How to parse JSON data without key names into a Java class structure?

Question

I successfully followed the example Simple Spring code to parse JSON into a Java class structure using Jackson.

Now i am looking for a hint how to do the same for JSON data without key names, e.g.

{
    "10869918": {
        "BRANCH": "Dienstleistungen", 
        "SECTOR": "Diverse"
    }, 
    "12254991": {
        "BRANCH": "Luft- und Raumfahrtindustrie", 
        "SECTOR": "Logistik"
    }, 
    "12302743": {
        "BRANCH": "Touristik und Freizeit", 
        "SECTOR": "Medien/Freizeit"
    }
}

@JamesB I think OP referes to the fact that the keys, like 10869918, cannot be the name of any attribute in a bean. The only option here is a Map<String,Map<String,String>> — Pablo Lozano
– Pablo Lozano, Commented Jul 7, 2014 at 14:17
What does the POJO look like that you are trying to map this json to? — Michael Wiles
– Michael Wiles, Commented Jul 7, 2014 at 14:47
I only have the JSON data and try to create suitable POJOs which match the data using Spring-Roo as rapid prototyping tool. The actual data set is more complex then the excerpt shown above. — rmv
– rmv, Commented Jul 7, 2014 at 15:05

Thomas · Accepted Answer · 2014-07-07 14:11:49Z

2

I doubt this is possible with a POJO-JSON mapper. You could use libraries like json-simple to parse the JSON string into Java objects (which basically are maps and lists) and access values like "10869918" by reading the keys of those maps.

answered Jul 7, 2014 at 14:11

Thomas

88.9k13 gold badges127 silver badges162 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Gimby Over a year ago

My idea exactly; don't map to an object, map to a collection instead. The data itself seems to represent a hashtable of sorts anyway, so it would be pretty strange to want to map that to a POJO.

Collectives™ on Stack Overflow

How to parse JSON data without key names into a Java class structure?

1 Answer 1

1 Comment

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Linked

Related