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JSON: Unrecognized field exception in spite of having all fields in POJO and JSON file


JSON: Unrecognized field exception in spite of having all fields in POJO and JSON file

By : laurence
Date : November 18 2020, 11:13 AM
help you fix your problem Try using camel case correctly on your getters and setters, I know that does sometimes cause Jackson to produce unexpected results.
code :
public String getName() {
        return name;
  }
 public void setName(String name) {
       this.name = name;
 }
 public String getHouseNumber() {
    return houseNumber;
 }
public void setHouseNumber(String houseNumber) {
    this.houseNumber = houseNumber;
 }


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Jackson unrecognized field exception but field is in JSON

Jackson unrecognized field exception but field is in JSON


By : shubham sharma
Date : March 29 2020, 07:55 AM
should help you out I am using Spring Integration to consume a message with a JSON Payload. , This works fine for me...
code :
@Test
public void test() throws Exception {
    MyMessages mm = new MyMessages();
    MyMessage m = new MyMessage();
    m.setMsgId(1);
    m.setText("foo");
    mm.setMessages(Arrays.asList(m));
    mm.setTimestamp("123");
    @SuppressWarnings("deprecation")
    ObjectToJsonTransformer otjt = new ObjectToJsonTransformer(new ObjectMapper());
    Message<?> message = new GenericMessage<MyMessages>(mm);
    message = otjt.transform(message);
    System.out.println(message);
    @SuppressWarnings("deprecation")
    JsonToObjectTransformer<MyMessages> jtot = new JsonToObjectTransformer<MyMessages>(MyMessages.class, new ObjectMapper());
    message = jtot.transform(message);
    mm = (MyMessages) message.getPayload();
    System.out.println(mm.getTimestamp());
    System.out.println(mm.getMessages().get(0).getText());
}
[Payload={"timestamp":"123","msgs":[{"msgId":1,"msgText":"foo"}]}][Headers={timestamp=1373997151738, id=f2425f36-a500-4aee-93a4-e7e0240ce0f1, content-type=application/json}]
123
foo
    @JsonProperty("msgs")
    @com.fasterxml.jackson.annotation.JsonProperty("msgs")
    public List<MyMessage> messages;
java jackson: get from url rest web service call pojo's (with inner pojo's) as json and map them back to pojo

java jackson: get from url rest web service call pojo's (with inner pojo's) as json and map them back to pojo


By : srinivas
Date : March 29 2020, 07:55 AM
Hope that helps SOLUTION thanks to @peeskillet:
MyPojo myPojo = mapper.readValue(connection.getInputStream(), MyPojo.class);
JAX-RS/JAXB JSON to POJO - Ignore fields in JSON that don't exist in the POJO

JAX-RS/JAXB JSON to POJO - Ignore fields in JSON that don't exist in the POJO


By : Dinesh Bajracharya
Date : March 29 2020, 07:55 AM
will help you I am working on an API that needs to be able to handle JSON payloads on PUT/POST that may be supersets of the known POJO. , Add @JsonIgnoreProperties(ignoreUnknown = true) on top of your class
code :
   @JsonIgnoreProperties(ignoreUnknown = true)    
    @XmlRootElement
    public FruitCounter
    {
       int numberOfApples;
       int numberOfOranges;

       public int getNumberOfApples()
       {
          return this.numberOfApples();
       }

       public int setNumberOfApples(int numberOfApples)
       {
          this.numberOfApples = numberOfApples;
       }

       public int getNumberOfOranges()
       {
          return this.numberOfOranges();
       }

       public int setNumberOfOranges(int numberOfOranges)
       {
          this.numberOfOranges = numberOfOranges;
       }
    }
Partial Update JSON / POJO fields

Partial Update JSON / POJO fields


By : user2271424
Date : March 29 2020, 07:55 AM
I hope this helps . I have found a way around - using Apache Velocity template instead of vanilla json files simplifies the implementation and provides flexibility.
Parsing JSON in java - how to get String or JsonObject from json file property(value - json object) using POJO only

Parsing JSON in java - how to get String or JsonObject from json file property(value - json object) using POJO only


By : user2442547
Date : March 29 2020, 07:55 AM
Hope this helps The json structure is the following: , Done! It's possible with com.google.json lib using setter:
code :
public class File {
    private String key;
    private String value;

    public File() {
    }

    public String getKey() {
        return key;
    }

    public void setKey(String key) {
        this.key = key;
    }

    public String getValue() {
        return value;
    }

    public void setValue(Object value) {
        this.value = new Gson().toJson(value);
    }
}
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