maven依賴

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-dataformat-xml</artifactId>
    <version>2.14.2</version>
</dependency>

@Data
@AllArgsConstructor
@NoArgsConstructor
public class Car {
    private String color;
    private String type;
}

Java Object to JSON

Json JavaObject 互相轉(zhuǎn)換 之 序列化（jackson Java Object to JSON）

JSON to Java Object

Json JavaObject 互相轉(zhuǎn)換 之 反序列化（jackson Json to Java Object）

JSON to Jackson JsonNode

Json JavaObject 互相轉(zhuǎn)換 之 jackson json to JsonNode

Creating a Java List From a JSON Array String

Json JavaObject 互相轉(zhuǎn)換 之 jackson Json to List

Creating Java Map From JSON String

Json JavaObject 互相轉(zhuǎn)換 之 jackson Json to Map

Configuring Serialization or Deserialization Feature

Json JavaObject 互相轉(zhuǎn)換 之 序列化定制化用法
Json JavaObject 互相轉(zhuǎn)換 之 反序列化定制化用法

Creating Custom Serializer or Deserializer

public class CustomCarSerializer extends StdSerializer<Car> {

    public CustomCarSerializer() {
        this(null);
    }

    public CustomCarSerializer(Class<Car> t) {
        super(t);
    }

    @Override
    public void serialize(Car car, JsonGenerator jsonGenerator, SerializerProvider serializer) throws IOException {
        jsonGenerator.writeStartObject();
        jsonGenerator.writeStringField("car_brand", car.getType());
        jsonGenerator.writeEndObject();
    }
}

Car car = new Car("yellow", "renault");

ObjectMapper mapper = new ObjectMapper();
SimpleModule module = new SimpleModule("CustomCarSerializer", new Version(1, 0, 0, null, null, null));
module.addSerializer(Car.class, new CustomCarSerializer());
mapper.registerModule(module);

String carJson = mapper.writeValueAsString(car);
System.out.println(carJson); 
// {"car_brand":"renault"}

public class CustomCarDeserializer extends StdDeserializer<Car> {

    public CustomCarDeserializer() {
        this(null);
    }

    public CustomCarDeserializer(Class<?> vc) {
        super(vc);
    }

    @Override
    public Car deserialize(JsonParser parser, DeserializationContext deserializer) throws IOException {
        Car car = new Car();
        ObjectCodec codec = parser.getCodec();
        JsonNode node = codec.readTree(parser);
        JsonNode colorNode = node.get("color");
        String color = colorNode.asText();
        car.setColor(color);
        return car;
    }
}

String json = "{ \"color\" : \"Black\", \"type\" : \"BMW\" }";

ObjectMapper mapper = new ObjectMapper();
SimpleModule module = new SimpleModule("CustomCarDeserializer", new Version(1, 0, 0, null, null, null));
module.addDeserializer(Car.class, new CustomCarDeserializer());
mapper.registerModule(module);

Car car = mapper.readValue(json, Car.class);
System.out.println(car); // Car(color=Black, type=null)

Handling Date Formats

Read More Jackson Date

public class Request 
{
    private Car car;
    private Date datePurchased;

    // standard getters setters
}

ObjectMapper objectMapper = new ObjectMapper();
DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm a z");
objectMapper.setDateFormat(df);
String carAsString = objectMapper.writeValueAsString(request);
// {"car":{"color":"yellow","type":"renault"},"datePurchased":"2016-07-03 11:43 AM CEST"}

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