POI導出excel報錯：The maximum number of cell styles was exceeded. You can define up to 4000 styles in a .xls workbook

本文轉載自查看原文 2022-03-23 15:39 785 JAVA

java.lang.IllegalStateException: The maximum number of cell styles was exceeded. You can define up to 4000 styles in a .xls workbook
at org.apache.poi.hssf.usermodel.HSSFWorkbook.createCellStyle(HSSFWorkbook.java:1262) ~[poi-4.1.2.jar:4.1.2]

原因是由於創建了太多的 cell styles，所以一般把cellstyle設置放到循環外面

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