java excel转图片
时间: 2023-08-04 11:21:02 浏览: 36
可以使用Apache POI和Java的图形库来将Excel表格转换为图片。下面是一个简单的示例代码:
```java
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;
import javax.imageio.ImageIO;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.usermodel.WorkbookFactory;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
public class ExcelToImageConverter {
public static void main(String[] args) throws Exception {
// 读取Excel文件
Workbook workbook = WorkbookFactory.create(new File("test.xlsx"));
// 获取第一个Sheet
Sheet sheet = workbook.getSheetAt(0);
// 计算表格的宽度和高度(像素)
int width = 0, height = 0;
for (int i = 0; i <= sheet.getLastRowNum(); i++) {
Row row = sheet.getRow(i);
if (row != null) {
int rowWidth = 0, rowHeight = 0;
for (int j = 0; j < row.getLastCellNum(); j++) {
Cell cell = row.getCell(j);
if (cell != null) {
int cellWidth = sheet.getColumnWidth(j);
rowWidth += cellWidth;
int cellHeight = row.getHeight();
rowHeight = Math.max(rowHeight, cellHeight);
}
}
width = Math.max(width, rowWidth);
height += rowHeight;
}
}
// 创建图片
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics2D graphics = image.createGraphics();
graphics.setBackground(Color.WHITE);
graphics.clearRect(0, 0, width, height);
// 将表格绘制到图片上
int x = 0, y = 0;
for (int i = 0; i <= sheet.getLastRowNum(); i++) {
Row row = sheet.getRow(i);
if (row != null) {
int rowHeight = 0;
for (int j = 0; j < row.getLastCellNum(); j++) {
Cell cell = row.getCell(j);
if (cell != null) {
int cellWidth = sheet.getColumnWidth(j);
int cellHeight = row.getHeight();
graphics.setColor(Color.BLACK);
graphics.drawRect(x, y, cellWidth, cellHeight);
graphics.setColor(Color.BLACK);
String cellValue = cell.getStringCellValue();
graphics.drawString(cellValue, x + 2, y + cellHeight - 2);
x += cellWidth;
rowHeight = Math.max(rowHeight, cellHeight);
}
}
x = 0;
y += rowHeight;
}
}
graphics.dispose();
// 将图片保存到文件
ImageIO.write(image, "PNG", new FileOutputStream("test.png"));
}
}
```
这个示例代码可以将Excel表格转换为PNG图片。你可以根据实际需要进行修改和扩展。