了解 jfreechart 中的饼图

Question

public static JFreeChart createPieChart(java.lang.String title,
                        PieDataset dataset,
                        boolean legend,
                        boolean tooltips,
                        boolean urls)

我想知道使用最后一个参数urls；

这是什么意思？

有什么例子吗？

配置图表生成网址？是什么意思？

Answer 1

通过谷歌搜索，我找到了 ChartFactory http://www.jfree.org/jfreechart/api/gjdoc/org/jfree/chart/ChartFactory-source.html 的代码

在使用 url 的测试中有一个新的 StandardPieURLGenerator 的实例

jsfreechart 帮助说明：

Interface for a URL generator for plots that use data from a PieDataset. Classes that implement this interface:
 - are responsible for correctly escaping any text that is derived from the dataset, as this may be user-specified and could pose a security risk;
 - should be either (a) immutable, or (b) cloneable via the PublicCloneable interface (defined in the JCommon class library). This provides a mechanism for the referring plot to clone the generator if necessary.

http://www.jfree.org/jfreechart/api/javadoc/org/jfree/chart/urls/PieURLGenerator.html

我希望这会有所帮助。