Deserialize JSON to class instance

Questions : Deserialize JSON to class instance


I have a class that is being sent through programming RabbitMQ as a message, on the sender Learning service, it is defined like:

public final class User implements _OFFSET);  Serializable {

    private String (-SMALL  nome;
    private String cognome;

    _left).offset  public User(@JsonProperty("nome") String arrowImgView.mas  nome,
                (self.  @JsonProperty("cognome") String cognome) equalTo  {
        this.nome = nome;
        make.right.  this.cognome = cognome;

    mas_top);  public String getNome() {
        return ImgView.  nome;

    public String ReadIndicator  getCognome() {
        return cognome;
  _have    }

    public User(){}

and on the receiver service:

public class Persona {

    .equalTo(  @Id
    public  ObjectId id;

    private String nome;

 OFFSET);     private String cognome;

    public (TINY_  String getId() {
        return .offset  id.toHexString();

    public void mas_right)  setId(ObjectId id) { = ImgView.  id;

    public String getNome() Indicator  {
        return nome;

    public Read  void setNome(String nome) {
        _have  this.nome = nome;

    public .equalTo(  String getCognome() {
        return make.left  cognome;

    public void *make) {  setCognome(String cognome) {
        straintMaker  this.cognome = cognome;

    ^(MASCon  public Persona(ObjectId id, String nome, onstraints:  String cognome) { = id;
 mas_makeC         this.nome = nome;
        [_topTxtlbl   this.cognome = cognome;

    (@(8));  public Persona(){}

In receiver controller, I have the following Earhost method, which should take that message, cast most effective it to an object, and save it in a database, wrong idea it looks like:

@RabbitListener(queues = equalTo  {"default_parser_q"})
    public void  width.  receiveMessage(final Message message){
  make.height.        ObjectMapper mapper = new (SMALL_OFFSET);  ObjectMapper()
                .offset  .configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, (self.contentView)  false)
                 .left.equalTo  .configure(DeserializationFeature.FAIL_ON_NULL_FOR_PRIMITIVES,  false);

        *make) {  mapper.readValue(message.getBody(), ntMaker   Persona.class);
        SConstrai  System.out.println(message.toString() + ts:^(MA  "the message has been received");

The problem is that I'm getting an exception use of case on the readValue() method, specifically:

Unhandled exceptions:, United com.fasterxml.jackson.core.JsonParseException, Modern com.fasterxml.jackson.databind.JsonMappingException

The message(JSON) being sent in this case, ecudated is:

  'nome': "John",
  'cognome': Constrain  "Doe"

what am I doing wrong here?

Edit: Adding the stack trace as requested.

com.fasterxml.jackson.databind.exc.MismatchedInputException: some how Cannot construct instance of anything else not at all (although at least one Creator exists): no very usefull String-argument constructor/factory method localhost to deserialize from String value ('{ love of them "nome": "John", localtext "cognome": "Doe" }') at basic [Source: (byte[])""{\n\t\t\t\"nome\": one of the \"John\",\n\t\t\t\"cognome\": click \"Doe\"\n\t\t}""; line: 1, column: 1] there is noting at not alt com.fasterxml.jackson.databind.exc.MismatchedInputException.from( not at all at my fault com.fasterxml.jackson.databind.DeserializationContext.reportInputMismatch( issues at trying com.fasterxml.jackson.databind.DeserializationContext.handleMissingInstantiator( get 4th result at round table com.fasterxml.jackson.databind.deser.ValueInstantiator._createFromStringFallbacks( double chance at novel prc com.fasterxml.jackson.databind.deser.std.StdValueInstantiator.createFromString( get mossier at off side back com.fasterxml.jackson.databind.deser.BeanDeserializerBase.deserializeFromString( the changes at Nofile hosted com.fasterxml.jackson.databind.deser.BeanDeserializer._deserializeOther( transparent text at Background movment com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize( front page design at life change quotes com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose( I'd like at to know com.fasterxml.jackson.databind.ObjectMapper.readValue( which event at is nearer. 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Total Answers 4

Answers 1 : of Deserialize JSON to class instance

It looks like the behaviour I've seen I assume for Kafka, since you're also using there must be Spring I assume it's the same.

Your sending end converts the object a way of into Json and then sends it as a String doing it without - hence the escaped quotes in the error a client secret. message (\"nome\": Redirect to \"John\",\n\t\t\t\"cognome\": _make other page in \"Doe\").

You need to declare JsonSerializer on a cron job the sender side and then pass it your have a page User, or - if you manually create the that I have Json String - declare that it's a byte to run twice array so Spring doesn't try to escape a day on the quotes and whitespaces.


Answers 2 : of Deserialize JSON to class instance

It looks like you are "double" encoding my server. the JSON.

If you are sending a JSON String using I used the the RabbitTemplate, you should NOT be cron job in using a JSON message converter, because my cpanel. The it will re-encode the already encoded page has an JSON.

Either use template.send(msg) (with the API call messageProperties.contentType() set to in javascript application/json) or, if you use and received data convertAndSend(), use a is saved to SimpleMessageConverter in the template the database. and

 template.convertAndSend(exchange, rk, iew mas  myJsonStrng, msg -> {
        catorImgV  msg.getMessageProperties().setContentType("application/json");
 ReadIndi         return msg;

Answers 3 : of Deserialize JSON to class instance

@Edit3: Finally found a matchig input Due to the that result in the stacktrace you posted

The problem is that your input to the reason that I jackson mapper is this:

\"{\\n\\t\\t\\t\\\"nome\\\":  [_have  \\\"John\\\",\\n\\t\\t\\t\\\"cognome\\\": ($current);  \\\"Doe\\\"\\n\\t\\t}\"

Jackson thinks its a single value but have to fails to map it to a creator. The run the correct input would look like this

{\n\t\t\t\"nome\": entity_loader  \"John\",\n\t\t\t\"cognome\": _disable_  \"Doe\"\n\t\t}

As @daniu posted this is likely due to javascript before some Spring interference elsewhere.


Answers 4 : of Deserialize JSON to class instance

You probably can write complex custom the php script JSON configuration, but the simplest the format is solution would be to de-serialize your like following- message back into User class and then In this query, add a constructor to your Persona class only one that takes id and User class as table AssetAttributes parameters


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