如何使用javascript将mxworkflow编辑器保存为Xml

var xmlDoc = document.implementation.createDocument(null, "root");

var model = editor.graph.getModel();

function traverse(node, parent) {
  var element = xmlDoc.createElement(node.nodeName);
  parent.appendChild(element);
  
  // 添加属性
  var attrs = node.getAttributeNames();
  for (var i = 0; i < attrs.length; i++) {
    var attrName = attrs[i];
    var attrValue = node.getAttribute(attrName);
    element.setAttribute(attrName, attrValue);
  }
  
  // 添加子节点
  var childNodes = node.childNodes;
  for (var i = 0; i < childNodes.length; i++) {
    var childNode = childNodes[i];
    traverse(childNode, element);
  }
}

traverse(model.getRoot(), xmlDoc.documentElement);

var xmlString = new XMLSerializer().serializeToString(xmlDoc);