Java导出excel合并单元格边框消失问题

合并单元格代码：

//合并单元格CellRangeAddress cellRangeAddress = new CellRangeAddress(0, 1, 0, 0);sheet.addMergedRegion(cellRangeAddress);//加入边框setBorderStyle(BorderStyle.THIN, cellRangeAddress, sheet);

CellRangeAddress参数说明

前二个参数：第几行到第几行合并

后二个参数：第几列到第几列合并

合并后加入边框代码：

/*** 合并单元格设置边框* @param* @param cellRangeTitle* @param sheet*/private void setBorderStyle(BorderStyle borderStyle, CellRangeAddress cellRangeTitle, Sheet sheet){RegionUtil.setBorderBottom(borderStyle, cellRangeTitle, sheet);//下边框RegionUtil.setBorderLeft(borderStyle, cellRangeTitle, sheet);//左边框RegionUtil.setBorderRight(borderStyle, cellRangeTitle, sheet);//右边框RegionUtil.setBorderTop(borderStyle, cellRangeTitle, sheet);//上边框}