POI操作Excel文档－中级篇

POI操作Excel文档－中级篇

1、遍历workbook

// 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}
       }
     }
// 目标文件
FileOutputStream fos = new
 FileOutputStream(objectPath);
//写文件
swb.write(fos);
fos.close();

// 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}
       }
     }
// 目标文件
FileOutputStream fos = new FileOutputStream(objectPath);
//写文件
swb.write(fos);
fos.close();

2、得到列和单元格

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

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

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"
);

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

4、单元格内容未公式或数值，可以这样读写

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

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

5、设置列宽、行高

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

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

6、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()

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

7、常用方法
根据单元格不同属性返回字符串数值

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;
    }

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;
	}

8、常用单元格边框格式

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;
    }

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;
    }

9、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);

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);

10、插入图片
论坛里看到的

//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));

评论

1 楼 yueyueaihuihui 2009-03-15  

真是好文章 ！谢谢！看来这个论坛不错！