如何在xml dom解析器中获取节点列表的值? [英] How to get value of node list in xml dom parser?

问题描述

我有一个像这样的 XML ::

I have one XML which look like this ::

<Channels>
       <Channel Id="511" Title="Test" ChannelDescription="This is Test Channel./>
</Channels>

我成功解析了这种 XML.我的问题是，当我启动 webservice 时，如果没有来自服务器的身份验证，那么 webservice 响应如下::

I am successfully parse this kind of XML.My Problem is that when i fired the webservice and if there is no authentication from the server then the webservice response like this::

<AuthenticationError>An Active Session Already Exists For This User.</AuthenticationError>

那么我如何检查根节点是身份验证错误"还是注释".如果我得到身份验证错误标签，那么我怎样才能得到它的节点值，即此用户的活动会话已经存在."??

So how can i check that root node is "Authentication Error" or "Notes". And if i get the Authentication Error tag then how can i get its node value which is "An Active Session Already Exists For This User."??

XML 解析代码是这样的::

Code for XML Parsing is this::

NodeList node =null;
node= (NodeList)result.getElementsByTagName("Channels");


for(int j=0;j<node.getLength();j++)
{                             
Node aNode=node.item(j);  
Element fstElmnt = (Element) aNode;

NodeList websiteList = fstElmnt.getElementsByTagName("Channel");
int check=websiteList.getLength();

for(int k=0;k<check;k++)
{
    DatabaseConstant myChannels = new DatabaseConstant();
    Node checkNode=websiteList.item(k);

    Element websiteElement = (Element) checkNode;                                                                               
    myChannels.id=websiteElement.getAttribute("Id");
    myChannels.title=websiteElement.getAttribute("Title");

    channel .add(myChannels);
    }
}
}

我希望我的问题很清楚...请尽快提供解决方案.提前致谢....

I hope my question is clear... Please provide the solution asap. Thanks in Advance....

推荐答案

使用 getDocumentElement() 获取 root Element，然后使用 getTagName()代码>获取标签名称.

Use getDocumentElement() to get root Element, then use getTagName() to get tag name.

示例:

    Element root = result.getDocumentElement();
    String name = root.getTagName();

    if(name.equalsIgnoreCase("AuthenticationError") )
    {
        String value = myDocument.getDocumentElement().getTextContent();
        System.out.println("Error:" + value);
    }
    else if(name.equalsIgnoreCase("Notes") )
    {
       NodeList nodes = root.getElementsByTagName("Channels");

       for(int i = 0 ; i < nodes.getLength() ; i ++)
       {
           //-----do something with channels nodes--
       }
    }

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