解析具有相同父子标记的XML，然后使用SAX解析器将父标记的值链接到子标记

I want to parse an XML having same parent-child tag and then link the value of parent tag to child tag using preferably SAX parser.

我想解析具有相同父子标记的XML,然后使用SAX解析器将父标记的值链接到子标记。

This is the XML file

这是XML文件

<?xml version="1.0" encoding="UTF-8"?>

<!-- Protocol header -->
<Protocol id="Diameter customer, country" spec="RFC3588" 
          name="Diameter" version="1.0" 
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
          xsi:noNamespaceSchemaLocation="file:/$CLASSES/cmg/stdapp/diameter/validation/Diameter_addon_schema.xsd">
 <!-- ACR declaration: Start -->
  <Request name="Start">
    <Condition key="Accounting-Record-Type" value="2"/>
    <AVP name="Node-Id" defaultValue="MTAS"/>
    <AVP name="Session-Id"/>
    <AVP name="Origin-Host"/>

        <AVP name="Subscription-Id">
            <AVP name="Subscription-Id-Type"/>
            <AVP name="Subscription-Id-Data"/>
        </AVP>
        <AVP name="IMS-Information">
            <AVP name="Event-Type">
                <AVP name="SIP-Method"/>
            </AVP>
            <AVP name="Role-of-Node"/>
         </AVP> 

  </Request>
<!---->


</Protocol>

In this example a tag with name AVP has child tag with same name AVP. I want to get the value of attribute name and then associate the value of parent to that of child. I use SAX parser for this but I'm unable to distinguish between parent and child but there is no distinction parent and child tags.

在此示例中,名称为AVP的标记具有同名AVP的子标记。我想获取属性名称的值,然后将parent的值与child的值相关联。我使用SAX解析器,但我无法区分父和子,但父和子标签没有区别。

Java Code is

Java代码是

public void startElement(String s, String s1, String elementName, Attributes attributes) throws SAXException
{
    if (elementName.equalsIgnoreCase("AVP")) 
    {
        AVP_Tmp = new AVP();
        String nameValue = attributes.getValue("name");
         if (nameValue == null)
         {
             nameValue =attributes.getValue("value");
         }
         if (nameValue != null)
         {
             AVP_Tmp.set(nameValue,elementName,attributes);
         }
    }
}

@Override
public void endElement(String s, String s1, String element) throws SAXException 
{
    if (element.equals("AVP")) 
    {
        Object key = AVP_Tmp.tmpValue;
        Object value = AVP_Tmp.tmpValue;
        AVPL.put(key, value);                       
    }
}

The AVP_Tmp is a class whose set method is as follows:

AVP_Tmp是一个类,其set方法如下:

public void set(String nameValue, String qName, Attributes attrs)//, int k)
{
    int len = attrs.getLength();
    tmpValue=qName + "-->" + nameValue;
    List list = new ArrayList();
    for (int i = 0; i < len; i++)
    {
        list.add(attrs.getQName(i));
    }
    Collections.sort(list);
    for (int i = 0; i < len; i++)
    {
         name1[i]= (Object)list.get(i);
         value1[i]=(attrs.getValue((String) list.get(i)));
        tmpValue=tmpValue+ "\n" +name1[i]+"="+value1[i];
    }
}

I currently have output as:

我目前的输出为:

Node-Id
..
..
Subscription-Id
Subscription-Id-Type
IMS-Information
Event-Type
SIP-Method
..

I want the Output in format like:

我希望输出格式如下:

Node-Id
..
..
..
Subscription-Id#Subscription-Id-Type
IMS-Information#Event-Type#SIP-Method
..

1 个解决方案

#1

When I got your goals right, I would do it the way, that you build the "AVP-Structure" and afterwards extract the needed output.

当我实现你的目标时,我会这样做,你建立“AVP结构”,然后提取所需的输出。

So when a new AVP starts it will look something like that (just in pseudo-code):

因此,当一个新的AVP启动时,它将看起来像那样(只是在伪代码中):

if (parent == null){
   avpTemp = new AVP();
   parent = avpTemp;
} else {avpTemp = new AVP(parent); }

After the parsing, you have got the hierarchy and build the structe/result as you want it.

解析后,您已获得层次结构并根据需要构建结构/结果。

#1