JFreeChart生成统计图

public CategoryDataset createStackedBarDateSet(String strTtimePointZone,

String[][] arr) {

DefaultCategoryDataset dataset = new DefaultCategoryDataset();// 定义一个柱图的数据集合。

int rowindex = arr[0].length;

int columindex = arr.length;

String ty = "";

String tm = "";

String[] rowKeys = new String[rowindex-1];//定义每个柱子,指标名称

for (int i = 1; i < rowindex; i++) {

rowKeys[i - 1] = arr[0][i];//指标名称

}

String[] columnKeys = new String[columindex-3];//定义统计时间

double[][] data = new double[rowindex-1][columindex-3];

for (int j = 3; j < columindex; j++) {

for (int i = 1; i < rowindex; i++) {

ty = arr[j][0].substring(2, 4);

tm = arr[j][0].substring(4, 6);

columnKeys[j-3] = ty + "/" + tm;//指标时间

if (!arr[j][i].equals("--")) {

data[i - 1][j-3] = Double.parseDouble(arr[j][i]);

}

}

}

for(int n=0;n<data.length;n++){

for(int m = 0;m<data[0].length;m++){

dataset.addValue(data
[m], rowKeys
, columnKeys[m]);

}

}

return dataset;

}

图形生成方法：
public String getStackedBarChart(HttpSession session,

String strTtimePointZone, String[][] arr, PrintWriter pw) {

// 1:得到 CategoryDataset

// 2:JFreeChart对象

CategoryDataset dataset = this.createStackedBarDateSet(

strTtimePointZone, arr);// 数据集

JFreeChart chart = ChartFactory.createStackedBarChart("堆积柱图", // 图表标题

"时间", // x-axis label

"值", // y-axis label

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

);

// 设置JFreeChart的显示属性,对图形外部部分进行调整

chart.setBackgroundPaint(Color.white);// 设置图背景色

TextTitle title = new TextTitle("指标堆积图", font);// 设置字体大小，形状

chart.setTitle(title);

// 图例字体清晰

chart.setTextAntiAlias(true);

CategoryPlot plot = chart.getCategoryPlot();//画布属性

plot.setNoDataMessage("NO Data!");

plot.setRangeGridlinesVisible(true);// 设置横虚线可见

plot.setRangeGridlinePaint(Color.gray);// 虚线色彩

&n
4000
bsp; plot.setBackgroundPaint(Color.WHITE);// 设置网格背景色

plot.setDomainGridlinePaint(Color.DARK_GRAY);// 设置网格Y(Domain轴)颜色

plot.setRangeGridlinePaint(Color.DARK_GRAY);// 设置网格X横线颜色

plot.setRangeGridlineStroke(new BasicStroke(0.2f)); // 数据X轴网格线条笔触

plot.setDomainGridlineStroke(new BasicStroke(0.1f)); // 数据Y轴网格线条笔触

plot.setAxisOffset(new RectangleInsets(1.0, 1.0, 1.0, 1.0));// 设置曲线图与xy轴的距离

plot.setDomainCrosshairVisible(true);

plot.setRangeCrosshairVisible(true);

NumberAxis vn = (NumberAxis) plot.getRangeAxis();// 数据轴精度

vn.setAutoRangeIncludesZero(true);// 设置数据轴坐标从0开始

vn.setLabelFont(fontAxis);// 轴标题

DecimalFormat df = new DecimalFormat("");// 数据显示格式是百分比

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(fontAxis);// 轴标题

domainAxis.setTickLabelFont(fontAxis);// 轴数值

domainAxis.setMaximumCategoryLabelWidthRatio(0.6f);// 横轴上的 Lable 是否完整显示

// domainAxis.setCategoryLabelPositions(CategoryLabelPositions.createUpRotationLabelPositions(Math.PI / 7.0));

domainAxis.setCategoryLabelPositions(CategoryLabelPositions.DOWN_90);//X轴显示位置为90度

plot.setDomainAxis(domainAxis);

ValueAxis rangeAxis = plot.getRangeAxis();// y轴设置

rangeAxis.setLabelFont(fontText);

rangeAxis.setTickLabelFont(fontText);

rangeAxis.setUpperMargin(0.15);// 设置最高的一个 Item 与图片顶端的距离

rangeAxis.setLowerMargin(0.15);// 设置最低的一个 Item 与图片底端的距离

plot.setRangeAxis(rangeAxis);

// Renderer 对象是图形的绘制单元

// StackedBarRenderer renderer = (StackedBarRenderer) plot.getRenderer();

StackedBarRenderer3D renderer = new StackedBarRenderer3D();//just test

renderer.setItemLabelFont(fontText);

renderer.setMaximumBarWidth(0.05);// 设置柱子宽度

renderer.setMinimumBarLength(0.1);// 设置柱子高度

renderer.setBaseOutlinePaint(Color.BLACK);// 设置柱的边框颜色

renderer.setDrawBarOutline(true);// 设置柱的边框可见

renderer.setItemLabelGenerator(new StandardCategoryItemLabelGenerator());

renderer.setItemMargin(0.05);// 设置每个地区所包含的平行柱的之间距离

plot.setRenderer(renderer);

// 取得统计图表的第一个图例

LegendTitle legend = chart.getLegend(0);

//设置图例的字体

legend.setItemFont(fontText);

ChartRenderingInfo info = new ChartRenderingInfo(

new StandardEntityCollection());

try {

fileName = ServletUtilities.saveChartAsPNG(chart, 720, 540, info,

session);// 生成图片,放到服务器的临时文件夹下

// Write the image map to the PrintWriter

ChartUtilities.writeImageMap(pw, fileName, info, false);

} catch (IOException e) {

e.printStackTrace();

}

pw.flush();

return fileName;

}

public String getBarChart(HttpSession session, String strTimePointZone,

String[][] arr, PrintWriter pw) {

CategoryDataset categorydataset1 = this.createBarDataSet(strTimePointZone, arr);//柱线数据集

CategoryDataset categorydataset = this.createBarDataSet(strTimePointZone, arr);//折线数据集(相同方法)

JFreeChart chart = ChartFactory.createBarChart("指标混合图",

"时间",

"值",

categorydataset1,

PlotOrientation.VERTICAL,

true,

false,

false);

chart.setBackgroundPaint(Color.white);// 设置曲线图背景色

TextTitle title = new TextTitle("指标混合图", font);// 设置字体大小，形状

chart.setTitle(title);

chart.setTextAntiAlias(true);

CategoryPlot categoryplot = (CategoryPlot) chart.getPlot();

categoryplot.setNoDataMessage("NO Data!");

categoryplot.setDomainAxisLocation(AxisLocation.BOTTOM_OR_RIGHT);

//映射折线数据集

categoryplot.setDataset(1, categorydataset);

categoryplot.mapDatasetToRangeAxis(1, 1);

categoryplot.setBackgroundPaint(Color.white);

categoryplot.setRangeGridlinesVisible(true);// 设置横虚线可见

categoryplot.setRangeGridlinePaint(Color.gray);// 虚线色彩

categoryplot.setDomainGridlinePaint(Color.DARK_GRAY);// 设置网格Y(Domain轴)颜色

categoryplot.setRangeGridlinePaint(Color.DARK_GRAY);// 设置网格X横线颜色

categoryplot.setRangeGridlineStroke(new BasicStroke(0.2f)); // 数据X轴网格线条笔触

categoryplot.setDomainGridlineStroke(new BasicStroke(0.1f)); // 数据Y轴网格线条笔触

categoryplot.setAxisOffset(new RectangleInsets(1.0, 1.0, 1.0, 1.0));// 设置图与xy轴的距离

categoryplot.setDomainCrosshairVisible(true);

categoryplot.setRangeCrosshairVisible(true);

CategoryAxis categoryaxis = categoryplot.getDomainAxis();//X轴

categoryaxis.setLabelFont(fontText);

categoryaxis.setTickLabelFont(fontText);

// categoryaxis.setCategoryLabelPositions(CategoryLabelPositions.createUpRotationLabelPositions(Math.PI / 7.0));

categoryaxis.setCategoryLabelPositions(CategoryLabelPositions.DOWN_90);//X轴显示位置为90度

NumberAxis left = new NumberAxis("值");//Y轴

NumberAxis numberaxis = new NumberAxis("比率");//Y轴

numberaxis.setLabelFont(fontText);

left.setLabelFont(fontText);

categoryplot.setRangeAxis(0, left);//左侧Y轴

categoryplot.setRangeAxis(1, numberaxis);//右侧Y轴

BarRenderer3D renderer = new BarRenderer3D();

renderer.setBaseOutlinePaint(Color.BLACK);

// 设置每个地区所包含的平行柱之间的距离renderer.setItemMargin(0.1);

renderer.setMaximumBarWidth(0.05);// 设置柱子宽度

renderer.setMinimumBarLength(0.1);// 设置柱子高度

renderer.setBaseOutlinePaint(Color.BLACK);// 设置柱的边框颜色

renderer.setDrawBarOutline(true);// 设置柱的边框可见

renderer.setItemLabelGenerator(new StandardCategoryItemLabelGenerator());

renderer.setItemMargin(0.05);

LineAndShapeRenderer lineandshaperenderer = new LineAndShapeRenderer();//折线对象

lineandshaperenderer.setToolTipGenerator(new StandardCategoryToolTipGenerator());

lineandshaperenderer.setSeriesPaint(0, new Color(0, 0, 255));

categoryplot.setRenderer(0,renderer);

categoryplot.setRenderer(1, lineandshaperenderer);

categoryplot.setDatasetRenderingOrder(DatasetRenderingOrder.FORWARD);

//图例各个属性

LegendTitle legendtitle = chart.getLegend(0);

legendtitle.setMargin(new RectangleInsets(2D, 2D, 2D, 2D));

legendtitle.setBorder(new BlockBorder());

legendtitle.setItemFont(fontText);

ChartRenderingInfo info = new ChartRenderingInfo(new StandardEntityCollection());

try {

fileName = ServletUtilities.saveChartAsPNG(chart, 720, 540, info,

session);// 生成图片

ChartUtilities.writeImageMap(pw, fileName, info, false);

} catch (IOException e) {

e.printStackTrace();

}

pw.flush();

return fileName;// 返回生成图片的文件名

}