日期:2014-05-17 浏览次数:20738 次
/**
* 柱状图
* @param dataset
* @param plot
* @param width
* @param height
* @throws Exception
*/
public void pillar(DefaultCategoryDataset dataset, PlotOrientation plot, Integer width, Integer height) throws Exception {
JFreeChart chart = ChartFactory.createBarChart3D("", "", "", dataset, plot, true, true, true);
CategoryPlot plot1 = chart.getCategoryPlot();//获得图表区域对象
BarRenderer3D bar = (BarRenderer3D) plot1.getRenderer();
bar.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator());//显示每个柱的数值
bar.setBaseItemLabelsVisible(true);
bar.setBasePositiveItemLabelPosition(new ItemLabelPosition(ItemLabelAnchor.OUTSIDE12, TextAnchor.BASELINE_CENTER));
bar.setItemLabelAnchorOffset(-12D);// 设置柱形图上的文字偏离值
if (height == 35) {
height = 135;
bar.setMaximumBarWidth(0.25);
bar.setItemMargin(0.000000005);
}
plot1.setRenderer(bar);
try {
NumberAxis axis = (NumberAxis) plot1.getRangeAxis();// y轴精度
axis.setAutoRangeIncludesZero(true);// 设置刻度必须从0开始
axis.setNumberFormatOverride(new DecimalFormat("#0"));
} catch (Exception e) {}
getResponse().setContentType("text/plain;charset=UTF-8");
ChartUtilities.writeChartAsPNG(getResponse().getOutputStream(), chart, width, height);
}
/**
* 折线图
* @param dataset
* @param plot
* @param width
* @param height
* @throws Exception
*/
public void line(DefaultCategoryDataset dataset, PlotOrientation plot, Integer width, Integer height) throws Exception {
JFreeChart chart = ChartFactory.createLineChart("", "", "", dataset, plot, true, true, true);
CategoryPlot plot1 = chart.getCategoryPlot();//获得图表区域对象
LineAndShapeRenderer renderer = new LineAndShapeRenderer();
//renderer.setSeriesPaint(0, Color.BLUE);// 改变折线的颜色
renderer.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator());//显示每个柱的数值
renderer.setBaseItemLabelsVisible(true);
renderer.setBasePositiveIte