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优化Excel自定义格式样式重复创建问题

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RuoYi
2026-03-09 15:01:42 +08:00
parent ed916656dd
commit 0d85aa50a7
1 changed files with 12 additions and 0 deletions
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12
ruoyi-common/src/main/java/com/ruoyi/common/utils/poi/ExcelUtil.java
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@@ -106,6 +106,11 @@ public class ExcelUtil<T>
*/ */
public Map<String, String> sysDictMap = new HashMap<String, String>(); public Map<String, String> sysDictMap = new HashMap<String, String>();
/**
* 单元格样式缓存
*/
private Map<String, CellStyle> cellStyleCache = new HashMap<String, CellStyle>();
/** /**
* Excel sheet最大行数，默认65536 * Excel sheet最大行数，默认65536
*/ */
@@ -1201,9 +1206,16 @@ public class ExcelUtil<T>
*/ */
private CellStyle createCellStyle(CellStyle cellStyle, String format) private CellStyle createCellStyle(CellStyle cellStyle, String format)
{ {
String key = cellStyle.getIndex() + "|" + format;
CellStyle cached = cellStyleCache.get(key);
if (cached != null)
{
return cached;
}
CellStyle style = wb.createCellStyle(); CellStyle style = wb.createCellStyle();
style.cloneStyleFrom(cellStyle); style.cloneStyleFrom(cellStyle);
style.setDataFormat(wb.getCreationHelper().createDataFormat().getFormat(format)); style.setDataFormat(wb.getCreationHelper().createDataFormat().getFormat(format));
cellStyleCache.put(key, style);
return style; return style;
} }