使用Jackson XmlMapper对POJO进行XML反序列化
使用Jackson XmlMapper注释，如何将此XML反序列化为pojo？
Username1 abcplaudzrbcy37c 0cxDE3LE0000= Username1 123plaudzrbcy37c 0cxDE3LE1234= Username1 000plaudzrbcy37c 0cxDE3LEabcd= 我试图使用这样的东西：
@JacksonXmlRootElement(localName = "Open") public class OpenCredentials { @JacksonXmlProperty(localName = "Credentials") private Credentials[] credentials; } class Credentials { @JacksonXmlProperty(isAttribute = true) private String priv; @JacksonXmlProperty(isAttribute = true) private String type; @JacksonXmlProperty(localName = "Creds") private Creds[] creds; } class Creds { @JacksonXmlText(value = true) private String user; @JacksonXmlText(value = true) private String client_token; @JacksonXmlText(value = true) private String client_secret; }
当我尝试使用XmlMapper的readValue（）时，我收到以下错误：
com.fasterxml.jackson.databind.JsonMappingException: Duplicate property '' for [simple type, class com.company.data.utils.api.Creds] at com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCache2(DeserializerCache.java:268) at com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCacheValueDeserializer(DeserializerCache.java:243)
您的POJO类不适合您的XML 。 结构比你想象的简单。 见下面的例子：
@JacksonXmlRootElement(localName = "open") class OpenCredentials { @JacksonXmlProperty(localName = "creds") @JacksonXmlElementWrapper(useWrapping = false) private Credentials[] credentials; //getters, setters, toString } class Credentials { @JacksonXmlProperty(isAttribute = true) private String priv; @JacksonXmlProperty(isAttribute = true) private String type; private String user; @JacksonXmlProperty(localName = "client_token") private String clientToken; @JacksonXmlProperty(localName = "client_secret") private String clientSecret; //getters, setters, toString }
简单用法：
XmlMapper mapper = new XmlMapper(); OpenCredentials openCredentials = mapper.readValue(XML, OpenCredentials.class); System.out.println(openCredentials);
上面的程序打印（对于您的XML ）：
OpenCredentials{credentials=[Credentials{priv='write', type='internal', user='Username1', client_token='abcplaudzrbcy37c', client_secret='0cxDE3LE0000='}, Credentials{priv='read', type='internal', user='Username1', client_token='123plaudzrbcy37c', client_secret='0cxDE3LE1234='}, Credentials{priv='none', type='internal', user='Username1', client_token='000plaudzrbcy37c', client_secret='0cxDE3LEabcd='}]}
也可以看看：
- jackson-dataformat-xml 。
- 主页：Jackson XML databind Wiki 。