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Failed to read JSON: Unrecognized field (...) not marked as ignorant

Yes, I know this issue has been discussed several times, but I was unable to resolve my problem.

So, I am getting JSONObject from http request using org.springframework.web.client.RestTemplate:

JSONObject j = RestTemplate.getForObject(url, JSONObject.class);

But I am getting this error:

    Exception in thread "main" org.springframework.http.converter.HttpMessageNotReadableException: Could not read JSON: Unrecognized field "uri" (Class org.json.JSONObject), not marked as ignorable
 at [Source: sun.net.www.protocol.http.HttpURLConnection$HttpInputStream@6f526c5f; line: 2, column: 12] (through reference chain: org.json.JSONObject["uri"]); nested exception is org.codehaus.jackson.map.exc.UnrecognizedPropertyException: Unrecognized field "uri" (Class org.json.JSONObject), not marked as ignorable
 at [Source: sun.net.www.protocol.http.HttpURLConnection$HttpInputStream@6f526c5f; line: 2, column: 12] (through reference chain: org.json.JSONObject["uri"])
    at org.springframework.http.converter.json.MappingJacksonHttpMessageConverter.readJavaType(MappingJacksonHttpMessageConverter.java:181)
    at org.springframework.http.converter.json.MappingJacksonHttpMessageConverter.read(MappingJacksonHttpMessageConverter.java:173)
    at org.springframework.web.client.HttpMessageConverterExtractor.extractData(HttpMessageConverterExtractor.java:94)
    at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:517)
    at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:472)
    at org.springframework.web.client.RestTemplate.getForObject(RestTemplate.java:237)

I want to access Rest-Api and Json objects can have different field names. I've already tried it @JsonIgnoreProperties(ignoreUnknown=true)

. But that won't work ...

How do I get the response in JSONObject?

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2 answers


You can use this with Jackson 2.0:

ObjectMapper objectMapper = new ObjectMapper();
objectMapper.configure(
DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);


If your version is before 2.0:

ObjectMapper objectMapper = new ObjectMapper();
objectMapper.configure(
DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES, false);
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org.codehaus.jackson.JsonParseException: Unexpected character ("h" (code 104)): a valid value expected (number, string, array, object, true, false, or null)



** Note: ** You are getting an error because you are not sending data in the right JSON format.

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