<dependency>
    <groupId>com.fasterxml.jackson.dataformat</groupId>
    <artifactId>jackson-dataformat-xml</artifactId>
    <version>2.9.8</version>
</dependency>

@Data
@Builder
@JacksonXmlRootElement(localName = "top_element")
public class TestBean implements Serializable {

    // isAttribute =If true is given, it becomes an attribute
    @JacksonXmlProperty(localName = "id", isAttribute = true)
    private String topElement;

    @JacksonXmlProperty(localName = "test_field")
    private String testField;
    
    //You can also write nested beans
    @JacksonXmlProperty(localName = "test_inner_bean")
    private TestInnerBean testInnerBean;

    //You can have a list of beans in the field
    @JacksonXmlElementWrapper(localName = "dtls")
    @JacksonXmlProperty(localName = "dtl")
    private List<DtlsInnerDto> dtlsInnerDto;

@SuppressWarnings("serial")
@Data
@Builder
public class TestInnerBean implements Serializable {

    @JacksonXmlProperty(localName = "inner_field_one")
    private String innerFieldOne;

    @JacksonXmlProperty(localName = "inner_field_two")
    private String innerFieldTwo;
}

@SuppressWarnings("serial")
@Data
@Builder
public class DtlsInnerDto implements Serializeble {
    @JacksonXmlProperty(localName = "dtl_item")
    private String dtlItem;
}

import com.fasterxml.jackson.dataformat.xml.XmlMapper;

String xml = new XmlMapper().writeValueAsString(Bean assembly process());

<top_element id="xxx">
  <test_field>xxx</test_field>
  <test_inner_bean>
     <inner_field_one>xxx</inner_field_one>
     <inner_field_two>xxx</inner_field_two>
  </test_inner_bean>
　<dtls>
    <dtl>xxx</dtl>
    <dtl>yyy</dtl>
    <dtl>zzz</dtl>
  </dtls>
</top_element>

import com.fasterxml.jackson.dataformat.xml.XmlMapper;

Bean class bean= new XmlMapper().readValue(xml string,Bean class.class)

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