How to integrate Jackson Module Jakarta XMLBIND Annotations in the Java library
In the Java class library, Jackson Module Jakarta XMLBIND Annitations is used?
Jackson is a very popular Java class library that is used to serialize the Java object to JSON. However, sometimes we also need to sequence the Java object to XML.In this case, we can use Jackson Module Jakarta XMLBIND Annitations to process XML serialization and counter -serialization.This article will introduce how to integrate Jackson Module Jakarta XMLBind Annitations in the Java class library.
1. Introduce dependencies
To use Jackson Module Jakarta Xmlbind Annotations, we must first introduce corresponding dependencies in the configuration file of the project.In the Maven project, the following dependencies can be added to the POM.XML file:
<dependencies>
<!-- Jackson Core -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>${jackson.version}</version>
</dependency>
<!-- Jackson Annotations -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>${jackson.version}</version>
</dependency>
<!-- Jackson Data Bind -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>${jackson.version}</version>
</dependency>
<!-- Jackson Module Jakarta Xmlbind Annotations -->
<dependency>
<groupId>com.fasterxml.jackson.module</groupId>
<artifactId>jackson-module-jakarta-xmlbind-annotations</artifactId>
<version>${jackson.version}</version>
</dependency>
</dependencies>
Make sure to replace the `$ {jackson.version} to the required version number.
2. Create a Java object
Before serializing the Java object to XML, we need to create a Java class and use Jackson XMLBIND Annotations to comment on it.Using Jackson XMLBind Annotations, we can specify the name, name space, attributes of the XML element.
@JacksonXmlRootElement(localName = "user")
public class User {
@JacksonXmlProperty(isAttribute = true)
private int id;
@JacksonXmlProperty
private String name;
// Getters and setters
}
In the above example, the name of the XML root element is specified as "user".`@Jacksonxmlproperty` Note specifies the attributes of XML elements.
3. Sequence to XML
With the Java object and annotation, we can use Jackson for the XML serialization of the object.The following is an example:
ObjectMapper objectMapper = new XmlMapper();
User user = new User();
user.setId(1);
user.setName("Alice");
try {
String xml = objectMapper.writeValueAsString(user);
System.out.println(xml);
} catch (IOException e) {
e.printStackTrace();
}
In the above example, we created an object of `ObjectMapper` and configure it to` xmlmapper`.Then we created a `User` object and set its attributes.Finally, we use the `ObjectMapper.writeValueasstring () method to sequence the` user` to the XML string.
4. Reverse serialization XML
In addition to serialization, Jackson also provides the function of serialization from XML to Java objects.The following is an example:
ObjectMapper objectMapper = new XmlMapper();
String xml = "<user id=\"1\"><name>Alice</name></user>";
try {
User user = objectMapper.readValue(xml, User.class);
System.out.println(user.getId());
System.out.println(user.getName());
} catch (IOException e) {
e.printStackTrace();
}
In the above example, we created an object of `ObjectMapper` and configure it to` xmlmapper`.Then, we created a XML string and used the method of `ObjectMapper.Readvalue ()` to turn it into the `User` object.
Through the above steps, we can successfully integrate the Jackson Module Jakarta XMLBIND Annitations in the Java class library, and implement the serialization and derivativeization of the Java object and XML.
