将Excel的单元格变成图片可以用什么库 java代码
时间: 2024-05-04 19:19:04 浏览: 11
你可以使用 Apache POI 和 Apache Batik 来将 Excel 单元格转换为图片。下面是一个简单的 Java 代码示例:
```java
import java.io.*;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.*;
import org.apache.batik.dom.svg.SVGDOMImplementation;
import org.apache.batik.svggen.SVGGraphics2D;
import org.apache.batik.svggen.SVGGraphics2DIOException;
import org.w3c.dom.DOMImplementation;
import org.w3c.dom.Document;
public class ExcelToImage {
public static void main(String[] args) {
try {
// Load Excel file
FileInputStream input = new FileInputStream(new File("input.xlsx"));
Workbook workbook = new XSSFWorkbook(input);
Sheet sheet = workbook.getSheetAt(0);
// Get cell as SVG
Cell cell = sheet.getRow(0).getCell(0);
String svg = getCellAsSvg(cell);
// Convert SVG to image
OutputStream output = new FileOutputStream(new File("output.png"));
convertSvgToImage(svg, output);
// Clean up
output.close();
workbook.close();
input.close();
} catch (Exception e) {
e.printStackTrace();
}
}
private static String getCellAsSvg(Cell cell) throws Exception {
DOMImplementation domImpl = SVGDOMImplementation.getDOMImplementation();
Document document = domImpl.createDocument(SVGDOMImplementation.SVG_NAMESPACE_URI, "svg", null);
SVGGraphics2D svgGenerator = new SVGGraphics2D(document);
svgGenerator.setSVGCanvasSize(cell.getRow().getHeightInPoints(), cell.getRow().getHeightInPoints());
cell.setCellValue("Hello, world!");
cell.setCellType(CellType.STRING);
cell.getCellStyle().setVerticalAlignment(VerticalAlignment.CENTER);
cell.getCellStyle().setAlignment(HorizontalAlignment.CENTER);
cell.getCellStyle().setFont(new XSSFFont());
workbook.write(svgGenerator);
return svgGenerator.getSVGDocument().toString();
}
private static void convertSvgToImage(String svg, OutputStream output) throws Exception {
TranscoderInput input = new TranscoderInput(new StringReader(svg));
TranscoderOutput transcoderOutput = new TranscoderOutput(output);
PNGTranscoder transcoder = new PNGTranscoder();
transcoder.transcode(input, transcoderOutput);
}
}
```
这个例子将第一个单元格转换成 SVG,然后将 SVG 转换成 PNG 图片。你可以修改代码来处理多个单元格,并设置转换后的图片大小和格式。