qaamishra / jackson2

Jackson2

This project talks about how to convert the json from (String,URL,File) to Java object and vice versa.

To convert a json to java pojo use the below websites : #1: http://pojo.sodhanalibrary.com/ #2: http://www.jsonschema2pojo.org/

Tip : If you have hybrid data in the key while filling the map use key a object type Map<String, Object> Later on while fetching you can always typecast the object to required type e.g. ArrayList list = (ArrayList) map.get("subjects");

For Json array viewing http://jsonviewer.stack.hu/ http://www.jsoneditoronline.org/

More : http://www.baeldung.com/jackson

XML tips
1.Declare the start of XML of root element with annotation @JacksonXmlRootElement(localName = "root")
2.All the nodes which are array declare it with annotation @JacksonXmlElementWrapper(localName = "elements", useWrapping = false)
3.Declare all the nodes with the annotation @JacksonXmlProperty(localName = "element")