java serialization example
Example 1: java deserializer
private Car parseCar(JsonNode node) {
Car car;
ObjectMapper mapper = new ObjectMapper();
SimpleModule module = new SimpleModule().addDeserializer(Car.class, new CarDeserializer());
mapper.registerModule(module);
organization = mapper.convertValue(node, Car.class);
return car;
}
public class CarDeserializer extends StdDeserializer<Car> {
public CarDeserializer() {
super(Car.class);
}
@Override
public Car deserialize(JsonParser jsonParser, DeserializationContext deserializationContext) throws IOException {
ObjectMapper objectMapper = new ObjectMapper();
objectMapper.registerModule(new JodaModule());
Car car = new Car();
car.setName(getValueAsText(root, "carName"));
car.setDoorCount(getValueAsInt(root,"doorCount"));
car.setColor(getValueAsText(root,"color"));
car.setType(getValueAsText(root,"type"));
return car;
}
}
Example 2: java serializer
public class someClass {
ObjectMapper mapper = new ObjectMapper();
SimpleModule module = new SimpleModule();
module.addSerializer(MyAwesomeClass.class, new MyAwesomeSerializer());
mapper.registerModule(module);
jsonNode = mapper.convertValue(myAwesomeObject, JsonNode.class);
}
public class MyAwesomeSerializer extends StdSerializer<MyAwesomeClass> {
public MyAwesomeSerializer() {
super(MyAwesomeClass.class);
}
@Override
public void serialize(MyAwesomeClass myAwesomeClass, JsonGenerator jgen, SerializerProvider provider) throws IOException {
ObjectMapper mapper = new ObjectMapper();
jgen.writeStartObject();
jgen.writeStringField("name", myAwesomeClass.getName());
jgen.writeStringField("age", myAwesomeClass.getAge());
jgen.writeArrayFieldStart("hobbies");
for (Hobby hobby : myAwesomeClass.getHobbies()) {
jgen.writeObject(mapper.convertValue(hobby, JsonNode.class));
}
jgen.writeEndArray();
jgen.writeEndObject();
}
}
Example 3: what is serialization in java
Serialization; when we MAP a Java object to API JSON
format (CONVERT JAVA OBJECT TO JSON);
Deserialization; API JSON/XML ^ MAP it to Java Object
(JSON TO JAVA OBJECT)
Example 4: import java.io.serializable
import java.io.Serializable;
Example 5: serializable in JAVA
public class Employee implements java.io.Serializable {
public String name;
public String address;
public transient int SSN;
public int number;
public void mailCheck() {
System.out.println("Mailing a check to " + name + " " + address);
}
}