Java.util.Map in the collection collection of value that is merged by the key value.

A resultmap that combines the contents of multiple maps with Java implementation

The code is roughly as follows

/** * @author shalf */public class Maputil {/*** Merge the Partmap data into the resultmap.* @param resultmap* @param partmap*/public static <t, F, K extends collection<f>> void Merge2resultmap (map<t, k> resultmap, Map<t, k> Partmap) {For (Entry<t, k> entry:partMap.entrySet ()) {T key = Entry.getkey ();if (Resultmap.containskey (key)) {Resultmap.get (Key). AddAll (Entry.getvalue ());} else {Resultmap.putall (PARTMAP);}}}}

Mainly involves the use of multiple generics, this tool class can be implemented to the PARTMAP data in the form of key to merge into the Resultmap collection
The collection.

Java.util.Map in the collection collection of value that is merged by the key value.