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  • Java报表之JFreeChart

    一、JFreeChart简介

      JFreeChart是JAVA平台上的一个开放的图表绘制类库。它完全使用JAVA语言编写,是为applications,servlets以及JSP等使用所设计。
      JFreeChart可生成饼图(pie charts)、柱状图(bar charts)、散点图(scatter plots)、时序图(time series)、甘特图(Gantt charts)等等多种图表,并且可以产生PNG和JPEG格式的输出,还可以与PDF和EXCEL关联。

    二、JFreeChart的使用

    1、加入jar包

    jcommon-1.0.13.jar
    jfreechart-1.0.10.jar

    2、创建DefaultPieDataSet对象,用来保存图表中要显示的数据

    DefaultPieDataSet dataSet = new DefaultPieDataSet();
    dataSet.setValue("男生",20);
    dataSet.setValue("女生",50);

    3、创建图表数据对应的JFreeChart对象

    JFreeChart chart = ChartFactory.createPieChart3D("男女比例图",dataSet);

    4、将图表数据写入文件

    File file = new File("pie.jpg");
    ChartUtilities.saveChartAsJPEG(file,chart,500,300);

    5、修饰

    ①.设置“标题”部分字体、风格、字号
      chart.getTitle().setFont(new Font("隶书",Font.BOLD,50));
    ②.设置“图例”部分信息"字体、风格、字号
      chart.getLegend().setItemFont(new Font("宋体",Font.PLAIN,20));
    ③.通过PiePlot对象设置绘图区信息
     

    //获取代表当前图表绘图区的PiePlot对象
      PiePlot plot = (PiePlot)chart.getPlot();
      //设置标签字体、风格、字号
      plot.setLabelFont(new Font("微软雅黑",Font.ITALIC,15));
      //设置前景色半透明
      plot.setForegroundAlpha(0.6f);
      //设置标签信息格式
      plot.setLabelGenerator(new StandardPieSectionLabelGenerator("{0},{1}/{3},{2}"));
    View Code

      0:标签本身
      1:当前标签对应的数量
      2:百分比
      3:总数量

     案例1:

    //1.
    DefaultPieDataset dataSet = new DefaultPieDataset();
    dataSet.setValue("华为", 20);
    dataSet.setValue("小米", 30);
    
    dataSet.setValue("中兴", 10);
    dataSet.setValue("锤子", 10);
    //2.
    JFreeChart chart = ChartFactory.createPieChart("手机市场占有份额", dataSet, true, true, true);
    //设置标题部分
    chart.getTitle().setFont(new Font("微软雅黑",Font.ITALIC,50));
    //设置图例部分
    chart.getLegend().setItemFont(new Font("华文新魏",Font.BOLD,40));
    //设置绘图区
    //1.获取绘图区对象
    PiePlot3D plot = (PiePlot3D)chart.getPlot();
    //2.设置绘图区字体
    plot.setLabelFont(new Font("华文新魏",Font.BOLD,40));
    //3.设置绘图区前景色透明度
    plot.setForegroundAlpha(0.6f);
    //4.设置标签信息格式
    plot.setLabelGenerator(new StandardPieSectionLabelGenerator("{0},{1}/{3},{2}"));
    
    //3.
    ChartUtilities.saveChartAsPNG(new File("1.png"), chart, 700, 500);
    View Code

     案例2:代码演示:【JFreeChart创建垂直/横向柱状报表】

          1)Java代码
            

    public class BarChart01 {
                public static String getBarChart(HttpSession session){
                    //1.构建数据集
                    DefaultCategoryDataset dataSet = new DefaultCategoryDataset();
                    
                    dataSet.addValue(510,"河南", "面食");
                    dataSet.addValue(580,"黑龙江", "大米");
                    dataSet.addValue(390,"陕西", "泡馍");
                    dataSet.addValue(420,"广东", "杂食");
                    
                    //2.用Chart工厂生成JFreeChar图表
                    JFreeChart barChart3D = ChartFactory.createBarChart3D("面食消费统计图","面食", "比例", dataSet, PlotOrientation.VERTICAL, true, true, true);
                    
                    //生成png图片
                    String chartAsPNG =null;
                    try {
                        chartAsPNG= ServletUtilities.saveChartAsPNG(barChart3D, 700, 500, null, session);
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                    return chartAsPNG;
                }
            }
    View Code

          2)在web.xml文件中配置如下:

    <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>
    View Code

             3)index.jsp页面【需要注意的是:参数名必须是filename】

    <body>
    <%
    String fileName = BarChart01.getBarChart(session);
    %>
    
    <img src="${pageContext.request.contextPath}/DisplayChart?filename=<%=fileName%>">
    </body>
    View Code

    三、CategoryDataset 分类数据集引入

    1、利用JFreeChart 创建按颜色分类的水果销售报表

    1)编写Java代码,如下所示:

    public class BarChart03 {
    public static String getBarChart(HttpSession session){
    //1.构建数据集
    double [][] dataSet = new double[][]{{1330},{740},{660},{880}};
    
    String[] rowKeys = new String[]{"苹果","香蕉","橘子","梨子"};
    String[] columnKeys = new String[]{"深圳"};
    
    CategoryDataset dataset = DatasetUtilities.createCategoryDataset(rowKeys, columnKeys, dataSet);
    //2.用Chart工厂生成JFreeChar图表
    JFreeChart barChart3D = ChartFactory.createBarChart3D("面食消费统计图","水果", "数量", dataset, PlotOrientation.VERTICAL, true, true, true);
    //生成png图片
    String chartAsPNG =null;
    try {
    chartAsPNG= ServletUtilities.saveChartAsPNG(barChart3D, 700, 500, null, session);
    } catch (IOException e) {
    e.printStackTrace();
    }
    return chartAsPNG;
    }
    }
    View Code

    2)在web.xml文件中配置如下:

    <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>
    View Code

    3)在index.jsp页面中

    <body>
    <%
    String fileName = BarChart03.getBarChart(session);
    %>
    
    <img src="${pageContext.request.contextPath}/DisplayChart?filename=<%=fileName%>">
    </body>
    View Code

    2、利用JFreeChart 创建按颜色分类并且按地区分类水果销售报表

    1) 编写Java代码

    public class BarChart03 {
    public static String getBarChart(HttpSession session){
    //1.构建数据集
    double [][] dataSet = new double[][]{{1330,770,880,990},{740,760,890,890},{660,760,780,980},{880,790,880,790}};
    
    String[] rowKeys = new String[]{"苹果","香蕉","橘子","梨子"};
    String[] columnKeys = new String[]{"深圳","上海","海南","广东"};
    
    CategoryDataset dataset = DatasetUtilities.createCategoryDataset(rowKeys, columnKeys, dataSet);
    //2.用Chart工厂生成JFreeChar图表
    JFreeChart barChart3D = ChartFactory.createBarChart3D("水果销量统计图","水果", "销量", dataset, PlotOrientation.VERTICAL, true, true, true);
    //生成png图片
    String chartAsPNG =null;
    try {
    chartAsPNG= ServletUtilities.saveChartAsPNG(barChart3D, 700, 500, null, session);
    } catch (IOException e) {
    e.printStackTrace();
    }
    return chartAsPNG;
    }
    }
    View Code

    2)在web.xml文件中配置如下: 

    <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>
    View Code

    3)在index.jsp页面中

    <body>
    <%
    String fileName = BarChart03.getBarChart(session);
    %>
    
    <img src="${pageContext.request.contextPath}/DisplayChart?filename=<%=fileName%>">
    </body>
    View Code

    四、CategoryPlot ,BarRender3D 引入

    1、利用JFreeChart 创建自定义3D 柱状报表

    1).Java代码编写

    public class BarChart03 {
    
    public static String getBarChart(HttpSession session){
    //1.构建数据集
    double [][] dataSet = new double[][]{{1330,770,880,990},{740,760,890,890},{660,760,780,980},{880,790,880,790}};
    
    String[] rowKeys = new String[]{"苹果","香蕉","橘子","梨子"};
    String[] columnKeys = new String[]{"深圳","上海","海南","广东"};
    
    CategoryDataset dataset = DatasetUtilities.createCategoryDataset(rowKeys, columnKeys, dataSet);
    //2.用Chart工厂生成JFreeChar图表
    JFreeChart barChart3D = ChartFactory.createBarChart3D("水果销量统计图","水果", "销量", dataset, PlotOrientation.VERTICAL, true, true, true);
    //这里换成了getCategoryPlot方法!
    CategoryPlot plot = barChart3D.getCategoryPlot();
    
    plot.setBackgroundPaint(Color.white);
    // 设置网格竖线颜色
    plot.setOutlinePaint(Color.pink);
    // 设置网格横线颜色
    plot.setOutlinePaint(Color.pink);
    
    // 显示每个柱的数值,并修改该数值的字体属性
    BarRenderer3D renderer=new BarRenderer3D();
    renderer.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator());
    renderer.setBaseItemLabelsVisible(true);
    
    renderer.setBasePositiveItemLabelPosition(new ItemLabelPosition(ItemLabelAnchor.OUTSIDE12, TextAnchor.BASELINE_LEFT));
    renderer.setItemLabelAnchorOffset(10D); 
    
    // 设置平行柱的之间距离
    renderer.setItemMargin(0.4);
    plot.setRenderer(renderer);
    
    //生成png图片
    String chartAsPNG =null;
    try {
    chartAsPNG= ServletUtilities.saveChartAsPNG(barChart3D, 700, 500, null, session);
    } catch (Exception e) {
    e.printStackTrace();
    }
    return chartAsPNG;
    }
    }
    View Code

     2).在web.xml文件中配置如下: 

    <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>
    View Code

    3).在index.jsp页面中

    <body>
    <%
    String fileName = BarChart03.getBarChart(session);
    %>
    
    <img src="${pageContext.request.contextPath}/DisplayChart?filename=<%=fileName%>">
    </body>
    View Code

    五、饼状图

    1、DefaultPieDataset,PiePlot,PiePlot3D 引入

    2、利用JFreeChart 创建普通饼状图报表


    1)Java代码

    public class PieChart1 {
    
    public static String getPieChart(HttpSession session) throws Exception{
    //1.拿到数据集
    DefaultPieDataset dataSet = new DefaultPieDataset();
    dataSet.setValue("苹果",1000);
    dataSet.setValue("梨子",800);
    dataSet.setValue("香蕉",1200);
    dataSet.setValue("菠萝",400);
    
    //2.利用Chart工厂生产对象
    JFreeChart chart = ChartFactory.createPieChart("人均每年水果消耗量", dataSet, true, true, true);
    
    chart.addSubtitle(new TextTitle("2013年度"));
    
    PiePlot pieplot=(PiePlot)chart.getPlot();
    pieplot.setLabelFont(new Font("宋体",0,11));
    // 设置饼图是圆的(true),还是椭圆的(false);默认为true 
    pieplot.setCircular(true);
    // 没有数据的时候显示的内容
    pieplot.setNoDataMessage("无数据显示");
    StandardPieSectionLabelGenerator standarPieIG = new StandardPieSectionLabelGenerator("{0}:({1}.{2})", NumberFormat.getNumberInstance(), NumberFormat.getPercentInstance()); 
    pieplot.setLabelGenerator(standarPieIG); 
    //3.
    String png = ServletUtilities.saveChartAsPNG(chart, 700, 500, null, session);
    
    return png;
    }
    }
    View Code

    2)在web.xml文件中配置如下: 

    <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>
    View Code

    3)在index.jsp页面中

    <body>
    <%
    String fileName = BarChart03.getBarChart(session);
    %>
    
    <img src="${pageContext.request.contextPath}/DisplayChart?filename=<%=fileName%>">
    </body>
    View Code

    3、利用JFreeChart 创建普通饼状图报表,并且突出一个

    只需要在原来的java代码中加入:
      pieplot.setExplodePercent("菠萝",0.23);
    即可将这一栏突出显示;

    4、利用JFreeChart 创建3D 饼状图报表

    只需要将:
      JFreeChart chart = ChartFactory.createPieChart("人均每年水果消耗量", dataSet, true, true, true);
    改为:
      JFreeChart chart = ChartFactory.createPieChart3D("人均每年水果消耗量", dataSet,true, true, true);
    即可创建3D饼状图报表!

    5、针对3D饼状图添加 透明度等设置

    【只需要在上面的代码中加入如下的设置】:
     

     //设置开始角度 
      pieplot.setStartAngle(120D); 
      //设置方向为”顺时针方向“ 
      pieplot.setDirection(Rotation.CLOCKWISE); 
      //设置透明度,0.5F为半透明,1为不透明,0为全透明 
      pieplot.setForegroundAlpha(0.7F); 
    View Code

    六、SpringMVC整合JFreeChart 

    1、在springMVC的controller代码中:

    @RequestMapping("/testView")
    public ModelAndView testView(HttpServletRequest request) throws Exception{
    ModelAndView mv = new ModelAndView();
    //1.构建数据集
    DefaultCategoryDataset dataSet = new DefaultCategoryDataset();
    
    dataSet.addValue(510,"河南", "面食");
    dataSet.addValue(580,"黑龙江", "大米");
    dataSet.addValue(390,"陕西", "泡馍");
    dataSet.addValue(420,"广东", "杂食");
    
    //2.用Chart工厂生成JFreeChar图表
    JFreeChart barChart3D = ChartFactory.createBarChart3D("面食消费统计图","面食", "比例", dataSet, PlotOrientation.VERTICAL, true, true, true);
    // 6. 将图形转换为图片,传到前台
    String fileName = ServletUtilities.saveChartAsJPEG(barChart3D, 700, 400, null, request.getSession());
    String chartURL = request.getContextPath() + "/chart?filename=" + fileName;
    mv.addObject("fileName", fileName);
    mv.setViewName("success");
    return mv;
    }
    View Code

    2、在web.xml文件中配置如下:

    <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>/chart</url-pattern>
    </servlet-mapping>
    View Code

    3、在index.jsp页面:

    <a href="${pageContext.request.contextPath }/testView">查看详情</a>
    View Code

    4、在success.jsp页面

    <body>
    <img src="${pageContext.request.contextPath }/chart?filename=${fileName}">
    </body>
    View Code






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  • 原文地址:https://www.cnblogs.com/bkyy/p/8386459.html
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