Get Stuck while parsing Document object?
I am trying to parse my Document object which is like;
<message>
<header>
<messageType>snmp</messageType>
<sendFrom>localhost</sendFrom>
<hostName>localhost</hostName>
<sendTo>192.168.0.15</sendTo>
<receiverName>receiverHost</receiverName>
<date>06/10/2011 17:34:55</date>
</header>
<body>
<snmpType>set</snmpType>
<ip>127.0.0.1</ip>
<community>public</community>
<variables>
<variableBinding>
<variable>TechDive.in</variable>
<OID>1.3.6.1.4.1.8072.3.2.10</OID>
</variableBinding>
<variableBinding>
<variable>TechDive.in</variable>
<OID>1.3.6.1.4.1.8072.3.2.10</OID>
</variableBinding>
<variableBinding>
<variable>TechDive.in</variable>
<OID>1.3.6.1.4.1.8072.3.2.10</OID>
</variableBinding>
<variableBinding>
<variable>TechDive.in</variable>
<OID>1.3.6.1.4.1.8072.3.2.10</OID>
</variableBinding>
</variables>
</body>
</message>
I want to get all off the <variableBinding>s which are under the <variables>, I really get stuck about it since I am a noob in XML parsing.
I am trying to write a function which is ;
public Vector<VariableBinding> getVariables(Document document){
Vector<VariableBinding> variables = new Vector<VariableBinding>();
Element root = document.getRootElement();
Element body = root.getChi开发者_如何转开发ld("body");
Element oidsElement = body.getChild("variables");
Element variable = oidsElement.getChild("variable");
for (Object currentOidObj : variable.getChildren()) {
Element currentOid = (Element) currentOidObj;
String oid = currentOid.getText();
Element currentVariable = (Element) currentOidObj;
Variable var = new OctetString(currentVariable.getText());
OID oidObj = new OID(oid);
VariableBinding v = new VariableBinding(oidObj,var);
variables.add(v);
}
return variables;
}
Can you please help me to get <variableBinding>s ?
Thank you all
Have you considered using XPath?
//variableBinding will select all variableBinding elements.
E.g.:
XPathFactory factory = XPathFactory.newInstance();
XPath xpath = factory.newXPath();
XPathExpression expr = xpath.compile("//variableBinding");
Object result = expr.evaluate(doc, XPathConstants.NODESET);
NodeList nodes = (NodeList) result;
for (int i = 0; i < nodes.getLength(); i++) {
...
}
You need to do something likes this:
public Vector<VariableBinding> getVariables(Document document){
Vector<VariableBinding> variables = new Vector<VariableBinding>();
Element root = document.getRootElement();
Element body = root.getChild("body");
Element oidsElement = body.getChild("variables");
for (Object ovb: oidsElement.getChildren("variableBinding")) {
Element vb = (Element) ovb;
Variable var = new OctetString(vb.getChild("OID").getText());
OID oidObj = new OID(vb.getChild("variable").getText());
VariableBinding v = new VariableBinding(oidObj,var);
variables.add(v);
}
return variables;
}
Sounds like a SAX parser would be better for you to use. This blog gives a simple example of using a SAX parser to parse XML.
http://www.mkyong.com/java/how-to-read-xml-file-in-java-sax-parser/
----EDIT---- Actually, here's a better one http://cs.au.dk/~amoeller/XML/programming/saxexample.html
加载中,请稍侯......
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