Snippets tagged “jackson”
11 snippets use this tag.
- Convert JSON to MapJava
You can use the Gson library to convert a JSON string to a Map in Java.
- Date format Mapping to JSON JacksonJava
You can use the @JsonFormat annotation to specify the format of date fields in a JSON payload when serializing or deserializing using Jackson.
- How do you return a JSON object from a Java ServletJava
To return a JSON object from a Java Servlet, you can use the following steps:
- How to convert hashmap to JSON object in JavaJava
To convert a hashmap to a JSON object in Java, you can use the org.json library. Here's an example:
- How to convert jsonString to JSONObject in JavaJava
To convert a JSON string to a JSONObject in Java, you can use the JSONObject constructor that takes a String as an argument, like this:
- How to tell Jackson to ignore a field during serialization if its value is null?Java
There are a few ways to tell Jackson to ignore a field during serialization if its value is null. One way is to use the @JsonInclude annotation with the Include.NON_NULL value on the field or class level.
- How to use Jackson to deserialise an array of objectsJava
Jackson is a powerful Java library for processing JSON data. You can use Jackson to deserialize an array of objects by following these steps:
- Ignoring new fields on JSON objects using JacksonJava
If you want to ignore new fields on JSON objects when using Jackson, you can use the @JsonIgnoreProperties annotation on your Java object.
- Jackson with JSON: Unrecognized field, not marked as ignorableJava
If you are using the Jackson library to parse JSON in Java and you get the error "Unrecognized field, not marked as ignorable", it means that you are trying to parse a JSON object that has a field that is not recognized by your Java object.
- Serializing with Jackson (JSON) - getting "No serializer found"?Java
If you are getting the error "No serializer found" when trying to serialize an object to JSON using Jackson, it usually means that Jackson does not know how to serialize one or more fields in the object.
- When is the @JsonProperty property used and what is it used for?Java
The @JsonProperty annotation is used to specify the property name in a JSON object when serializing or deserializing a Java object using the Jackson library.