JFreeChart 图表生成实例(饼图、柱状图、折线图、时序图)
发布时间:2020-12-15 03:18:13 所属栏目:Java 来源:网络整理
导读:今天PHP站长网 52php.cn把收集自互联网的代码分享给大家,仅供参考。 import java.awt.BasicStroke;import java.awt.Color;import java.io.FileOutputStream;import java.io.IOException;import java.text.DateFormat;imp
以下代码由PHP站长网 52php.cn收集自互联网 现在PHP站长网小编把它分享给大家,仅供参考 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 ); */ /* * 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",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",14)); //水平底部列表 domainAxis.setLabelFont(new java.awt.Font("黑体",14)); //水平底部标题 domainAxis.setTickLabelFont(new java.awt.Font("宋体",12)); //垂直标题 ValueAxis rangeAxis=catplot.getRangeAxis();//获取柱状 rangeAxis.setLabelFont(new java.awt.Font("黑体",15)); chart.getLegend().setItemFont(new java.awt.Font("黑体",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,1,1.0F,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",15)); //纵轴字体 xyplot.getRangeAxis().setLabelFont(new java.awt.Font("宋体",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",12)); //横轴小标题字体 xyplot.getDomainAxis().setLabelFont(new java.awt.Font("新宋体",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",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",15)); //chart.getLegend().setItemFont(new java.awt.Font("黑体",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",12)); //NumberAxis numberaxis = (NumberAxis) plot.getRangeAxis(); /*------设置Y轴坐标上的文字-----------*/ //numberaxis.setTickLabelFont(new java.awt.Font("黑体",12)); /*------设置Y轴的标题文字------------*/ //numberaxis.setLabelFont(new java.awt.Font("黑体",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","广州","苹果"); dataset.addValue(200,"梨子"); dataset.addValue(200,"梨子"); dataset.addValue(300,"葡萄"); dataset.addValue(300,"葡萄"); dataset.addValue(400,"香蕉"); dataset.addValue(400,"香蕉"); dataset.addValue(500,"荔枝"); dataset.addValue(500,"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,type2); linedataset.addValue(3.9,type3); linedataset.addValue(3.2,type4); linedataset.addValue(3.0,type5); linedataset.addValue(1.0,series2,type1); linedataset.addValue(5.2,type2); linedataset.addValue(7.9,type3); linedataset.addValue(8.9,type4); linedataset.addValue(9.2,type5); linedataset.addValue(2.0,series3,type1); linedataset.addValue(9.2,type2); linedataset.addValue(8.9,type3); linedataset.addValue(9.9,type4); linedataset.addValue(10.9,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(1,2008); //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; } } 以上内容由PHP站长网【52php.cn】收集整理供大家参考研究 如果以上内容对您有帮助,欢迎收藏、点赞、推荐、分享。 (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |