Java parsing XML using dom4j

Target: Parses the specified XML and returns the data under the specified node in the form of a key = value

Required jar Packages: Dom4j1.6.1.jar, Jaxen-1.1.jar

<?XML version= "1.0" encoding= "UTF-8"?><Soap-env:envelopexmlns:soap-env= "http://schemas.xmlsoap.org/soap/envelope/"Xmlns:soap-enc= "http://schemas.xmlsoap.org/soap/encoding/"Xmlns:xsi= "Http://www.w3.org/2001/XMLSchema-instance"xmlns:xsd= "Http://www.w3.org/2001/XMLSchema">    <Soap-env:body>        <M:mainxmlns:m= "http://webservice.xnhdbbx.org/">            <arg0>                <! [Cdata[<business> <functioncode>400105</functioncode>                        <d401_19>411102</d401_19> <t104_03>1</t104_03> <list> <item id= ' 1 ' > <I201_00>FDAC4FC4                        22f5e339e04000</i201_00> </item> </list>                        <remark1/> <remark2/> <remark3/>                <remark4/> <remark5/> </business> ]]>            </arg0>        </M:main>    </Soap-env:body></Soap-env:envelope>

View Code

As on the XML, my goal is to get the item under the node data. Format is: i201_00=fdac4fc422f5e339e04000

Here is the code

 PackageCn.code;ImportJava.io.File;ImportJava.util.Iterator;Importjava.util.List;Importorg.dom4j.Document;Importorg.dom4j.DocumentException;ImportOrg.dom4j.DocumentHelper;Importorg.dom4j.Element;ImportOrg.dom4j.Node;ImportOrg.dom4j.io.SAXReader; Public classDom4jparsexml { Public Static voidMain (string[] args) {Saxreader reader=NewSaxreader (); File File=NewFile ("In.xml"); Try{Document doc=reader.read (file); Element Root=doc.getrootelement (); String Nodepath= "/business/list/item";        System.out.println (Bar (root, Nodepath)); } Catch(documentexception e) {e.printstacktrace (); }    }    //Traverse Root until it's next node     Public Staticstring Bar (Element root, string nodepath)throwsdocumentexception {Iterator i=Root.elementiterator (); Element element=NULL;  while(I.hasnext ()) {element=(Element) i.next (); if(Element.elementiterator (). Hasnext ()) {returnBar (element, Nodepath); } Else {                returnBarnode (element, Nodepath); }        }        return NULL; }    //to traverse node under element     Public Staticstring Barnode (node node, string nodepath) {StringBuffer buf=NewStringBuffer (); Try{Document Document=Documenthelper.parsetext (Node.getstringvalue ()); List List1=document.selectnodes (Nodepath);  for(Object object:list1) {Element n=(Element) object; List i201_=n.elements ();  for(Object object2:i201_) {Node I_node=(Node) object2; Buf.append (I_node.getname ()+ "="                            +i_node.getstringvalue (). Trim ()); }            }        } Catch(Exception e) {System.out.println ("Node.getstringvalue () ParseText Exception"); }        returnbuf.tostring (); }}

View Code

The above is the complete code.

Note In the XML above, element arg0 the following data is passed through <! [cdata[.]] > Surrounded by, <! [cdata[.]] The text interpreter in > is not executed (it is ignored by the parser), so you can tell that arg0 is a node element, and <! [cdata[.]] The contents of > are just plain text. So in the bar This method uses the iteration, mainly to get the plain text.

Second, the structure of the plain text, the text is a document, so in Barnode this method, the first to parse the text into a document. Then call Document.selectnodes (""); method to get a set of node,  and then traverse. Document also has Document.selectsinglenode ("") method, this method is directly to get a node nodes.

Reference: http://dom4j.sourceforge.net/dom4j-1.6.1/guide.html