How to write List<Number> with OpenCSV?-CodePudding

I have the following field inside a StacItem Object:

@JsonProperty
private List<Number> bbox = null;

I made a basic implementation with OpenCSV to write this Object into a CSV, and it mostly works with this code (i'm showing just the relevant part):

final StatefulBeanToCsv<Object> beanToCSV = new StatefulBeanToCsvBuilder<>(writer)
                .withSeparator(';')
                .build();
        for(StacItem item : items){
            beanToCSV.write(item);
        }
        HttpHeaders httpHeaders = new HttpHeaders();
        httpHeaders.set(HttpHeaders.CONTENT_TYPE, "text/csv");
        httpHeaders.set(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=exportItems.csv");
        logger.info("END WRITING");
        return new ResponseEntity<>(new FileSystemResource(file), HttpStatus.OK);

Here's the twist! In the logs of my Microservice, I see the full structure of that StacItem, and it should have this bbox field:

bbox=[8.24275148213394, 45.5050129344147, 7.62767704092889, 45.0691351737573]

While my implementation returns just this:

"8.24637830863774"

So when I open my CSV I just found the column "bbox" with one value but I need the others too..Can you please tell me why it stops on the first one or how to get the others 3?

UPDATE: I found that this does the trick! But then...it exports just this single field for every StacItem so I lose every other field in my Object.

@CsvBindAndSplitByName(elementType = Number.class, writeDelimiter = ",")
    @JsonProperty("bbox")
    private List<Number> bbox = null;

Thanks

CodePudding user response：

Try using CsvBindByName on every field you want to map (specify the name attribute of the annotation is not mandatory).

You can even use CsvBindByPosition if you prefer.

CodePudding user response：

Did you try to change ?

 beanToCSV.write(item); -> beanToCSV.writeNext(item);

    for(StacItem item : items){
        beanToCSV.write(item);
    }

    // to

    beanToCSV.write(items);