将Excel的单元格变成图片可以用什么库 java代码
时间: 2024-05-13 07:15:41 浏览: 18
你可以使用Apache POI和JavaFX库来将Excel单元格转换为图片。
首先,你需要使用Apache POI库来读取Excel文件中的单元格内容,然后使用JavaFX库将其转换为图片。
下面是一个示例代码:
```java
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.usermodel.WorkbookFactory;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import javafx.application.Application;
import javafx.embed.swing.SwingFXUtils;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.SnapshotParameters;
import javafx.scene.image.WritableImage;
import javafx.scene.layout.AnchorPane;
import javafx.scene.paint.Color;
import javafx.stage.Stage;
public class ExcelToImage extends Application {
private static final double CELL_WIDTH = 64;
private static final double CELL_HEIGHT = 20;
public static void main(String[] args) {
launch(args);
}
@Override
public void start(Stage primaryStage) throws Exception {
List<String[]> data = readExcelFile("data.xlsx");
AnchorPane anchorPane = new AnchorPane();
anchorPane.setPrefWidth(800);
anchorPane.setPrefHeight(600);
double y = 0;
for (String[] row : data) {
double x = 0;
for (String cell : row) {
Group group = new Group();
group.setStyle("-fx-background-color: white;");
group.setPrefWidth(CELL_WIDTH);
group.setPrefHeight(CELL_HEIGHT);
group.setLayoutX(x);
group.setLayoutY(y);
AnchorPane.setLeftAnchor(group, x);
AnchorPane.setTopAnchor(group, y);
anchorPane.getChildren().add(group);
x += CELL_WIDTH;
}
y += CELL_HEIGHT;
}
Scene scene = new Scene(anchorPane, Color.WHITE);
primaryStage.setScene(scene);
WritableImage image = anchorPane.snapshot(new SnapshotParameters(), null);
File file = new File("image.png");
try (FileOutputStream out = new FileOutputStream(file)) {
javax.imageio.ImageIO.write(SwingFXUtils.fromFXImage(image, null), "png", out);
} catch (IOException e) {
e.printStackTrace();
}
primaryStage.show();
}
public List<String[]> readExcelFile(String fileName) {
List<String[]> data = new ArrayList<>();
try (Workbook workbook = WorkbookFactory.create(new File(fileName))) {
Sheet sheet = workbook.getSheetAt(0);
for (Row row : sheet) {
List<String> rowData = new ArrayList<>();
for (Cell cell : row) {
switch (cell.getCellType()) {
case STRING:
rowData.add(cell.getStringCellValue());
break;
case NUMERIC:
rowData.add(String.valueOf(cell.getNumericCellValue()));
break;
case BOOLEAN:
rowData.add(String.valueOf(cell.getBooleanCellValue()));
break;
case BLANK:
rowData.add("");
break;
default:
rowData.add("");
break;
}
}
data.add(rowData.toArray(new String[rowData.size()]));
}
} catch (IOException e) {
e.printStackTrace();
}
return data;
}
}
```
在这个示例中,我们首先使用`readExcelFile`方法从Excel文件中读取数据,然后使用JavaFX库将每个单元格转换为一个带有白色背景的Group对象,并将它们添加到AnchorPane中。最后,我们使用`anchorPane.snapshot`方法将AnchorPane对象转换为一个可写的图像,并将其保存到文件中。
请注意,此示例是基于JavaFX 8编写的。如果你使用的是JavaFX 11或更高版本,则需要使用`javafx.graphics`模块中的`WritableImage`类和`SwingFXUtils`类来将JavaFX图像转换为Java Swing图像。