yudao
/
spring-cloud
mirror of https://gitee.com/zhijiantianya/yudao-cloud.git
3
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

feat：添加自适应列宽处理器并替换默认列宽策略

pull/201/head
YunaiV 2025-07-26 20:09:05 +08:00
parent 3efadfebe5
commit 321e1f5ba1
2 changed files with 24 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

41
yudao-framework/yudao-spring-boot-starter-excel/src/main/java/cn/iocoder/yudao/framework/excel/core/handler/ColumnWidthMatchStyleStrategy.java
View File

@ -1,38 +1,42 @@
package cn.iocoder.yudao.framework.excel.core.handler; package cn.iocoder.yudao.framework.excel.core.handler;
import com.alibaba.excel.enums.CellDataTypeEnum; import cn.hutool.core.collection.CollUtil;
import com.alibaba.excel.metadata.Head; import cn.idev.excel.enums.CellDataTypeEnum;
import com.alibaba.excel.metadata.data.WriteCellData; import cn.idev.excel.metadata.Head;
import com.alibaba.excel.util.MapUtils; import cn.idev.excel.metadata.data.WriteCellData;
import com.alibaba.excel.write.metadata.holder.WriteSheetHolder; import cn.idev.excel.util.MapUtils;
import com.alibaba.excel.write.style.column.AbstractColumnWidthStyleStrategy; import cn.idev.excel.write.metadata.holder.WriteSheetHolder;
import org.apache.commons.collections4.CollectionUtils; import cn.idev.excel.write.style.column.AbstractColumnWidthStyleStrategy;
import cn.idev.excel.write.style.column.LongestMatchColumnWidthStyleStrategy;
import org.apache.poi.ss.usermodel.Cell; import org.apache.poi.ss.usermodel.Cell;
import java.util.HashMap; import java.util.HashMap;
import java.util.List; import java.util.List;
import java.util.Map; import java.util.Map;
/** /**
* 自适应列宽处理器 * Excel 自适应列宽处理器
* *
* 相比 {@link LongestMatchColumnWidthStyleStrategy} 来说，额外处理了 DATE 类型！
*
* @see <a href="https://github.com/YunaiV/yudao-cloud/pull/196/">添加自适应列宽处理器，并替换默认列宽策略</a>
* @author hmb * @author hmb
*/ */
public class ColumnWidthMatchStyleStrategy extends AbstractColumnWidthStyleStrategy { public class ColumnWidthMatchStyleStrategy extends AbstractColumnWidthStyleStrategy {
private static final int MAX_COLUMN_WIDTH = 255;
private final Map<Integer, Map<Integer, Integer>> cache = MapUtils.newHashMapWithExpectedSize(8);
public ColumnWidthMatchStyleStrategy() { private static final int MAX_COLUMN_WIDTH = 255;
}
private final Map<Integer, Map<Integer, Integer>> cache = MapUtils.newHashMapWithExpectedSize(8);
@Override @Override
protected void setColumnWidth(WriteSheetHolder writeSheetHolder, List<WriteCellData<?>> cellDataList, Cell cell, protected void setColumnWidth(WriteSheetHolder writeSheetHolder, List<WriteCellData<?>> cellDataList, Cell cell,
Head head, Head head, Integer relativeRowIndex, Boolean isHead) {
Integer relativeRowIndex, Boolean isHead) { boolean needSetWidth = isHead || CollUtil.isNotEmpty(cellDataList);
boolean needSetWidth = isHead || !CollectionUtils.isEmpty(cellDataList);
if (!needSetWidth) { if (!needSetWidth) {
return; return;
} }
Map<Integer, Integer> maxColumnWidthMap = cache.computeIfAbsent(writeSheetHolder.getSheetNo(), key -> new HashMap<>(16)); Map<Integer, Integer> maxColumnWidthMap = cache.computeIfAbsent(writeSheetHolder.getSheetNo(),
key -> new HashMap<>(16));
Integer columnWidth = dataLength(cellDataList, cell, isHead); Integer columnWidth = dataLength(cellDataList, cell, isHead);
if (columnWidth < 0) { if (columnWidth < 0) {
return; return;
@ -43,10 +47,11 @@ public class ColumnWidthMatchStyleStrategy extends AbstractColumnWidthStyleStrat
Integer maxColumnWidth = maxColumnWidthMap.get(cell.getColumnIndex()); Integer maxColumnWidth = maxColumnWidthMap.get(cell.getColumnIndex());
if (maxColumnWidth == null || columnWidth > maxColumnWidth) { if (maxColumnWidth == null || columnWidth > maxColumnWidth) {
maxColumnWidthMap.put(cell.getColumnIndex(), columnWidth); maxColumnWidthMap.put(cell.getColumnIndex(), columnWidth);
writeSheetHolder.getSheet().setColumnWidth(cell.getColumnIndex(), (columnWidth+3) * 256); writeSheetHolder.getSheet().setColumnWidth(cell.getColumnIndex(), columnWidth * 256);
} }
} }
@SuppressWarnings("EnhancedSwitchMigration")
private Integer dataLength(List<WriteCellData<?>> cellDataList, Cell cell, Boolean isHead) { private Integer dataLength(List<WriteCellData<?>> cellDataList, Cell cell, Boolean isHead) {
if (isHead) { if (isHead) {
return cell.getStringCellValue().getBytes().length; return cell.getStringCellValue().getBytes().length;
@ -69,5 +74,5 @@ public class ColumnWidthMatchStyleStrategy extends AbstractColumnWidthStyleStrat
return -1; return -1;
} }
} }
}
}

1
yudao-framework/yudao-spring-boot-starter-excel/src/main/java/cn/iocoder/yudao/framework/excel/core/util/ExcelUtils.java
View File

@ -4,6 +4,7 @@ import cn.idev.excel.FastExcelFactory;
import cn.idev.excel.converters.longconverter.LongStringConverter; import cn.idev.excel.converters.longconverter.LongStringConverter;
import cn.idev.excel.write.style.column.LongestMatchColumnWidthStyleStrategy; import cn.idev.excel.write.style.column.LongestMatchColumnWidthStyleStrategy;
import cn.iocoder.yudao.framework.common.util.http.HttpUtils; import cn.iocoder.yudao.framework.common.util.http.HttpUtils;
import cn.iocoder.yudao.framework.excel.core.handler.ColumnWidthMatchStyleStrategy;
import cn.iocoder.yudao.framework.excel.core.handler.SelectSheetWriteHandler; import cn.iocoder.yudao.framework.excel.core.handler.SelectSheetWriteHandler;
import jakarta.servlet.http.HttpServletResponse; import jakarta.servlet.http.HttpServletResponse;
import org.springframework.web.multipart.MultipartFile; import org.springframework.web.multipart.MultipartFile;