| | |
| | | package org.dromara.common.excel.core; |
| | | |
| | | import cn.hutool.core.collection.CollUtil; |
| | | import com.alibaba.excel.annotation.ExcelProperty; |
| | | import com.alibaba.excel.metadata.Head; |
| | | import com.alibaba.excel.write.merge.AbstractMergeStrategy; |
| | | import org.dromara.common.excel.annotation.CellMerge; |
| | | import lombok.AllArgsConstructor; |
| | | import lombok.Data; |
| | | import lombok.SneakyThrows; |
| | | import lombok.extern.slf4j.Slf4j; |
| | | import org.apache.commons.collections4.CollectionUtils; |
| | | import org.apache.poi.ss.usermodel.Cell; |
| | | import org.apache.poi.ss.usermodel.Sheet; |
| | | import org.apache.poi.ss.util.CellRangeAddress; |
| | | import org.dromara.common.core.utils.reflect.ReflectUtils; |
| | | import org.dromara.common.excel.annotation.CellMerge; |
| | | |
| | | import java.lang.reflect.Field; |
| | | import java.lang.reflect.Method; |
| | | import java.util.ArrayList; |
| | | import java.util.HashMap; |
| | | import java.util.List; |
| | |
| | | * |
| | | * @author Lion Li |
| | | */ |
| | | @AllArgsConstructor |
| | | @Slf4j |
| | | public class CellMergeStrategy extends AbstractMergeStrategy { |
| | | |
| | | private List<?> list; |
| | | private boolean hasTitle; |
| | | private final List<?> list; |
| | | private final boolean hasTitle; |
| | | private int rowIndex; |
| | | |
| | | @Override |
| | | public CellMergeStrategy(List<?> list, boolean hasTitle) { |
| | | this.list = list; |
| | | this.hasTitle = hasTitle; |
| | | // 行合并开始下标 |
| | | this.rowIndex = hasTitle ? 1 : 0; |
| | | } |
| | | |
| | | @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 (CollectionUtils.isNotEmpty(cellList)) { |
| | | if (CollUtil.isNotEmpty(cellList)) { |
| | | // the judge is necessary |
| | | if (cell.getRowIndex() == 1 && cell.getColumnIndex() == 0) { |
| | | if (cell.getRowIndex() == rowIndex && cell.getColumnIndex() == 0) { |
| | | for (CellRangeAddress item : cellList) { |
| | | sheet.addMergedRegion(item); |
| | | } |
| | |
| | | } |
| | | |
| | | @SneakyThrows |
| | | private static List<CellRangeAddress> handle(List<?> list, boolean hasTitle) { |
| | | private List<CellRangeAddress> handle(List<?> list, boolean hasTitle) { |
| | | List<CellRangeAddress> cellList = new ArrayList<>(); |
| | | if (CollectionUtils.isEmpty(list)) { |
| | | if (CollUtil.isEmpty(list)) { |
| | | return cellList; |
| | | } |
| | | Class<?> clazz = list.get(0).getClass(); |
| | | Field[] fields = clazz.getDeclaredFields(); |
| | | 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<>(); |
| | |
| | | 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()); |
| | | 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); |
| | | } |
| | | } |
| | | } |
| | | // 行合并开始下标 |
| | | int rowIndex = hasTitle ? 1 : 0; |
| | | |
| | | 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); |
| | | String name = field.getName(); |
| | | String methodName = "get" + name.substring(0, 1).toUpperCase() + name.substring(1); |
| | | Method readMethod = clazz.getMethod(methodName); |
| | | Object val = readMethod.invoke(list.get(i)); |
| | | Object val = ReflectUtils.invokeGetter(list.get(i), field.getName()); |
| | | |
| | | int colNum = mergeFieldsIndex.get(j); |
| | | if (!map.containsKey(field)) { |