Dom node operations through XPath in dom4j

This article describes how to read from an XML file, operate the Dom, and output the Dom to a file to show how to operate DOM nodes through XPath in dom4j.

1. Read XML

Document originaltemplate1 = templateutil. getdocument ("com/test/XML/dom4j/templateopr/template1.xml ");
Document originaltemplate2 = templateutil. getdocument ("com/test/XML/dom4j/templateopr/template2.xml ");
Document originaltemplate3 = templateutil. getdocument ("com/test/XML/dom4j/templateopr/template3.xml ");
2. Operate nodes through XPath:

Templateutil. setnodevalue (originaltemplate2, "// M0: T2/M0: e2e/M0: e2edata", "e2e value ");
Templateutil. setnodevalue (originaltemplate2, "// M0: T2/M1: servicestate/M1: statecode", "code value ");

Templateutil. setnodevalue (originaltemplate3, "// M2: T3/m2: serviceaddressing/m2: messageid", "msg id ");
Templateutil. setnodevalue (originaltemplate3, "// M2: T3/m3: cloud/m3: mode", "Code ");

Element t2place = (element) originaltemplate1.selectsinglenode ("// M2: t2place ");
Node t2node = originaltemplate2.selectsinglenode ("// M0: t2 ");

// Add a node to another node as a subnode
T2place. Add (node) t2node. Clone ());

Node t3node = originaltemplate3.selectsinglenode ("// M2: T3 ");
Element t3place = (element) originaltemplate1.selectsinglenode ("// m3: t3place ");
T3place. Add (node) t3node. Clone ());

3. Output xml dom:

Templateutil. createfile (originaltemplate1, "d:/temp/test1.xml ");

Appendix: templateutil class used:

Public class templateutil {
Private Static hashmap <string, document> templatemap = new hashmap <string, document> ();

Private Static Map <string, string> getnamespace (){
Map <string, string> NS = new hashmap <string, string> ();

NS. Put ("M0", "http://www.test.com/m0 ");
NS. Put ("M1", "http://www.test.com/m1 ");
NS. Put ("m2", "http://www.test.com/m2 ");
NS. Put ("m3", "http://www.test.com/m3 ");

Return ns;
}

Public static document getdocument (string tempaltepath, Map <string, string> namespaces) throws extends entexception {
Document document = NULL;
If (templatemap. Get (tempaltepath )! = NULL ){
Document = (document) templatemap. Get (tempaltepath). Clone ();
} Else {
Synchronized (templatemap ){
Document = readrequestfiletemplete (tempaltepath, namespaces );
Templatemap. Put (tempaltepath, document );
Document = (document) document. Clone ();
}
}
Return document;
}

Public static document getdocument (string tempaltepath) throws extends entexception {
Document document = NULL;
If (templatemap. Get (tempaltepath )! = NULL ){
Document = (document) templatemap. Get (tempaltepath). Clone ();
} Else {
Synchronized (templatemap ){
Document = readrequestfiletemplete (tempaltepath, getnamespace ());
Templatemap. Put (tempaltepath, document );
Document = (document) document. Clone ();
}
}
Return document;
}

Private Static document readrequestfiletemplete (string file, Map <string, string> namespaceuris)
Throws into entexception {
Documentfactory = new documentfactory ();
Documentfactory. setxpathnamespaceuris (namespaceuris );
Saxreader reader = new saxreader ();
Reader. setdocumentfactory (documentfactory );

Inputstream isfile = thread. currentthread (). getcontextclassloader (). getresourceasstream (File );
Document Doc = reader. Read (isfile );
Return Doc;
}

Public static void setnodevalue (document node, string nodexpath, string nodevalue ){
Node E = node. selectsinglenode (nodexpath );
If (E! = NULL ){
E. settext (nodevalue = NULL? "": Nodevalue );
}
}

Public static file createfile (document sourcedoc, string sourcefilename) throws filenotfoundexception,
Unsupportedencodingexception, ioexception {

File finalfile = new file (sourcefilename );
Fileoutputstream out = new fileoutputstream (finalfile );
Xmlwriter writer = new xmlwriter (out );
Writer. Write (sourcedoc );
Return finalfile;
}
}

XML

Template1.xml

<Root xmlns: m0 = "http://www.test.com/m0"
Xmlns: M1 = "http://www.test.com/m1"
Xmlns: m2 = "http://www.test.com/m2"
Xmlns: M3 = "http://www.test.com/m3/">
<M0: Template>
<M2: t2place>
</M2: t2place>
<M3: t3place>
</M3: t3place>
</M0: Template>
</Root>

Template2.xml

<Template xmlns: m0 = "http://www.test.com/m0"
Xmlns: M1 = "http://www.test.com/m1/">
<M0: T2>
<M0: e2e>
<M0: e2edata>
E2e data
</M0: e2edata>
</M0: e2e>
<M1: servicestate>
<M1: statecode>
OK
</M1: statecode>
</M1: servicestate>
</M0: T2>
</Template>

 

Template3.xml

<Template xmlns: m2 = "http://www.test.com/m2"
Xmlns: M3 = "http://www.test.com/m3/">
<M2: T3>

<M2: serviceaddressing>
<M2: From>
Http://intra.test.com/
</M2: From>
<M2: To>
<M2: Address>
Http://ccm.intra.test.com
</M2: Address>
</M2: To>
<M2: replyto>
<M2: Address>
Http://intra.test.com/
</M2: Address>
</M2: replyto>
<M2: messageid>
8000588300000
</M2: messageid>
<M2: Action>
Http://ccm.intra.test.com
</M2: Action>
</M2: serviceaddressing>

<M3: cloud>
<M3: Mode>
All_or_nothing
</M3: Mode>
</M3: cloud>
</M2: T3>
</Template>