jackson自定义反序列化程序仅获取列表xml中的最后一个值

import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.dataformat.xml.XmlMapper;
import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlProperty;
import com.fasterxml.jackson.dataformat.xml.deser.XmlDeserializer;

import java.io.IOException;

public class CustomDeserializer extends XmlDeserializer<CustomObject> {

    @Override
    public CustomObject deserialize(JsonParser jsonParser, DeserializationContext deserializationContext) throws IOException {
        ObjectMapper mapper = (ObjectMapper) jsonParser.getCodec();
        JsonNode root = mapper.readTree(jsonParser);

        // 获取XML中的列表节点
        JsonNode listNode = root.get("list");

        // 获取列表中的最后一个值
        String lastValue = listNode.get(listNode.size() - 1).asText();

        // 创建自定义对象并设置属性值
        CustomObject customObject = new CustomObject();
        customObject.setLastValue(lastValue);

        return customObject;
    }
}

public class CustomObject {
    @JacksonXmlProperty(localName = "lastValue")
    private String lastValue;

    // getter和setter方法

    public static void main(String[] args) throws IOException {
        String xml = "<root><list><value>1</value><value>2</value><value>3</value></list></root>";

        XmlMapper xmlMapper = new XmlMapper();
        SimpleModule module = new SimpleModule();
        module.addDeserializer(CustomObject.class, new CustomDeserializer());
        xmlMapper.registerModule(module);

        CustomObject customObject = xmlMapper.readValue(xml, CustomObject.class);
        System.out.println(customObject.getLastValue()); // 输出：3
    }
}