import java.awt.BasicStroke; import java.awt.Color; import java.awt.Font; import java.io.File; import java.io.IOException; import java.io.PrintWriter; import javax.servlet.http.HttpSession; import oracle.jrockit.jfr.openmbean.JFRStatsType; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartRenderingInfo; import org.jfree.chart.ChartUtilities; import org.jfree.chart.JFreeChart; import org.jfree.chart.axis.CategoryAxis; import org.jfree.chart.axis.CategoryLabelPositions; import org.jfree.chart.axis.NumberAxis; import org.jfree.chart.entity.StandardEntityCollection; import org.jfree.chart.plot.CategoryPlot; import org.jfree.chart.plot.PlotOrientation; import org.jfree.chart.renderer.category.LineAndShapeRenderer; import org.jfree.chart.servlet.ServletUtilities; import org.jfree.chart.title.LegendTitle; import org.jfree.data.category.DefaultCategoryDataset; import org.jfree.ui.RectangleEdge; public class ChartTest { public static void main(String[] args){ ChartTest test=new ChartTest(); test.generateFile(test.getChart()); } public JFreeChart getChart(){ String series1 ="First"; String series2 ="Second"; String type1 ="Type 1"; String type2 ="Type 2"; String type3 ="Type 3"; String type4 ="Type 4"; String type5 ="Type 5"; String type6 ="Type 6"; String type7 ="Type 7"; DefaultCategoryDataset defaultcategorydataset = new DefaultCategoryDataset(); defaultcategorydataset.addValue(1.0D, series1, type1); defaultcategorydataset.addValue(4D, series1, type2); defaultcategorydataset.addValue(3D, series1, type3); defaultcategorydataset.addValue(5D, series1, type4); defaultcategorydataset.addValue(5D, series1, type5); defaultcategorydataset.addValue(7D, series1, type6); defaultcategorydataset.addValue(7D, series1, type7); defaultcategorydataset.addValue(5D, series2, type1); defaultcategorydataset.addValue(7D, series2, type2); defaultcategorydataset.addValue(6D, series2, type3); defaultcategorydataset.addValue(8D, series2, type4); defaultcategorydataset.addValue(4D, series2, type5); defaultcategorydataset.addValue(4D, series2, type6); defaultcategorydataset.addValue(2D, series2, type7); JFreeChart jfreechart = ChartFactory.createLineChart("Line Chart Demo 1","Type","Value",defaultcategorydataset,PlotOrientation.VERTICAL,true,true,false); //  ChartFactory.createLineChart(title, categoryAxisLabel, valueAxisLabel, dataset, orientation, legend, tooltips, urls) //  上面语句legend设置为false时，表示新建的jfreechart无图例，为true时，自带图例，默认位置为底部。 jfreechart.getLegend().setPosition(RectangleEdge.RIGHT);//获取图例，设置位置 //  LegendTitle legendTitle = new LegendTitle(jfreechart.getPlot());//创建图例，若有默认的，仍然创建，此时存在两个。 //  legendTitle.setPosition(RectangleEdge.RIGHT);//设置图例的位置 //  jfreechart.addLegend(legendTitle);//图表中添加图例 jfreechart.setBackgroundPaint(Color.white);//设置图例的背景色 CategoryPlot categoryplot = (CategoryPlot)jfreechart.getPlot(); categoryplot.setBackgroundPaint(Color.lightGray); categoryplot.setDomainGridlinesVisible(true); categoryplot.setRangeGridlinesVisible(true); categoryplot.setDomainGridlinePaint(Color.white);//设置横坐标网格线 categoryplot.setRangeGridlinePaint(Color.white);//设置纵坐标网格线 // １、对标题 Font font1 = new Font("黑体",Font.BOLD, 14); // 设定字体、类型、字号 jfreechart.getTitle().setFont(font1); // 标题 // 3、下面的方块区域是 LegendTitle 对象 Font font3 = new Font("隶书",Font.BOLD, 12); // 设定字体、类型、字号 jfreechart.getLegend().setItemFont(font3);// 最下方 // 这是处理Ｐlot里面的横轴，同理可以正理竖轴 CategoryAxis categoryaxis = categoryplot.getDomainAxis(); // 横轴上的 //纵坐标换行显示 //  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 categoryaxis.setCategoryLabelPositions(CategoryLabelPositions.UP_45);// 45度倾斜,可以改成其他,默认是水平 NumberAxis numberaxis = (NumberAxis)categoryplot.getRangeAxis(); numberaxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());// 数据轴的数据标签（可以只显示整数标签，需要将AutoTickUnitSelection设false） numberaxis.setAutoRangeIncludesZero(true);//是否强制在自动选择的数据范围中包含0 categoryaxis.setTickLabelFont(new Font("SansSerif",Font.BOLD, 12));//坐标轴标尺值字体 numberaxis.setTickLabelFont(new Font("SimSun", Font.BOLD, 12));// // ２、对图里面的汉字设定,也就是Ｐlot的设定 Font font2 = new Font("SimSun", Font.BOLD, 16); // 设定字体、类型、字号 categoryaxis.setLabelFont(font2);//坐标轴标题字体 numberaxis.setLabelFont(font2);   LineAndShapeRenderer lineandshaperenderer = (LineAndShapeRenderer)categoryplot.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)); //定义series为"First"的（即series1）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)); //定义series为"Second"的（即series2）点之间的连线 return jfreechart;　　　　//返回Jfreechart } public void generateFile(JFreeChart chart){ 　　String fileName = null; 　　try { 　　　　ChartUtilities.saveChartAsJPEG(new File("C:\\PieChart.jpg"),chart,600,600); //生成图表文件到指定位置 　　} catch (IOException e) 　　{ 　　e.printStackTrace(); 　　} } public String getFileName(JFreeChart chart,HttpSession session,PrintWriter pw){ 　　String fileName = null; 　　ChartRenderingInfo info=new ChartRenderingInfo(new StandardEntityCollection()); 　　try { 　　　　fileName = ServletUtilities.saveChartAsPNG(chart, 700, 450, info, session);  //生成临时文件 　　　　ChartUtilities.writeImageMap(pw, fileName, info, false); 　　　　pw.flush(); 　　} 　　catch (IOException e) 　　{ 　　e.printStackTrace(); 　　} 　　//  String graphURL = request.getContextPath()+ "/servlet/DisplayChart?fileName=" + fileName; 　　//  request.setAttribute("fileName",fileName); 　　// request.setAttribute("graphURL",graphURL); 　　return fileName;//返回生成图片的文件名 ,传入jsp 　} }

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <%@ page import="com.chart.test.*"%> <%@ page import = "java.io.PrintWriter" %> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <% ChartTest chart=new ChartTest(); String fileName=chart.getFileName(chart.getChart(), session, new PrintWriter(out)); String graphURL = request.getContextPath() + "/DisplayChart?filename=" + fileName; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP 'JspChart.jsp' starting page</title> </head> <body> <img src="<%= graphURL %>" width=500 height=300 border=0 usemap="<%= fileName %>"> </body> </html>