Spring MVC Chart from XML Data

Download Spring MVC Chart Samples 
<!--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 dataPoints = [];

var chart = new CanvasJS.Chart("chartContainer", {
	theme: "dark2",
	title: {
		text: "Website Traffic Source"
	},
	legend: {
		horizontalAlign: "right",
		verticalAlign: "center"
	},
	data: [{
		type: "pie",
		showInLegend: true,
		legendText: "{label}",
		indexLabel: "{y}",
		indexLabelPlacement: "inside",
		yValueFormatString: "#,###\"%\"",
		dataPoints: dataPoints
	}]
});

$.get("/CanvasJS_Spring_MVC_Charts/restfull-service/website-traffic-source.xml", function(data) {
	$(data).find("point").each(function() {
		var $dataPoint = jQuery(this);
		var label = $dataPoint.find("label").text();
		var y = $dataPoint.find("y").text();
		dataPoints.push({
			label: label,
			y: parseFloat(y)
		});

	});
	chart.render();
});

}
</script>
</head>
<body>
	<div id="chartContainer" style="height: 370px; width: 100%;"></div>
	<script src="https://canvasjs.com/assets/script/jquery-1.11.1.min.js"></script>
	<script src="https://cdn.canvasjs.com/canvasjs.min.js"></script>
</body>
</html>                              
//CanvasjsChartController.java
package com.canvasjs.chart.controllers;

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

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

	@RequestMapping(method = RequestMethod.GET)
	public String springMVC(ModelMap modelMap) {
		return "chart";
	}

}


//RestController.java
package com.canvasjs.chart.controllers;

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

import java.io.PrintWriter;

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.canvasjs.chart.services.CanvasjsChartService;

@Controller
@RequestMapping(value = "/restfull-service")
public class RestController extends HttpServlet {
	private static final long serialVersionUID = 1L;
	
	@Autowired
	private CanvasjsChartService canvasjsChartService;
	
	@RequestMapping(value = "/website-traffic-source.xml", method = RequestMethod.GET)
	public void getDataPoints(HttpServletRequest request, HttpServletResponse response) throws Exception {
		PrintWriter out = response.getWriter();
		
		response.setContentType("text/xml");
		response.setHeader("Content-type: text/xml;", " charset=utf-8");		
		out.println(canvasjsChartService.getCanvasjsChartData());
	}
	
}                        
//CanvasjsChartService.java
package com.canvasjs.chart.services;

public interface CanvasjsChartService {

	String getCanvasjsChartData();

}


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

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 String getCanvasjsChartData() {
		return canvasjsChartDao.getCanvasjsChartData();
	}

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

public interface CanvasjsChartDao {

	String getCanvasjsChartData();

}


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

import com.canvasjs.chart.data.CanvasjsChartData;

public class CanvasjsChartDaoImpl implements CanvasjsChartDao {
	
	@Override
	public String getCanvasjsChartData() {
		return CanvasjsChartData.getCanvasjsDataList();
	}

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

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.net.URL;
import java.nio.charset.Charset;

public class CanvasjsChartData {

	static String xml = null;

	static {

		try {
			xml = readXMLFromUrl("https://canvasjs.com/data/gallery/spring-mvc/website-traffic-source.xml");
		} catch (Exception e) {
			e.printStackTrace();
		}

	}

	private static String readAll(Reader rd) throws IOException {
		StringBuilder sb = new StringBuilder();
		int cp;
		while ((cp = rd.read()) != -1) {
			sb.append((char) cp);
		}
		return sb.toString();
	}

	public static String readXMLFromUrl(String url) throws IOException {
		InputStream is = new URL(url).openStream();
		try {
			BufferedReader rd = new BufferedReader(new InputStreamReader(is, Charset.forName("UTF-8")));
			String xmlText = readAll(rd);
			return xmlText;
		} finally {
			is.close();
		}
	}

	public static String getCanvasjsDataList() {
		return xml;
	}
}