我找到了解决这个问题的方法,你可以使用Aspose-Word Java库来实现。主要方法如下:
public static void main(String[] args) throws Exception {
String dataDir = "D://test//";
Document doc = new Document(dataDir + "TestFile.doc");
RenderCellToImage(dataDir, doc);
}
//将单元格呈现为图像
public static void RenderCellToImage(String dataDir, Document doc)
throws Exception {
Cell cell = (Cell) doc.getChild(NodeType.CELL, 0, true);
RenderNode(cell, dataDir + "TestFile.RenderCell".png",
null);
System.out.println("Cell rendered to image__successfully.");
}
}
// / <summary>
// / Renders any node in a document to the path specified using the image
// save options.
// / </summary>
// / <param name="node">The node to render.</param>
// / <param name="path">The path to save the rendered image to.</param>
// / <param name="imageOptions">The image options to use during rendering.
// This can be null.</param>
public static void RenderNode(Node node, String filePath,
ImageSaveOptions imageOptions) throws Exception {
// Run some argument checks.
if (node == null)
throw new IllegalArgumentException("Node cannot be null");
// If no image options are supplied, create default options.
if (imageOptions == null)
imageOptions = new ImageSaveOptions(FileFormatUtil.extensionToSaveFormat((filePath.split("\\.")[filePath
.split("\\.").length - 1])));
// Store the paper color to be used on the final image and change to
// transparent.
// This will cause any content around the rendered node to be removed
// later on.
Color savePaperColor = imageOptions.getPaperColor();
// imageOptions.PaperColor = Color.Transparent;
imageOptions.setPaperColor(new Color(0, 0, 0, 0));
// There a bug which affects the cache of a cloned node. To avoid this
// we instead clone the entire document including all nodes,
// find the matching node in the cloned document and render that
// instead.
Document doc = (Document) node.getDocument().deepClone(true);
node = doc.getChild(NodeType.ANY,node.getDocument().getChildNodes(NodeType.ANY, true).indexOf(node), true);
// Create a temporary shape to store the target node in. This shape will
// be rendered to retrieve
// the rendered content of the node.
Shape shape = new Shape(doc, ShapeType.TEXT_BOX);
Section parentSection = (Section) node.getAncestor(NodeType.SECTION);
// Assume that the node cannot be larger than the page in size.
shape.setWidth(parentSection.getPageSetup().getPageWidth());
shape.setHeight(parentSection.getPageSetup().getPageHeight());
shape.setFillColor(new Color(0, 0, 0, 0)); // We must make the shape and
// paper color transparent.
// Don't draw a surrounding line on the shape.
shape.setStroked(false);
// Move up through the DOM until we find node which is suitable to
// insert into a Shape (a node with a parent can contain paragraph,
// tables the same as a shape).
// Each parent node is cloned on the way up so even a descendant node
// passed to this method can be rendered.
// Since we are working with the actual nodes of the document we need to
// clone the target node into the temporary shape.
Node currentNode = node;
while (!(currentNode.getParentNode() instanceof InlineStory
|| currentNode.getParentNode() instanceof Story || currentNode
.getParentNode() instanceof ShapeBase)) {
CompositeNode parent = (CompositeNode) currentNode.getParentNode()
.deepClone(false);
currentNode = currentNode.getParentNode();
parent.appendChild(node.deepClone(true));
node = parent; // Store this new node to be inserted into the shape.
}
// We must add the shape to the document tree to have it rendered.
shape.appendChild(node.deepClone(true));
parentSection.getBody().getFirstParagraph().appendChild(shape);
// Render the shape to stream so we can take advantage of the effects of
// the ImageSaveOptions class.
// Retrieve the rendered image and remove the shape from the document.
ByteArrayOutputStream stream = new ByteArrayOutputStream();
shape.getShapeRenderer().save(stream, imageOptions);
shape.remove();
// Load the image into a new bitmap.
BufferedImage renderedImage = ImageIO.read(new ByteArrayInputStream(
stream.toByteArray()));
// Extract the actual content of the image by cropping transparent space
// around
// the rendered shape.
Rectangle cropRectangle = FindBoundingBoxAroundNode(renderedImage);
BufferedImage croppedImage = new BufferedImage(cropRectangle.width,
cropRectangle.height, BufferedImage.TYPE_INT_RGB);
// Create the final image with the proper background color.
Graphics2D g = croppedImage.createGraphics();
g.setBackground(savePaperColor);
g.clearRect(0, 0, croppedImage.getWidth(), croppedImage.getHeight());
g.drawImage(renderedImage, 0, 0, croppedImage.getWidth(),
croppedImage.getHeight(), cropRectangle.x, cropRectangle.y,
cropRectangle.x + cropRectangle.width, cropRectangle.y
+ cropRectangle.height, null);
ImageIO.write(croppedImage, "png", new File(filePath));
}