JFreeChart 在struts2中显示

最新推荐文章于 2018-10-22 23:07:00 发布

dhc10000

最新推荐文章于 2018-10-22 23:07:00 发布

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分类专栏： JFreeChart

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本文介绍如何在Struts2框架中集成JFreeChart绘制柱状图，并配置Struts2来显示图表。通过创建CategoryDataset数据集并利用ChartFactory创建图表，最终通过Struts2的ChartResult展示。

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        private JFreeChart chart;

   public JFreeChart getChart() {
       return chart;
   }

   public void setChart(JFreeChart chart) {
       this.chart = chart;
   }

   public String show() {

       this.chart =createchart();
        return "success";
    }

//jfreechart创建方法

   public JFreeChart createchart()
   {
       try {

            chart = ChartFactory.createBarChart("Bar Chart Demo 1", "Category", "Value", createDataset(), PlotOrientation.VERTICAL, true, true, false);
            CategoryPlot localCategoryPlot = (CategoryPlot)chart.getPlot();
            localCategoryPlot.setDomainGridlinesVisible(true);
            localCategoryPlot.setRangeCrosshairVisible(true);
            localCategoryPlot.setRangeCrosshairPaint(Color.blue);
            NumberAxis localNumberAxis = (NumberAxis)localCategoryPlot.getRangeAxis();
            localNumberAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
            BarRenderer localBarRenderer = (BarRenderer)localCategoryPlot.getRenderer();
            localBarRenderer.setDrawBarOutline(false);
            GradientPaint localGradientPaint1 = new GradientPaint(0.0F, 0.0F, Color.blue, 0.0F, 0.0F, new Color(0, 0, 64));
            GradientPaint localGradientPaint2 = new GradientPaint(0.0F, 0.0F, Color.green, 0.0F, 0.0F, new Color(0, 64, 0));
            GradientPaint localGradientPaint3 = new GradientPaint(0.0F, 0.0F, Color.red, 0.0F, 0.0F, new Color(64, 0, 0));
            localBarRenderer.setSeriesPaint(0, localGradientPaint1);
            localBarRenderer.setSeriesPaint(1, localGradientPaint2);
            localBarRenderer.setSeriesPaint(2, localGradientPaint3);
            localBarRenderer.setLegendItemToolTipGenerator(new StandardCategorySeriesLabelGenerator("Tooltip: {0}"));
            CategoryAxis localCategoryAxis = localCategoryPlot.getDomainAxis();
            localCategoryAxis.setCategoryLabelPositions(CategoryLabelPositions.createUpRotationLabelPositions(0.5235987755982988D));

       } catch (Exception e) {
           e.printStackTrace();
       }
        return chart;
   }
//创建实验数据源
   public CategoryDataset createDataset()
   {
       String str1 = "First";
            String str2 = "Second";
            String str3 = "Third";
            String str4 = "Category 1";
            String str5 = "Category 2";
            String str6 = "Category 3";
            String str7 = "Category 4";
            String str8 = "Category 5";
            DefaultCategoryDataset localDefaultCategoryDataset = new DefaultCategoryDataset();
            localDefaultCategoryDataset.addValue(1.0D, str1, str4);
            localDefaultCategoryDataset.addValue(4.0D, str1, str5);
            localDefaultCategoryDataset.addValue(3.0D, str1, str6);
            localDefaultCategoryDataset.addValue(5.0D, str1, str7);
            localDefaultCategoryDataset.addValue(5.0D, str1, str8);
            localDefaultCategoryDataset.addValue(5.0D, str2, str4);
            localDefaultCategoryDataset.addValue(7.0D, str2, str5);
            localDefaultCategoryDataset.addValue(6.0D, str2, str6);
            localDefaultCategoryDataset.addValue(8.0D, str2, str7);
            localDefaultCategoryDataset.addValue(4.0D, str2, str8);
            localDefaultCategoryDataset.addValue(4.0D, str3, str4);
            localDefaultCategoryDataset.addValue(3.0D, str3, str5);
            localDefaultCategoryDataset.addValue(2.0D, str3, str6);
            localDefaultCategoryDataset.addValue(3.0D, str3, str7);
            localDefaultCategoryDataset.addValue(6.0D, str3, str8);
            return localDefaultCategoryDataset;

}

导入包之类的我就不说了主要的是 struts配置里要配置下

<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
        <package name="eventstatistics" extends="struts-default,jfreechart-default"
                           namespace="/eventstatistics">
        <result-types>
            <result-type name="chart" class="org.apache.struts2.dispatcher.ChartResult"></result-type>
        </result-types>
        <action name="eventstatistics" class="com.brilliance.xhsbd.view.EventStatisticsAction">
              <result name="success"   type="chart">
                   <param name="width">400</param>
                   <param name="height">300</param>
            </result>
        </action>
          </package>
</struts>

单独写了个配置文件 <include file="struts/struts-jfreechart.xml"/> 在struts.xml中引入。访问路径........./eventstatistics/eventstatistics!show.action