Why is the information itself not in JSON format when writing information to a JSON file?

Question

Java

I wrote a method that receives JSON, converts it to a Java object and writes it to FIle.json. The problem is that in the file itself (FIle.json) it is not displayed in the usual JSON form, but here's how

"[\n  {\n    \"userId\": 1,\n    \"id\": 1,\n    \"title\": \"sunt aut facere repellat provident occaecati excepturi optio reprehenderit\",\n ...

And all this goes in one line ... Why this is happening, I do not quite understand. Here is the method code

public static void getRequest(String url, String path) {
        PostDTO postDTO = new PostDTO();
        String pathJSONFile = "src/main/resources/allPost.json";
        List<PostPojo> postPojos = null;


        HttpRequest request = HttpRequest.newBuilder()
                .GET()
                .header("accept", "application/json")
                .uri(URI.create(url + path))
                .build();

        try {
            HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
            ObjectMapper objectMapper = new ObjectMapper();

            postPojos = objectMapper.readValue(response.body(), new TypeReference<List<PostPojo>>() {
            });
            objectMapper.writeValue(Paths.get(pathJSONFile).toFile(), response.body());
            postDTO.setStatus(response.statusCode());
            postDTO.setPosts(postPojos);
        } catch (IOException e) {
            e.printStackTrace();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

    }

When I output response.body() through System.out.println , I see what it outputs to the console in the usual JSON form. Tell me what could be the reason?

Answer 1

objectMapper.writeValue(Paths.get(pathJSONFile).toFile(), response.body());

Because you are writing a string (response.body()), not a list of objects (postPojos).