POI 操作Excel 的相关方法

1.创建一个新的Excle工作薄

 

// 创建新的Excel 工作簿 

HSSFWorkbook workbook = new HSSFWorkbook(); 

 

// 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");  

 

2. 创建新行(row),并将单元格(cell)放入其中. 行号从0开始计算.

 

HSSFRow row = sheet.createRow((short) 1); 

3.设置sheet名称和单元格内容为中文

 

wb.setSheetName(n, "中文",HSSFCell.ENCODING_UTF_16);        

cell.setEncoding((short) 1);    

cell.setCellValue("中文");   

4.设置列宽、行高

 

sheet.setColumnWidth((short)column,(short)width);    

row.setHeight((short)height);   

5.添加区域，合并单元格

 

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

 

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

 

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

 

//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));