Having trouble mapping my JSON to a Spring Boot @RequestBody POJO

I'm struggling with an issue where I have a hard-coded JSON object that is supposed to map to my POJO in Spring Controller, but I keep getting null values. I have double-checked my getters and setters, and everything seems to be correct. Can anyone help me figure out what I am doing wrong?

Controller

@PostMapping("/dashboard")
public Dashboard getDashboard(@RequestBody PaginationRequest paginationRequest) {
      return topcatService.getDashboard(paginationRequest);
}

JSON

 var paginationRequest = { grouping  : e.target.value ,total : "1", currentPage : "1", pageSize : "5"};

POJO

 public class PaginationRequest {
        private String grouping;
        private String total;
        private String  currentPage;
        private String pageSize;

       //setter/getter
    }
javascriptjavaspring-boot

Answer №1

To ensure proper data serialization, consider making your properties public and using the @JsonProperty annotation for each property (e.g. @JsonProperty("grouping")). It's possible that your getters and setters do not adhere to standard naming conventions.

Answer №2

To ensure your data is properly received by your controller, it is essential to first create a valid JSON structure and test it.

You can test this by sending an example JSON like the following:

var paginationRequest = '{"grouping":"anyValue","total":"1","currentPage":"1","pageSize": "5"}';

This demonstrates sending only a String in JSON format.

If you have an Object, you may need to convert it to a JSON String:

var somejson =  JSON.stringify(someobject);

Answer №3

It appears that I have identified the issue.

Ironically, it turns out to be a simple mistake on my part.

Upon closer inspection, I discovered that the @RequiredBody annotation was mistakenly imported from the swagger dependency instead of spring. The signatures are identical, making it difficult to pinpoint the error initially.

Answer №4

Here are a few tweaks I can recommend,

@RequestMapping(value = "/dashboard", method = RequestMethod.POST, 
                consumes = "application/json", produces = "application/json")
public Dashboard displayDashboardInfo(@RequestBody PaginationRequest paginationRequest) {

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