logo
down
shadow

Java; Jackson; Parsing the array of array json string


Java; Jackson; Parsing the array of array json string

By : ctrinh
Date : November 28 2020, 04:01 AM
I think the issue was by ths following , You don't need to Result class, it is redundant. You need to parse it as List> because your json structure starts as array and contains another arrays.
Here is how you can parse your :
code :
ObjectMapper mapper = new ObjectMapper();
try {
    List<Result> responseList = mapper.readValue(
            Files.readAllBytes(Paths.get("test.json")),
            new TypeReference<List<List<Student>>>() {});

} catch (IOException e) {
    e.printStackTrace();
}


Share : facebook icon twitter icon
Jackson parsing JSON containing an array of objects and array of maps w/ dynamic keys

Jackson parsing JSON containing an array of objects and array of maps w/ dynamic keys


By : Ricardo Ricarte
Date : March 29 2020, 07:55 AM
Hope this helps I have json like this: , Solution:
code :
public class MyCustomClass {
    @JsonProperty("users")
    public LinkedHashMap<String, User> users;

    @JsonProperty("jobs")
    public ArrayList<Job> jobs;
}    
java json array parsing with Jackson

java json array parsing with Jackson


By : user3422684
Date : March 29 2020, 07:55 AM
around this issue I have the following json file , I want to share how I get that, maybe someone will use ...
code :
ObjectMapper mapper = new ObjectMapper();
JsonParser parser = mapper.getJsonFactory().createJsonParser(new File(ConfigurationManager.jsonfile));

JsonToken token = parser.nextToken();

if (token == null) {
    System.out.println("no json file");
}

if (!JsonToken.START_ARRAY.equals(token)) {
    System.out.println("Expected an array");
}   

while (!JsonToken.END_ARRAY.equals(parser.nextToken())) {   
    System.out.println(parser.readValueAsTree().toString()));

    // parse json object here
}       

parser.close();
JAVA Jackson Parsing JSON Response that Contains List/Array

JAVA Jackson Parsing JSON Response that Contains List/Array


By : y2w1y2
Date : March 29 2020, 07:55 AM
wish help you to fix your issue I'm trying to deserialize a JSON string but I keep running into JSON Mapping Exception. I've been scouring the internet but have had little luck. , Your JSON is malformed. As you can see from the error message:
code :
[Source: [{"user":{"userId":"fa6491aeb", ..........]; 
parsing JSON array of JSON objects using Jackson throws JSON Mapping Exception, how to fix?

parsing JSON array of JSON objects using Jackson throws JSON Mapping Exception, how to fix?


By : Netho Goncalves
Date : March 29 2020, 07:55 AM
it fixes the issue This is my JSON : , Try below code.
code :
 try {

       JSONArray  jsonArray = new JSONArray(res);
       List<ShreyPojo> pojoList = new ArrayList<>();

       for(int i = 0; i < jsonArray.length(); i++)
       {
          //JSONObject jsonObject = jsonArray.getJSONObject(i);
            String jsonObject = jsonArray.getString(i);

          ShreyPojo obj = mapper.readValue(jsonObject,ShreyPojo.class); 

           pojoList.add(obj);
       }

   // Use ShreyPojo objects as per requirement

 } catch (Exception e)
 {
    Log.w("Exception = ","" + e.toString());
 }
Convert json array string to java object using jackson API

Convert json array string to java object using jackson API


By : Yogesh
Date : March 29 2020, 07:55 AM
it should still fix some issue I have JSON string like below, and want to convert into Java object using jackson API. , This is the solution, works like charm:
code :
try {
                TypeFactory typeFactory = mapper.getTypeFactory();
                CollectionType collectionType = typeFactory.constructCollectionType(
                                                    List.class, Users.class);
                List<Users> usersList =  mapper.readValue(new File("list.json"), collectionType);     

            } catch (IOException e) {
                e.printStackTrace();
            }
Related Posts Related Posts :
  • How do I make this image larger?
  • Run icCube with JDK 10
  • Expression with Math.random() always returns the same value
  • Getting the Set with the most elements nested in a HashMap using Java Streams
  • XmlSlurper to parse XML and get value of inside elements using Groovy
  • Extracting data from HTML and formatting the output
  • SOLR documentCache JMX metrics clarification
  • Limiting Wildfly 14 Two-Way SSL to specific clients
  • How do I get Min and max values to only print when "year" is entered?
  • Hashmap can't loop - getKey() method not found - Using Java 8
  • Android Studio - Create an EditText with a click of a button
  • Mockito Test not invoking verify() method
  • Wrap method implementations of Java interfaces
  • Remediating dynamic SQL into prepared statements
  • Where do X and Y start at in swing windows
  • java code with files work from eclipse but dont work from cmd
  • Return page object from JPA query
  • I can't figure out why this code in my APCS multiple choice book returns 19
  • How to save data between methods
  • I'm trying to install Apache Gobblin. How can I install it using Gradle?
  • Spring Data Sorting Array or Set into Pageable
  • Question about the Java documentation and its implementation
  • How to make a JButton that when pressed it does a new action
  • Java hibernate No validator could be found for boolean
  • Making a POJO Thread Safe
  • Save the data of a text file in a arraylist
  • Sort a List<String[]> by indices using Comparator
  • Overloading in Java for user input?
  • Unable to format timestamp as YYYY-MM-DD HH:mm:ss in java
  • Access SQLite Helper From Adapter
  • How to stream a csv file with header to a HashMap<String, Double> in Java?
  • can't get go daddy ssl certificate to work with spring boot
  • ResourceBundle can't find BaseName gradle project java
  • Java - map key lookup ignoring case
  • Jackson deserialize map null values to empty string
  • Anyone knows why setCount() is not working in twitter4j?
  • Object Visibility in a Multi-threaded Program in Java
  • Can't store and load an arraylist in an object file
  • convert a string number starts with `00` to `+` in java
  • Java - avoiding NonSuchElementException using ConcurrentLinkedDeque
  • Converting Immutable to mutable list Java
  • Getting nosuchmethod exception
  • How to get MQTT subscriptions
  • Android Google Sign in Exceptions
  • JavaFX - method that waits for user input
  • Replacing values for a particular key in treemap changes values for every key
  • This method call passes a null value for a nonnull method parameter. Either the parameter is annotated as a parameter th
  • Kafka: consume all messages on demand
  • Notify what text was changed in textview
  • Tinkerpop/Gremlin: select vertices together with outgoing edge count
  • transform a list of objects into a list of integers that pass a check
  • Why this java code is showing strange behavior?
  • Maven Project classes not compiling
  • Edit image to make text more clear opencv
  • Android Spinner nullpointer
  • Add result to int array every time you finish counting the occurrence
  • Android import java library
  • How to use LDAP Authentication in a corporate environment
  • adding item during iteration in java special usecase
  • How can I sort a map with string key? like (1 foo , 2 foo)
  • shadow
    Privacy Policy - Terms - Contact Us © bighow.org