Complete Guide: Use the Jackson DataFormat XML framework in the Java library for XML conversion
Complete Guide: Use the Jackson DataFormat XML framework in the Java library for XML conversion
Overview:
XML (scalable mark language) is a tag language for storing and transmission data.In Java programming, we often need to convert the Java object to XML format and save it to the file or transmit it through the network.Jackson DataFormat XML is a popular Java class library that is used to process the serialization and derivativeization of XML data.
Step 1: Add dependencies
First, we need to add Jackson DataFormat XML to our Java project.In the Maven project, you can add the following dependencies to the pom.xml file:
<dependency>
<groupId>com.fasterxml.jackson.dataformat</groupId>
<artifactId>jackson-dataformat-xml</artifactId>
<version>2.12.4</version>
</dependency>
Step 2: Create a java class
Next, we need to create a Java class that will be converted to XML.In this example, we will create a simple Java class called "Person" to represent a person's information:
public class Person {
private String name;
private int age;
// omit the creation function and other methods
// Add Getter and Setter method
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}
Step 3: Use Jackson for serialization and derivativeization
Now, we can use Jackson DataFormat XML to execute the conversion between Java objects and XML.The following is a simple example. Demonstration of how to convert the Java object into XML format and save it into the file:
import com.fasterxml.jackson.dataformat.xml.XmlMapper;
import java.io.File;
import java.io.IOException;
public class XmlConversionExample {
public static void main(String[] args) {
// Create a Person object
Person person = new Person();
Person.setname ("Zhang San");
person.setAge(25);
// Create XMLMAPPER objects
XmlMapper xmlMapper = new XmlMapper();
try {
// Convert java objects to XML string
String xml = xmlMapper.writeValueAsString(person);
System.out.println(xml);
// Convert the Java object to XML file
xmlMapper.writeValue(new File("person.xml"), person);
// Convert XML string back to Java object
Person parsedPerson = xmlMapper.readValue(xml, Person.class);
System.out.println(parsedPerson.getName());
System.out.println(parsedPerson.getAge());
// Convert XML files back to Java object
Person parsedPersonFromFile = xmlMapper.readValue(new File("person.xml"), Person.class);
System.out.println(parsedPersonFromFile.getName());
System.out.println(parsedPersonFromFile.getAge());
} catch (IOException e) {
e.printStackTrace();
}
}
}
In the above example code, we first create a Person object, and then use XMLMAPPER to convert it to XML string and print output.Next, we save the Person object into the XML file named "Person.xml".
We then use XMLMAPPER to resolve the XML string back to the Person object and print the attribute value of the object after the output analysis.Finally, we read the Person object from the XML file and print out its attribute value again.
Note: In the above example code, we print the XML data directly and output to the console.In practical applications, you can save XML data to files or transmit them through the network according to requirements.
Configuration instructions:
Jackson DataFormat XML can be customized by multiple configurations.For more complicated XML conversion requirements, you can use annotations (such as@xmlrootElement,@xmlelement) to define the mapping relationship between the attributes of Java and XML elements.You can find more configuration options and examples in the official document: https://github.com/fasterxml/jackson-dataFormat-XML
in conclusion:
In this article, we introduced how to use the Jackson DataFormat XML framework in the Java class library for XML conversion.By adding the dependencies according to the above steps, creating the Java class, and using Jackson for serialization and derivativeization, you can convert the Java object to XML format and reverse it.I hope that this guide can help you successfully process and convey XML data.
