【记录】POI合并单元格 设置合并后边框

// 合并单元格
sheet.addMergedRegion(new CellRangeAddress(0，1，2，4); // 参数 合并0行到1行，2列到4列区域

// 设置合并单元格后表格边框
setRegionBorder(1,new CellRangeAddress(0，1，2，4),sheet,workbook);

/**
     * 设置合并单元格后表格边框
     * @param border 边框宽度
     * @param region 合并区域
     * @param sheet HSSFSheet
     * @param wb HSSFWorkbook
     * @return void 返回参数说明
     * @exception/throws
     */
    public static void setRegionBorder(int border, CellRangeAddress region, HSSFSheet sheet, HSSFWorkbook 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);
    }