CODEWITHSUNDEEP
javajsonspring-mvcspring-bootresttemplate
dfsg76
dfsg76

Reputation: 524

Resttemplate does not deserialize JSON correctly

my server outputs the following JSON object: (ContentType = application/json)

{"Name":["Name1","Name2"]}

This is my Java code for trying to read that into a POJO.

It creates an instance of the Names class but the array inside is null.

What am I missing here?

restTemplate = new RestTemplate();
uri = "http://localhost:80/api/names";

Names namesWrapperInstance = restTemplate.getForObject(uri, Names.class);

if(namesWrapperInstance != null && namesWrapperInstance.getNames() != null) {
  for(String name : namesWrapperInstance.getNames()) {
    System.out.print(name);
  }
}

@JsonRootName(value = "Name")
class Names {
  private String[] Names;

  public Names() {

  }

  public String[] getNames() {
    return Names;
  }

  public void setNames(String[] Names) {
    this.Names = Names;
  }
}

Upvotes: 1

Views: 2600

Answers (1)

JB Nizet
JB Nizet

Reputation: 691625

Remove the JsonRootName annotation, respect the Java naming conventions in your Java code, and annotate the names field with @JsonProperty("Name").

I'd strongly suggest to use collections rather than arrays, too.

If you can, you should really refactor the JSON, too. Use lowercase for fields, just as in Java, and rename it to names, since it's an array, containing several names, and not just one. If you do that, the JsonProperty annotation won't even be necessary anymore.

Upvotes: 3

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