用JFreeChart在java中画图,解决中文乱码  

最近有学生问JFreeChart画图的中文乱码问题,只好研究研究解决了

先来点介绍:JFreeChart是一组功能强大、灵活易用的Java绘图API,使用它可以生成多种通用性的报表,包括柱状图、饼图、曲线图、甘特图等。它能够用在Swing和Web等中制作自定义的图表或报表,并且得到广泛的应用。

我把图和代码一起放上吧,一共调了3个图,这个中文显示问题是在让人头疼,JFreeChart的作者收费提供API Docs,而且还是没有搜索功能的.只能查源代码捣鼓.

1柱状图 BarChart3DDemo1 版权版权,木哈哈哈哈
效果图:

代码:

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.AxisLocation;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.DateAxis;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.labels.ItemLabelAnchor;
import org.jfree.chart.labels.ItemLabelPosition;
import org.jfree.chart.labels.StandardCategoryItemLabelGenerator;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.BarRenderer3D;
import org.jfree.chart.title.LegendTitle;
import org.jfree.chart.title.TextTitle;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.general.DatasetUtilities;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;
import org.jfree.ui.TextAnchor;

public class BarChart3DDemo1 extends ApplicationFrame {

	public BarChart3DDemo1(String title) {
		super(title);
		CategoryDataset dataset = createDataset();
		JFreeChart chart = createChart(dataset);
		ChartPanel chartPanel = new ChartPanel(chart);
		chartPanel.setFillZoomRectangle(true);
		chartPanel.setMouseWheelEnabled(true);
		chartPanel.setPreferredSize(new Dimension(500, 270));
		setContentPane(chartPanel);
	}

	private static CategoryDataset createDataset() {

		double[][] data = new double[][] { { 1310, 1220, 1110, 1000 },
				{ 720, 700, 680, 640 }, { 1130, 1020, 980, 800 },
				{ 440, 400, 360, 300 } };
		String[] rowKeys = { "猪肉", "牛肉", "鸡肉", "鱼肉" };
		String[] columnKeys = { "广州", "深圳", "东莞", "佛山" };
		CategoryDataset dataset = DatasetUtilities.createCategoryDataset(
				rowKeys, columnKeys, data);
		return dataset;

	}

	private static JFreeChart createChart(CategoryDataset dataset) {

		JFreeChart chart = ChartFactory.createBarChart3D("肉类销量统计图", "肉类", "销量",
				dataset, PlotOrientation.VERTICAL, true, true, false);

		chart.getTitle().setFont(new Font("宋体", 0, 12));
		CategoryPlot plot = chart.getCategoryPlot();
		// 设置网格背景颜色
		plot.setBackgroundPaint(Color.white);
		// 设置网格竖线颜色
		plot.setDomainGridlinePaint(Color.pink);
		// 设置网格横线颜色
		plot.setRangeGridlinePaint(Color.pink);
		// 显示每个柱的数值,并修改该数值的字体属性

		plot.getDomainAxis().setLabelFont(new Font("宋体", 0, 12));
		plot.getDomainAxis().setTickLabelFont(new Font("宋体", 0, 12));

		plot.getRangeAxis().setLabelFont(new Font("宋体", 0, 12));

		LegendTitle title = (LegendTitle) chart.getSubtitle(0);
		title.setItemFont(new Font("宋体", 0, 12));

		BarRenderer3D renderer = new BarRenderer3D();
		renderer
				.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator());
		renderer.setBaseItemLabelsVisible(true);
		// 默认的数字显示在柱子中,通过如下两句可调整数字的显示
		// 注意:此句很关键,若无此句,那数字的显示会被覆盖,给人数字没有显示出来的问题
		renderer.setBasePositiveItemLabelPosition(new ItemLabelPosition(
				ItemLabelAnchor.OUTSIDE12, TextAnchor.BASELINE_LEFT));
		renderer.setItemLabelAnchorOffset(10D);
		// 设置每个地区所包含的平行柱的之间距离
		// renderer.setItemMargin(0.3);
		plot.setRenderer(renderer);
		// 设置地区、销量的显示位置
		// 将下方的“肉类”放到上方
		plot.setDomainAxisLocation(AxisLocation.TOP_OR_RIGHT);
		// 将默认放在左边的“销量”放到右方
		plot.setRangeAxisLocation(AxisLocation.BOTTOM_OR_RIGHT);
		return chart;

	}

	public static void main(String[] args) {
		BarChart3DDemo1 demo = new BarChart3DDemo1("3D柱状图--30c.org");
		demo.pack();
		RefineryUtilities.centerFrameOnScreen(demo);
		demo.setVisible(true);
	}

}

2饼状图 PieChart3DDemo1 版权版权,木哈哈哈哈
效果图:

代码:

import java.awt.Dimension;
import java.awt.Font;

import javax.swing.JFrame;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.PiePlot;
import org.jfree.chart.plot.PiePlot3D;
import org.jfree.chart.title.LegendTitle;
import org.jfree.chart.title.TextTitle;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.general.DefaultPieDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;

public class PieChart3DDemo1 extends ApplicationFrame{


    public PieChart3DDemo1(String title) {
        super(title);
        DefaultPieDataset dataset = createDataset();
        JFreeChart chart = createChart(dataset);
        ChartPanel chartPanel = new ChartPanel(chart);
        chartPanel.setFillZoomRectangle(true);
        chartPanel.setMouseWheelEnabled(true);
        chartPanel.setPreferredSize(new Dimension(500, 270));
        setContentPane(chartPanel);
    }

    private static DefaultPieDataset createDataset() {

    	DefaultPieDataset dataset = new DefaultPieDataset();
    	 dataset.setValue("初中高级程序员", 0.55);
    	 dataset.setValue("项目经理", 0.1);
    	 dataset.setValue("系统分析师", 0.1);
    	 dataset.setValue("软件架构师", 0.1);
    	 dataset.setValue("其他", 0.2);

        return dataset;

    }

    private static JFreeChart createChart(DefaultPieDataset dataset) {

    	 JFreeChart chart = ChartFactory.createPieChart3D("", dataset, true, false, false);
    	 chart.setTitle(new TextTitle("30c.org-IT行业职业分布图"));
    	 PiePlot3D pieplot = (PiePlot3D) chart.getPlot();
    	 pieplot.setLabelFont(new Font("宋体", 0, 12));
    	 
    	 //没有数据的时候显示的内容
    	 pieplot.setNoDataMessage("无数据显示");
    	 pieplot.setCircular(false);
    	 pieplot.setLabelGap(0.02D);
    	 
    	 LegendTitle title =  (LegendTitle) chart.getSubtitle(0);
    	 title.setItemFont(new Font("宋体", 0, 12));

        return chart;

    }

    public static void main(String[] args) {
    	PieChart3DDemo1 demo = new PieChart3DDemo1("3D饼图--30c.org");
        demo.pack();
        RefineryUtilities.centerFrameOnScreen(demo);
        demo.setVisible(true);
    }

}

3折线图 LineChartDemo1 版权版权,木哈哈哈哈

效果图:

代码:

import java.awt.Color;
import java.awt.Font;
import java.text.SimpleDateFormat;

import javax.swing.JPanel;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.DateAxis;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYItemRenderer;
import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;
import org.jfree.chart.title.LegendTitle;
import org.jfree.chart.title.TextTitle;
import org.jfree.data.time.Month;
import org.jfree.data.time.TimeSeries;
import org.jfree.data.time.TimeSeriesCollection;
import org.jfree.data.xy.XYDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RectangleInsets;
import org.jfree.ui.RefineryUtilities;

public class LineChartDemo1 extends ApplicationFrame {

	public LineChartDemo1(String title) {
		super(title);
		setContentPane(createDemoPanel());
	}

	private static XYDataset createDataset() {

		TimeSeries s1 = new TimeSeries("测试线a");
		s1.add(new Month(2, 2001), 181.8);
		s1.add(new Month(3, 2001), 167.3);
		s1.add(new Month(4, 2001), 153.8);
		s1.add(new Month(5, 2001), 167.6);
		s1.add(new Month(6, 2001), 158.8);
		s1.add(new Month(7, 2001), 148.3);
		s1.add(new Month(8, 2001), 153.9);
		s1.add(new Month(9, 2001), 142.7);
		s1.add(new Month(10, 2001), 123.2);
		s1.add(new Month(11, 2001), 131.8);
		s1.add(new Month(12, 2001), 139.6);
		s1.add(new Month(1, 2002), 142.9);
		s1.add(new Month(2, 2002), 138.7);
		s1.add(new Month(3, 2002), 137.3);
		s1.add(new Month(4, 2002), 143.9);
		s1.add(new Month(5, 2002), 139.8);
		s1.add(new Month(6, 2002), 137.0);
		s1.add(new Month(7, 2002), 132.8);

		TimeSeries s2 = new TimeSeries("测试线b");
		s2.add(new Month(2, 2001), 129.6);
		s2.add(new Month(3, 2001), 123.2);
		s2.add(new Month(4, 2001), 117.2);
		s2.add(new Month(5, 2001), 124.1);
		s2.add(new Month(6, 2001), 122.6);
		s2.add(new Month(7, 2001), 119.2);
		s2.add(new Month(8, 2001), 116.5);
		s2.add(new Month(9, 2001), 112.7);
		s2.add(new Month(10, 2001), 101.5);
		s2.add(new Month(11, 2001), 106.1);
		s2.add(new Month(12, 2001), 110.3);
		s2.add(new Month(1, 2002), 111.7);
		s2.add(new Month(2, 2002), 111.0);
		s2.add(new Month(3, 2002), 109.6);
		s2.add(new Month(4, 2002), 113.2);
		s2.add(new Month(5, 2002), 111.6);
		s2.add(new Month(6, 2002), 108.8);
		s2.add(new Month(7, 2002), 101.6);
		TimeSeriesCollection dataset = new TimeSeriesCollection();
		dataset.addSeries(s1);
		dataset.addSeries(s2);

		return dataset;

	}

	private static JFreeChart createChart(XYDataset dataset) {

		JFreeChart chart = ChartFactory.createTimeSeriesChart("", // title
				"时间", // x-axis label
				"测试数据", // y-axis label
				dataset, // data
				true, // create legend?
				true, // generate tooltips?
				false // generate URLs?
				);
		chart.setTitle(new TextTitle("30c.org-行业职业分布图", new Font("宋体", 0, 12)));// 主标题中文
		chart.setBackgroundPaint(Color.white);
		LegendTitle title = (LegendTitle) chart.getSubtitles().get(0);
		title.setItemFont(new Font("宋体", 0, 12));// subtitle中文
		XYPlot plot = (XYPlot) chart.getPlot();
		plot.setBackgroundPaint(Color.lightGray);
		plot.setDomainGridlinePaint(Color.white);
		plot.setRangeGridlinePaint(Color.white);
		plot.setAxisOffset(new RectangleInsets(5.0, 5.0, 5.0, 5.0));
		plot.setDomainCrosshairVisible(true);
		plot.setRangeCrosshairVisible(true);

		XYItemRenderer r = plot.getRenderer();
		if (r instanceof XYLineAndShapeRenderer) {
			XYLineAndShapeRenderer renderer = (XYLineAndShapeRenderer) r;
			renderer.setBaseShapesVisible(true);
			renderer.setBaseShapesFilled(true);
			renderer.setDrawSeriesLineAsPath(true);
		}
		DateAxis axis = (DateAxis) plot.getDomainAxis();
		axis.setLabelFont(new Font("宋体", 0, 12));// 横轴中文
		axis.setDateFormatOverride(new SimpleDateFormat("yyyy-MM"));// 时间格式
		ValueAxis ca = plot.getRangeAxis();
		ca.setLabelFont(new Font("宋体", 0, 12));// 纵轴中文

		return chart;
	}

	public static JPanel createDemoPanel() {
		JFreeChart chart = createChart(createDataset());
		return new ChartPanel(chart);
	}

	public static void main(String[] args) {
		LineChartDemo1 demo = new LineChartDemo1("折线图Demo-30c.org");
		demo.pack();
		RefineryUtilities.centerFrameOnScreen(demo);
		demo.setVisible(true);

	}

}

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  • 评论 (5)
  1. 没有看到哪里表示解决乱码问题的啊

    • 这个代码已经是带转码的了

  2. 请教楼主,如何将这样的图通过action传给jsp呢?

    • 请注意,jfreechart只是ui绘图,可以显示效果
      跟Action有啥关系呢
      给出的例子也是在jsp中显示
      如果你说的是action传递给jsp,就跟普通传递方式一样就行了

  3. 网速越来越慢,每次编辑都提心吊胆的怕丢数据
    还有米胖的外链不是很稳定了

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