JFreeChart来显示一个XML文件

通过JFreeChart来显示以下的XML文件：

<chart caption="Sales - 2012 v 2013" numberprefix="$" plotgradientcolor="" bgcolor="FFFFFF" showalternatehgridcolor="0" divlinecolor="CCCCCC" showvalues="0" showcanvasborder="0" canvasborderalpha="0" canvasbordercolor="CCCCCC" canvasborderthickness="1" yaxismaxvalue="30000" captionpadding="30" linethickness="3" yaxisvaluespadding="15" legendshadow="0" legendborderalpha="0" palettecolors="#f8bd19,#008ee4,#33bdda,#e44a00,#6baa01,#583e78" showborder="0">
<categories>
<category label="Jan" />
<category label="Feb" />
<category label="Mar" />
<category label="Apr" />
<category label="May" />
<category label="Jun" />
<category label="Jul" />
<category label="Aug" />
<category label="Sep" />
<category label="Oct" />
<category label="Nov" />
<category label="Dec" />
</categories>
<dataset seriesname="2013">
<set value="22400" />
<set value="24800" />
<set value="21800" />
<set value="21800" />
<set value="24600" />
<set value="27600" />
<set value="26800" />
<set value="27700" />
<set value="23700" />
<set value="25900" />
<set value="26800" />
<set value="24800" />
</dataset>
<dataset seriesname="2012">
<set value="10000" />
<set value="11500" />
<set value="12500" />
<set value="15000" />
<set value="16000" />
<set value="17600" />
<set value="18800" />
<set value="19700" />
<set value="21700" />
<set value="21900" />
<set value="22900" />
<set value="20800" />
</dataset>
</chart>

实现代码如下：

package com.oracle;
 
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Polygon;
import java.awt.Shape;
import java.awt.geom.Rectangle2D;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.List;
 
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.DefaultDrawingSupplier;
import org.jfree.chart.plot.DrawingSupplier;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.LineAndShapeRenderer;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;
 
//参见http://xuehu2009.iteye.com/blog/480387
 
public class Test3 extends ApplicationFrame {
 
	private static List<String> month = new ArrayList<String>();
	private static List<Integer> tongJi_2012 = new ArrayList<Integer>();
	private static List<Integer> tongJi_2013 = new ArrayList<Integer>();
 
	/**
	 * 画板的构造方法
	 * 
	 * @param title
	 */
	public Test3(final String title) {
		super(title);
		final CategoryDataset dataset = createDataset();
		final JFreeChart chart = createChart(dataset);
		final ChartPanel chartPanel = new ChartPanel(chart);
		chartPanel.setPreferredSize(new java.awt.Dimension(500,270));
		setContentPane(chartPanel);
 
	}
 
	/**
	 * 新建一个数据集合
	 * 
	 * @return 返回一个数据集合
	 */
	private CategoryDataset createDataset() {
		readXML();
		DefaultCategoryDataset linedataset = new DefaultCategoryDataset();
		DefaultCategoryDataset dataset = null;
		for (int i = 0; i < month.size(); i++) {
			// 用法参见：linedataset.addValue(value,rowKey,columnKey);
			linedataset.addValue(tongJi_2012.get(i),"2012",month.get(i));
			linedataset.addValue(tongJi_2013.get(i),"2013",month.get(i));
			linedataset.addValue(3000,"2014",month.get(i));
			linedataset.addValue(2000,"2015",month.get(i));
		}
		dataset = linedataset;
		return dataset;
	}
 
	/**
	 * 通过上面函数的得到的数据集合创建一个图表
	 * 
	 * @param dataset
	 * @return
	 */
	private JFreeChart createChart(final CategoryDataset dataset) {
		final JFreeChart chart = ChartFactory.createLineChart(
				"JFreechart Test",// chart title
				"Type",// 横坐标意义
				"Value",// 纵坐标意义
				dataset,// 数据集合
				PlotOrientation.VERTICAL,// orientation
				true,// include legend
				true,// tooltips
				false // urls
				);
 
		// final StandardLegend legend = (StandardLegend) chart.getLegend();
		// legend.setDisplaySeriesShapes(true);
 
		final Shape[] shapes = new Shape[3];
		int[] xpoints;
		int[] ypoints;
 
		// right-pointing triangle
		xpoints = new int[] { -3,3,-3 };
		ypoints = new int[] { -3,3 };
		shapes[0] = new Polygon(xpoints,ypoints,3);
 
		// vertical rectangle
		shapes[1] = new Rectangle2D.Double(-2,-3,6);
 
		// left-pointing triangle
		xpoints = new int[] { -3,3 };
		ypoints = new int[] { 0,3 };
		shapes[2] = new Polygon(xpoints,3);
 
		final DrawingSupplier supplier = new DefaultDrawingSupplier(
				DefaultDrawingSupplier.DEFAULT_PAINT_SEQUENCE,DefaultDrawingSupplier.DEFAULT_OUTLINE_PAINT_SEQUENCE,DefaultDrawingSupplier.DEFAULT_STROKE_SEQUENCE,DefaultDrawingSupplier.DEFAULT_OUTLINE_STROKE_SEQUENCE,shapes);
		final CategoryPlot plot = chart.getCategoryPlot();
		plot.setDrawingSupplier(supplier);
 
		chart.setBackgroundPaint(Color.white);
 
		// set the stroke for each series...
		// 设置每个线条的样式，本例中有4条线
		plot.getRenderer().setSeriesStroke(
				0,new BasicStroke(2.0f,BasicStroke.CAP_ROUND,BasicStroke.JOIN_ROUND,1.0f,new float[] { 10.0f,6.0f },// 虚线的横纵长度
						0.0f));
		plot.getRenderer().setSeriesStroke(
				1,new float[] { 6.0f,0.0f));
		plot.getRenderer().setSeriesStroke(
				2,new float[] { 2.0f,0.0f));
 
		plot.getRenderer().setSeriesStroke(
				3,BasicStroke.CAP_SQUARE,0.0f));
 
		// customise the renderer...
		final LineAndShapeRenderer renderer = (LineAndShapeRenderer) plot
				.getRenderer();
		// renderer.setDrawShapes(true);
		renderer.setItemLabelsVisible(true);
		// renderer.setLabelGenerator(new StandardCategoryLabelGenerator());
 
		// customise the range axis...
		final NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
		rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
		rangeAxis.setAutoRangeIncludesZero(false);
		rangeAxis.setUpperMargin(0.12);
		return chart;
	}
 
	/**
	 * 读XML文件
	 */
	public void readXML() {
		SAXReader saxReader = new SAXReader();
		try {
			Document doc = saxReader.read(new File("123.xml"));
			Element element = doc.getRootElement();
 
			List list = element.elements();
			for (int i = 0; i < list.size(); i++) {
				Element elementz = (Element) list.get(i);
				List list1 = elementz.elements();
				if (elementz.getName().equals("categories")) {
					for (int j = 0; j < list1.size(); j++) {
						Element elementz2 = (Element) list1.get(j);
						month.add(elementz2.attributeValue("label"));
					}
				} else if (elementz.getName().equals("dataset")) {
					if (elementz.attributeValue("seriesname").equals("2013")) {
						for (int j = 0; j < list1.size(); j++) {
							Element elementz2 = (Element) list1.get(j);
							tongJi_2013.add(Integer.parseInt(elementz2
									.attributeValue("value")));
						}
					} else if (elementz.attributeValue("seriesname").equals(
							"2012")) {
						for (int j = 0; j < list1.size(); j++) {
							Element elementz2 = (Element) list1.get(j);
							tongJi_2012.add(Integer.parseInt(elementz2
									.attributeValue("value")));
						}
					}
				}
			}
			for (int i = 0; i < month.size(); i++) {
				System.out.print(month.get(i) + " ");
				System.out.print(tongJi_2012.get(i) + " ");
				System.out.println(tongJi_2013.get(i));
			}
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
 
	public static void main(String[] args) {
		final Test3 demo = new Test3("JFreeChart Test");
		demo.pack();
		RefineryUtilities.centerFrameOnScreen(demo);
		demo.setVisible(true);
	}
 
}

结果如下图所示：

JFreeChart来显示一个XML文件

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