了解jfreechart中的饼图

Question

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

我想知道如何使用最后一个参数url;

这是什么意思？

它的任何例子？

配置图表以生成URL？这是什么意思？

Answer 1

通过google搜索，我发现的ChartFactoryhttp://www.jfree.org/jfreechart/api/gjdoc/org/jfree/chart/ChartFactory-source.html

该代码寻找中使用URL出现的新StandardPieURLGenerator

的jsfreechart帮助一个实例的测试告诉：

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

我希望这可以提供帮助。