ExcelUtil工具类
若依项目中的工具类，可以读取FTP输入流中的Excel表格
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.util.ArrayList; import java.util.Arrays; import java.util.Date; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.UUID; import org.apache.poi.hssf.usermodel.HSSFDateUtil; 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.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.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.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.CellRangeAddressList; import org.apache.poi.xssf.streaming.SXSSFWorkbook; import org.apache.poi.xssf.usermodel.XSSFDataValidation; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import tv.huan.common.annotation.Excel; import tv.huan.common.annotation.Excel.ColumnType; import tv.huan.common.annotation.Excel.Type; import tv.huan.common.annotation.Excels; import tv.huan.common.config.Global; import tv.huan.common.core.domain.AjaxResult; import tv.huan.common.core.text.Convert; import tv.huan.common.exception.BusinessException; import tv.huan.common.utils.DateUtils; import tv.huan.common.utils.StringUtils; import tv.huan.common.utils.reflect.ReflectUtils; /** * Excel相关处理 **/ public class ExcelUtil<T> { private static final Logger log = LoggerFactory.getLogger(ExcelUtil.class); /** * 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; /** * 实体对象 */ public Class<T> clazz; public ExcelUtil(Class<T> clazz) { this.clazz = clazz; } public void init(List<T> list, String sheetName, Type type) { if (list == null) { list = new ArrayList<T>(); } this.list = list; this.sheetName = sheetName; this.type = type; createExcelField(); createWorkbook(); } /** * 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(StringUtils.EMPTY, is); } /** * 对excel表单指定表格索引名转换成list * * @param sheetName 表格索引名 * @param is 输入流 * @return 转换后集合 */ public List<T> importExcel(String sheetName, InputStream is) throws Exception { this.type = Type.IMPORT; this.wb = WorkbookFactory.create(is); List<T> list = new ArrayList<T>(); Sheet sheet = null; if (StringUtils.isNotEmpty(sheetName)) { // 如果指定sheet名,则取指定sheet中的内容. sheet = wb.getSheet(sheetName); } else { // 如果传入的sheet名不存在则默认指向第1个sheet. sheet = wb.getSheetAt(0); } if (sheet == null) { throw new IOException("文件sheet不存在"); } int rows = sheet.getPhysicalNumberOfRows(); 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(0); for (int i = 0; i < heard.getPhysicalNumberOfCells(); i++) { Cell cell = heard.getCell(i); if (StringUtils.isNotNull(cell != null)) { 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. Field[] allFields = clazz.getDeclaredFields(); // 定义一个map用于存放列的序号和field. Map<Integer, Field> fieldsMap = new HashMap<Integer, Field>(); for (int col = 0; col < allFields.length; col++) { Field field = allFields[col]; Excel attr = field.getAnnotation(Excel.class); if (field.isAnnotationPresent(Excels.class)) { Excels attrs = field.getAnnotation(Excels.class); attr = attrs.value()[0]; } if (attr != null && (attr.type() == Type.ALL || attr.type() == type)) { // 设置类的私有字段属性可访问. field.setAccessible(true); Integer column = cellMap.get(attr.name()); fieldsMap.put(column, field); } } for (int i = 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); T entity = null; for (Map.Entry<Integer, Field> 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 = fieldsMap.get(entry.getKey()); // 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 { val = Convert.toStr(val); } } else if ((Integer.TYPE == fieldType) || (Integer.class == fieldType)) { val = Convert.toInt(val); } else if ((Long.TYPE == fieldType) || (Long.class == fieldType)) { 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); } } if (StringUtils.isNotNull(fieldType)) { Excel attr = field.getAnnotation(Excel.class); if (field.isAnnotationPresent(Excels.class)) { Excels attrs = field.getAnnotation(Excels.class); attr = attrs.value()[0]; } String propertyName = field.getName(); if (StringUtils.isNotEmpty(attr.targetAttr())) { propertyName = field.getName() + "." + attr.targetAttr(); } else if (StringUtils.isNotEmpty(attr.readConverterExp())) { val = reverseByExp(String.valueOf(val), attr.readConverterExp()); } 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) { this.init(list, sheetName, Type.EXPORT); 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 AjaxResult importTemplateExcel(String sheetName) { this.init(null, sheetName, Type.IMPORT); return exportExcel(); } /** * 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 { // 取出一共有多少个sheet. double sheetNo = Math.ceil(list.size() / sheetSize); for (int index = 0; index <= sheetNo; index++) { createSheet(sheetNo, index); // 产生一行 Row row = sheet.createRow(0); 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); } } 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 BusinessException("导出Excel失败，请联系网站管理员！"); } finally { if (wb != null) { try { wb.close(); } catch (IOException e1) { e1.printStackTrace(); } } if (out != null) { try { out.close(); } catch (IOException e1) { e1.printStackTrace(); } } } } /** * 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()); for (int i = startNo; i < endNo; i++) { row = sheet.createRow(i + 1 - startNo); // 得到导出对象. T vo = (T) list.get(i); 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++); } } } /** * 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); 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); 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()) { cell.setCellType(CellType.NUMERIC); cell.setCellValue(StringUtils.isNull(value) ? attr.defaultValue() : value + attr.suffix()); } else if (ColumnType.NUMERIC == attr.cellType()) { cell.setCellType(CellType.NUMERIC); cell.setCellValue(Integer.parseInt(value + "")); } } /** * 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)); row.setHeight((short) (attr.height() * 20)); } // 如果设置了提示信息则鼠标放上去提示. if (StringUtils.isNotEmpty(attr.prompt())) { // 这里默认设了2-101列提示. setXSSFPrompt(sheet, "", attr.prompt(), 1, 100, column, column); } // 如果设置了combo属性则本列只能选择不能输入 if (attr.combo().length > 0) { // 这里默认设了2-101列只能选择不能输入. setXSSFValidation(sheet, attr.combo(), 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((short) (attr.height() * 20)); // 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cell cell = row.createCell(column); cell.setCellStyle(styles.get("data")); // 用于读取对象中的属性 Object value = getTargetValue(vo, field, attr); String dateFormat = attr.dateFormat(); String readConverterExp = attr.readConverterExp(); 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(String.valueOf(value), readConverterExp)); } else { // 设置列类型 setCellVo(value, attr, cell); } } } catch (Exception e) { log.error("导出Excel失败{}", e); } return cell; } /** * 设置 POI XSSFSheet 单元格提示 * * @param sheet 表单 * @param promptTitle 提示标题 * @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 setXSSFPrompt(Sheet sheet, String promptTitle, String promptContent, int firstRow, int endRow, int firstCol, int endCol) { DataValidationHelper helper = sheet.getDataValidationHelper(); DataValidationConstraint constraint = helper.createCustomConstraint("DD1"); CellRangeAddressList regions = new CellRangeAddressList(firstRow, endRow, firstCol, endCol); DataValidation dataValidation = helper.createValidation(constraint, regions); dataValidation.createPromptBox(promptTitle, promptContent); dataValidation.setShowPromptBox(true); sheet.addValidationData(dataValidation); } /** * 设置某些列的值只能输入预制的数据,显示下拉框. * * @param sheet 要设置的sheet. * @param textlist 下拉框显示的内容 * @param firstRow 开始行 * @param endRow 结束行 * @param firstCol 开始列 * @param endCol 结束列 * @return 设置好的sheet. */ public void setXSSFValidation(Sheet sheet, String[] textlist, int firstRow, int endRow, int firstCol, int endCol) { DataValidationHelper helper = sheet.getDataValidationHelper(); // 加载下拉列表内容 DataValidationConstraint constraint = helper.createExplicitListConstraint(textlist); // 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); // 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 * @return 解析后值 * @throws Exception */ public static String convertByExp(String propertyValue, String converterExp) throws Exception { try { String[] convertSource = converterExp.split(","); for (String item : convertSource) { String[] itemArray = item.split("="); if (itemArray[0].equals(propertyValue)) { return itemArray[1]; } } } catch (Exception e) { throw e; } return propertyValue; } /** * 反向解析值 男=0,女=1,未知=2 * * @param propertyValue 参数值 * @param converterExp 翻译注解 * @return 解析后值 * @throws Exception */ public static String reverseByExp(String propertyValue, String converterExp) throws Exception { try { String[] convertSource = converterExp.split(","); for (String item : convertSource) { String[] itemArray = item.split("="); if (itemArray[1].equals(propertyValue)) { return itemArray[0]; } } } catch (Exception e) { throw e; } return propertyValue; } /** * 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 = Global.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.indexOf(".") > -1) { 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.isNotEmpty(name)) { Class<?> clazz = o.getClass(); String methodName = "get" + name.substring(0, 1).toUpperCase() + name.substring(1); Method method = clazz.getMethod(methodName); o = method.invoke(o); } return o; } /** * 得到所有定义字段 */ private void createExcelField() { this.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)) { putToField(field, field.getAnnotation(Excel.class)); } // 多注解 if (field.isAnnotationPresent(Excels.class)) { Excels attrs = field.getAnnotation(Excels.class); Excel[] excels = attrs.value(); for (Excel excel : excels) { putToField(field, excel); } } } } /** * 放到字段集合中 */ private void putToField(Field field, Excel attr) { if (attr != null && (attr.type() == Type.ALL || attr.type() == type)) { this.fields.add(new Object[]{field, attr}); } } /** * 创建一个工作簿 */ public void createWorkbook() { this.wb = new SXSSFWorkbook(500); } /** * 创建工作表 * * @param sheetNo sheet数量 * @param index 序号 */ public void createSheet(double sheetNo, int index) { this.sheet = wb.createSheet(); this.styles = createStyles(wb); // 设置工作表的名称. if (sheetNo == 0) { wb.setSheetName(index, sheetName); } else { 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 (cell != null) { if (cell.getCellTypeEnum() == CellType.NUMERIC || cell.getCellTypeEnum() == CellType.FORMULA) { val = cell.getNumericCellValue(); if (HSSFDateUtil.isCellDateFormatted(cell)) { val = DateUtil.getJavaDate((Double) val); // POI Excel 日期格式转换 } else { if ((Double) val % 1 > 0) { val = new DecimalFormat("0.00").format(val); } else { val = new DecimalFormat("0").format(val); } } } else if (cell.getCellTypeEnum() == CellType.STRING) { val = cell.getStringCellValue(); } else if (cell.getCellTypeEnum() == CellType.BOOLEAN) { val = cell.getBooleanCellValue(); } else if (cell.getCellTypeEnum() == CellType.ERROR) { val = cell.getErrorCellValue(); } } } catch (Exception e) { return val; } return val; } }
在他的项目中的定时任务有反射机制，所以在方法外定义的变量或者属性是查不到的，会有空指针异常，又找了一个读流解析表格的。
public static List<List<String>> readExcel(InputStream is) throws Exception { // HSSFWorkbook 标识整个excel HSSFWorkbook hssfWorkbook = new HSSFWorkbook(is); List<List<String>> result = new ArrayList<List<String>>(); int size = hssfWorkbook.getNumberOfSheets(); // 循环每一页，并处理当前循环页 for (int numSheet = 0; numSheet < size; numSheet++) { // HSSFSheet 标识某一页 HSSFSheet hssfSheet = hssfWorkbook.getSheetAt(numSheet); if (hssfSheet == null) { continue; } // 处理当前页，循环读取每一行 for (int rowNum = 1; rowNum <= hssfSheet.getLastRowNum(); rowNum++) { // HSSFRow表示行 HSSFRow hssfRow = hssfSheet.getRow(rowNum); int minColIx = hssfRow.getFirstCellNum(); int maxColIx = hssfRow.getLastCellNum(); List<String> rowList = new ArrayList<String>(); // 遍历改行，获取处理每个cell元素 for (int colIx = minColIx; colIx < maxColIx; colIx++) { // HSSFCell 表示单元格 HSSFCell cell = hssfRow.getCell(colIx); boolean isMerge = isMergedRegion(hssfSheet, rowNum, colIx); //判断是否具有合并单元格 if(isMerge) { rowList.add(getMergedRegionValue(hssfSheet, rowNum, colIx)); }else { //returnStr = cell.getRichStringCellValue().getString(); rowList.add(getStringVal(cell)); } if (cell == null) { continue; } } result.add(rowList); } } return result; } /** * 改造poi默认的toString（） * @param @param cell * @param @return 设定文件 * @return String 返回类型 * @throws * @Title: getStringVal * @Description: * 1.对于不熟悉的类型，或者为空则返回""控制串 * 2.如果是数字，则修改单元格类型为String，然后返回String，保证数字不被格式化 */ public static String getStringVal(HSSFCell cell) { switch (cell.getCellType()) { case Cell.CELL_TYPE_BOOLEAN: return cell.getBooleanCellValue() ? "TRUE" : "FALSE"; case Cell.CELL_TYPE_FORMULA: return cell.getCellFormula(); case Cell.CELL_TYPE_NUMERIC: //cell.setCellType(Cell.CELL_TYPE_STRING); //return cell.getStringCellValue(); if (HSSFDateUtil.isCellDateFormatted(cell)) { Date date = cell.getDateCellValue(); return DateFormatUtils.format(date, "yyyy-MM-dd HH:mm:ss"); } else { DecimalFormat df = new DecimalFormat("0"); return(df.format(cell.getNumericCellValue())); } case Cell.CELL_TYPE_STRING: return cell.getStringCellValue(); default: return ""; } } /** * 判断指定的单元格是否是合并单元格 * @param hssfSheet * @param row 行下标 * @param column 列下标 * @return */ private static boolean isMergedRegion(HSSFSheet hssfSheet, int row , int column) { int sheetMergeCount = hssfSheet.getNumMergedRegions(); for (int i = 0; i < sheetMergeCount; i++) { CellRangeAddress range = hssfSheet.getMergedRegion(i); int firstColumn = range.getFirstColumn(); int lastColumn = range.getLastColumn(); int firstRow = range.getFirstRow(); int lastRow = range.getLastRow(); if(row >= firstRow && row <= lastRow){ if(column >= firstColumn && column <= lastColumn){ return true; } } } return false; } /** * 获取合并单元格的值 * @param hssfSheet * @param row * @param column * @return */ public static String getMergedRegionValue(HSSFSheet hssfSheet ,int row , int column){ int sheetMergeCount = hssfSheet.getNumMergedRegions(); for(int i = 0 ; i < sheetMergeCount ; i++){ CellRangeAddress ca = hssfSheet.getMergedRegion(i); int firstColumn = ca.getFirstColumn(); int lastColumn = ca.getLastColumn(); int firstRow = ca.getFirstRow(); int lastRow = ca.getLastRow(); if(row >= firstRow && row <= lastRow){ if(column >= firstColumn && column <= lastColumn){ HSSFRow hssfRow = hssfSheet.getRow(firstRow); HSSFCell fCell = hssfRow.getCell(firstColumn); return getStringVal(fCell) ; } } } return null; }
原文：https://blog.csdn.net/weixin_42558461/article/details/82219121
