How to show informations in graphs using jsp and CanvasJS?

Question

I need to draw graphs with my sql server data .

So I have my servlet that select all data I need and transform it to json , then I forward all data to my jsp.

what I want is to show information like names in my pie graph .

this is my servlet :

PreparedStatement ps = c.prepareStatement("select SUM(ChiffreAffaire)as CA,M500_NOM from V502_client where Annee=?  and Mois=2 group by M500_NOM");
            ps.setString(1, name);
            ResultSet resultSet = ps.executeQuery();

    while(resultSet.next()){
        yVal = resultSet.getFloat("CA");
                nom=resultSet.getString("M500_NOM");
        map = new HashMap<Object,Object>(); map.put("x", nom);map.put("y",yVal); list.add(map);
        dataPoints = gsonObj.toJson(list);
    }  

            request.getSession().setAttribute("data", dataPoints); 
            RequestDispatcher rd = request.getRequestDispatcher("graph.jsp");
            rd.forward(request, response); 

and this is the script to show my graph :

<script type="text/javascript">
<%     String shared1 = (String)request.getSession().getAttribute("data");%>

window.onload = function() { 


var chart = new CanvasJS.Chart("chartContainer", {
    animationEnabled: true,
    exportEnabled: true,
    title: {
        text: "Représentation graphique"
    },
    data: [{
        type: "pie", //change type to bar, line, area, pie, etc
        showInLegend: "true",
        startAngle: 40,
        dataPoints: <%out.print(shared1);%>
    }]
});
chart.render();
}
</script>
<div id="chartContainer" style="height:370px; width:600px;"></div>

The result of this is shown like :

I want to be like this :

Answer 1

Try to define legendText on your dataset and indicate, which property contains the label ('x' in your case).

data: [{
    type: "pie", 
    showInLegend: true,
    legendText: "{x}", 
    startAngle: 40,
    dataPoints: <%out.print(shared1);%>
}]

Please note that every label (x property) should be different for a pie chart.