deserialization

问题 Using Jackson XmlMapper annotations, how would I deserialize this XML into a pojo? <?xml version="1.0" encoding="UTF-8"?> <open> <creds priv="write" type="internal"> <user>Username1</user> <client_token>abcplaudzrbcy37c</client_token> <client_secret>0cxDE3LE0000=</client_secret> </creds> <creds priv="read" type="internal"> <user>Username1</user> <client_token>123plaudzrbcy37c</client_token> <client_secret>0cxDE3LE1234=</client_secret> </creds> <creds priv="none" type="internal"> <user

问题 I'm currently writing a bidirectional map class, and I'm having some troubles with the serialization/deserialization of the class (question at bottom). Here's the parts of the class that's relevant. /// <summary> /// Represents a dictionary where both keys and values are unique, and the mapping between them is bidirectional. /// </summary> /// <typeparam name="TKey"> The type of the keys in the dictionary. </typeparam> /// <typeparam name="TValue"> The type of the values in the dictionary. <

问题 Suppose I have the following class - public class A { public int P1 { get; internal set; } } Using json.net, I am able to serialize the type with P1 property. However, during deserialization, P1 is not set. Without modifying class A, is there an in build way to handle this? In my case, I am using a class from a different assembly and cannot modify it. 回答1: Yes, you can use a custom ContractResolver to make the internal property writable to Json.Net. Here is the code you would need: class

问题 I am retrieving JSON from an API. I am using newtonsoft (this is json.net right?) to deserialize this into a list of objects. It works. Unfortunately I also need to pass this along to someone else as JSON (they can't call the API directly only I have access to it). I say unfortunately because I need to OUTPUT my JSON that is different from what is being received (the property names need to be different). For example, I have a class called Person, with a property called Name. I want to get

问题 hello dear colleagues, I have a Garden class in which I serialize and deserialize multiple Plant class objects. The serializing is working but the deserializing is not working if a want to assign it to calling variable in the mein static method. public void searilizePlant(ArrayList<Plant> _plants) { try { FileOutputStream fileOut = new FileOutputStream(fileName); ObjectOutputStream out = new ObjectOutputStream(fileOut); for (int i = 0; i < _plants.size(); i++) { out.writeObject(_plants.get(i)

问题 public class UserAction { private final UUID uuid; private String userId; /* more fields, setters and getters here */ public UserAction(){ this.uuid = UUID.fromString(new com.eaio.uuid.UUID().toString()); } public UserAction(UUID uuid){ this.uuid = uuid; } @Override public boolean equals(Object obj) { if (obj == null) { return false; } if (getClass() != obj.getClass()) { return false; } final UserAction other = (UserAction) obj; if (this.uuid != other.uuid && (this.uuid == null || !this.uuid

问题 I want to deserialize json objects to specific types of objects (using Gson library) based on type field value, eg.: [ { "type": "type1", "id": "131481204101", "url": "http://something.com", "name": "BLAH BLAH", "icon": "SOME_STRING", "price": "FREE", "backgroundUrl": "SOME_STRING" }, { .... } ] So type field will have different (but known) values. Based on that value I need to deserialize that json object to appropriate model object, eg.: Type1Model, Type2Model etc. I know I can easily do

问题 I am trying to setup Jackson JSON custom deserializer to convert JSON values into a Long object. I followed the instructions on this site : http://wiki.fasterxml.com/JacksonHowToCustomDeserializers to setup the custom deserializer. However, for the custom deserializer to kick in, I have to always annotate each time e.g. public class TestBean { Long value; @JsonDeserialize(using=LongJsonDeserializer.class) public void setValue(Long value) { this.value = value; } } Is there a way to tell

问题 I want to convert a JSON string into java object, but the class of this object contains abstract fields, which Jackson can't instantiate, and doesn't produce the object. What is the easiest way to tell it about some default implementation of an abstract class, like setDefault(AbstractAnimal.class, Cat.class); or to decide about the implementation class based on JSON attribute name, eg. for JSON object: { ... cat: {...} ... } i would just wite: setImpl("cat", Cat.class); I know it's possible

问题 I have an object with predefined data structure: public class A { public string Id {get;set;} public bool? Enabled {get;set;} public int? Age {get;set;} } and JSON is supposed to be { "Id": "123", "Enabled": true, "Age": 23 } I want to handle JSON error in positive way, and whenever server returns unexpected values for defined data-types I want it to be ignore and default value is set (null). Right now when JSON is partially invalid I'm getting JSON reader exception: { "Id": "123", "Enabled":