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update 优化 excel导出合并 在初始化类时进行数据的处理

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疯狂的狮子li 2023-05-23 13:45:11 +08:00
parent f687bde93b
commit b8e389bb7e
1 changed files with 65 additions and 66 deletions
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131
ruoyi-common/ruoyi-common-excel/src/main/java/org/dromara/common/excel/core/CellMergeStrategy.java
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@ -28,95 +28,94 @@ import java.util.Map;
@Slf4j
public class CellMergeStrategy extends AbstractMergeStrategy {
private final List<?> list;
private final boolean hasTitle;
private final List<CellRangeAddress> cellList;
private final boolean hasTitle;
private int rowIndex;
public CellMergeStrategy(List<?> list, boolean hasTitle) {
this.list = list;
this.hasTitle = hasTitle;
// 行合并开始下标
this.rowIndex = hasTitle ? 1 : 0;
this.cellList = handle(list, hasTitle);
}
@Override
protected void merge(Sheet sheet, Cell cell, Head head, Integer relativeRowIndex) {
List<CellRangeAddress> cellList = handle(list, hasTitle);
// judge the list is not null
if (CollUtil.isNotEmpty(cellList)) {
// the judge is necessary
if (cell.getRowIndex() == rowIndex && cell.getColumnIndex() == 0) {
for (CellRangeAddress item : cellList) {
sheet.addMergedRegion(item);
}
}
}
}
protected void merge(Sheet sheet, Cell cell, Head head, Integer relativeRowIndex) {
// judge the list is not null
if (CollUtil.isNotEmpty(cellList)) {
// the judge is necessary
if (cell.getRowIndex() == rowIndex && cell.getColumnIndex() == 0) {
for (CellRangeAddress item : cellList) {
sheet.addMergedRegion(item);
}
}
}
}
@SneakyThrows
private List<CellRangeAddress> handle(List<?> list, boolean hasTitle) {
List<CellRangeAddress> cellList = new ArrayList<>();
if (CollUtil.isEmpty(list)) {
return cellList;
}
@SneakyThrows
private List<CellRangeAddress> handle(List<?> list, boolean hasTitle) {
List<CellRangeAddress> cellList = new ArrayList<>();
if (CollUtil.isEmpty(list)) {
return cellList;
}
Field[] fields = ReflectUtils.getFields(list.get(0).getClass(), field -> !"serialVersionUID".equals(field.getName()));
// 有注解的字段
List<Field> mergeFields = new ArrayList<>();
List<Integer> mergeFieldsIndex = new ArrayList<>();
for (int i = 0; i < fields.length; i++) {
Field field = fields[i];
if (field.isAnnotationPresent(CellMerge.class)) {
CellMerge cm = field.getAnnotation(CellMerge.class);
// 有注解的字段
List<Field> mergeFields = new ArrayList<>();
List<Integer> mergeFieldsIndex = new ArrayList<>();
for (int i = 0; i < fields.length; i++) {
Field field = fields[i];
if (field.isAnnotationPresent(CellMerge.class)) {
CellMerge cm = field.getAnnotation(CellMerge.class);
mergeFields.add(field);
mergeFieldsIndex.add(cm.index() == -1 ? i : cm.index());
if (hasTitle) {
ExcelProperty property = field.getAnnotation(ExcelProperty.class);
rowIndex = Math.max(rowIndex, property.value().length);
}
}
}
}
}
Map<Field, RepeatCell> map = new HashMap<>();
// 生成两两合并单元格
for (int i = 0; i < list.size(); i++) {
for (int j = 0; j < mergeFields.size(); j++) {
Field field = mergeFields.get(j);
Map<Field, RepeatCell> map = new HashMap<>();
// 生成两两合并单元格
for (int i = 0; i < list.size(); i++) {
for (int j = 0; j < mergeFields.size(); j++) {
Field field = mergeFields.get(j);
Object val = ReflectUtils.invokeGetter(list.get(i), field.getName());
int colNum = mergeFieldsIndex.get(j);
if (!map.containsKey(field)) {
map.put(field, new RepeatCell(val, i));
} else {
RepeatCell repeatCell = map.get(field);
Object cellValue = repeatCell.getValue();
if (cellValue == null || "".equals(cellValue)) {
// 空值跳过不合并
continue;
}
if (!cellValue.equals(val)) {
if (i - repeatCell.getCurrent() > 1) {
cellList.add(new CellRangeAddress(repeatCell.getCurrent() + rowIndex, i + rowIndex - 1, colNum, colNum));
}
map.put(field, new RepeatCell(val, i));
} else if (i == list.size() - 1) {
if (i > repeatCell.getCurrent()) {
cellList.add(new CellRangeAddress(repeatCell.getCurrent() + rowIndex, i + rowIndex, colNum, colNum));
}
}
}
}
}
return cellList;
}
int colNum = mergeFieldsIndex.get(j);
if (!map.containsKey(field)) {
map.put(field, new RepeatCell(val, i));
} else {
RepeatCell repeatCell = map.get(field);
Object cellValue = repeatCell.getValue();
if (cellValue == null || "".equals(cellValue)) {
// 空值跳过不合并
continue;
}
if (!cellValue.equals(val)) {
if (i - repeatCell.getCurrent() > 1) {
cellList.add(new CellRangeAddress(repeatCell.getCurrent() + rowIndex, i + rowIndex - 1, colNum, colNum));
}
map.put(field, new RepeatCell(val, i));
} else if (i == list.size() - 1) {
if (i > repeatCell.getCurrent()) {
cellList.add(new CellRangeAddress(repeatCell.getCurrent() + rowIndex, i + rowIndex, colNum, colNum));
}
}
}
}
}
return cellList;
}
@Data
@AllArgsConstructor
static class RepeatCell {
@Data
@AllArgsConstructor
static class RepeatCell {
private Object value;
private Object value;
private int current;
private int current;
}
}
}