Is there a global Jackson setting/configuration so that I do not have to annotate every class with @JsonIgnoreProperties(unknown=true)? Answer This should do the job: See the APIs for ObjectMapper and DeserializationFeature for more information.
Tag: json
Ignoring property when deserializing
I have a simple interface with getter and setter for a property. I have another class UserAccount which implements this interface. My problem is that I want to serialize the money property but ignore while deserializing it i.e., dont accept any values from the user for this property. I have tried @JsonIgnore …
JSONObject ClassNotFoundException
I am working in IntelliJ and using Maven. I have a class that uses JSONObject: Maven dependency in the pom.xml file: I can do a mvn clean package and builds successfully. But when I try to run it, I get: Error: java.lang.ClassNotFoundException: org.json.JSONObject Is there anything else I’m missing here…
How to convert list data into json in java
I have a function which is returning Data as List in java class. Now as per my need, I have to convert it into Json Format. Below is my function code snippet: I tried To convert into json by using this code but it is giving type mismatch error as function is of type List… Please help me resolve this.
Convert JSON String to Pretty Print JSON output using Jackson
This is the JSON string I have: I need to convert the above JSON String into Pretty Print JSON Output (using Jackson), like below: Can anyone provide me an example based on my example above? How to achieve this scenario? I know there are lot of examples, but I am not able to understand those properly. Any hel…
Converter from Json into groovy CODE?
It’s a kind of odd question for an odd situation. I have a large JSON structure which I would like to represent in running groovy code. I need groovy objects that mirror the same structure as the JSON objects. As to be expected a web search mostly returns results with groovy/json runtime conversion stuf…
How do I get the compact/minified form of pretty-printed JSON in Java?
How do I make Jackson’s build() method pretty-print its JSON output? is an example that pretty-prints the JSON string. I need to take the pretty-printed version of JSON string and then convert it to the compact/minified form. How can it be done? I need to convert this: to this: I tried to remove ‘…
Jackson JSON custom serialization for certain fields
Is there a way using Jackson JSON Processor to do custom field level serialization? For example, I’d like to have the class serialized to the follow JSON: Note that age=25 is encoded as a number while favoriteNumber=123 is encoded as a string. Out of the box Jackson marshalls int to a number. In this ca…
My JSON files are too big to fit into memory, what can I do?
In my program, I am reading a series of text files from the disk. With each text file, I process out some data and store the results as JSON on the disk. In this design, each file has its own JSON file. In addition to this, I also store some of the data in a separate JSON file, which stores
How to handle a NumberFormatException with Gson in deserialization a JSON response
I’m reading a JSON response with Gson, which returns somtimes a NumberFormatException because an expected int value is set to an empty string. Now I’m wondering what’s the best way to handle this kind of exception. If the value is an empty string, the deserialization should be 0. Expected JS…