POI 操作Excel 的相关方法
1.创建一个新的Excle工作薄
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// 创建新的Excel 工作簿?
HSSFWorkbook workbook = new HSSFWorkbook();?
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// 在Excel工作簿中建一工作表，其名为缺省值, 也可以指定Sheet名称?
HSSFSheet sheet = workbook.createSheet();?
//HSSFSheet sheet = workbook.createSheet("SheetName");??
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2. 创建新行(row),并将单元格(cell)放入其中. 行号从0开始计算.
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HSSFRow row = sheet.createRow((short) 1);?
3.设置sheet名称和单元格内容为中文
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wb.setSheetName(n, "中文",HSSFCell.ENCODING_UTF_16);????????
cell.setEncoding((short) 1);????
cell.setCellValue("中文");???
4.设置列宽、行高
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sheet.setColumnWidth((short)column,(short)width);????
row.setHeight((short)height);???
5.添加区域，合并单元格
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Region region = new Region((short)rowFrom,(short)columnFrom,(short)rowTo,(short)columnTo);????
sheet.addMergedRegion(region);????
//得到所有区域????
sheet.getNumMergedRegions()???
6.设置单元格边框格式
虚线HSSFCellStyle.BORDER_DOTTED
实线HSSFCellStyle.BORDER_THIN
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public static HSSFCellStyle getCellStyle(short type){???????
???? HSSFWorkbook wb = new HSSFWorkbook();????
???? HSSFCellStyle style = wb.createCellStyle(); ????
???? style.setBorderBottom(type);//下边框?????
????? style.setBorderLeft(type);//左边框?????
????? style.setBorderRight(type);//右边框?????
????? style.setBorderTop(type);//上边框?????
????? return style;????
}???
7.设置字体和内容位置
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HSSFFont f? = wb.createFont();????
f.setFontHeightInPoints((short) 11);//字号????
f.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);//加粗????
style.setFont(f);????
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);//左右居中????
style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);//上下居中????
style.setRotation(short rotation);//单元格内容的旋转的角度????
HSSFDataFormat df = wb.createDataFormat();????
style1.setDataFormat(df.getFormat("0.00%"));//设置单元格数据格式????
cell.setCellFormula(string);//给单元格设公式????
style.setRotation(short rotation);//单元格内容的旋转的角度????
cell.setCellStyle(style);???
8.插入图片
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//先把读进来的图片放到一个ByteArrayOutputStream中，以便产生ByteArray????
????? ByteArrayOutputStream byteArrayOut = new ByteArrayOutputStream();????
????? BufferedImage bufferImg = ImageIO.read(new File("ok.jpg"));????
????? ImageIO.write(bufferImg,"jpg",byteArrayOut);????
//读进一个excel模版????
FileInputStream fos = new FileInputStream(filePathName+"/stencil.xlt");?????
fs = new POIFSFileSystem(fos);????
//创建一个工作薄????
HSSFWorkbook wb = new HSSFWorkbook(fs);????
HSSFSheet sheet = wb.getSheetAt(0);????
HSSFPatriarch patriarch = sheet.createDrawingPatriarch();????
HSSFClientAnchor anchor = new HSSFClientAnchor(0,0,1023,255,(short) 0,0,(short)10,10);?????????
patriarch.createPicture(anchor , wb.addPicture(byteArrayOut.toByteArray(),HSSFWorkbook.PICTURE_TYPE_JPEG));?
