JSON:JsonMappingException,同时尝试使用空值反序列化对象

我尝试反序列化包含null属性并具有的对象JsonMappingException

String actual = "{\"@class\" : \"PersonResponse\"," +

" \"id\" : \"PersonResponse\"," +

" \"result\" : \"Ok\"," +

" \"message\" : \"Send new person object to the client\"," +

" \"person\" : {" +

" \"id\" : 51," +

" \"firstName\" : null}}";

ObjectMapper mapper = new ObjectMapper();

mapper.readValue(new StringReader(json), PersonResponse.class); //EXCEPTION!

:如果扔掉"firstName = null"财产-一切正常!我的意思是传递下一个字符串:

String test = "{\"@class\" : \"PersonResponse\"," +

" \"id\" : \"PersonResponse\"," +

" \"result\" : \"Ok\"," +

" \"message\" : \"Send new person object to the client\"," +

" \"person\" : {" +

" \"id\" : 51}}";

ObjectMapper mapper = new ObjectMapper();

mapper.readValue(new StringReader(json), PersonResponse.class); //ALL WORKS FINE!

:如何避免此异常或保证杰克逊在序列化期间忽略空值?

com.fasterxml.jackson.databind.MessageJsonException:

com.fasterxml.jackson.databind.JsonMappingException:

N/A (through reference chain: person.Create["person"]->Person["firstName"])

com.fasterxml.jackson.databind.MessageJsonException:

com.fasterxml.jackson.databind.JsonMappingException:

N/A (through reference chain: prson.Create["person"]->Person["firstName"])

java.lang.NullPointerException

回答:

如果您不想序列化null值,则可以使用以下设置(序列化期间):

objectMapper.setSerializationInclusion(Include.NON_NULL);

希望这能解决您的问题。

但是NullPointerException反序列化过程中获得的结果对我来说似乎很可疑(理想情况下,杰克逊应该能够处理null序列化输出中的值)。您可以张贴与PersonResponse课程相对应的代码吗?

以上是 JSON:JsonMappingException,同时尝试使用空值反序列化对象 的全部内容, 来源链接: utcz.com/qa/413657.html

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