Package com.fasterxml.jackson.databind

Basic data binding (mapping) functionality thatallows for reading JSON content into Java Objects (POJOs)and JSON Trees (JsonNode), as well aswriting Java Objects and trees as JSON.

See: Description

Package com.fasterxml.jackson.databind Description

Basic data binding (mapping) functionality thatallows for reading JSON content into Java Objects (POJOs)and JSON Trees (JsonNode), as well aswriting Java Objects and trees as JSON.Reading and writing (as well as related additional functionality) is accessed throughObjectMapper,ObjectReader andObjectWriter classes. In addition to reading and writing JSON content, it is also possible to use the general databinding functionality for many other data formats, using Jackson extension modules that provide such support: if so, you typically simply construct an ObjectMapper with different underlying streaming parser, generator implementation.

The main starting point for operations is ObjectMapper,which can be used either directly (via multiple overloadedreadValue,readTree,writeValue andwriteTree methods, or it can be used as a configurable factory for constructingfully immutable, thread-safe and reusable ObjectReaderand ObjectWriter objects.

In addition to simple reading and writing of JSON as POJOs or JSON trees (represented asJsonNode, and configurability needed to change aspectsof reading/writing, mapper contains additional functionality such as:

Simplest usage is of form:

  final ObjectMapper mapper = new ObjectMapper(); // can use static singleton, inject: just make sure to reuse!  MyValue value = new MyValue();  // ... and configure  File newState = new File("my-stuff.json");  mapper.writeValue(newState, value); // writes JSON serialization of MyValue instance  // or, read  MyValue older = mapper.readValue(new File("my-older-stuff.json"), MyValue.class);  // Or if you prefer JSON Tree representation:  JsonNode root = mapper.readTree(newState);  // and find values by, for example, using a JsonPointer expression:  int age = root.at("/personal/age").getValueAsInt(); 

For more usage, refer toObjectMapper,ObjectReader andObjectWriterJavadocs.

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