http://poi.apache.org/spreadsheet/quick-guide.html#DataFormats
其中
//行高
rowAll.setHeightInPoints((5*sheet.getDefaultRowHeightInPoints()));
//合并cell
sheet.addMergedRegion(new CellRangeAddress(0,0,0,headers.length));
导出文件名乱码
response.addHeader("Content-Disposition", "attachment;filename="
+ new String(name.getBytes("gb2312"), "iso8859-1"));
列长度适应
sheet.autoSizeColumn(y);