import java.awt.BasicStroke;  import java.awt.Color;  import java.io.FileOutputStream;  import java.io.IOException;  import java.text.DateFormat;  import java.text.SimpleDateFormat;     import javax.servlet.ServletException;  import javax.servlet.ServletRequest;  import javax.servlet.ServletResponse;  import javax.servlet.http.HttpServlet;     import org.jfree.data.category.CategoryDataset;  import org.jfree.data.category.DefaultCategoryDataset;  import org.jfree.data.general.DefaultPieDataset;  import org.jfree.data.time.Day;  import org.jfree.data.time.TimeSeries;  import org.jfree.data.time.TimeSeriesCollection;  import org.jfree.data.xy.XYDataset;  import org.jfree.chart.*;  import org.jfree.chart.axis.CategoryAxis;  import org.jfree.chart.axis.DateAxis;  import org.jfree.chart.axis.DateTickUnit;  import org.jfree.chart.axis.DateTickUnitType;  import org.jfree.chart.axis.ValueAxis;  import org.jfree.chart.plot.CategoryPlot;  import org.jfree.chart.plot.PiePlot;  import org.jfree.chart.plot.PlotOrientation;  import org.jfree.chart.plot.XYPlot;  import org.jfree.chart.renderer.category.LineAndShapeRenderer;  import org.jfree.chart.servlet.ServletUtilities;  import org.jfree.chart.title.TextTitle;  import com.lowagie.text.Font;        import demo.BarChart3DDemo1;        /**   * Servlet implementation class ChartDemoServlet   */  public class ChartDemoServlet extends HttpServlet {   private static final long serialVersionUID = 1L;      public ChartDemoServlet() {          super();          // TODO Auto-generated constructor stub      }               public void service(ServletRequest request, ServletResponse response) throws ServletException, IOException{              response.setContentType("image/jpeg");       DefaultPieDataset data = getDataSet();       CategoryDataset dataset = getDataSet2();       DefaultCategoryDataset linedataset = createDataset();           //JFreeChart chart = ChartFactory.createPieChart3D("水果产量图", data, true, false, false);           /**    JFreeChart chart = ChartFactory.createBarChart3D(                  "水果产量图", // 图表标题                  "水果", // 目录轴的显示标签                  "产量", // 数值轴的显示标签                  dataset, // 数据集      PlotOrientation.VERTICAL, // 图表方向：水平、垂直      true,  // 是否显示图例(对于简单的柱状图必须是 false)      false, // 是否生成工具      false  // 是否生成 URL 链接      );    **/           JFreeChart chart = ChartFactory.createLineChart(      "折线图", // 图表标题         "时间", // 横轴显示标签         "销售额(百万)", // 纵轴显示标签         linedataset, // 数据集         PlotOrientation.VERTICAL, // 图表方向：水平、垂直         true, // 是否显示图例标识(对于简单的柱状图必须是 false)         true, // 是否生成工具         false // 是否生成 URL 链接         );           /*    JFreeChart chart=ChartFactory.createTimeSeriesChart(      "编程词典全国销量统计"      , "销售月份"      , "销量（份）"      , createtimedata()      , false      , false      , false      );    */    /*     * jfreechart1.0.13生成的图片中，中文都以方框形式显示,中文乱码解决如下（包括：饼图、柱状图、时序图、折线图）。     */    /***设置饼图相关属性***/    /*    PiePlot pieplot = (PiePlot) chart.getPlot();//获取饼图区域对象。    pieplot.setLabelFont(new java.awt.Font("宋体",0,12));    pieplot.setNoDataMessage("无数据显示"); //没有数据的时候显示的内容    pieplot.setCircular(false);    pieplot.setLabelGap(0.02D);    TextTitle txtTitle = null;    txtTitle = chart.getTitle();    java.awt.Font font = new java.awt.Font("宋体", Font.BOLD, 16);    txtTitle.setFont(font);//解决标题中文乱码    chart.getLegend().setItemFont(font);    chart.setBackgroundPaint(new Color(232,232,232));//设定背景    pieplot.setBackgroundPaint(Color.white); //设定图表数据显示部分背景色    */        /***设置柱状图、折线图相关属性***/        CategoryPlot catplot=chart.getCategoryPlot();  //获取柱状图、折线图区域对象。    CategoryAxis domainAxis=catplot.getDomainAxis();    catplot.setNoDataMessage("无数据显示");//没有数据的时候显示的内容    //列表标题    TextTitle txtTitle = null;    txtTitle = chart.getTitle();    txtTitle.setFont(new java.awt.Font("黑体",Font.BOLD,14));    //水平底部列表       domainAxis.setLabelFont(new java.awt.Font("黑体",Font.BOLD,14));       //水平底部标题       domainAxis.setTickLabelFont(new java.awt.Font("宋体",Font.BOLD,12));       //垂直标题       ValueAxis rangeAxis=catplot.getRangeAxis();//获取柱状       rangeAxis.setLabelFont(new java.awt.Font("黑体",Font.BOLD,15));       chart.getLegend().setItemFont(new java.awt.Font("黑体", Font.BOLD, 15));       //获得renderer       LineAndShapeRenderer lineAndShapeRenderer =(LineAndShapeRenderer)catplot.getRenderer();       lineAndShapeRenderer.setShapesVisible(true); //series 点（即数据点）可见       /*       lineAndShapeRenderer.setSeriesStroke(0, new BasicStroke(2.0F, 1, 1, 1.0F, new float[] {         10F, 6F         }, 0.0F)); //这里是虚线，默认是直线       */                  /***设置时序图相关属性***/    /**       XYPlot xyplot = (XYPlot) chart.getPlot();//获取时序图区域对象。       //列表标题    TextTitle txtTitle = null;    txtTitle = chart.getTitle();    txtTitle.setFont(new java.awt.Font("黑体",Font.BOLD,15));       //纵轴字体       xyplot.getRangeAxis().setLabelFont(new java.awt.Font("宋体", Font.BOLD, 12));       //横轴框里的标题字体:显示图例       //chart.getLegend().setItemFont(new java.awt.Font("宋体", Font.ITALIC, 12));       //横轴列表字体       xyplot.getDomainAxis().setTickLabelFont(new java.awt.Font("新宋体", 1, 12));       //横轴小标题字体       xyplot.getDomainAxis().setLabelFont(new java.awt.Font("新宋体", 1, 12));       chart.setBackgroundPaint(new Color(252,175,134)); //设置背景色       xyplot.setDomainGridlinesVisible(false);  //设置网格不显示              //获取时间轴对象       DateAxis dateAxis = (DateAxis) xyplot.getDomainAxis();       //dateAxis.setLabelFont(new java.awt.Font("黑体", Font.ITALIC , 18));   //设置时间轴字体       dateAxis.setLowerMargin(0.0);//设置时间轴上显示的最小值       DateFormat format = new SimpleDateFormat("MM月份");   //创建日期格式对象       //创建DateTickUnit对象       DateTickUnit dtu = new DateTickUnit(DateTickUnitType.DAY,29,format);       dateAxis.setTickUnit(dtu);//设置日期轴的日期标签       **/              //chart.getTitle().setFont(new java.awt.Font("宋体", Font.BOLD, 15));       //chart.getLegend().setItemFont(new java.awt.Font("黑体", Font.BOLD, 15));       //CategoryAxis domainAxis = plot.getDomainAxis();         /*------设置X轴坐标上的文字-----------*/       //domainAxis.setTickLabelFont(new java.awt.Font("黑体", Font.PLAIN, 11));         /*------设置X轴的标题文字------------*/       //domainAxis.setLabelFont(new java.awt.Font("宋体", Font.PLAIN, 12));         //NumberAxis numberaxis = (NumberAxis) plot.getRangeAxis();         /*------设置Y轴坐标上的文字-----------*/       //numberaxis.setTickLabelFont(new java.awt.Font("黑体", Font.PLAIN, 12));         /*------设置Y轴的标题文字------------*/       //numberaxis.setLabelFont(new java.awt.Font("黑体", Font.PLAIN, 12));               FileOutputStream fos_jpg=null;    try{     fos_jpg=new FileOutputStream("D:\\ok_bing.jpg");     /*      * 第二个参数如果为100，会报异常：      * java.lang.IllegalArgumentException: The 'quality' must be in the range 0.0f to 1.0f      * 限制quality必须小于等于1,把100改成 0.1f。      */     ChartUtilities.writeChartAsJPEG(fos_jpg, 0.99f, chart, 600, 300, null);              }catch(Exception e){     System.out.println("[e]"+e);    }finally{     try{      fos_jpg.close();     }catch(Exception e){           }    }              }       /**    * 获取一个演示用的简单数据集对象    * @return    */      //生成饼图数据   private static DefaultPieDataset getDataSet() {    DefaultPieDataset dataset = new DefaultPieDataset();    dataset.setValue("苹果",100);    dataset.setValue("梨子",200);    dataset.setValue("葡萄",300);    dataset.setValue("香蕉",400);    dataset.setValue("荔枝",500);    return dataset;   }   //生成柱状图数据   private static CategoryDataset getDataSet2() {    DefaultCategoryDataset dataset = new DefaultCategoryDataset();          dataset.addValue(100, "北京", "苹果");          dataset.addValue(100, "上海", "苹果");          dataset.addValue(100, "广州", "苹果");          dataset.addValue(200, "北京", "梨子");          dataset.addValue(200, "上海", "梨子");          dataset.addValue(200, "广州", "梨子");          dataset.addValue(300, "北京", "葡萄");          dataset.addValue(300, "上海", "葡萄");          dataset.addValue(300, "广州", "葡萄");          dataset.addValue(400, "北京", "香蕉");          dataset.addValue(400, "上海", "香蕉");          dataset.addValue(400, "广州", "香蕉");          dataset.addValue(500, "北京", "荔枝");          dataset.addValue(500, "上海", "荔枝");          dataset.addValue(500, "广州", "荔枝");          return dataset;   }       //生成折线图数据    public static DefaultCategoryDataset createDataset() {     DefaultCategoryDataset linedataset = new DefaultCategoryDataset();     //  各曲线名称     String series1 = "冰箱";     String series2 = "彩电";     String series3 = "洗衣机";        //横轴名称(列名称)     String type1 = "1月";     String type2 = "2月";     String type3 = "3月";     String type4 = "4月";     String type5 = "5月";        linedataset.addValue(0.0, series1, type1);     linedataset.addValue(4.2, series1, type2);     linedataset.addValue(3.9, series1, type3);     linedataset.addValue(3.2, series1, type4);     linedataset.addValue(3.0, series1, type5);        linedataset.addValue(1.0, series2, type1);     linedataset.addValue(5.2, series2, type2);     linedataset.addValue(7.9, series2, type3);     linedataset.addValue(8.9, series2, type4);     linedataset.addValue(9.2, series2, type5);        linedataset.addValue(2.0, series3, type1);     linedataset.addValue(9.2, series3, type2);     linedataset.addValue(8.9, series3, type3);     linedataset.addValue(9.9, series3, type4);     linedataset.addValue(10.9, series3, type5);        return linedataset;    }       //生成时序图数据    public static XYDataset createtimedata() {    //实例化TimeSeries对象     TimeSeries timeseries = new TimeSeries("Data");     Day day = new Day(1, 1, 2008);  //实例化Day     double d = 3000D;//添加一年365天的数据     for (int i = 0; i < 365; i++) {      d = d + (Math.random() - 0.5) * 10; //创建随机数据      timeseries.add(day, d); //向数据集合中添加数据      day = (Day) day.next();     }     //创建TimeSeriesCollection集合对象     TimeSeriesCollection timeSeriesCollection =new TimeSeriesCollection(timeseries);     //返回数据集合对象     return timeSeriesCollection;    }      }