POI导入带有合并单元格的excel，demo实例，直接可以运行

直接可以运行

import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;public class TestExcel2 {public static void main(String[] args) throws Exception {String filePath = "C:\\Users\\Administrator\\Desktop\\试导入.xlsx";File file = new File(filePath);if (!file.exists()) {System.out.println(" File not exists ...");return;}List list = dealExcel(new FileInputStream(file), "试导入.xlsx");list.forEach(t->{System.out.println(t.toString());});}/*** 处理上传的文件*/public static List dealExcel(InputStream in, String fileName) throws Exception {List listResult = new ArrayList<>();Workbook work = getWorkbook(in, fileName);if (null == work) {throw new Exception("创建Excel工作薄为空！");}Sheet sheet = null;Row row = null;Cell cell = null;for (int i = 0; i < work.getNumberOfSheets(); i++) {sheet = work.getSheetAt(i);if (sheet == null) {continue;}for (int j = sheet.getFirstRowNum(); j <= sheet.getLastRowNum(); j++) {row = sheet.getRow(j);if (row == null) {continue;}List<Object> list = new ArrayList<>();for (int y = 0; y < row.getLastCellNum(); y++) {if (isMergedRegion(sheet,j,y)) {cell = getMergedRegionValue(sheet,j,y);}else{cell = row.getCell(y);}list.add(cell);}listResult.add(list);}}work.close();return listResult;}public static boolean isMergedRegion(Sheet sheet, int row, int column) {int sheetMergeCount = sheet.getNumMergedRegions();for (int i = 0; i < sheetMergeCount; i++) {CellRangeAddress range = sheet.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) {Cell cell = sheet.getRow(firstRow).getCell(firstColumn);System.out.println(cell.getStringCellValue());System.out.println("++++++++++++++++++++++++++++");return true;}}}return false;}public static Cell getMergedRegionValue(Sheet sheet, int row, int column) {int sheetMergeCount = sheet.getNumMergedRegions();for (int i = 0; i < sheetMergeCount; i++) {CellRangeAddress range = sheet.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) {Cell cell = sheet.getRow(firstRow).getCell(firstColumn);return cell;}}}return null;}/*** 判断文件格式*/public static Workbook getWorkbook(InputStream inputStream, String fileName) throws Exception {Workbook workbook = null;String fileType = fileName.substring(fileName.lastIndexOf("."));if (".xls".equals(fileType)) {workbook = new HSSFWorkbook(inputStream);} else if (".xlsx".equals(fileType)) {workbook = new XSSFWorkbook(inputStream);} else {throw new Exception("请上传excel文件！");}return workbook;}
}