有没有办法使用Jackson JSON处理器进行自定义字段级序列化？例如，我想上这门课
public class Person {
public String name;
public int age;
public int favoriteNumber;
}
serialized to the follow JSON:
{ "name": "Joe", "age": 25, "favoriteNumber": "123" }
请注意，age=25编码为number，而favoriteNumber=123编码为string.开箱即用的杰克逊将int封编组为一个数字.在本例中，我希望将favoriteNumber编码为字符串.
You can implement a custom serializer as follows:
public class Person {
public String name;
public int age;
@JsonSerialize(using = IntToStringSerializer.class, as=String.class)
public int favoriteNumber:
}
public class IntToStringSerializer extends JsonSerializer<Integer> {
@Override
public void serialize(Integer tmpInt,
JsonGenerator jsonGenerator,
SerializerProvider serializerProvider)
throws IOException, JsonProcessingException {
jsonGenerator.writeObject(tmpInt.toString());
}
}
Java应该为您处理从int到Integer的自动装箱.