导出的excel需要上下行相同的数据进行行合并的功能。如图显示
这里我使用的是项目框架自带的导出模板代码,是在这套模板基础之上做的修改。
java
// 我主要演示的就是mergeRows方法的操作,dataList是导出数据的集合。
workbook = ExcelTools.expData(workbook, templateSheet);
// 合并行操作
cseQuotaManageCheckService.mergeRows(workbook, dataList);
这是mergeRows方法。
java
// 合并行操作
public void mergeRows(Workbook workbook, List<?> dataList) {
if (dataList.isEmpty()) {
return;
}
Sheet sheet = workbook.getSheetAt(0);
int startRow = 2; // 数据从第 2 行开始
int deptNameCol = 1; // 从第几列开始
int benchmarkScoreCol = 2;
int finalScoreCol = 3;
int daunScoreCol = 4;
int i = 0;
while (i < dataList.size()) {
int mergeStart = i;
CseQuotaManageCheckVO current = (CseQuotaManageCheckVO) dataList.get(i);
// 查找连续相同的数据行
while (i < dataList.size() - 1) {
CseQuotaManageCheckVO next = (CseQuotaManageCheckVO) dataList.get(i + 1);
if (current.getDeptName().equals(next.getDeptName()) &&
current.getBenchmarkScore().equals(next.getBenchmarkScore()) &&
current.getFinalScore().equals(next.getFinalScore()) &&
current.getDaunScore().equals(next.getDaunScore())) {
i++;
} else {
break;
}
}
// 如果找到多个连续相同的行,则合并它们
if (mergeStart != i) {
mergeCellsIfNotOverlap(sheet, startRow + mergeStart, startRow + i, deptNameCol, deptNameCol);
mergeCellsIfNotOverlap(sheet, startRow + mergeStart, startRow + i, benchmarkScoreCol, benchmarkScoreCol);
mergeCellsIfNotOverlap(sheet, startRow + mergeStart, startRow + i, finalScoreCol, finalScoreCol);
mergeCellsIfNotOverlap(sheet, startRow + mergeStart, startRow + i, daunScoreCol, daunScoreCol);
}
// 继续下一个不相同的数据行
i++;
}
}
// 解决要合并的区域已经存在合并单元格
private void mergeCellsIfNotOverlap(Sheet sheet, int firstRow, int lastRow, int firstCol, int lastCol) {
CellRangeAddress newRegion = new CellRangeAddress(firstRow, lastRow, firstCol, lastCol);
for (int i = 0; i < sheet.getNumMergedRegions(); i++) {
CellRangeAddress existingRegion = sheet.getMergedRegion(i);
if (isOverlapping(existingRegion, newRegion)) {
return; // 跳过合并,因为它与现有合并区域重叠
}
}
sheet.addMergedRegion(newRegion);
// 居中操作
applyCellStyle(sheet, newRegion);
}
// 对合并后的行数据内容进行居中显示操作
private void applyCellStyle(Sheet sheet, CellRangeAddress region) {
Workbook workbook = sheet.getWorkbook();
CellStyle centeredStyle = workbook.createCellStyle();
centeredStyle.setAlignment(HorizontalAlignment.CENTER);
centeredStyle.setVerticalAlignment(VerticalAlignment.CENTER);
for (int row = region.getFirstRow(); row <= region.getLastRow(); row++) {
for (int col = region.getFirstColumn(); col <= region.getLastColumn(); col++) {
Row sheetRow = sheet.getRow(row);
if (sheetRow == null) {
sheetRow = sheet.createRow(row);
}
Cell cell = sheetRow.getCell(col);
if (cell == null) {
cell = sheetRow.createCell(col);
}
cell.setCellStyle(centeredStyle);
}
}
}
private boolean isOverlapping(CellRangeAddress region1, CellRangeAddress region2) {
return !(region1.getLastRow() < region2.getFirstRow() ||
region1.getFirstRow() > region2.getLastRow() ||
region1.getLastColumn() < region2.getFirstColumn() ||
region1.getFirstColumn() > region2.getLastColumn());
}