BAEL-2338

xml/README.md

@@ -4,3 +4,4 @@
 - [XML Libraries Support in Java](http://www.baeldung.com/java-xml-libraries)
 - [DOM parsing with Xerces](http://www.baeldung.com/java-xerces-dom-parsing)
 - [Write an org.w3.dom.Document to a File](https://www.baeldung.com/java-write-xml-document-file)
+- [Convert XML to HTML](https://www.baeldung.com/convert-xml-to-html-in-java)

xml/pom.xml

@@ -30,6 +30,22 @@
             <version>${jdom2.version}</version>
         </dependency>
 
+        <dependency>
+            <groupId>javax.xml</groupId>
+            <artifactId>jaxb-api</artifactId>
+            <version>2.1</version>
+        </dependency>
+        <dependency>
+            <groupId>javax.xml</groupId>
+            <artifactId>jaxp-api</artifactId>
+            <version>1.4.2</version>
+        </dependency>
+        <dependency>
+            <groupId>javax.xml.stream</groupId>
+            <artifactId>stax-api</artifactId>
+            <version>1.0-2</version>
+        </dependency>
+
         <!-- utils -->
         <dependency>
             <groupId>commons-io</groupId>

xml/src/main/java/com/baeldung/xmlhtml/Application.java

@@ -0,0 +1,16 @@
+package com.baeldung.xmlhtml;
+
+import com.baeldung.xmlhtml.helpers.XMLRunner;
+
+/*
+ * @author Adam In Tae Gerard
+ *
+ * Main method.
+ */
+
+public class Application {
+
+    public static void main(String[] args) {
+        XMLRunner.doWork();
+    }
+}

xml/src/main/java/com/baeldung/xmlhtml/Constants.java

@@ -0,0 +1,46 @@
+package com.baeldung.xmlhtml;
+
+/*
+ * @Author Adam InTae Gerard
+ */
+
+public class Constants {
+
+    /**
+     * File-related constants.
+     */
+
+    public static final String XML_FILE_IN = "src/main/resources/xml/in.xml";
+    public static final String JAXB_FILE_OUT = "src/main/resources/xml/jaxb.html";
+    public static final String JAXP_FILE_OUT = "src/main/resources/xml/jaxp.html";
+    public static final String STAX_FILE_OUT = "src/main/resources/xml/stax.html";
+
+    /**
+     * Generic exceptions  constants.
+     */
+
+    public static final String EXCEPTION_ENCOUNTERED = "Oops! You done's broke'd it! Error: ";
+
+    /**
+     * Generic logging constants.
+     */
+
+    public static final String LINE_BREAK = System.getProperty("line.separator");
+    public static final String WHITE_SPACE = " ";
+
+    /**
+     * SAX Parser console constants.
+     */
+
+    public static final String DOCUMENT_START = "Document parsing has begun!";
+    public static final String DOCUMENT_END = "Document parsing has ended!";
+    public static final String ELEMENT_START = "Element parsing has begun!";
+    public static final String ELEMENT_END = "Element parsing has ended!";
+
+    /**
+     * STAX prefixes.
+     */
+
+    public static final String BREAK = "\n";
+    public static final String TAB = "\t";
+}

xml/src/main/java/com/baeldung/xmlhtml/helpers/XMLRunner.java

@@ -0,0 +1,27 @@
+package com.baeldung.xmlhtml.helpers;
+
+
+import com.baeldung.xmlhtml.helpers.jaxb.JAXBHelper;
+import com.baeldung.xmlhtml.helpers.jaxp.JAXPHelper;
+import com.baeldung.xmlhtml.helpers.stax.STAXHelper;
+
+/**
+ * @author Adam In Tae Gerard
+ *
+ * Core executable code in here.
+ */
+
+public class XMLRunner {
+
+	public static void doWork() {
+
+		JAXBHelper.example();
+
+		JAXPHelper.saxParser();
+		JAXPHelper.documentBuilder();
+
+        STAXHelper.write(STAXHelper.read());
+
+	}
+
+}

xml/src/main/java/com/baeldung/xmlhtml/helpers/jaxb/JAXBHelper.java

@@ -0,0 +1,107 @@
+package com.baeldung.xmlhtml.helpers.jaxb;
+
+import com.baeldung.xmlhtml.pojo.jaxb.html.ExampleHTML;
+import com.baeldung.xmlhtml.pojo.jaxb.html.elements.Body;
+import com.baeldung.xmlhtml.pojo.jaxb.html.elements.CustomElement;
+import com.baeldung.xmlhtml.pojo.jaxb.html.elements.Meta;
+import com.baeldung.xmlhtml.pojo.jaxb.html.elements.NestedElement;
+import com.baeldung.xmlhtml.pojo.jaxb.xml.XMLExample;
+
+import javax.xml.bind.JAXBContext;
+import javax.xml.bind.Marshaller;
+import javax.xml.bind.Unmarshaller;
+
+import java.io.File;
+
+import static com.baeldung.xmlhtml.Constants.*;
+
+/**
+ * @author Adam In Tae Gerard
+ * <p>
+ * All JAXB logic in here :)
+ */
+
+public class JAXBHelper {
+
+    private static void print(String xmlContent) {
+        System.out.println(xmlContent);
+    }
+
+    private static Unmarshaller getContextUnmarshaller(Class clazz) {
+        Unmarshaller unmarshaller = null;
+
+        try {
+            JAXBContext context = JAXBContext.newInstance(clazz);
+            unmarshaller = context.createUnmarshaller();
+        } catch (Exception ex) {
+            System.out.println(EXCEPTION_ENCOUNTERED + ex);
+        }
+
+        return unmarshaller;
+    }
+
+    private static Marshaller getContextMarshaller(Class clazz) {
+        Marshaller marshaller = null;
+
+        try {
+            JAXBContext context = JAXBContext.newInstance(clazz);
+            marshaller = context.createMarshaller();
+            marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
+            //https://stackoverflow.com/questions/277996/remove-standalone-yes-from-generated-xml
+            marshaller.setProperty("jaxb.fragment", Boolean.TRUE);
+        } catch (Exception ex) {
+            System.out.println(EXCEPTION_ENCOUNTERED + ex);
+        }
+
+        return marshaller;
+    }
+
+    public static void example() {
+
+        try {
+
+            /**
+             *   Cast to desired POJO.
+             */
+
+            XMLExample xml = (XMLExample) JAXBHelper.getContextUnmarshaller(XMLExample.class).unmarshal(new File(XML_FILE_IN));
+            JAXBHelper.print(xml.toString());
+            //JAXBHelper.print(xml.getAncestor().getDescendantOne().getValue());
+            //JAXBHelper.print(xml.getAncestor().getDescendantTwo().getDescendantThree().getValue());
+
+            /**
+             * Transfer exchanged to writeable POJO.
+             */
+
+            ExampleHTML html = new ExampleHTML();
+
+            Body body = new Body();
+            CustomElement customElement = new CustomElement();
+            NestedElement nested = new NestedElement();
+            CustomElement child = new CustomElement();
+
+            customElement.setValue("descendantOne: " + xml.getAncestor().getDescendantOne().getValue());
+            child.setValue("descendantThree: " + xml.getAncestor().getDescendantTwo().getDescendantThree().getValue());
+            nested.setCustomElement(child);
+
+            body.setCustomElement(customElement);
+            body.setNestedElement(nested);
+
+            Meta meta = new Meta();
+            meta.setTitle("example");
+            html.getHead().add(meta);
+            html.setBody(body);
+
+            /**
+             * Marshall into XML (HTML).
+             */
+
+            JAXBHelper.getContextMarshaller(ExampleHTML.class).marshal(html, new File(JAXB_FILE_OUT));
+
+        } catch (Exception ex) {
+            System.out.println(EXCEPTION_ENCOUNTERED + ex);
+        }
+
+    }
+
+}

xml/src/main/java/com/baeldung/xmlhtml/helpers/jaxp/CustomHandler.java

@@ -0,0 +1,61 @@
+package com.baeldung.xmlhtml.helpers.jaxp;
+
+import org.xml.sax.ContentHandler;
+import org.xml.sax.Locator;
+
+import static com.baeldung.xmlhtml.Constants.*;
+
+public class CustomHandler implements ContentHandler {
+
+     /**
+     * Start document event.
+     */
+
+    public void startDocument() {
+        //System.out.println(DOCUMENT_START);
+    }
+
+
+    /**
+     * New element event.
+     */
+
+    public void startElement(String uri, String localName, String qName, org.xml.sax.Attributes atts) {
+        //System.out.println(ELEMENT_START);
+    }
+
+    /**
+     * End document event.
+     */
+
+    public void endDocument() {
+        System.out.println(DOCUMENT_END);
+    }
+
+    /**
+     * End element event.
+     */
+
+    public void endElement(String uri, String localName, String qName) {
+        //System.out.println(ELEMENT_END);
+    }
+
+    /**
+     * Other methods.
+     */
+
+    public void startPrefixMapping(String prefix, String uri) { }
+
+    public void endPrefixMapping(String prefix) { }
+
+    public void setDocumentLocator(Locator locator) { }
+
+    public void characters(char[] ch, int start, int length) {  }
+
+    public void ignorableWhitespace(char[] ch, int start, int length) {  }
+
+    public void processingInstruction(String target, String data) {  }
+
+    public void skippedEntity(String name) { }
+
+}