java excel合并内容相同的单元格

╰+攻爆jí腚メ 2024-03-25 22:48 31阅读 0赞

## 1、背景 ##

最近在做导出的过程中，导出的excel，列值的内容有很多相同的部分，针对这部分需要进行单元格的合并。那么在java中是如何实现的呢？

## 2、实现 ##

/**
     * excel 工具类
     *
     * @author huan.fu
     * @date 2023/3/21 - 20:25
     */
    public class ExcelUtil {
        
    
        /**
         * 合并指定Excel sheet页、指定列中连续相同内容的单元格
         *
         * @param sheet    Excel sheet
         * @param startRow 从第几行开始， startRow的值从1开始
         * @param column   指定列
         */
        public static void mergeSameCellContentColumn(Sheet sheet, int startRow, int column) {
        
            int totalRows = sheet.getLastRowNum();
            int firstRow = 0;
            int lastRow = 0;
            // 上一次比较是否相同
            boolean isPrevCompareSame = false;
            String prevMergeAddress = null;
            String currentMergeAddress;
            // 从第几开始判断是否相同
            if (totalRows >= startRow) {
        
                for (int i = startRow; i <= totalRows; i++) {
        
                    String lastRowCellContent = sheet.getRow(i - 1).getCell(column).getStringCellValue();
                    String curRowCellContent = sheet.getRow(i).getCell(column).getStringCellValue();
                    if (curRowCellContent.equals(lastRowCellContent)) {
        
                        if (!isPrevCompareSame) {
        
                            firstRow = i - 1;
                        }
                        lastRow = i;
                        isPrevCompareSame = true;
                    } else {
        
                        isPrevCompareSame = false;
                        currentMergeAddress = firstRow + lastRow + column + column + "";
                        if (lastRow > firstRow && !Objects.equals(currentMergeAddress, prevMergeAddress)) {
        
                            sheet.addMergedRegion(new CellRangeAddress(firstRow, lastRow, column, column));
                            prevMergeAddress = currentMergeAddress;
                        }
                    }
                    // 最后一行时判断是否有需要合并的行
                    if ((i == totalRows) && (lastRow > firstRow)) {
        
                        currentMergeAddress = firstRow + lastRow + column + column + "";
                        if (!Objects.equals(currentMergeAddress, prevMergeAddress)) {
        
                            sheet.addMergedRegion(new CellRangeAddress(firstRow, lastRow, column, column));
                        }
                    }
                }
            }
        }
    }

## 3、实现效果 ##

![实现效果][4481fb22063f4fdba78ca3d47a9a7d94.png]

[4481fb22063f4fdba78ca3d47a9a7d94.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/25/e8167286579149fb98b92e978ac84b8e.png