jfreechart形成图

package  com.dc.bd.system.util;
 
import  java.awt.Color;
import  java.awt.Font;
import  java.io.File;
import  java.io.FileOutputStream;
import  java.text.DecimalFormat;
import  java.text.NumberFormat;
 
import  org.jfree.chart.ChartFactory;
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.axis.ValueAxis;
import  org.jfree.chart.labels.StandardCategoryItemLabelGenerator;
import  org.jfree.chart.labels.StandardPieSectionLabelGenerator;
import  org.jfree.chart.plot.CategoryPlot;
import  org.jfree.chart.plot.PiePlot3D;
import  org.jfree.chart.plot.PlotOrientation;
import  org.jfree.chart.renderer.category.BarRenderer;
import  org.jfree.chart.renderer.category.LineAndShapeRenderer;
import  org.jfree.chart.renderer.category.StackedBarRenderer;
import  org.jfree.chart.title.TextTitle;
import  org.jfree.data.category.CategoryDataset;
import  org.jfree.data.general.DatasetUtilities;
import  org.jfree.data.general.DefaultPieDataset;
import  org.jfree.data.general.PieDataset;
 
//jar
//jfreechart-1.0.10.jar  (能解决新版本的乱码问题)
//jcommon-1.0.13.jar
 
/** */
/**
 * 实际取色的时候一定要16位的,这样比较准确
 *
 * @author new
 */
public  class  CreateChartServiceImpl {
    private  static  final  String CHART_PATH ="E:/test/";
 
    public  static  void  main(String[] args) {
        // TODO Auto-generated method stub
        CreateChartServiceImpl pm =new  CreateChartServiceImpl();
        // 生成饼状图
        //pm.makePieChart();
        // 生成单组柱状图
        //pm.makeBarChart();
        // 生成多组柱状图
        //pm.makeBarGroupChart();
        // 生成堆积柱状图
        //pm.makeStackedBarChart();
        // 生成折线图
        pm.makeLineAndShapeChart();
    }
 
    /** */
    /**
     * 生成折线图
     */
    public  void  makeLineAndShapeChart() {
        double[][] data =new  double[][] {
                {672,766,223,540,126  },
                {325,521,210,340,106  },
                {332,256,523,240,526  } };
        String[] rowKeys = {"苹果","梨子","葡萄"  };
        String[] columnKeys = {"北京","上海","广州","成都","深圳"  };
        CategoryDataset dataset = getBarData(data, rowKeys, columnKeys);
        createTimeXYChar("折线图","x轴","y轴", dataset,"lineAndShap.png");
    }
 
    /** */
    /**
     * 生成分组的柱状图
     */
    public  void  makeBarGroupChart() {
        double[][] data =new  double[][] { {672,766,223,540,126  },
                {325,521,210,340,106  }, {332,256,523,240,526  } };
        String[] rowKeys = {"苹果","梨子","葡萄"  };
        String[] columnKeys = {"北京","上海","广州","成都","深圳"  };
        CategoryDataset dataset = getBarData(data, rowKeys, columnKeys);
        createBarChart(dataset,"x坐标","y坐标","柱状图","barGroup.png");
    }
 
    /** */
    /**
     * 生成柱状图
     */
    public  void  makeBarChart() {
        double[][] data =new  double[][] { {672,766,223,540,126  } };
        String[] rowKeys = {"苹果"  };
        String[] columnKeys = {"北京","上海","广州","成都","深圳"  };
        CategoryDataset dataset = getBarData(data, rowKeys, columnKeys);
        createBarChart(dataset,"x坐标","y坐标","柱状图","bar.png");
    }
 
    /** */
    /**
     * 生成堆栈柱状图
     */
    public  void  makeStackedBarChart() {
        double[][] data =new  double[][] { {0.21,0.66,0.23,0.40,0.26  },
                {0.25,0.21,0.10,0.40,0.16  } };
        String[] rowKeys = {"苹果","梨子"  };
        String[] columnKeys = {"北京","上海","广州","成都","深圳"  };
        CategoryDataset dataset = getBarData(data, rowKeys, columnKeys);
        createStackedBarChart(dataset,"x坐标","y坐标","柱状图","stsckedBar.png");
    }
 
    /** */
    /**
     * 生成饼状图
     */
    public  void  makePieChart() {
        double[] data = {9,91  };
        String[] keys = {"失败率","成功率"  };
 
        createValidityComparePimChar(getDataPieSetByUtil(data, keys),"饼状图",
                "pie2.png", keys);
    }
 
    // 柱状图,折线图 数据集
    public  CategoryDataset getBarData(double[][] data, String[] rowKeys,
            String[] columnKeys) {
        return  DatasetUtilities
                .createCategoryDataset(rowKeys, columnKeys, data);
 
    }
 
    // 饼状图 数据集
    public  PieDataset getDataPieSetByUtil(double[] data,
            String[] datadescription) {
 
        if  (data !=null  && datadescription !=null) {
            if  (data.length == datadescription.length) {
                DefaultPieDataset dataset =new  DefaultPieDataset();
                for  (int  i =0; i < data.length; i++) {
                    dataset.setValue(datadescription[i], data[i]);
                }
                return  dataset;
            }
 
        }
 
        return  null;
    }
 
    /** */
    /**
     * 柱状图
     *
     *@param dataset
     *            数据集
     * @param xName
     *            x轴的说明(如种类,时间等)
     * @param yName
     *            y轴的说明(如速度,时间等)
     * @param chartTitle
     *            图标题
     * @param charName
     *            生成图片的名字
     * @return
     */
    public  String createBarChart(CategoryDataset dataset, String xName,
            String yName, String chartTitle, String charName) {
        JFreeChart chart = ChartFactory.createBarChart(chartTitle,// 图表标题
                xName,// 目录轴的显示标签
                yName,// 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
                );
        Font labelFont =new  Font("SansSerif", Font.TRUETYPE_FONT,12);
        /**//*
             * VALUE_TEXT_ANTIALIAS_OFF表示将文字的抗锯齿关闭,
             * 使用的关闭抗锯齿后,字体尽量选择12到14号的宋体字,这样文字最清晰好看
             */
        // chart.getRenderingHints().put(RenderingHints.KEY_TEXT_ANTIALIASING,RenderingHints.VALUE_TEXT_ANTIALIAS_OFF);
        chart.setTextAntiAlias(false);
        chart.setBackgroundPaint(Color.white);
        // create plot
        CategoryPlot plot = chart.getCategoryPlot();
        // 设置横虚线可见
        plot.setRangeGridlinesVisible(true);
        // 虚线色彩
        plot.setRangeGridlinePaint(Color.gray);
 
        // 数据轴精度
        NumberAxis vn = (NumberAxis) plot.getRangeAxis();
        // vn.setAutoRangeIncludesZero(true);
        DecimalFormat df =new  DecimalFormat("#0.00");
        vn.setNumberFormatOverride(df);// 数据轴数据标签的显示格式
        // x轴设置
        CategoryAxis domainAxis = plot.getDomainAxis();
        domainAxis.setLabelFont(labelFont);// 轴标题
        domainAxis.setTickLabelFont(labelFont);// 轴数值
 
        // Lable(Math.PI/3.0)度倾斜
        // domainAxis.setCategoryLabelPositions(CategoryLabelPositions
        // .createUpRotationLabelPositions(Math.PI / 3.0));
 
        domainAxis.setMaximumCategoryLabelWidthRatio(0.6f);// 横轴上的 Lable 是否完整显示
 
        // 设置距离图片左端距离
        domainAxis.setLowerMargin(0.1);
        // 设置距离图片右端距离
        domainAxis.setUpperMargin(0.1);
        // 设置 columnKey 是否间隔显示
        // domainAxis.setSkipCategoryLabelsToFit(true);
 
        plot.setDomainAxis(domainAxis);
        // 设置柱图背景色(注意,系统取色的时候要使用16位的模式来查看颜色编码,这样比较准确)
        plot.setBackgroundPaint(new  Color(255,255,204));
 
        // y轴设置
        ValueAxis rangeAxis = plot.getRangeAxis();
        rangeAxis.setLabelFont(labelFont);
        rangeAxis.setTickLabelFont(labelFont);
        // 设置最高的一个 Item 与图片顶端的距离
        rangeAxis.setUpperMargin(0.15);
        // 设置最低的一个 Item 与图片底端的距离
        rangeAxis.setLowerMargin(0.15);
        plot.setRangeAxis(rangeAxis);
 
        BarRenderer renderer =new  BarRenderer();
        // 设置柱子宽度
        renderer.setMaximumBarWidth(0.05);
        // 设置柱子高度
        renderer.setMinimumBarLength(0.2);
        // 设置柱子边框颜色
        renderer.setBaseOutlinePaint(Color.BLACK);
        // 设置柱子边框可见
        renderer.setDrawBarOutline(true);
 
        // // 设置柱的颜色
        renderer.setSeriesPaint(0,new  Color(204,255,255));
        renderer.setSeriesPaint(1,new  Color(153,204,255));
        renderer.setSeriesPaint(2,new  Color(51,204,204));
 
        // 设置每个地区所包含的平行柱的之间距离
        renderer.setItemMargin(0.0);
 
        // 显示每个柱的数值,并修改该数值的字体属性
        renderer.setIncludeBaseInRange(true);
        renderer
                .setBaseItemLabelGenerator(new  StandardCategoryItemLabelGenerator());
        renderer.setBaseItemLabelsVisible(true);
 
        plot.setRenderer(renderer);
        // 设置柱的透明度
        plot.setForegroundAlpha(1.0f);
 
        FileOutputStream fos_jpg =null;
        try  {
            isChartPathExist(CHART_PATH);
            String chartName = CHART_PATH + charName;
            fos_jpg =new  FileOutputStream(chartName);
            ChartUtilities.writeChartAsPNG(fos_jpg, chart,500,500,true,10);
            return  chartName;
        }catch  (Exception e) {
            e.printStackTrace();
            return  null;
        }finally  {
            try  {
                fos_jpg.close();
            }catch  (Exception e) {
                e.printStackTrace();
            }
        }
    }
 
    /** */
    /**
     * 横向图
     *
     * @param dataset
     *            数据集
     * @param xName
     *            x轴的说明(如种类,时间等)
     * @param yName
     *            y轴的说明(如速度,时间等)
     * @param chartTitle
     *            图标题
     * @param charName
     *            生成图片的名字
     * @return
     */
    public  String createHorizontalBarChart(CategoryDataset dataset,
            String xName, String yName, String chartTitle, String charName) {
        JFreeChart chart = ChartFactory.createBarChart(chartTitle,// 图表标题
                xName,// 目录轴的显示标签
                yName,// 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
                );
 
        CategoryPlot plot = chart.getCategoryPlot();
        // 数据轴精度
        NumberAxis vn = (NumberAxis) plot.getRangeAxis();
        // 设置刻度必须从0开始
        // vn.setAutoRangeIncludesZero(true);
        DecimalFormat df =new  DecimalFormat("#0.00");
        vn.setNumberFormatOverride(df);// 数据轴数据标签的显示格式
 
        CategoryAxis domainAxis = plot.getDomainAxis();
 
        domainAxis.setCategoryLabelPositions(CategoryLabelPositions.UP_45);// 横轴上的
        // Lable
        Font labelFont =new  Font("SansSerif", Font.TRUETYPE_FONT,12);
 
        domainAxis.setLabelFont(labelFont);// 轴标题
        domainAxis.setTickLabelFont(labelFont);// 轴数值
 
        domainAxis.setMaximumCategoryLabelWidthRatio(0.8f);// 横轴上的 Lable 是否完整显示
        // domainAxis.setVerticalCategoryLabels(false);
        plot.setDomainAxis(domainAxis);
 
        ValueAxis rangeAxis = plot.getRangeAxis();
        // 设置最高的一个 Item 与图片顶端的距离
        rangeAxis.setUpperMargin(0.15);
        // 设置最低的一个 Item 与图片底端的距离
        rangeAxis.setLowerMargin(0.15);
        plot.setRangeAxis(rangeAxis);
        BarRenderer renderer =new  BarRenderer();
        // 设置柱子宽度
        renderer.setMaximumBarWidth(0.03);
        // 设置柱子高度
        renderer.setMinimumBarLength(30);
 
        renderer.setBaseOutlinePaint(Color.BLACK);
 
        // 设置柱的颜色
        renderer.setSeriesPaint(0, Color.GREEN);
        renderer.setSeriesPaint(1,new  Color(0,0,255));
        // 设置每个地区所包含的平行柱的之间距离
        renderer.setItemMargin(0.5);
        // 显示每个柱的数值,并修改该数值的字体属性
        renderer
                .setBaseItemLabelGenerator(new  StandardCategoryItemLabelGenerator());
        // 设置柱的数值可见
        renderer.setBaseItemLabelsVisible(true);
 
        plot.setRenderer(renderer);
        // 设置柱的透明度
        plot.setForegroundAlpha(0.6f);
 
        FileOutputStream fos_jpg =null;
        try  {
            isChartPathExist(CHART_PATH);
            String chartName = CHART_PATH + charName;
            fos_jpg =new  FileOutputStream(chartName);
            ChartUtilities.writeChartAsPNG(fos_jpg, chart,500,500,true,10);
            return  chartName;
        }catch  (Exception e) {
            e.printStackTrace();
            return  null;
        }finally  {
            try  {
                fos_jpg.close();
            }catch  (Exception e) {
                e.printStackTrace();
            }
        }
    }
 
    /** */
    /**
     * 饼状图
     *
     * @param dataset
     *            数据集
     * @param chartTitle
     *            图标题
     * @param charName
     *            生成图的名字
     * @param pieKeys
     *            分饼的名字集
     * @return
     */
    public  String createValidityComparePimChar(PieDataset dataset,
            String chartTitle, String charName, String[] pieKeys) {
        JFreeChart chart = ChartFactory.createPieChart3D(chartTitle,// chart
                // title
                dataset,// data
                true,// include legend
                true,false);
 
        // 使下说明标签字体清晰,去锯齿类似于
        // chart.getRenderingHints().put(RenderingHints.KEY_TEXT_ANTIALIASING,RenderingHints.VALUE_TEXT_ANTIALIAS_OFF);的效果
        chart.setTextAntiAlias(false);
        // 图片背景色
        chart.setBackgroundPaint(Color.white);
        // 设置图标题的字体重新设置title
        Font font =new  Font("隶书", Font.BOLD,25);
        TextTitle title =new  TextTitle(chartTitle);
        title.setFont(font);
        chart.setTitle(title);
 
        PiePlot3D plot = (PiePlot3D) chart.getPlot();
        // 图片中显示百分比:默认方式
 
        // 指定饼图轮廓线的颜色
        // plot.setBaseSectionOutlinePaint(Color.BLACK);
        // plot.setBaseSectionPaint(Color.BLACK);
 
        // 设置无数据时的信息
        plot.setNoDataMessage("无对应的数据,请重新查询。");
 
        // 设置无数据时的信息显示颜色
        plot.setNoDataMessagePaint(Color.red);
 
        // 图片中显示百分比:自定义方式,{0} 表示选项, {1} 表示数值, {2} 表示所占比例 ,小数点后两位
        plot.setLabelGenerator(new  StandardPieSectionLabelGenerator(
                "{0}={1}({2})", NumberFormat.getNumberInstance(),
                new  DecimalFormat("0.00%")));
        // 图例显示百分比:自定义方式, {0} 表示选项, {1} 表示数值, {2} 表示所占比例
        plot.setLegendLabelGenerator(new  StandardPieSectionLabelGenerator(
                "{0}={1}({2})"));
 
        plot.setLabelFont(new  Font("SansSerif", Font.TRUETYPE_FONT,12));
 
        // 指定图片的透明度(0.0-1.0)
        plot.setForegroundAlpha(0.65f);
        // 指定显示的饼图上圆形(false)还椭圆形(true)
        plot.setCircular(false,true);
 
        // 设置第一个 饼块section 的开始位置,默认是12点钟方向
        plot.setStartAngle(90);
 
        // // 设置分饼颜色
        plot.setSectionPaint(pieKeys[0],new  Color(244,194,144));
        plot.setSectionPaint(pieKeys[1],new  Color(144,233,144));
 
        FileOutputStream fos_jpg =null;
        try  {
            // 文件夹不存在则创建
            isChartPathExist(CHART_PATH);
            String chartName = CHART_PATH + charName;
            fos_jpg =new  FileOutputStream(chartName);
            // 高宽的设置影响椭圆饼图的形状
            ChartUtilities.writeChartAsPNG(fos_jpg, chart,500,230);
 
            return  chartName;
        }catch  (Exception e) {
            e.printStackTrace();
            return  null;
        }finally  {
            try  {
                fos_jpg.close();
                System.out.println("create pie-chart.");
            }catch  (Exception e) {
                e.printStackTrace();
            }
        }
 
    }
 
    /** */
    /**
     * 判断文件夹是否存在,如果不存在则新建
     *
     * @param chartPath
     */
    private  void  isChartPathExist(String chartPath) {
        File file =new  File(chartPath);
        if  (!file.exists()) {
            file.mkdirs();
            // log.info("CHART_PATH="+CHART_PATH+"create.");
        }
    }
 
    /** */
    /**
     * 折线图
     *
     * @param chartTitle
     * @param x
     * @param y
     * @param xyDataset
     * @param charName
     * @return
     */
    public  String createTimeXYChar(String chartTitle, String x, String y,
            CategoryDataset xyDataset, String charName) {
 
        JFreeChart chart = ChartFactory.createLineChart(chartTitle, x, y,
                xyDataset, PlotOrientation.VERTICAL,true,true,false);
 
        chart.setTextAntiAlias(false);
        chart.setBackgroundPaint(Color.WHITE);
        // 设置图标题的字体重新设置title
        Font font =new  Font("隶书", Font.BOLD,25);
        TextTitle title =new  TextTitle(chartTitle);
        title.setFont(font);
        chart.setTitle(title);
        // 设置面板字体
        Font labelFont =new  Font("SansSerif", Font.TRUETYPE_FONT,12);
 
        chart.setBackgroundPaint(Color.WHITE);
 
        CategoryPlot categoryplot = (CategoryPlot) chart.getPlot();
        // x轴 // 分类轴网格是否可见
        categoryplot.setDomainGridlinesVisible(true);
        // y轴 //数据轴网格是否可见
        categoryplot.setRangeGridlinesVisible(true);
 
        categoryplot.setRangeGridlinePaint(Color.WHITE);// 虚线色彩
 
        categoryplot.setDomainGridlinePaint(Color.WHITE);// 虚线色彩
 
        categoryplot.setBackgroundPaint(Color.lightGray);
 
        // 设置轴和面板之间的距离
        // categoryplot.setAxisOffset(new RectangleInsets(5D, 5D, 5D, 5D));
 
        CategoryAxis domainAxis = categoryplot.getDomainAxis();
 
        domainAxis.setLabelFont(labelFont);// 轴标题
        domainAxis.setTickLabelFont(labelFont);// 轴数值
 
        domainAxis.setCategoryLabelPositions(CategoryLabelPositions.UP_45);// 横轴上的
        // Lable
        // 45度倾斜
        // 设置距离图片左端距离
        domainAxis.setLowerMargin(0.0);
        // 设置距离图片右端距离
        domainAxis.setUpperMargin(0.0);
 
        NumberAxis numberaxis = (NumberAxis) categoryplot.getRangeAxis();
        numberaxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
        numberaxis.setAutoRangeIncludesZero(true);
 
        // 获得renderer 注意这里是下嗍造型到lineandshaperenderer!!
        LineAndShapeRenderer lineandshaperenderer = (LineAndShapeRenderer) categoryplot
                .getRenderer();
 
        lineandshaperenderer.setBaseShapesVisible(true);// series 点(即数据点)可见
        lineandshaperenderer.setBaseLinesVisible(true);// series 点(即数据点)间有连线可见
 
        // 显示折点数据
        // lineandshaperenderer.setBaseItemLabelGenerator(new
        // StandardCategoryItemLabelGenerator());
        // lineandshaperenderer.setBaseItemLabelsVisible(true);
 
        FileOutputStream fos_jpg =null;
        try  {
            isChartPathExist(CHART_PATH);
            String chartName = CHART_PATH + charName;
            fos_jpg =new  FileOutputStream(chartName);
 
            // 将报表保存为png文件
            ChartUtilities.writeChartAsPNG(fos_jpg, chart,500,510);
 
            return  chartName;
        }catch  (Exception e) {
            e.printStackTrace();
            return  null;
        }finally  {
            try  {
                fos_jpg.close();
                System.out.println("create time-createTimeXYChar.");
            }catch  (Exception e) {
                e.printStackTrace();
            }
        }
    }
 
    /** */
    /**
     * 堆栈柱状图
     *
     * @param dataset
     * @param xName
     * @param yName
     * @param chartTitle
     * @param charName
     * @return
     */
    public  String createStackedBarChart(CategoryDataset dataset, String xName,
            String yName, String chartTitle, String charName) {
        // 1:得到 CategoryDataset
 
        // 2:JFreeChart对象
        JFreeChart chart = ChartFactory.createStackedBarChart(chartTitle,// 图表标题
                xName,// 目录轴的显示标签
                yName,// 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
                );
        // 图例字体清晰
        chart.setTextAntiAlias(false);
 
        chart.setBackgroundPaint(Color.WHITE);
 
        // 2 .2 主标题对象 主标题对象是 TextTitle 类型
        chart
                .setTitle(new  TextTitle(chartTitle,new  Font("隶书", Font.BOLD,
                        25)));
        // 2 .2.1:设置中文
        // x,y轴坐标字体
        Font labelFont =new  Font("SansSerif", Font.TRUETYPE_FONT,12);
 
        // 2 .3 Plot 对象 Plot 对象是图形的绘制结构对象
        CategoryPlot plot = chart.getCategoryPlot();
 
        // 设置横虚线可见
        plot.setRangeGridlinesVisible(true);
        // 虚线色彩
        plot.setRangeGridlinePaint(Color.gray);
 
        // 数据轴精度
        NumberAxis vn = (NumberAxis) plot.getRangeAxis();
        // 设置最大值是1
        vn.setUpperBound(1);
        // 设置数据轴坐标从0开始
        // vn.setAutoRangeIncludesZero(true);
        // 数据显示格式是百分比
        DecimalFormat df =new  DecimalFormat("0.00%");
        vn.setNumberFormatOverride(df);// 数据轴数据标签的显示格式
        // DomainAxis (区域轴,相当于 x 轴), RangeAxis (范围轴,相当于 y 轴)
        CategoryAxis domainAxis = plot.getDomainAxis();
 
        domainAxis.setLabelFont(labelFont);// 轴标题
        domainAxis.setTickLabelFont(labelFont);// 轴数值
 
        // x轴坐标太长,建议设置倾斜,如下两种方式选其一,两种效果相同
        // 倾斜(1)横轴上的 Lable 45度倾斜
        // domainAxis.setCategoryLabelPositions(CategoryLabelPositions.UP_45);
        // 倾斜(2)Lable(Math.PI 3.0)度倾斜
        // domainAxis.setCategoryLabelPositions(CategoryLabelPositions
        // .createUpRotationLabelPositions(Math.PI / 3.0));
 
        domainAxis.setMaximumCategoryLabelWidthRatio(0.6f);// 横轴上的 Lable 是否完整显示
 
        plot.setDomainAxis(domainAxis);
 
        // y轴设置
        ValueAxis rangeAxis = plot.getRangeAxis();
        rangeAxis.setLabelFont(labelFont);
        rangeAxis.setTickLabelFont(labelFont);
        // 设置最高的一个 Item 与图片顶端的距离
        rangeAxis.setUpperMargin(0.15);
        // 设置最低的一个 Item 与图片底端的距离
        rangeAxis.setLowerMargin(0.15);
        plot.setRangeAxis(rangeAxis);
 
        // Renderer 对象是图形的绘制单元
        StackedBarRenderer renderer =new  StackedBarRenderer();
        // 设置柱子宽度
        renderer.setMaximumBarWidth(0.05);
        // 设置柱子高度
        renderer.setMinimumBarLength(0.1);
        // 设置柱的边框颜色
        renderer.setBaseOutlinePaint(Color.BLACK);
        // 设置柱的边框可见
        renderer.setDrawBarOutline(true);
 
        // // 设置柱的颜色(可设定也可默认)
        renderer.setSeriesPaint(0,new  Color(204,255,204));
        renderer.setSeriesPaint(1,new  Color(255,204,153));
 
        // 设置每个地区所包含的平行柱的之间距离
        renderer.setItemMargin(0.4);
 
        plot.setRenderer(renderer);
        // 设置柱的透明度(如果是3D的必须设置才能达到立体效果,如果是2D的设置则使颜色变淡)
        // plot.setForegroundAlpha(0.65f);
 
        FileOutputStream fos_jpg =null;
        try  {
            isChartPathExist(CHART_PATH);
            String chartName = CHART_PATH + charName;
            fos_jpg =new  FileOutputStream(chartName);
            ChartUtilities.writeChartAsPNG(fos_jpg, chart,500,500,true,10);
            return  chartName;
        }catch  (Exception e) {
            e.printStackTrace();
            return  null;
        }finally  {
            try  {
                fos_jpg.close();
            }catch  (Exception e) {
                e.printStackTrace();
            }
        }
    }
}

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