Convert JSON to map with string keys and List<String> values

Convert JSON to map with string keys and List<String> values

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Convert JSON to map with string keys and List<String> values
Tag : dart , By : ChaseVoid
Date : November 29 2020, 04:01 AM

With these it helps
So, I assume that the .cast<> method introduced with Dart 2 doesn't know how to convert nested types that aren't simple types like String, int, or bool.
void main() {
  var jsonString = '{"key": ["1", "2", "3"]}';
  var data = json.decode(jsonString) as Map;

  var result = data.map((key, value) =>
      MapEntry<String, List<String>>(key, List<String>.from(value)));

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Getting keys and values from a list on a JSON String using BasicDBObject

Tag : java , By : Adil
Date : March 29 2020, 07:55 AM
wish of those help I have a String with a JSON that contains a list. Its something like this:
Document document = Document.parse(jsonString);
List<Document> countsArray = document.get("counts",List.class);
for (Document doc : countsArray){
    doc.keySet(); //keys
    doc.values(); //values
    for (Map.Entry entry : doc.entrySet()){
        // iterate over each pair

How to convert 2 Java String arrays of keys & values into a json object

Tag : java , By : alexmajy
Date : March 29 2020, 07:55 AM
I hope this helps you . You can iterate over the arrays, taking each key, value pair, and add them to a JSON object.
JsonObject jsonObject = new JsonObject();

for (int i = 0; i < keys.length; i ++) {
    jsonObject.addProperty(keys[i], values[i]);
ObjectNode jsonObject = JsonNodeFactory.instance.objectNode();

for (int i = 0; i < keys.length; i ++) {
    jsonObject.put(keys[i], values[i]);

How to convert a Json tree of string keys and float values to a Map

Tag : java , By : browe
Date : March 29 2020, 07:55 AM
I hope this helps you . I have the below String and I wanted to convert it into a Map of String, Float. , Try this:
 Map<String, Float> map = mapper.readValue(tree, new TypeReference<Map<String, Float>>(){});

search and replace values for multiple keys in a json string using pcre regex for a list of keys

Tag : regex , By : Milander
Date : March 29 2020, 07:55 AM
I wish this helpful for you Use:
Find: (?:^.*?\| PRE2 \|.*?{\K|\G)(.*?"(?:key1|key2|key4)":")\w+("[,}]) Replace: $1_x_$2

Is there a direct way to convert Map<String, List<String>> into a JSON String (using javax.json library)

Tag : java , By : Tom Berthon
Date : March 29 2020, 07:55 AM
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