poi合并单元格加边框（2）
利用org.apache.poi.ss.util.RegionUtil 来处理合并单元格加边框问题
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private static void setRegionBorder(int border, CellRangeAddress region, Sheet sheet,Workbook wb){RegionUtil.setBorderBottom(border,region, sheet, wb);RegionUtil.setBorderLeft(border,region, sheet, wb);RegionUtil.setBorderRight(border,region, sheet, wb);RegionUtil.setBorderTop(border,region, sheet, wb);}?
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注意：如果合并在前，则在后面不能直接用
?????? Row row=sheet.createRow(0);
???????? 而应该改为
????? ?Row row=sheet.getRow(0);
???????if(row==null){
? ????????? row2=sheet.createRow(2);
????? ?}
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?????????否则直接createRow会覆盖先前合并时定义的边框样式。造成合并后边框显示不全的问题。
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