String pageId = getNextTextValue("cid", parser); // get pageId
current = parser.nextToken(); // move to field: segments
assertExpectedFiled(parser.getCurrentName(), "segments", parser.getCurrentLocation());
PageInstance pageInstance = new PageInstance();
pageInstance.setCid(pageId);
pageInstance.setSid(Long.valueOf(instanceId));
pageInstance.setSegments(parseSegments(parser));
return pageInstance;
// 构建组件树，用于递归渲染
// pageInstance.buildComponentTree();
}