Combination of Spring MVC Range Spline Area & Spline Charts

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<!-- chart.jsp-->
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
	pageEncoding="ISO-8859-1"%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<script type="text/javascript">
window.onload = function() {
	
var dps = [[]];
var chart = new CanvasJS.Chart("chartContainer", {
	theme: "light2", // "light1", "dark1", "dark2"
	title: {
		text: "Average & High/Low Temperature - London 2017"
	},
	axisY: {
		title: "Temperature",
		suffix: " °C"		
	},
	legend:{
	cursor: "pointer",
		itemclick: toggleDataSeries
	},
	toolTip: {
		shared: true
	},
	data: [{
		type: "rangeSplineArea",
		name: "High/Low Temperature",
		showInLegend: true,
		xValueType: "dateTime",
		xValueFormatString: "MMM YYYY",
		yValueFormatString: "#,##0 °C",
		markerSize: 0,
		toolTipContent: "<b>{x}<br></b><span style=\"color:#6D78AD\">{name}</span>: {y[0]} to {y[1]}",
		dataPoints: dps[0]
	}]
});


var yValue;
var xValue;

<c:forEach items="${dataPointsList}" var="dataPoints" varStatus="loop">
	<c:forEach items="${dataPoints}" var="dataPoint">
		yValue = [parseFloat("${dataPoint.y[0]}"), parseFloat("${dataPoint.y[1]}")];
		xValue = parseFloat("${dataPoint.x}");		
		dps[parseInt("${loop.index}")].push({
			x : xValue,
			y : yValue,
		});
	</c:forEach>
</c:forEach>

chart.render();
findAverage(chart);

function findAverage(chart){
	var dataPoints = [];
	var sum, avg;
	for(var i = 0; i < chart.data[0].dataPoints.length; i++){
	sum = 0;
	for(var j = 0; j < chart.data[0].dataPoints[i].y.length; j++){
			sum += chart.data[0].dataPoints[i].y[j];
		}
		avg = sum / chart.data[0].dataPoints[i].y.length;
		dataPoints.push({
			x: chart.data[0].dataPoints[i].x,
			y: avg
		});
	}
	var dataSeries = {
		type: "spline",
		name: "Average Temperature",
		showInLegend: true,
		xValueType: "dateTime",
		yValueFormatString: "#,##0.0# °C",
		markerSize: 0,
		toolTipContent: "<span style=\"color:#51CDA0\">{name}</span>: {y}",
		dataPoints: dataPoints
	}
	chart.addTo("data", dataSeries);
}

function toggleDataSeries(e){
	if (typeof(e.dataSeries.visible) === "undefined" || e.dataSeries.visible) {
		e.dataSeries.visible = false;
	}
	else{
		e.dataSeries.visible = true;
	}
	chart.render();
}

}
</script>
</head>
<body>
	<div id="chartContainer" style="height: 370px; width: 100%;"></div>
	<script src="https://cdn.canvasjs.com/canvasjs.min.js"></script>
</body>
</html>                              
//CanvasjsChartController.java
package com.canvasjs.chart.controllers;

import java.util.List;
import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import com.canvasjs.chart.services.CanvasjsChartService;

@Controller
@RequestMapping("/canvasjschart")
public class CanvasjsChartController {

	@Autowired
	private CanvasjsChartService canvasjsChartService;

	@RequestMapping(method = RequestMethod.GET)
	public String springMVC(ModelMap modelMap) {
		List<List<Map<Object, Object>>> canvasjsDataList = canvasjsChartService.getCanvasjsChartData();
		modelMap.addAttribute("dataPointsList", canvasjsDataList);
		return "chart";
	}

}                        
//CanvasjsChartService.java
package com.canvasjs.chart.services;

import java.util.List;
import java.util.Map;

public interface CanvasjsChartService {

	List<List<Map<Object, Object>>> getCanvasjsChartData();

}


//CanvasjsChartServiceImpl.java
package com.canvasjs.chart.services;

import java.util.List;
import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;

import com.canvasjs.chart.daos.CanvasjsChartDao;

public class CanvasjsChartServiceImpl implements CanvasjsChartService {

	@Autowired
	private CanvasjsChartDao canvasjsChartDao;

	public void setCanvasjsChartDao(CanvasjsChartDao canvasjsChartDao) {
		this.canvasjsChartDao = canvasjsChartDao;
	}

	@Override
	public List<List<Map<Object, Object>>> getCanvasjsChartData() {
		return canvasjsChartDao.getCanvasjsChartData();
	}

}                        
//CanvasjsChartDao.java
package com.canvasjs.chart.daos;

import java.util.List;
import java.util.Map;

public interface CanvasjsChartDao {

	List<List<Map<Object, Object>>> getCanvasjsChartData();

}

//CanvasjsChartDaoImpl.java
package com.canvasjs.chart.daos;

import java.util.List;
import java.util.Map;

import com.canvasjs.chart.data.CanvasjsChartData;

public class CanvasjsChartDaoImpl implements CanvasjsChartDao {

	@Override
	public List<List<Map<Object, Object>>> getCanvasjsChartData() {
		return CanvasjsChartData.getCanvasjsDataList();
	}

}                        
//CanvasjsChartData.java
package com.canvasjs.chart.data;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class CanvasjsChartData {

	static Map<Object,Object> map = null;
	static List<List<Map<Object,Object>>> list = new ArrayList<List<Map<Object,Object>>>();
	static List<Map<Object,Object>> dataPoints1 = new ArrayList<Map<Object,Object>>();
	
	static {
		map = new HashMap<Object,Object>(); map.put("x", 1483209000000L); map.put("y", new Integer[] {3,6});dataPoints1.add(map);
		map = new HashMap<Object,Object>(); map.put("x", 1485887400000L); map.put("y", new Integer[] {3,7});dataPoints1.add(map);
		map = new HashMap<Object,Object>(); map.put("x", 1488306600000L); map.put("y", new Integer[] {4,10});dataPoints1.add(map);
		map = new HashMap<Object,Object>(); map.put("x", 1490985000000L); map.put("y", new Integer[] {6,13});dataPoints1.add(map);
		map = new HashMap<Object,Object>(); map.put("x", 1493577000000L); map.put("y", new Integer[] {9,17});dataPoints1.add(map);
		map = new HashMap<Object,Object>(); map.put("x", 1496255400000L); map.put("y", new Integer[] {12,20});dataPoints1.add(map);
		map = new HashMap<Object,Object>(); map.put("x", 1498847400000L); map.put("y", new Integer[] {14,22});dataPoints1.add(map);
		map = new HashMap<Object,Object>(); map.put("x", 1501525800000L); map.put("y", new Integer[] {14,21});dataPoints1.add(map);
		map = new HashMap<Object,Object>(); map.put("x", 1504204200000L); map.put("y", new Integer[] {12,19});dataPoints1.add(map);
		map = new HashMap<Object,Object>(); map.put("x", 1506796200000L); map.put("y", new Integer[] {9,14});dataPoints1.add(map);
		map = new HashMap<Object,Object>(); map.put("x", 1509474600000L); map.put("y", new Integer[] {6,10});dataPoints1.add(map);
		map = new HashMap<Object,Object>(); map.put("x", 1512066600000L); map.put("y", new Integer[] {3,7});dataPoints1.add(map);	
		
		list.add(dataPoints1);
	}

	public static List<List<Map<Object, Object>>> getCanvasjsDataList() {
		return list;
	}
}