content: package com.alibaba.excel.write.handler.impl;
  
  import java.lang.reflect.Field;
  import java.util.Map;
  
  import com.alibaba.excel.util.FieldUtils;
  import com.alibaba.excel.write.handler.WorkbookWriteHandler;
  import com.alibaba.excel.write.metadata.holder.WriteSheetHolder;
  import com.alibaba.excel.write.metadata.holder.WriteWorkbookHolder;
  
  import lombok.extern.slf4j.Slf4j;
  import org.apache.commons.collections4.MapUtils;
  import org.apache.poi.ss.util.CellReference;
  import org.apache.poi.xssf.streaming.SXSSFSheet;
  import org.apache.poi.xssf.streaming.SXSSFWorkbook;
  import org.apache.poi.xssf.usermodel.XSSFSheet;
  import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTWorksheet;
  
  /**
   * Handle the problem of unable to write dimension.
   *
   * https://github.com/alibaba/easyexcel/issues/1282
   *
   * @author Jiaju Zhuang
   */
  @Slf4j
  public class DimensionWorkbookWriteHandler implements WorkbookWriteHandler {
  
      private static final String XSSF_SHEET_MEMBER_VARIABLE_NAME = "_sh";
      private static final Field XSSF_SHEET_FIELD = FieldUtils.getField(SXSSFSheet.class, XSSF_SHEET_MEMBER_VARIABLE_NAME,
          true);
  
      @Override
      public void afterWorkbookDispose(WriteWorkbookHolder writeWorkbookHolder) {
          if (writeWorkbookHolder == null || writeWorkbookHolder.getWorkbook() == null) {
              return;
          }
          if (!(writeWorkbookHolder.getWorkbook() instanceof SXSSFWorkbook)) {
              return;
          }
  
          Map<Integer, WriteSheetHolder> writeSheetHolderMap = writeWorkbookHolder.getHasBeenInitializedSheetIndexMap();
          if (MapUtils.isEmpty(writeSheetHolderMap)) {
              return;
          }
          for (WriteSheetHolder writeSheetHolder : writeSheetHolderMap.values()) {
              if (writeSheetHolder.getSheet() == null || !(writeSheetHolder.getSheet() instanceof SXSSFSheet)) {
                  continue;
              }
              SXSSFSheet sxssfSheet = ((SXSSFSheet)writeSheetHolder.getSheet());
              XSSFSheet xssfSheet;
              try {
                  xssfSheet = (XSSFSheet)XSSF_SHEET_FIELD.get(sxssfSheet);
              } catch (IllegalAccessException e) {
                  log.debug("Can not found _sh.", e);
                  continue;
              }
              if (xssfSheet == null) {
                  continue;
              }
              CTWorksheet ctWorksheet = xssfSheet.getCTWorksheet();
              if (ctWorksheet == null) {
                  continue;
              }
              int headSize = 0;
              if (MapUtils.isNotEmpty(writeSheetHolder.getExcelWriteHeadProperty().getHeadMap())) {
                  headSize = writeSheetHolder.getExcelWriteHeadProperty().getHeadMap().size();
                  if (headSize > 0) {
                      headSize--;
                  }
              }
              Integer lastRowIndex = writeSheetHolder.getLastRowIndex();
              if (lastRowIndex == null) {
                  lastRowIndex = 0;
              }
  
              ctWorksheet.getDimension().setRef(
                  "A1:" + CellReference.convertNumToColString(headSize) + (lastRowIndex + 1));
          }
      }
  }
  