Java <;!CDATA[]]>;映射到"&引用;而不是空杰克逊
我有一个函数,可以将Kafka主题中的XML读入字符串格式,然后将其转换为JSON对象 XML示例:Java <;!CDATA[]]>;映射到"&引用;而不是空杰克逊,java,jackson,mapping,pojo,xml-to-json,Java,Jackson,Mapping,Pojo,Xml To Json,我有一个函数,可以将Kafka主题中的XML读入字符串格式,然后将其转换为JSON对象 XML示例: <Example> <Object> <Member1><![CDATA[]]</Member1> <Member2><![CDATA[someText]]</Member2> </Object> </Example> 然后,我使用MappingJackson2X
<Example>
<Object>
<Member1><![CDATA[]]</Member1>
<Member2><![CDATA[someText]]</Member2>
</Object>
</Example>
然后,我使用MappingJackson2XmlHttpMessageConverter获取对象映射器,并使用该映射器将XML字符串映射到示例类
@Autowired ObjectMapper xmlMapper;
@Autowired
private MappingJackson2XmlHttpMessageConverter xmlConverter;
...
xmlMapper = xmlConverter.getObjectMapper();
Example example = xmlMapper.readValue(xmlString, Example.class);
这将生成一个具有以下内容的示例类:
Example
-> object
-> member1 : ""
-> member2 : "someText"
我希望member1为null,而不是空字符串。如何实现这一点?您需要实现自己的
com.fasterxml.jackson.databind.util.Converter
,它将在反序列化后但在设置为所需格式之前转换您的值
实施示例:
class CDATAConverter implements Converter<String, String> {
@Override
public String convert(String value) {
return (value == null || value.length() == 0) ? null : value;
}
@Override
public JavaType getInputType(TypeFactory typeFactory) {
return typeFactory.constructType(String.class);
}
@Override
public JavaType getOutputType(TypeFactory typeFactory) {
return typeFactory.constructType(String.class);
}
}
您需要实现自己的
com.fasterxml.jackson.databind.util.Converter
,它将在反序列化之后但在设置为所需格式之前转换您的值
实施示例:
class CDATAConverter implements Converter<String, String> {
@Override
public String convert(String value) {
return (value == null || value.length() == 0) ? null : value;
}
@Override
public JavaType getInputType(TypeFactory typeFactory) {
return typeFactory.constructType(String.class);
}
@Override
public JavaType getOutputType(TypeFactory typeFactory) {
return typeFactory.constructType(String.class);
}
}
您是否尝试只提供member2而不提供member1?是否尝试只提供member2而不提供member1?
class CDATAConverter implements Converter<String, String> {
@Override
public String convert(String value) {
return (value == null || value.length() == 0) ? null : value;
}
@Override
public JavaType getInputType(TypeFactory typeFactory) {
return typeFactory.constructType(String.class);
}
@Override
public JavaType getOutputType(TypeFactory typeFactory) {
return typeFactory.constructType(String.class);
}
}
@Getter
@Setter
@ToString
class SomeObject {
@JsonDeserialize(converter = CDATAConverter.class)
@JacksonXmlProperty(localName = "Member1")
private String member1;
@JsonDeserialize(converter = CDATAConverter.class)
@JacksonXmlProperty(localName = "Member2")
private String member2;
}