# javax.xml

***

**1. XML Parsing with DOM**

```java
DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document doc = builder.parse("file.xml");
```

**2. XML Parsing with SAX**

```java
SAXParserFactory factory = SAXParserFactory.newInstance();
SAXParser parser = factory.newSAXParser();
MySAXHandler handler = new MySAXHandler();
parser.parse("file.xml", handler);
```

**3. XML Parsing with StAX**

```java
XMLStreamReader reader = XMLInputFactory.newInstance().createXMLStreamReader("file.xml");
while (reader.hasNext()) {
    int eventType = reader.next();
    // Process event types
}
```

**4. XML Serialization with DOM**

```java
DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document doc = builder.newDocument();
// Create XML structure
Transformer transformer = TransformerFactory.newInstance().newTransformer();
transformer.transform(new DOMSource(doc), new StreamResult("file.xml"));
```

**5. XML Serialization with StAX**

```java
XMLOutputFactory factory = XMLOutputFactory.newInstance();
XMLStreamWriter writer = factory.createXMLStreamWriter(new FileOutputStream("file.xml"));
writer.writeStartDocument();
// Write XML content
writer.writeEndDocument();
writer.close();
```

**6. XML Validation**

```java
SchemaFactory schemaFactory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
Schema schema = schemaFactory.newSchema(new File("schema.xsd"));
Validator validator = schema.newValidator();
validator.validate(new File("file.xml"));
```

**7. XPath Evaluation**

```java
XPathFactory factory = XPathFactory.newInstance();
XPath xpath = factory.newXPath();
XPathExpression expr = xpath.compile("//element[@attribute='value']");
Object result = expr.evaluate(doc, XPathConstants.NODESET);
```

**8. XSLT Transformation**

```java
TransformerFactory transformerFactory = TransformerFactory.newInstance();
Templates templates = transformerFactory.newTemplates(new StreamSource("stylesheet.xsl"));
Transformer transformer = templates.newTransformer();
transformer.transform(new DOMSource(doc), new StreamResult("transformed.xml"));
```

**9. XML Signature**

```java
XMLSignatureFactory factory = XMLSignatureFactory.getInstance("DOM");
XMLSignature signature = factory.newXMLSignature();
// Setup signature elements and sign document
signature.sign(doc);
```

**10. XML Encryption**

```java
XMLEncryptionFactory factory = XMLEncryptionFactory.getInstance("DOM");
XMLEncryption encryption = factory.newXMLEncryption();
EncryptedData encryptedData = encryption.encrypt(documentElement);
// Add encrypted data to document
```

**11. SOAP Message Processing**

```java
SOAPMessage message = SOAPFactory.newInstance().createMessage();
// Set SOAP body and headers
message.saveChanges();
```

**12. SOAP Web Service Client**

```java
Service service = ServiceFactory.newInstance().createService(new URL("wsdl"), new QName("namespace", "serviceName"));
Port port = service.getPort(Port.class);
// Invoke SOAP operation
```

**13. SOAP Web Service Server**

```java
Endpoint endpoint = Endpoint.publish("endpointUrl", new MyWebService());
```

**14. XML Schema Generation**

```java
SchemaFactory factory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
Schema schema = factory.newSchema();
// Add complex types and elements to schema
```

**15. XML Schema Validation**

```java
SchemaFactory factory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
Schema schema = factory.newSchema(new File("schema.xsd"));
Validator validator = schema.newValidator();
// Validate XML document against schema
```

**16. JAXB Binding**

```java
JAXBContext jaxbContext = JAXBContext.newInstance(MyClass.class);
Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
MyClass myClass = (MyClass) unmarshaller.unmarshal(new File("file.xml"));
```

**17. JAXB Marshalling**

```java
JAXBContext jaxbContext = JAXBContext.newInstance(MyClass.class);
Marshaller marshaller = jaxbContext.createMarshaller();
marshaller.marshal(myClass, new File("file.xml"));
```

**18. JAXP Transformer Factory**

```java
TransformerFactory factory = TransformerFactory.newInstance();
Transformer transformer = factory.newTransformer(new StreamSource("stylesheet.xsl"));
// Transform XML document
```

**19. JAXP XPath Factory**

```java
XPathFactory factory = XPathFactory.newInstance();
XPath xpath = factory.newXPath();
// Evaluate XPath expressions on XML document
```

**20. JAXP Validator**

```java
SchemaFactory factory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
Schema schema = factory.newSchema(new File("schema.xsd"));
Validator validator = schema.newValidator();
// Validate XML document against schema
```

**21. JAXP Document Builder Factory**

```java
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
// Parse XML document and create DOM tree
```

**22. JAXP SAX Parser Factory**

```java
SAXParserFactory factory = SAXParserFactory.newInstance();
SAXParser parser = factory.newSAXParser();
// Parse XML document using SAX parser
```

**23. JAXP Document Object Model (DOM)**

```java
DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document doc = builder.parse("file.xml");
// Access and manipulate DOM elements
```

**24. JAXP Simple API for XML (SAX)**

```java
SAXParserFactory factory = SAXParserFactory.newInstance();
SAXParser parser = factory.newSAXParser();
MySAXHandler handler = new MySAXHandler();
parser.parse("file.xml", handler);
```

**25. JAXP Streaming API for XML (StAX)**

```java
XMLStreamReader reader = XMLInputFactory.newInstance().createXMLStreamReader("file.xml");
// Iterate over XML events
```

**26. XML Bridge API**

```java
XMLBridge bridge = XMLBridge.get();
bridge.unmarshal(source, target);
// Convert XML to Java object or vice versa
```

**27. DOM4J Library**

```java
Document doc = DocumentHelper.createDocument();
Element root = doc.addElement("root");
// Create and manipulate XML elements using DOM4J
```