how to serialize class?

Question

When I insert a List into mongodb, there is a problem:

Exception in thread \"main\" java.lang.IllegalArgumentException: can\'t serialize class mongodb.Person         


        

Answer 1

Your Person class definition needs to have implements Serializable in order for it to be serialized, e.g.:

class Person implements Serializable {
   //Rest here
}

Here are some useful links on Java object serialization: Link, Link.

Answer 2

The problem here not in "implements Serializable". The problem is that object not converted in the DBObject.

Possible solution:

import com.fasterxml.jackson.databind.ObjectMapper;
import com.mongodb.*;

....

ObjectMapper mapper = new ObjectMapper();
DBObject dboJack = mapper.convertValue(new Person("Jack"), BasicDBObject.class);
...