poi读取visio转成mxgraph xml格式详细代码

下面是将Visio文件转换为mxGraph XML格式的详细代码：

1. 首先，需要在项目中引入mxGraph和poi库：

<dependency>
    <groupId>com.mxgraph</groupId>
    <artifactId>mxgraph</artifactId>
    <version>4.2.2</version>
</dependency>

<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi</artifactId>
    <version>4.1.2</version>
</dependency>

2. 接下来，创建一个类来实现Visio文件解析和转换：

import com.mxgraph.util.mxXmlUtils;
import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.openxml4j.opc.OPCPackage;
import org.apache.poi.xdgf.usermodel.XDGFDocument;
import org.apache.poi.xdgf.usermodel.XDGFMaster;
import org.apache.poi.xdgf.usermodel.XDGFPage;
import org.apache.poi.xdgf.usermodel.XDGFShape;
import org.w3c.dom.Document;
import org.w3c.dom.Element;

import java.io.File;
import java.io.IOException;

public class VisioToMxGraphConverter {

    public static String convert(File visioFile) throws IOException, InvalidFormatException {
        // Load Visio document
        XDGFDocument document = new XDGFDocument(OPCPackage.open(visioFile));

        // Create mxGraph XML document
        Document mxGraphDoc = mxXmlUtils.createDocument();
        Element mxGraphRoot = mxGraphDoc.createElement("mxGraphModel");
        mxGraphDoc.appendChild(mxGraphRoot);

        // Iterate through pages
        for (XDGFPage page : document.getPages()) {
            // Iterate through shapes
            for (XDGFShape shape : page.getShapes()) {
                // Convert Visio shape to mxGraph cell
                Element mxCell = convertShape(shape, mxGraphDoc);
                mxGraphRoot.appendChild(mxCell);
            }
        }

        // Convert mxGraph XML document to string
        return mxXmlUtils.getXml(mxGraphDoc);
    }

    private static Element convertShape(XDGFShape shape, Document mxGraphDoc) {
        // Create mxGraph cell element
        Element mxCell = mxGraphDoc.createElement("mxCell");

        // Set mxGraph cell attributes
        mxCell.setAttribute("id", "1");
        mxCell.setAttribute("value", shape.getTextAsString());
        mxCell.setAttribute("style", getStyle(shape));
        mxCell.setAttribute("vertex", "1");

        // Set mxGraph geometry element
        Element mxGeometry = mxGraphDoc.createElement("mxGeometry");
        mxGeometry.setAttribute("x", Double.toString(shape.getPinX()));
        mxGeometry.setAttribute("y", Double.toString(shape.getPinY()));
        mxGeometry.setAttribute("width", Double.toString(shape.getWidth()));
        mxGeometry.setAttribute("height", Double.toString(shape.getHeight()));
        mxCell.appendChild(mxGeometry);

        // Set mxGraph parent element
        XDGFMaster master = shape.getMaster();
        if (master != null) {
            Element mxParent = mxGraphDoc.createElement("mxParent");
            mxParent.setAttribute("id", master.getName());
            mxCell.appendChild(mxParent);
        }

        return mxCell;
    }

    private static String getStyle(XDGFShape shape) {
        // TODO: Implement style conversion
        return "";
    }
}

3. 在代码中，需要实现一个getStyle()方法来将Visio形状的样式转换为mxGraph样式。这个方法可以根据具体需求进行实现。

4. 最后，在需要转换Visio文件的地方，调用convert()方法并将Visio文件作为参数传入即可：

File visioFile = new File("path/to/visio/file");
String mxGraphXml = VisioToMxGraphConverter.convert(visioFile);