解析XML与DOM中不同层次具有相同名称的标签 [英] Parsing XML with tags with same name on different levels in DOM

问题描述

我已经在这几天并不能找到一个方法来解析这个XML文件。 我试过XMLPullParser，SAX和DOM现在，但只要我已经取得了一些进展，我意识到，我有两个不同的＆LT; CON＆GT; 标签。我是新来的Java和Android，尤其是新的XML解析，所以任何帮助将意味着很多。

I've been at this for days and cannot find a way to parse this XML file. I've tried XMLPullParser, SAX and now DOM, but as soon as I'd made some progress, I realized that I have two different <con> tags. I'm new to Java and Android, and especially new to XML parsing, so any help would mean a lot.

下面是XML文件的一个片段：

Here's a segment of the xml file:

<data>
      <con id="f3cVQQjz8jr">
        <con idref="nJ4haotQTo0"/>
        <added order="9">2013-08-22T03:14:13.439Z</added>
        <name>Alex</name>
        <rank>0</rank>
      </con>
      <con id="nJ4haotQTo0">
        <added order="10">2013-08-22T03:14:13.439Z</added>
        <name>Charley</name>
        <rank>-2</rank>
      </con>
      <con id="jadh7bH25mI">
        <added order="11">2013-08-22T03:14:13.439Z</added>
        <name>David</name>
        <rank>1227133510</rank>
      </con>
      <con id="erfhZ_dn0HA">
        <con idref="nJ4haotQTo0"/>
        <added order="12">2013-08-22T03:14:13.439Z</added>
        <name>Sebastien</name>
        <rank>1073741824</rank>
      </con>
</data>

正如你所看到的，并非所有的部分有一个孩子＆LT; CON＆GT; 标签，所以我不认为使用计数器会工作

As you can see, not all sections have a child <con> tag, so I don't think using a counter would work.

下面是我的最新尝试（没有做任何事情的嵌套＆LT; CON＆GT; 标签）：

Here's my latest attempt (doesn't do anything about the nested <con> tags):

 public void parseContext()
    {
        NodeList nodeList = doc.getElementsByTagName("con");
        int size = nodeList.getLength();
        for(int i = 0 ; i < size ; i++)
        {


            System.out.println("---------------Context ("+i+")--------------------");
            Node node = nodeList.item(i);
            if(node.getNodeType() == Node.ELEMENT_NODE)
            {
                Element e = (Element) node;
                NodeList resultNodeList = e.getElementsByTagName("name");
                int resultNodeListSize = resultNodeList.getLength();
                for(int j = 0 ; j < resultNodeListSize ; j++ )
                {
                    Node resultNode = resultNodeList.item(j);
                    if(resultNode.getNodeType() == Node.ELEMENT_NODE)
                    {
                        Element resultE = (Element) resultNode;
                        System.out.println("Context Name :"+resultE.getTextContent());
                    }
                }
            }
        }

    }

这会导致：

---------------Context (0)--------------------
Context Name :Alex
---------------Context (1)--------------------
Context Name :Charley
---------------Context (2)--------------------
---------------Context (3)--------------------
Context Name :David
---------------Context (4)--------------------
Context Name :Sebastien
---------------Context (5)--------------------
...

我想有是这样的：

What I'd like to have is something like this:

---------------Context (0)--------------------
Context Name :Alex
Context ID Ref: duRjfksjf0
---------------Context (1)--------------------
Context Name :Charley
Context ID Ref: null
---------------Context (3)--------------------
Context Name :David
Context ID Ref: null
---------------Context (4)--------------------
Context Name :Sebastien
Context ID Ref: iJ4hasftQTo0
---------------Context (5)--------------------
....

此外，该文件是更长的时间，并且有之间是否存在是一个 IDREF 无图案。 我最终会在父解析所有的数据＆LT; CON＆GT; 标签，但我能明白这一点，如果我知道如何处理孩子＆LT; CON＆GT; 标记

Again, the document is much longer, and there is no pattern between whether or not there is an idref. I will eventually be parsing all the data within the parent <con> tags, but I would be able to figure that out if I knew how to deal with the child <con> tag.

我搜索，发现这个：<一href="http://stackoverflow.com/questions/13245874/how-to-differentiate-parent-and-child-tag-while-dom-parsing">How区分父母和孩子的标签，而DOM解析？虽然没有有用的答案。没有问题，我发现在不同的层次相同名称涉及标签。我知道是有很多类似的问题，并就明白了，如果这被删除。虽然再次，我真的AP preciate的帮助。

I searched and found this: How to differentiate parent and child tag while dom parsing? though there were no helpful answers. No questions I found involved tags with same names on different levels. I know there're a lot of similar questions, and will understand if this gets deleted. Though again, I'd really appreciate the help.

推荐答案

试试这个...

if(node.getNodeType() == Node.ELEMENT_NODE){
    Element e = (Element) node;
    NodeList resultNodeList = e.getElementsByTagName("con");           

    if(!e.hasAttribute("idref")){
        if(resultNodeList.getLength() == 2){
            Element nameElement = (Element) resultNodeList.item(1); 
            if(!nameElement.hasAttribute("idref"))
                 System.out.println("Context ID Ref : "+null);
            else    
                 System.out.println("Context ID Ref :"+nameElement.getAttribute("idref"));
        }else {
            Element nameElement = (Element) resultNodeList.item(0);   
            if(!nameElement.hasAttribute("idref"))
                 System.out.println("Context ID Ref : "+null);
            else    
                 System.out.println("Context ID Ref :"+nameElement.getAttribute("idref"));
        }
    }
}

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