Gather graphs in Neo4j -

i have multiple neo4j graphs in hand, let's g1, g2 , g3. how can efficiently migrate graphs 1 graph. in graph, g1, g2 , g3 has label g1, g2 , g3 , never connect each other.

i using neo4j 2.3 3.0 considered.

thanks.

edit

ok. using spring date neo4j, hard connect multiple neo4j instances. decided put graph 1 instance , distinguish them labels. clear enough?

ok. problem solved. following things:

1. convet graphs json file.
2. read json file using java , write final graph.