if we have a Product and Supplier object, where Product has a supplier and a supplier has a Product, how can we indicate to the entities that this is not an infinite cycle when obtaining the JSON of a product? this would be something like how could we configure this in java with JPA by levels? so that it is
Tag: json
is there a way to check for existence of a key in JSONObject of org.json java package?
Essentially its as the title says, I want to check if key “error” exists in the JSONObject but guarding it with try catch as a part of normal control flow seems to be a very bad and dirty thing to do, so surely it cant be the intended solution. But I cant think of any other way to do it.
ERROR: org.codehaus.jackson.map.JsonMappingException
I’m using lombok + Java to otimizate the application. The class has the tags @Data , @EqualsAndHashCode(callSuper = false), @NoArgsConstructor, @AllArgsConstructor e @Builder before signature’s class. When I run, It shows the error below: ERROR: org.apache.cxf.jaxrs.JAXRSRuntimeException: org.code…
Deserialize json string with nested array of objects with dynamic key
Given the JSON string I need to convert it to my POJO named TransactionInfo JSON String POJO Additional Note (From comment) After the deserialization, I want to access different keys in the transactionProperties map. If it’s converted into a List<Map<String,String>> then it becomes complex. …
How do I extract exact value from Json
Below Json I want to get only first mail value (abc@test.com) using java. Please anybody can suggest how do I extract exact value from below Json. Thanks in advance. Answer as they have already said json standard doesn’t impose ordering, so be careful
Converting a class containing a hashmap of non-primitive keys or values to Json
I want to convert a class which contains a Hashmap of non-primitive keys or values to Json using Gson. so I realize that Hashmap keys and values are stored only as Strings when serializing with Gson. so I can’t serialize them. I ran into this solution which should be fine, but I get this error: any idea…
apache poi convert excel to json [closed]
Closed. This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 7 months ago. Improve this question ExcelToJson converter The method works correctly, but at the output it produces an array, w…
Java exception handling: JSONObject cannot convert JSONArray
After executeQuery, I’ve got some set of results in XML format. While checking xmlJSONObj.getJSONObject(“Root”).has(“AmountDtl”), I get an exception “JSONObject[“Root”] is not a JSONObject”. How to handle this exception? Answer In your case. You have If yo…
Exclude fields from Java object using Spring
I have two endpoint who use the same model class (Cars). For the searchBigList endpoint I would like to retrieve all car fields and for searchCarSmallList endpoint I would like to retrieve just 3 fields. I tried to do it with @JsonView annotation but it was not working for me. Anyone have better idea how to d…
Get values by key from JSON Multi-dimensional Array
JSON: Code: Output: I’m only retrieving the first value How do I retrieve all name values from a nested JSON Array? Thanks in advance! Answer With your current implementation, you are getting JsonNode object and you are reading it’s name property, but you are not reading that property for it’…