jackson 若干问

https://www.jianshu.com/p/7a4653704acb

https://cloud.tencent.com/developer/article/2394800

https://developer.aliyun.com/article/1001646

https://stackoverflow.com/questions/24280605/how-to-create-json-array-using-jackson

https://www.baeldung.com/jackson-object-mapper-tutorial

https://stackoverflow.com/questions/22258487/convert-jackson-object-into-jsonobject-java

https://www.baeldung.com/java-jackson-jsonnode-objectnode

https://stackoverflow.com/questions/38759976/jackson-json-difference-between-jsonnode-and-objectnode

https://stackoverflow.com/questions/32713109/how-to-convert-jsonnode-to-objectnode

https://github.com/codehaus/jackson/blob/master/src/java/org/codehaus/jackson/JsonNode.java

https://stackoverflow.com/questions/38705890/what-is-the-difference-between-objectnode-and-jsonnode-in-jackson

https://github.com/FasterXML/jackson-modules-java8

https://stackoverflow.com/questions/27952472/serialize-deserialize-java-8-java-time-with-jackson-json-mapper