POI将带base64编码图片的html语句写入Excel,并保留格式
时间: 2024-03-21 10:38:18 浏览: 153
POI把图片写到excel表中
好的,你可以使用poi和apache commons codec库来完成这个任务。首先,你需要将base64编码的图片解码成byte数组,然后将其插入到Excel中。以下是一个示例代码:
```java
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import org.apache.commons.codec.binary.Base64;
import org.apache.poi.hssf.usermodel.HSSFClientAnchor;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.util.IOUtils;
public class WriteExcel {
public static void main(String[] args) throws Exception {
// 创建工作簿
Workbook workbook = new HSSFWorkbook();
Sheet sheet = workbook.createSheet("Sheet1");
// 插入图片
String base64Image = "data:image/png;base64,iVBORw0KGg..."; // 这里是你的base64编码图片
byte[] imageBytes = Base64.decodeBase64(base64Image.split(",")[1]);
int pictureIdx = workbook.addPicture(imageBytes, Workbook.PICTURE_TYPE_PNG);
CreationHelper helper = workbook.getCreationHelper();
Drawing drawing = sheet.createDrawingPatriarch();
ClientAnchor anchor = helper.createClientAnchor();
anchor.setCol1(0);
anchor.setRow1(0);
anchor.setCol2(5);
anchor.setRow2(5);
Picture pict = drawing.createPicture(anchor, pictureIdx);
// 插入HTML语句
String html = "<html><head></head><body><h1>Hello World!</h1><img src='cid:image1'></body></html>";
InputStream is = new ByteArrayInputStream(html.getBytes());
int rownum = 1;
int column = 1;
Row row = sheet.createRow(rownum);
Cell cell = row.createCell(column);
cell.setCellValue(helper.createRichTextString(html));
Workbook wb = cell.getSheet().getWorkbook();
CreationHelper creationHelper = wb.getCreationHelper();
Drawing drawing2 = sheet.createDrawingPatriarch();
ClientAnchor anchor2 = creationHelper.createClientAnchor();
anchor2.setCol1(column);
anchor2.setRow1(rownum);
anchor2.setCol2(column + 10);
anchor2.setRow2(rownum + 10);
anchor2.setAnchorType(AnchorType.MOVE_AND_RESIZE);
Picture picture = drawing2.createPicture(anchor2, pictureIdx);
picture.resize();
// 保存工作簿
workbook.write(new FileOutputStream("output.xls"));
workbook.close();
}
}
```
在这个示例代码中,我们首先使用`apache commons codec`库将base64编码的图片解码成byte数组,然后使用`Workbook.addPicture`方法将图片插入到Excel中。接着,我们将要插入的HTML语句写入到单元格中,并使用`Drawing.createPicture`方法将图片插入到HTML语句中。最后,我们将工作簿保存到一个文件中。
需要注意的是,解码base64编码图片可能会抛出`IllegalArgumentException`异常,因此需要进行异常处理。此外,示例代码中使用的是`.xls`格式的Excel文件,如果你需要使用`.xlsx`格式的文件,则需要使用`XSSFWorkbook`类代替`HSSFWorkbook`类。
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