Question

我试图解析以下XML并创建与主要元素对应的Java对象：

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdn.datatables.net/1.10.10/js/jquery.dataTables.min.js"></script>
<link href="https://cdn.datatables.net/1.10.10/css/jquery.dataTables.min.css" rel="stylesheet" />

<input type="button" id="crit1" value="20%" />
<input type="button" id="crit2" value="40%" />
<table id="example" class="display" cellspacing="0" width="100%">
  <thead>
    <tr>
      <th>Name</th>
      <th>Score</th>
    </tr>
  </thead>
  <tfoot>
    <tr>
      <th>Name</th>
      <th>Score</th>
    </tr>
  </tfoot>
  <tbody>

  </tbody>
</table>

所以我想创建Java对象BookCase，它包含一个Book对象列表。

我试图将AutoPilot与XPath一起使用，但是虽然我可以使用主要值（材料=＆＃34; wood＆＃34;，shelf =＆＃34; 12＆＃34;），但我不知道＃39;知道如何遍历listOfBooks并创建两个Book对象。有什么想法吗？

使用下面的简单方法，我可以获取两个Book元素的索引，但我对它们有什么看法？

<bookCase>
   <material>wood</material>
   <shelves>12</shelves>
   ...
   <listOfBooks>
      <book name="book1">
         <author>someone</author>
         <pages>200</pages>
         ...
      </book>
      <book name="book2">
         <author>someone else</author>
         <pages>500</pages>
         ...
      </book>
</bookCase>

如何告诉AutoPilot探索XPath＆＃34; author＆＃34;的值？和＆＃34;页面＆＃34;对于每本书，我都可以在每次AutoPilot探索该部分时创建一个Book对象吗？

Answer 1

好的，下面是探索作者和页面节点的代码......我没假设书籍节点必须有作者或页面节点......

private List<Integer> getBooksNodes(VTDNav vn) throws VTDException {
    final String xpath = "/bookCase/listOfBooks/book";
    ap.selectXPath(xpath);
    final List<Integer> nodeList = new ArrayList<>();
    int node;
    while ((node = ap.evalXPath()) != -1) {
        nodeList.add(node);
        // the logic that browses the pages and author nodes
        // just print em out...
        // remember vn is automatically moved to the xpath output by  
        // autoPilot
        // we are gonna move the cursor manually now
        if (vn.toElement(FIRST_CHILD,"author")){
           int i = vn.getText();
           if (i!=-1)
              System.out.println(" author is ====>" + vn.toString(i));
           vn.toElement(PARENT);
        }

        if (vn.toElement(FIRST_CHILD,"pages")){
           int i = vn.getText();
           if (i!=-1)
              System.out.println(" author is ====>" + vn.toString(i));
           vn.toElement(PARENT);
        }

        // also remember that in a xpath eval loop, if you are gonna 
        // move the cursor manually
        // the node position going into the cursor logic must be identical 
        // to the node position existing the cursor logic
        // an easy way to accomplish this is 
        // vn.push() ;
        // your code that does manual node traversal
        // vn.pop();
        // but the logic above didn't use them
        // because move cursor to child, then moving back, essentially move 
        // the cursor to the original position
    }
    ap.resetXPath();
    return nodeList;
}

vtd-xml解析多次出现的元素

1 个答案: