[英]Jackson xml empty element serialization
I'm having a hard time with this one. 我很难用这个。 Jackson 2.2 XML serializer seems to serialize empty object fields this way:
Jackson 2.2 XML序列化器似乎以这种方式序列化空对象字段:
<field/>
How can I force it to serialize such empty field like this: 如何强制它序列化这样的空字段,如下所示:
<field></field>
Thank you very much for your time and answers. 非常感谢你的时间和答案。
Please, see this question: How do you override the null serializer in Jackson 2.0? 请看这个问题: 你如何覆盖Jackson 2.0中的null序列化器? .
。 For
XmlMapper
it could look like below. 对于
XmlMapper
它可能如下所示。 Create NullSerializer
: 创建
NullSerializer
:
class NullSerializer extends JsonSerializer<Object> {
@Override
public void serialize(Object value, JsonGenerator jgen, SerializerProvider provider) throws IOException, JsonProcessingException {
jgen.writeString("");
}
}
and simple usage: 简单用法:
XmlSerializerProvider provider = new XmlSerializerProvider(new XmlRootNameLookup());
provider.setNullValueSerializer(new NullSerializer());
XmlMapper xmlMapper = new XmlMapper();
xmlMapper.setSerializerProvider(provider);
System.out.println(xmlMapper.writeValueAsString(new Entity()));
Above program prints: 以上程序打印:
<Entity xmlns=""><field></field></Entity>
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