我正在寻找一种方法来改变JFreechart中条形图的设计。这是我的excel图。如何更改以下设计格式的jfreechart条形图?
答案 0 :(得分:2)
以下代码可以生成类似的图表。这样就够了吗?
public class BarExample {
public static void main(String arg[]) throws IOException {
DefaultCategoryDataset dataSet = new DefaultCategoryDataset();
dataSet.setValue(2, Integer.valueOf(1), Integer.valueOf(5));
dataSet.setValue(7, Integer.valueOf(1), Integer.valueOf(10));
dataSet.setValue(4, Integer.valueOf(1), Integer.valueOf(15));
dataSet.setValue(9, Integer.valueOf(1), Integer.valueOf(20));
dataSet.setValue(6, Integer.valueOf(1), Integer.valueOf(25));
JFreeChart chart = ChartFactory.createBarChart
("Chart", "Number of Days", "Number of ECR", dataSet,
PlotOrientation.VERTICAL, false, true, false);
CategoryPlot plot = chart.getCategoryPlot();
// Reduce margin between bars
plot.getDomainAxis().setCategoryMargin(0.0);
// Reduce left and right margin
plot.getDomainAxis().setLowerMargin(0.0);
plot.getDomainAxis().setUpperMargin(0.0);
FileOutputStream outputStream = new FileOutputStream(
new File("chart.png"));
ChartUtilities.writeChartAsPNG(outputStream, chart, 1024, 768);
}
}