<servlet> <servlet-name>DisplayChart</servlet-name> <servlet-class>org.jfree.chart.servlet.DisplayChart</servlet-class> </servlet > <servlet-mapping> <servlet-name>DisplayChart</servlet-name> <url-pattern>/DisplayChart</url-pattern> </servlet-mapping>

public String getChart(String series[],double score[][],String type[],String name){ final int num=8; DefaultCategoryDataset defaultcategorydataset = new DefaultCategoryDataset(); for(int i=0;i<type.length;i++){  type[i]=type[i].substring(0, (type[i].length()<num)?type[i].length():num); } for(int j=0;j<series.length;j++){ int i=0; for( i=0;i<type.length;i++){ defaultcategorydataset.addValue(score[j][i], series[j], type[i]);  } } JFreeChart jfreechart = ChartFactory.createLineChart(name,null,null,defaultcategorydataset,PlotOrientation.VERTICAL,true,true,false); jfreechart.getLegend().setPosition(RectangleEdge.RIGHT); jfreechart.setBackgroundPaint(Color.white); CategoryPlot categoryplot = (CategoryPlot)jfreechart.getPlot(); categoryplot.setNoDataMessage("无数据可供显示！"); categoryplot.setBackgroundPaint(Color.white); categoryplot.setDomainGridlinesVisible(true); categoryplot.setRangeGridlinesVisible(true); categoryplot.setRangeGridlinePaint(Color.gray); categoryplot.setDomainGridlinePaint(Color.gray); categoryplot.setBackgroundAlpha(0.8f); Font font1 = new Font("黑体",Font.BOLD, 14); jfreechart.getTitle().setFont(font1); Font font3 = new Font("隶书",Font.BOLD, 12); jfreechart.getLegend().setItemFont(font3); CategoryAxis categoryaxis = categoryplot.getDomainAxis(); //  categoryaxis.setCategoryLabelPositions(CategoryLabelPositions.UP_45); categoryaxis.setMaximumCategoryLabelLines(10);//行数，根据需要自己设 categoryaxis.setMaximumCategoryLabelWidthRatio(0.5f);//每行宽度，这里设一个汉字宽 NumberAxis numberaxis = (NumberAxis)categoryplot.getRangeAxis(); numberaxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits()); numberaxis.setAutoRangeIncludesZero(true); numberaxis.setRangeWithMargins(0, 3); numberaxis.setUpperMargin(0.8);////设置最高的一个 Item 与图片顶端的距离 numberaxis.setUpperBound(3.5);//纵坐标最大值 categoryaxis.setTickLabelFont(new Font("宋体", Font.BOLD, 12)); numberaxis.setTickLabelFont(new Font("隶书", Font.BOLD, 12)); Font font2 = new Font("SimSun", Font.BOLD, 16); categoryaxis.setLabelFont(font2); numberaxis.setLabelFont(font2); categoryplot.setAxisOffset(new RectangleInsets(0D, 0D,0D, 10D));//设置曲线图与xy轴的距离 LineAndShapeRenderer lineandshaperenderer = (LineAndShapeRenderer)categoryplot.getRenderer(); lineandshaperenderer.setShapesVisible(true); //数据点可见 lineandshaperenderer.setSeriesStroke(0, new BasicStroke(2.0F, 1, 1, 1.0F, new float[] { 10F, 6F }, 0.0F)); //定义series点之间的连线 ，这里是虚线，默认是直线 lineandshaperenderer.setSeriesStroke(1, new BasicStroke(2.0F, 1, 1, 1.0F, new float[] { 6F, 6F }, 0.0F)); lineandshaperenderer.setBaseItemLabelsVisible(true); lineandshaperenderer.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator()); ChartRenderingInfo info=new ChartRenderingInfo(new StandardEntityCollection()); String fileName = null; try { fileName = ServletUtilities.saveChartAsPNG(jfreechart, 700,300, info, null);//生成图片 } catch (IOException e) { e.printStackTrace(); } String graphURL = "/projectname/DisplayChart?filename=" + fileName; //projectname为对应项目的路径path,一般就是项目名称 //jsp中这样使用： String graphURL = request.getContextPath() + "/servlet/DisplayChart?filename=" + filename; return graphURL;//返回生成图片的地址 }

　　 getChart(stus,score_field,type,"总分图");