Jackson DataFormat XML framework in the technical principle of technical principles in the Java class library

The Jackson DataFormat XML framework is a technology used in the Java library to process XML data format.This article will explore its technical principles and provide the necessary Java code examples. ### What is Jackson DataFormat XML framework? Jackson DataFormat XML is an extension of the Jackson library, which aims to provide support for XML format data.It allows Java developers to sequence the Java object to XML format, and can turn the XML documentation to the Java object.The Jackson DataFormat XML framework implements a conversion between XML and Java objects by using the annotations in the XML parser and the Jackson library. ### Technical principle Java provides many methods for processing XML, such as DOM parsing, SAX analysis, and STAX parsing.The Jackson DataFormat XML framework uses a processing mode called "streaming", which means that it processs XML data in the form of streaming.This makes processing large XML files efficient. Jackson DataFormat XML framework realizes the conversion between XML and Java objects through the following steps: 1. Add dependencies: First, you need to add the dependency item of the Jackson DataFormat XML framework to the project.This step can be completed by adding the following dependencies to the construction management document of the project: <dependency> <groupId>com.fasterxml.jackson.dataformat</groupId> <artifactId>jackson-dataformat-xml</artifactId> <Version> Version Number </version> </dependency> 2. Create a Java class: Define the Java class that requires XML data.You can use the annotation of the Jackson library to customize the serialization and dependency of the Java class. public class Person { @JacksonXmlProperty(localName = "name") private String name; @JacksonXmlProperty(localName = "age") private int age; // omit the getter and setter method } 3. Serialization: Serialize the Java object to data in XML format. XmlMapper xmlMapper = new XmlMapper(); Person person = new Person(); Person.setname ("Zhang San"); person.setAge(25); String xml = xmlMapper.writeValueAsString(person); System.out.println(xml); The output result will be the following xml format string: <Person> <name> Zhang San </name> <age>25</age> </Person> 4. Revitalize: The XML data is serialized into a Java object. String xml = "<Person><name>张三</name><age>25</age></Person>"; Person person = xmlMapper.readValue(xml, Person.class); System.out.println(person.getName()); System.out.println(person.getAge()); The output result will be: Zhang San 25 By using the Jackson DataFormat XML framework, we can easily process XML data formats in Java applications to achieve conversion between XML and Java objects. Summarize: The Jackson DataFormat XML framework is a Java class library for processing XML format data.It uses an annotation of XML parser and the annotations in the Jackson library to achieve conversion between XML and Java objects.This framework achieves efficient processing through streaming XML data, and provides simple and intuitive APIs, making it easier to process XML data in Java applications.