DOM Parsing XML generalization

General parsing

XML File

<?xml version= ' 1.0 ' encoding= ' UTF-8 ' standalone= ' yes '?>
<logs>
	<mail>
		<username >san.zhang</username>
		<password>888888</password>
	</mail>
	<log>
		<project name= "First selection box option:" >project123</project>
		<category name= "The Second selection box option:" >category123 </category>
		<subcategory name= "Third selection box option: >subcategory123</subcategory>
		<time name=" Working time: ">10</time>
		<content name=" Work content: ">content123</content>
	</log>
	<log>
		<project name= "First selection box option: >project111</project>
		<category name=" Second selection box option: " >category111</category>
		<subcategory name= "Third selection box option:" >subcategory111</subcategory>
		<time name= "Working time:" >10</time>
		<content name= "Work content:" >content111</content>
	</log>
</logs>

Parsing Programs

/** * Document tree Parsing XML file * * @throws parserconfigurationexception * @throws ioexception * @throws saxexception * * public void test_001 () throws Parserconfigurationexception, Saxexception, IOException {documentbuilderfactory factor
		y = documentbuilderfactory.newinstance ();
		Documentbuilder builder = Factory.newdocumentbuilder ();
		File XML = new file (System.getproperty ("User.dir") + File.separator + "Log.xml");
		Create Document Object Document DOC = Builder.parse (XML);
		Get root node Element root = Doc.getdocumentelement ();
		SYSTEM.OUT.PRINTLN ("Root node Name:" + root.getnodename ());
		System.out.println ("BaseUri:" + Root.getbaseuri ());
		System.out.println ("LocalName:" + root.getlocalname ());
		System.out.println ("NamespaceURI:" + Root.getnamespaceuri ());
		System.out.println ("NodeType:" + root.getnodetype ());
		System.out.println ("TagName:" + root.gettagname ());
		System.out.println ("SchemaType:" + root.getschematypeinfo ()); System.out.println ("Textcontent: "+ root.gettextcontent ());
		Children nodes of root node nodelist nodes = Root.getchildnodes ();
		Children nodes Size System.out.println ("Children nodes Size:" + nodes.getlength ());
			for (int i = 0; i < nodes.getlength (); i++) {Node node = Nodes.item (i);
			System.out.println ("Item:" + node); if (!) (
			Node instanceof Element)) continue;
			element element = (element) node;
			System.out.println ("element:" + element.gettagname ()); for (Node child = Element.getfirstchild (), child!= null, child = child. Getnextsibling ()) {if (!) (
				Child instanceof Element)) continue;
				System.out.println (Child.getnodename () + ":" + child.getfirstchild (). Gettextcontent ());
			System.out.println (Child.getnodename () + ":" + child.getfirstchild (). Getnodevalue ()); }
		}
	}

DTD Validation parsing

XML File

<?xml version= ' 1.0 ' encoding= ' UTF-8 ' standalone= ' yes '?>
<! DOCTYPE logs SYSTEM "CONFIG.DTD" >
<logs>
	<mail>
		<username>san.zhang</username >
		<password>888888</password>
	</mail>
	<log>
		<project name= " First selection box option: ">project123</project>
		<category name=" The Second selection box option: ">category123</category>
		<subcategory name= "Third selection box option:" >subcategory123</subcategory>
		<time name= "Working time:" >10 </time>
		<content name= "Work content:" >content123</content>
	</log>
</logs>

Which joined the <! DOCTYPE logs SYSTEM "CONFIG.DTD" >

CONFIG.DTD

<?xml version= "1.0" encoding= "UTF-8"?> <!
ELEMENT logs (Mail,log) >
<! ELEMENT Mail (Useraname,password) >
<! ELEMENT log (project,category,subcategory,time,content) >
<! ELEMENT username (#PCDATA) >
<! ELEMENT password (#PCDATA) >
<! ELEMENT Project (#PCDATA) >
<! ELEMENT category (#PCDATA) >
<! ELEMENT subcategory (#PCDATA) >
<! ELEMENT time (#PCDATA) >
<! ELEMENT content (#PCDATA) >

Parsing Programs

/** * Document tree with DTD validation parse XML file * @throws parserconfigurationexception * @throws ioexception * @throws saxexception * *  public void test_002 () throws Parserconfigurationexception, Saxexception, IOException {documentbuilderfactory factory
		= Documentbuilderfactory.newinstance ();
		Open Validate feature factory.setvalidating (true);
		Ignore whitespace factory.setignoringelementcontentwhitespace (true);
		Documentbuilder builder = Factory.newdocumentbuilder ();
		Builder.seterrorhandler (New MyErrorHandler ());
		File XML = new file (System.getproperty ("User.dir") + File.separator + "Log_dtd.xml");
		Create Document Object Document DOC = Builder.parse (XML);
		Get root node Element root = Doc.getdocumentelement ();
		
		NodeList nodes = Root.getchildnodes ();
		Element mail = (element) nodes.item (0);
		Element log = (element) Nodes.item (1);
		System.out.println (Mail.getnodename ());
		System.out.println (Log.getnodename ()); System.out.println ("content:" + log.getchildNodes (). Item (4). Gettextcontent ()); }

Schema parsing xml

XML File

<?xml version= ' 1.0 ' encoding= ' UTF-8 ' standalone= ' yes '?> <logs ' xmlns:xsi=
Xmlschema-instance "
    xsi:nonamespaceschemalocation=" config.xsd ">
	<mail>
		<username> san.zhang</username>
		<password>888888</password>
	</mail>
	<log>
		<project name= "First selection box option:" >project123</project>
		<category name= "Second selection box option:" >category123< /category>
		<subcategory Name= "The Third selection box option:" >subcategory123</subcategory>
		<time name= " Working time: ">10</time>
		<content name=" Work content: ">content123</content>
	</log>
</logs>

schema file

<?xml version= "1.0" encoding= "UTF-8"?> <xsd:element name= "Useraname"
, type= "xsd:string" >
< Xsd:element name= "Password", type= "xsd:string" >
<xsd:element name= "project", type= "xsd:string" >
<xsd:element name= "category", type= "xsd:string" > <xsd:element name= "subcategory"
, type= "xsd:string" >
<xsd:element name= "Time", type= "Xsd:int" >
<xsd:element name= "content", type= "xsd:string" >

Parsing Programs

/** * Document tree Parsing XML with schema validation * @throws parserconfigurationexception * @throws IOException * @throws saxexception */public void test_003 () throws Parserconfigurationexception, Saxexception, ioexception{documentbuilderfactory
		y = documentbuilderfactory.newinstance ();
		Factory.setnamespaceaware (TRUE);
		Final String jaxp_schema_language = "Http://java.sun.com/xml/jaxp/properties/schemaLanguage";
		Final String W3c_xml_schema = "Http://www.w3.org/2001/XMLSchema";
		Factory.setattribute (Jaxp_schema_language, W3c_xml_schema);
		Documentbuilder builder = Factory.newdocumentbuilder ();
		Builder.seterrorhandler (New MyErrorHandler ());
		File XML = new file (System.getproperty ("User.dir") + File.separator + "Log_schema.xml");
		Create Document Object Document DOC = Builder.parse (XML);
		Get root node Element root = Doc.getdocumentelement ();
		NodeList nodes = Root.getchildnodes ();
		Element log = (element) Nodes.item (1);
		System.out.println (Log.getnodename ());System.out.println ("content:" + log.getchildnodes (). Item (4). Gettextcontent ()); }

XPath

XML file

<?xml version= ' 1.0 ' encoding= ' UTF-8 ' standalone= ' yes '?>
<logs>
	<mail>
		<username >san.zhang</username>
		<password>888888</password>
	</mail>
	<log>
		<project name= "First selection box option:" >project123</project>
		<category name= "The Second selection box option:" >category123 </category>
		<subcategory name= "Third selection box option: >subcategory123</subcategory>
		<time name=" Working time: ">10</time>
		<content name=" Work content: ">content123</content>
	</log>
	<log>
		<project name= "First selection box option: >project111</project>
		<category name=" Second selection box option: " >category111</category>
		<subcategory name= "Third selection box option:" >subcategory111</subcategory>
		<time name= "Working time:" >10</time>
		<content name= "Work content:" >content111</content>
	</log>
</logs>

Parsing Programs

/** * XPath reads XML * @throws parserconfigurationexception * @throws ioexception * @throws saxexception * @throw S xpathexpressionexception */public void test_004 () throws Parserconfigurationexception, Saxexception, IOException, X
		pathexpressionexception{xpathfactory xfactory = Xpathfactory.newinstance ();
		Documentbuilderfactory factory = Documentbuilderfactory.newinstance ();
		Documentbuilder builder = Factory.newdocumentbuilder ();
		File XML = new file (System.getproperty ("User.dir") + File.separator + "Log.xml");
		Create Document Object XPath Path = Xfactory.newxpath ();
		Document doc = Builder.parse (XML);
		String username = path.evaluate ("/logs/mail/username", Doc);
		SYSTEM.OUT.PRINTLN (username);
		NodeList nodes = (nodelist) path.evaluate ("/logs/log", Doc,xpathconstants.nodeset);
		System.out.println (Nodes.item (1). Getfirstchild (). Getnodename ());
		Node node = (node) path.evaluate ("logs/log[1]", Doc, Xpathconstants.node); System.out.println (node.getfirsTchild (). Getnodename ());
		int count = ((number) path.evaluate ("/logs/log/time", Doc, Xpathconstants.number)). Intvalue ();
	System.out.println (count); }