how to insert a hashMap into excel to draw a graph

I have a hashMap in java in terms of some keys which each key is indicating a flow. Then each value showing statics about each packet belongs to that flow.

What I need to do is, to draw graphs for each flow based on t开发者_开发问答hose values. for example:

Flow1: {[length, time],[],[],...}
Flow2: {[length, time],[length, time],[],...}

I need to plot them in Excel. Can anyone has the idea to give me some clues please?

Have you looked at Apache POI ?

Or the Java bindings for the Openoffice UNO ? (you run an instance of Openoffice and control it using Java)