Menu
I have a String with the following value:
[ { "key1": "value11", "key2": "value12" }, { "key1": "value21", "key2": "value22" } ] And the following class:
public class SomeClass { private String key1; private String key2; /* ... getters and setters omitted ...*/ } And I want to parse it to a List<SomeClass> or a SomeClass[]
Which is the simplest way to do it using Jackson ObjectMapper?
313
Approach 1: First convert the JSON string to the JavaScript object using JSON. Parse() method and then take out the values of the object and push them into the array using push() method.
databind. ObjectMapper ) is the simplest way to parse JSON with Jackson. The Jackson ObjectMapper can parse JSON from a string, stream or file, and create a Java object or object graph representing the parsed JSON. Parsing JSON into Java objects is also referred to as to deserialize Java objects from JSON.
Convert JSON to Array Using `json.The parse() function takes the argument of the JSON source and converts it to the JSON format, because most of the time when you fetch the data from the server the format of the response is the string. Make sure that it has a string value coming from a server or the local source.
parse method to parse a JSON array into its JavaScript equivalent. The only parameter we passed to the method is the JSON string that should be parsed. If you provide invalid JSON to the method, a SyntaxError exception is thrown.
I finally got it:
ObjectMapper objectMapper = new ObjectMapper(); TypeFactory typeFactory = objectMapper.getTypeFactory(); List<SomeClass> someClassList = objectMapper.readValue(jsonString, typeFactory.constructCollectionType(List.class, SomeClass.class)); If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With