = null;if (vo_previous != null) {value_previous = getTargetValue(vo_previous, field, attr);}String dateFormat = attr.dateFormat();String readConverterExp = attr.readConverterExp();String separator = attr.separator();String dictType = attr.dictType();String mergeLineStr = attr.mergeLine();String[] mergeLine = mergeLineStr.split(",");if (StringUtils.isNotEmpty(dateFormat) && StringUtils.isNotNull(value)) {cell.setCellValue(DateUtils.parseDateToStr(dateFormat, (Date) 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)) {cell.setCellValue(convertDictByExp(Convert.toStr(value), dictType, separator));} else if (value instanceof BigDecimal && -1 != attr.scale()) {cell.setCellValue((((BigDecimal) value).setScale(attr.scale(), attr.roundingMode())).toString());} else {// 设置列类型setCellVo(value, attr, cell);}addStatisticsData(column, Convert.toStr(value), attr);//合并行  单列为基准进行合并if (mergeLine.length > 0 && mergeLine[0] != null && !"".equals(mergeLine[0])){if (value.equals(value_previous)) {if (this.mergeLine_start == 0) {this.mergeLine_start = thisLine - 1;}this.mergeLine_end = thisLine;} else {if (this.mergeLine_start != 0 && this.mergeLine_end != 0) {if (this.mergeLine_start != this.mergeLine_end) {for (String ml : mergeLine) {CellRangeAddress region = new CellRangeAddress(this.mergeLine_start, this.mergeLine_end, Integer.parseInt(ml), Integer.parseInt(ml));sheet.addMergedRegion(region);}}this.mergeLine_start = 0;this.mergeLine_end = 0;}}}}} 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);}/*** 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(",");for (String item : convertSource) {String[] itemArray = item.split("=");if (StringUtils.containsAny(separator, propertyValue)) {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(",");for (String item : convertSource) {String[] itemArray = item.split("=");if (StringUtils.containsAny(separator, propertyValue)) {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) {try {Object instance = excel.handler().newInstance();Method formatMethod = excel.handler().getMethod("format", new Class[]{Object.class, String[].class});value = formatMethod.invoke(instance, value, excel.args());} 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) {filename = UUID.randomUUID().toString() + "_" + filename + ".xlsx";return filename;}/*** 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 {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()));for (Field field : tempFields) {// 单注解if (field.isAnnotationPresent(Excel.class)) {Excel attr = field.getAnnotation(Excel.class);if (attr != null && (attr.type() == Type.ALL || attr.type() == type)) {field.setAccessible(true);fields.add(new Object[]{field, attr});}}// 多注解if (field.isAnnotationPresent(Excels.class)) {Excels attrs = field.getAnnotation(Excels.class);Excel[] excels = attrs.value();for (Excel attr : excels) {if (attr != null && (attr.type() == Type.ALL || attr.type() == type)) {field.setAccessible(true);fields.add(new Object[]{field, attr});}}}}return fields;}/*** 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, PictureData> getSheetPictures03(HSSFSheet sheet, HSSFWorkbook workbook) {Map<String, PictureData> sheetIndexPicMap = new HashMap<String, PictureData>();List<HSSFPictureData> pictures = workbook.getAllPictures();if (!pictures.isEmpty()) {for (HSSFShape shape : sheet.getDrawingPatriarch().getChildren()) {HSSFClientAnchor anchor = (HSSFClientAnchor) shape.getAnchor();if (shape instanceof HSSFPicture) {HSSFPicture pic = (HSSFPicture) shape;int pictureIndex = pic.getPictureIndex() - 1;HSSFPictureData picData = pictures.get(pictureIndex);String picIndex = String.valueOf(anchor.getRow1()) + "_" + String.valueOf(anchor.getCol1());sheetIndexPicMap.put(picIndex, picData);}}return sheetIndexPicMap;} else {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, PictureData> getSheetPictures07(XSSFSheet sheet, XSSFWorkbook workbook) {Map<String, PictureData> sheetIndexPicMap = new HashMap<String, PictureData>();for (POIXMLDocumentPart dr : sheet.getRelations()) {if (dr instanceof XSSFDrawing) {XSSFDrawing drawing = (XSSFDrawing) dr;List<XSSFShape> shapes = drawing.getShapes();for (XSSFShape shape : shapes) {if (shape instanceof XSSFPicture) {XSSFPicture pic = (XSSFPicture) shape;XSSFClientAnchor anchor = pic.getPreferredSize();CTMarker ctMarker = anchor.getFrom();String picIndex = ctMarker.getRow() + "_" + ctMarker.getCol();sheetIndexPicMap.put(picIndex, 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;}
}

使用方法

以nodeName属性为合并基础 mergeLine是想要在nodeName相同的情况下合并的列。可以有多列，之间用”，“隔开即可。

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