POI操作EXCEL例子代碼

1、遍歷workbook

代碼

// load源文件
POIFSFileSystem fs = new POIFSFileSystem(new FileInputStream(filePath));
HSSFWorkbook wb = new HSSFWorkbook(fs);
for (int i = 0; i < wb.getNumberOfSheets(); i++) {
    HSSFSheet sheet = wb.getSheetAt(i);
    for (int i = sheet.getFirstRowNum(); i < sheet.getLastRowNum(); i ++) {
    HSSFRow row = sheet.getRow(i);
            if (row != null) {
        。。。操作}
       }
     }
// 目標文件
FileOutputStream fos = new FileOutputStream(objectPath);
//寫文件
swb.write(fos);
fos.close();

<script type="text/javascript">render_code();</script>

 

2、得到列和單元格

代碼

HSSFRow row = sheet.getRow(i);
HSSFCell cell = row.getCell((short) j);

<script type="text/javascript">render_code();</script>

 

3、設置sheet名稱和單元格內容爲中文

代碼

wb.setSheetName(n, "中文",HSSFCell.ENCODING_UTF_16);
cell.setEncoding((short) 1);
cell.setCellValue("中文");

<script type="text/javascript">render_code();</script>

 

4、單元格內容未公式或數值，可以這樣讀寫

代碼

cell.setCellType(HSSFCell.CELL_TYPE_NUMERIC);
cell.getNumericCellValue()

<script type="text/javascript">render_code();</script>

 

5、設置列寬、行高

代碼

sheet.setColumnWidth((short)column,(short)width);
row.setHeight((short)height);

<script type="text/javascript">render_code();</script>

 

6、添加區域，合併單元格

代碼

Region region = new Region((short)rowFrom,(short)columnFrom,(short)rowTo,(short)columnTo);
sheet.addMergedRegion(region);
//得到所有區域
sheet.getNumMergedRegions()

<script type="text/javascript">render_code();</script>

 

7、常用方法
根據單元格不同屬性返回字符串數值

代碼

public String getCellStringValue(HSSFCell cell) {
        String cellValue = "";
        switch (cell.getCellType()) {
        case HSSFCell.CELL_TYPE_STRING:
            cellValue = cell.getStringCellValue();
            if(cellValue.trim().equals("")||cellValue.trim().length()<=0)
                cellValue=" ";
            break;
        case HSSFCell.CELL_TYPE_NUMERIC:
            cellValue = String.valueOf(cell.getNumericCellValue());
            break;
        case HSSFCell.CELL_TYPE_FORMULA:
            cell.setCellType(HSSFCell.CELL_TYPE_NUMERIC);
            cellValue = String.valueOf(cell.getNumericCellValue());
            break;
        case HSSFCell.CELL_TYPE_BLANK:
            cellValue=" ";
            break;
        case HSSFCell.CELL_TYPE_BOOLEAN:
            break;
        case HSSFCell.CELL_TYPE_ERROR:
            break;
        default:
            break;
        }
        return cellValue;
    }

<script type="text/javascript">render_code();</script>

8、常用單元格邊框格式

 

虛線HSSFCellStyle.BORDER_DOTTED
實線HSSFCellStyle.BORDER_THIN

代碼

public static HSSFCellStyle getCellStyle(short type)
    {
       HSSFWorkbook wb = new HSSFWorkbook();
       HSSFCellStyle style = wb.createCellStyle();
       style.setBorderBottom(type);//下邊框
        style.setBorderLeft(type);//左邊框
        style.setBorderRight(type);//右邊框
        style.setBorderTop(type);//上邊框
       return style;
    }

<script type="text/javascript">render_code();</script>

9、設置字體和內容位置

代碼

HSSFFont f  = wb.createFont();
f.setFontHeightInPoints((short) 11);//字號
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);//單元格內容的旋轉的角度
HSSFDataFormat df = wb.createDataFormat();
style1.setDataFormat(df.getFormat("0.00%"));//設置單元格數據格式
cell.setCellFormula(string);//給單元格設公式
style.setRotation(short rotation);//單元格內容的旋轉的角度
cell.setCellStyle(style);

<script type="text/javascript">render_code();</script>

10、插入圖片
論壇裏看到的

代碼

//先把讀進來的圖片放到一個ByteArrayOutputStream中，以便產生ByteArray
      ByteArrayOutputStream byteArrayOut = new ByteArrayOutputStream();
      BufferedImage bufferImg = ImageIO.read(new File("ok.jpg"));
      ImageIO.write(bufferImg,"jpg",byteArrayOut);
//讀進一個excel模版
FileInputStream fos = new FileInputStream(filePathName+"/stencil.xlt");
fs = new POIFSFileSystem(fos);
//創建一個工作薄
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));

轉自:http://ltc603.javaeye.com/blog/30040