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update 优化 重构 CellMergeStrategy 支持多级表头修复一些小问题 整理代码结构

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疯狂的狮子li 2023-05-10 18:34:01 +08:00
parent a558939d0f
commit 48ee686ade
1 changed files with 29 additions and 21 deletions
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44
ruoyi-common/ruoyi-common-excel/src/main/java/org/dromara/common/excel/core/CellMergeStrategy.java
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@ -1,19 +1,20 @@
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;
@ -24,20 +25,27 @@ import java.util.Map;
*
* @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;
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);
}
@ -46,13 +54,13 @@ public class CellMergeStrategy extends AbstractMergeStrategy {
}
@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<>();
@ -62,19 +70,19 @@ public class CellMergeStrategy extends AbstractMergeStrategy {
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);
}
}
// 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)) {