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package com.hfkj.common.utils; |
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import com.alibaba.excel.metadata.CellData; |
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import com.alibaba.excel.metadata.Head; |
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import com.alibaba.excel.write.handler.CellWriteHandler; |
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import com.alibaba.excel.write.metadata.holder.WriteSheetHolder; |
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import com.alibaba.excel.write.metadata.holder.WriteTableHolder; |
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import org.apache.poi.ss.usermodel.Cell; |
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import org.apache.poi.ss.usermodel.CellType; |
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import org.apache.poi.ss.usermodel.Row; |
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import org.apache.poi.ss.usermodel.Sheet; |
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import org.apache.poi.ss.util.CellRangeAddress; |
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import java.util.List; |
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public class ExcelFillCellMergeStrategyUtils implements CellWriteHandler { |
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/** |
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* 需要合并列的下标，从0开始 |
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*/ |
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private int[] mergeColumnIndex; |
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/** |
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* 从第几行开始合并，表头下标为0 |
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*/ |
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private int mergeRowIndex; |
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public ExcelFillCellMergeStrategyUtils(int mergeRowIndex, int[] mergeColumnIndex) { |
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this.mergeRowIndex = mergeRowIndex; |
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this.mergeColumnIndex = mergeColumnIndex; |
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} |
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@Override |
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public void beforeCellCreate(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder, Row row, Head head, Integer integer, Integer integer1, Boolean aBoolean) { |
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} |
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@Override |
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public void afterCellCreate(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder, Cell cell, Head head, Integer integer, Boolean aBoolean) { |
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} |
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@Override |
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public void afterCellDataConverted(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder, CellData cellData, Cell cell, Head head, Integer integer, Boolean aBoolean) { |
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} |
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@Override |
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public void afterCellDispose(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder, List<CellData> list, Cell cell, Head head, Integer integer, Boolean aBoolean) { |
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//当前行
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int curRowIndex = cell.getRowIndex(); |
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//当前列
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int curColIndex = cell.getColumnIndex(); |
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if (curColIndex == 0) { |
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Row preRow = cell.getSheet().getRow(curRowIndex - 1); |
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if (preRow == null) { |
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// 当获取不到上一行数据时，使用缓存sheet中数据
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preRow = writeSheetHolder.getCachedSheet().getRow(curRowIndex - 1); |
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} |
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if (preRow != null) { |
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if (cell.getStringCellValue().equals(preRow.getCell(0).getStringCellValue())) { |
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for (int i = 0; i < mergeColumnIndex.length; i++) { |
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if (curColIndex == mergeColumnIndex[i]) { |
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mergeWithPrevRow(writeSheetHolder, cell, i, i); |
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break; |
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} |
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} |
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} |
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} |
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} |
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// preRow.getCell(curColIndex);
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/* if (curRowIndex > mergeRowIndex) { |
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for (int i = 0; i < mergeColumnIndex.length; i++) { |
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if (curColIndex == mergeColumnIndex[i]) { |
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mergeWithPrevRow(writeSheetHolder, cell, curRowIndex, curColIndex); |
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break; |
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} |
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} |
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}*/ |
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} |
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private void mergeWithPrevRow(WriteSheetHolder writeSheetHolder, Cell cell, int curRowIndex, int curColIndex) { |
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Sheet sheet = writeSheetHolder.getSheet(); |
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List<CellRangeAddress> mergeRegions = sheet.getMergedRegions(); |
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boolean isMerged = false; |
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for (int i = 0; i < mergeRegions.size() && !isMerged; i++) { |
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CellRangeAddress cellRangeAddr = mergeRegions.get(i); |
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// 若上一个单元格已经被合并，则先移出原有的合并单元，再重新添加合并单元
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if (cellRangeAddr.isInRange(curRowIndex - 1, curColIndex)) { |
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sheet.removeMergedRegion(i); |
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cellRangeAddr.setLastRow(curRowIndex); |
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sheet.addMergedRegion(cellRangeAddr); |
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isMerged = true; |
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} |
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} |
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// 若上一个单元格未被合并，则新增合并单元
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if (!isMerged) { |
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CellRangeAddress cellRangeAddress = new CellRangeAddress(curRowIndex - 1, curRowIndex, curColIndex, |
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curColIndex); |
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sheet.addMergedRegion(cellRangeAddress); |
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} |
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} |
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} |
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@ -0,0 +1,186 @@ |
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package com.hfkj.common.utils; |
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import com.alibaba.excel.metadata.Head; |
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import com.alibaba.excel.write.merge.AbstractMergeStrategy; |
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import org.apache.commons.lang3.StringUtils; |
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import org.apache.poi.ss.usermodel.Cell; |
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import org.apache.poi.ss.usermodel.Sheet; |
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import org.apache.poi.ss.util.CellRangeAddress; |
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import java.util.*; |
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/** |
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* @className: MergeCellStrategyHandler |
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* @author: HuRui |
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* @date: 2024/8/2 |
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**/ |
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public class MergeCellStrategyHandler extends AbstractMergeStrategy { |
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/** |
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* 相同列合并 |
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*/ |
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private boolean alikeColumn; |
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/** |
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* 相同行合并 |
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*/ |
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private boolean alikeRow; |
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/** 开始进行合并的行index */ |
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private int rowIndex; |
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/** 跨行合并的列index */ |
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private Set<Integer> columns; |
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private int currentRowIndex = 0; |
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public MergeCellStrategyHandler(boolean alikeColumn, boolean alikeRow, int rowIndex, Set<Integer> columns){ |
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this.alikeColumn = alikeColumn; |
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this.alikeRow = alikeRow; |
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this.rowIndex = rowIndex; |
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this.columns = columns; |
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} |
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/** |
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* 指定是否进行跨列合并单元格 |
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* @param alikeColumn |
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* @param rowIndex |
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*/ |
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public MergeCellStrategyHandler(boolean alikeColumn, int rowIndex){ |
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this(alikeColumn, false, rowIndex, new HashSet<>()); |
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} |
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/** |
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* 指定是否进行跨行合并单元格 |
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* @param alikeRow |
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* @param rowIndex |
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* @param columns |
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*/ |
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public MergeCellStrategyHandler(boolean alikeRow, int rowIndex, Set<Integer> columns){ |
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this(false, alikeRow, rowIndex, columns); |
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} |
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@Override |
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protected void merge(Sheet sheet, Cell cell, Head head, Integer integer) { |
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int rowId = cell.getRowIndex(); |
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currentRowIndex = rowId == currentRowIndex ? currentRowIndex : rowId; |
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if (rowIndex > rowId) { |
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return; |
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} |
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int columnId = cell.getColumnIndex(); |
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// 列合并
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if (alikeColumn && columnId > 0) { |
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String currentCellVal = this.getCellVal(cell); |
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Cell preCell = cell.getRow().getCell(columnId - 1); |
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String preCellVal = this.getCellVal(preCell); |
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if (null != currentCellVal && null != preCellVal && StringUtils.isNotBlank(preCellVal) && StringUtils.isNotBlank(currentCellVal)) { |
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// 当前单元格内容与上一个单元格内容相等,进行合并处理
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if (preCellVal.equals(currentCellVal)) { |
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CellRangeAddress rangeAddress = new CellRangeAddress(currentRowIndex, currentRowIndex, columnId - 1, columnId); |
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rangeAddress = this.findExistAddress(sheet, rangeAddress, currentCellVal); |
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if (null != rangeAddress) { |
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sheet.addMergedRegion(rangeAddress); |
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} |
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} |
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} |
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} |
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// 行合并
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if (alikeRow && rowIndex < rowId && columns.contains(columnId)) { |
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String currentCellVal = this.getCellVal(cell); |
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Cell preCell = sheet.getRow(rowId - 1).getCell(columnId); |
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String preCellVal = this.getCellVal(preCell); |
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if (null != currentCellVal && null != preCellVal && !preCellVal.isBlank() && !currentCellVal.isBlank()) { |
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// 当前单元格内容与上一行单元格内容相等,进行合并处理
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if (preCellVal.equals(currentCellVal)) { |
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//sheet.validateMergedRegions();
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CellRangeAddress rangeAddress = new CellRangeAddress(currentRowIndex - 1, currentRowIndex, columnId, columnId); |
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rangeAddress = this.findExistAddress(sheet, rangeAddress, currentCellVal); |
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if (null != rangeAddress) { |
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sheet.addMergedRegion(rangeAddress); |
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} |
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} |
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} |
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} |
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} |
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/** |
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* 合并单元格地址范围,发现存在相同的地址则进行扩容合并 |
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* |
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* @param isColumn true:跨列合并 false:跨行合并 |
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* @param sheet |
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* @param rangeAddress : |
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* @param currentVal 当前单元格中的值 |
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* @return |
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*/ |
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private CellRangeAddress findExistAddress(Sheet sheet, CellRangeAddress rangeAddress, String currentVal) { |
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List<CellRangeAddress> mergedRegions = sheet.getMergedRegions(); |
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int existIndex = 0; |
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Map<Integer, CellRangeAddress> existIdexMap = new LinkedHashMap<>(); |
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if (null != mergedRegions && !mergedRegions.isEmpty()) { |
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//验证当前合并的单元格是否存在重复(fixme 重复问题待处理!!!)
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for (CellRangeAddress mergedRegion : mergedRegions) { |
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if (mergedRegion.intersects(rangeAddress)) { |
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existIdexMap.put(existIndex, mergedRegion); |
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} |
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existIndex++; |
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} |
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} |
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if (existIdexMap.isEmpty()) { |
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return rangeAddress; |
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} |
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List<Integer> existIndexList = new ArrayList<>(existIdexMap.size()); |
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for (Map.Entry<Integer, CellRangeAddress> addressEntry : existIdexMap.entrySet()) { |
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CellRangeAddress exist = addressEntry.getValue(); |
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// 自动进行单元格合并处理
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int firstRow = rangeAddress.getFirstRow(); |
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int lastRow = rangeAddress.getLastRow(); |
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int firstColumn = rangeAddress.getFirstColumn(); |
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int lastColumn = rangeAddress.getLastColumn(); |
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int firstRow1 = exist.getFirstRow(); |
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int lastRow1 = exist.getLastRow(); |
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int firstColumn1 = exist.getFirstColumn(); |
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int lastColumn1 = exist.getLastColumn(); |
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// 跨行合并 最后一列相等, 行不相等
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if (lastRow > lastRow1 && lastColumn == lastColumn1) { |
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// 检查进行跨行合并的单元格是否已经存在跨列合并
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if (lastColumn > 0 && firstColumn1 != lastColumn1) { |
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// 获取当前单元格的前一列单元格
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String cellVal = this.getCellVal(sheet.getRow(lastRow).getCell(lastColumn - 1)); |
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if (null != cellVal && cellVal.equals(currentVal)) { |
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exist.setLastRow(lastRow); |
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} |
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} else { |
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exist.setLastRow(lastRow); |
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} |
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rangeAddress = exist; |
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existIndexList.add(addressEntry.getKey()); |
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} |
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// 跨列合并 行相等,列不相等
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if (lastColumn > lastColumn1 && firstRow == firstRow1 ) { |
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exist.setLastColumn(lastColumn); |
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rangeAddress = exist; |
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existIndexList.add(addressEntry.getKey()); |
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} |
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} |
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// 移除已经存在且冲突的合并数据
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if (existIndexList.isEmpty()) { |
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rangeAddress = null; |
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}else { |
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sheet.removeMergedRegions(existIdexMap.keySet()); |
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} |
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return rangeAddress; |
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} |
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private String getCellVal(Cell cell) { |
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String val = null; |
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try { |
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val = cell.getStringCellValue(); |
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}catch (Exception e){ |
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System.out.printf("读取单元格内容失败:行%d 列%d %n", (cell.getRowIndex() + 1), (cell.getColumnIndex() + 1)); |
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} |
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return val; |
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} |
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} |
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