# javax.xml.bind

***

**1. Unmarshalling XML Data to Java Objects**

```java
// Create UnmarshalContext
JAXBContext jaxbContext = JAXBContext.newInstance(Customer.class);

// Create Unmarshaller
Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();

// Unmarshall XML file
File xmlFile = new File("customer.xml");
Customer customer = (Customer) unmarshaller.unmarshal(xmlFile);
```

**2. Marshalling Java Objects to XML Data**

```java
// Create MarshalContext
JAXBContext jaxbContext = JAXBContext.newInstance(Customer.class);

// Create Marshaller
Marshaller marshaller = jaxbContext.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);

// Marshal Java object to XML file
File xmlFile = new File("customer.xml");
marshaller.marshal(customer, xmlFile);
```

**3. Binding XML Schemas to Java Classes**

```java
// Create SchemaFactory
SchemaFactory schemaFactory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);

// Create Schema from XML schema file
Source schemaSource = new StreamSource(file);
Schema schema = schemaFactory.newSchema(schemaSource);

// Bind XML schema to annotated Java class
JAXBContext jaxbContext = JAXBContext.newInstance(Customer.class);
jaxbContext.setSchema(schema);
```

**4. Validating XML Data Using Schemas**

```java
// Create Validator
Validator validator = schema.newValidator();

// Load XML file
Source xmlSource = new StreamSource(file);

// Validate XML data against schema
Result result = validator.validate(xmlSource);
```

**5. Customizing XML Mapping with JAXB Annotations**

```java
// JAXB Annotations
@XmlRootElement
public class Customer {
    @XmlElement
    private String name;
    // Other annotations and methods...
}
```

**6. Using JAXBAdapters for Custom Data Types**

```java
// JAXB Adapter for LocalDate
public class LocalDateAdapter extends XmlAdapter<String, LocalDate> {
    @Override
    public LocalDate unmarshal(String value) { return LocalDate.parse(value); }
    @Override
    public String marshal(LocalDate value) { return value.toString(); }
}
```

**7. Handling Unknown XML Elements**

```java
// Customize unmarshaller to handle unknown elements
Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
unmarshaller.setEventHandler(new DefaultValidationEventHandler());
```

**8. Filtering XML Data with JAXB Filters**

```java
// Create filter
Filter filter = new JAXBElementFilter();

// Use filter during unmarshalling
Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
unmarshaller.setXMLFilter(filter);
```

**9. Marshalling XML Data to Strings**

```java
// Marshall object to String
Marshaller marshaller = jaxbContext.createMarshaller();
StringWriter writer = new StringWriter();
marshaller.marshal(customer, writer);
String xmlString = writer.toString();
```

**10. Unmarshalling XML Data from Strings**

```java
// Unmarshall XML string to object
Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
StringReader reader = new StringReader(xmlString);
Customer customer = (Customer) unmarshaller.unmarshal(reader);
```

**11. Handling Null Values in XML Data**

```java
// Customize marshaller to handle null values
Marshaller marshaller = jaxbContext.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_ENCODING, "UTF-8");
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
marshaller.setProperty(Marshaller.JAXB_NO_NAMESPACE_SCHEMA_LOCATION, "schema.xsd");
```

**12. Using JAXBProperties for Customization**

```java
// Create JAXBProperties object
JAXBProperties properties = new JAXBProperties(schemaSource);

// Customize unmarshaller
Unmarshaller unmarshaller = jaxbContext.createUnmarshaller(properties);
```

**13. Handling XML Namespaces**

```java
// Change default namespace of annotated Java class
@XmlRootElement(namespace = "http://example.com/customer")
public class Customer { // ... }
```

**14. Generating XML Data with Specific Encoding**

```java
// Customize marshaller to use specific encoding
Marshaller marshaller = jaxbContext.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_ENCODING, "UTF-8");
```

**15. Unmarshalling XML Data with Specific Locale**

```java
// Customize unmarshaller to use specific locale
Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
unmarshaller.setProperty(Unmarshaller.JAXB_LOCALE, Locale.FRENCH);
```

**16. Handling XML Attributes**

```java
// JAXB Annotations for XML attributes
@XmlElement(name = "name", attribute = true)
public class Customer { // ... }
```

**17. Customizing XML Element Order**

```java
// JAXB Annotations for XML element order
@XmlElement(nillable = true, required = true, order = 1)
public class Customer { // ... }
```

**18. Binding XML to Java Interfaces**

```java
// JAXB interface binding
@XmlRootElement
public interface Customer {
    String getName();
    void setName(String name);
}
```

**19. Using JAXB to Bind XML to POJOs (Plain Old Java Objects)**

```java
// JAXB annotations on POJO
@XmlRootElement
public class Customer {
    private String name;
    private Integer age;
    // ... }
```

**20. Mapping XML to Java Collections**

```java
// JAXB Annotations for XML collections
@XmlElementWrapper(name = "orders")
@XmlElement(name = "order")
public class Customer {
    private List<Order> orders;
    // ... }
```

**21. Marshalling XML Data with Indentation**

```java
// Customize marshaller to indent output
Marshaller marshaller = jaxbContext.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
```

**22. Unmarshalling XML Data with No Validation**

```java
// Customize unmarshaller to skip validation
Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
unmarshaller.setEventHandler(new SkipValidationEventHandler());
```

**23. Handling XML Annotations**

```java
// JAXB annotations on XML
@XmlAccessorType(XmlAccessType.FIELD)
public class Customer {
    @XmlElement(name = "name")
    private String name;
    // ... }
```

**24. Serializing XML Data to a File**

```java
// Serialize object to XML file
File outputFile = new File("output.xml");
try {
    marshaller.marshal(customer, outputFile);
} catch (JAXBException e) {
    e.printStackTrace();
}
```

**25. Deserializing XML Data from a File**

```java
// Deserialize XML file to object
File inputFile = new File("input.xml");
try {
    Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
    Customer customer = (Customer) unmarshaller.unmarshal(inputFile);
} catch (JAXBException e) {
    e.printStackTrace();
}
```

**26. JAXB Mapping for XML with Namespaces**

```java
// JAXB Annotation for XML namespace
@XmlRootElement(namespace = "http://www.example.com/customer")
public class Customer { // ... }
```

**27. JAXB Mapping for XML with Specific Prefix**

```java
// JAXB Annotation for XML element with specific prefix
@XmlElement(namespace = "http://www.example.com/customer", name = "name")
public class Customer { // ... }
```

**28. JAXB Mapping for XML with Optional Elements**

```java
// JAXB Annotation for optional XML element
@XmlElement(required = false)
public class Customer { // ... }
```

**29. JAXB Mapping for XML with Default Values**

```java
// JAXB Annotation for XML element with default value
@XmlElement(defaultValue = "John Doe")
public class Customer { // ... }
```

**30. JAXB Mapping for XML with Choice Elements**

```java
// JAXB Annotation for XML element with choice
@XmlElement(choice = { @XmlElement(name = "name"), @XmlElement(name = "email") })
public class Customer { // ... }
```

**31. JAXB Mapping for XML with Inline Elements**

```java
// JAXB Annotation for XML inline element
@XmlInlineBinaryData
public class Customer { // ... }
```

**32. JAXB Binding for XML with Mix Annotations**

```java
// JAXB Annotation for XML element with mixed content
@XmlElementWrapper(name = "items")
@XmlElement(name = "item")
@XmlMixed
public class Customer { // ... }
```

**33. JAXB Mapping for XML with Adaptations**

```java
// JAXB Adapter class for custom type adaptation
public class MyDateAdapter extends XmlAdapter<String, Date> { // ... }
```

**34. JAXB Binding for XML with Object Factory**

```java
// JAXB ObjectFactory class for creating XML objects
public class CustomerFactory { // ... }
```

**35. JAXB Mapping for XML with Wrappers**

```java
// JAXB Wrapper class for XML root element
@XmlRootElement(name = "Customers")
public class CustomerList { // ... }
```

**36. JAXB Customization for XML with NamespacePrefixMapper**

```java
// JAXB NamespacePrefixMapper class for customizing XML namespace prefixes
public class MyNamespacePrefixMapper extends NamespacePrefixMapper { // ... }
```

**37. JAXB Customization for XML with SchemaLocation**

```java
// JAXB SchemaLocation class for specifying XML schema location
public class MySchemaLocation extends SchemaLocation { // ... }
```

**38. JAXB Customization for XML with ValidationEventHandlers**

```java
// JAXB ValidationEventHandler class for handling XML validation events
public class MyValidationEventHandler extends ValidationEventHandler { // ... }
```

**39. JAXB Customization for XML with MarshallerProperties**

```java
// JAXB MarshallerProperties class for customizing XML marshaling properties
public class MyMarshallerProperties extends MarshallerProperties { // ... }
```

**40. JAXB Customization for XML with UnmarshallerProperties**

```java
// JAXB UnmarshallerProperties class for customizing XML unmarshaling properties
public class MyUnmarshallerProperties extends UnmarshallerProperties { // ... }
```

**41. JAXB Customization for XML with MOXy (EclipseLink)**

```java
// JAXBContextFactory for using MOXy with JAXB
JAXBContextFactory factory = EclipseLinkMOXy.JAXBContextFactory.getInstance();
// ... (use factory to create JAXBContext and customize as needed)
```

**42. JAXB Customization for XML with XJC (JAXB Compiler)**

```java
// XJC command for generating Java classes from XML schema with customizations
xjc -d outputDirectory -encoding UTF-8 -target 2.0 -p com.example schema.xsd
```

**43. JAXB Binding for XML with Validation Mode**

```java
// Customize JAXBContext with validation mode
JAXBContext jaxbContext = JAXBContext.newInstance(Customer.class, new MyValidationEventHandler(), SchemaValidation.RELAXED);
```

**44. JAXB Binding for XML with Schema Generation**

```java
// Generate XSD schema from Java classes
SchemaOutputResolver outputResolver = new MySchemaOutputResolver();
XJC xjc = JAXBContext.newInstance(Customer.class).createJAXBContext(outputResolver);
xjc.generateSchema(outputResolver.createOutput());
```

**45. JAXB Binding for XML with Binding Source**

```java
// Create JAXBContext from XML Binding Source
JAXBContext jaxbContext = JAXBContext.newInstance(new XMLBindingSource(customer));
```

**46. JAXB Binding for XML with XML Schema Binding**

```java
// Bind XML schema to Java classes with XML Schema Binding
JAXBContext jaxbContext = JAXBContext.newInstance(Customer.class, Customer.class.getResource(schema).toString());
```

**47. JAXB Customization for XML with Optimized Marshalling**

```java
// Initialize JAXB Marshaller for optimized performance
Marshaller marshaller = jaxbContext.createMarshaller();
marshaller.setEventHandler(new Marshaller.EventHandler() { // ... });
marshaller.setProperty(Marshaller.JAXB_FRAGMENT, true);
marshaller.setProperty(Marshaller.JAXB_ENCODING, "UTF-8");
```

**48. JAXB Customization for XML with Optimized Unmarshalling**

```java
// Initialize JAXB Unmarshaller for optimized performance
Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
unmarshaller.setEventHandler(new Unmarshaller.EventHandler() { // ... });
unmarshaller.setProperty(Unmarshaller.JAXB_FRAGMENT, true);
unmarshaller.setProperty(Unmarshaller.JAXB_ENCODING, "UTF-8");
```

**49. JAXB Customization for XML with Security Features**

```java
// Initialize JAXBContext with security manager
SecurityManager securityManager = new MySecurityManager();
JAXBContext jaxbContext = JAXBContext.newInstance(Customer.class, null, securityManager);
```

**50. JAXB Binding for XML with CXF (Apache CXF)**

```java
// Use CXF to create SOAP message with JAXB-bound data
SOAPMessage message = SOAPFactory.newInstance().createMessage();
message.getSOAPBody().addBodyElement(jaxbContext.createMarshaller().marshal(customer));
```