我的学习分享

1. 传送门

官方：http://www.jfree.org/jfreechart/ 最新版本2017年，版本号1.5

API：http://www.jfree.org/jfreechart/api/javadoc/index.html

2. 解决：

    //柱形图设置数值显示
    CategoryItemRenderer renderer = plot.getRenderer();
    renderer.setDefaultItemLabelGenerator(new StandardCategoryItemLabelGenerator());
    renderer.setDefaultItemLabelsVisible(true);
   
    plot.setRenderer(renderer);
   

3. 网上答案 - 补充

3.1 BarRenderer3D 在1.5版本中没有。

3.2 以前的答案失效

BarRenderer renderer=new BarRenderer();
renderer.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator());
renderer.setBaseItemLabelsVisible(true);
plot.setRenderer(renderer);//将修改后的属性值保存到图中

BarRenderer 中么有setBaseItemLabelGenerator，setBaseItemLabelsVisible，换成了setDefault*类方法。
————————————————
版权声明：本文为CSDN博主「菜鸟要学习」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/t07060239/article/details/106467386

Migration from JFreeChart 1.0.x

When migrating from JFreeChart 1.0.x to JFreeChart 1.5.0, please be aware of the following API changes:

• all the classes from JCommon that are used by JFreeChart have
  integrated within the JFreeChart jar file within a different package
  than before (you will need to change your imports);
• many methods getBaseXXX()/setBaseXXX() have been renamed setDefaultXXX()/getDefaultXXX();
• the ChartUtilities class has been renamed ChartUtils;
• all the classes relating to pseudo-3D charts have been removed, as much better 3D charts are offered by Orson Charts so we prefer not to maintain the pseudo-3D chart code within JFreeChart;
• the SegmentedTimelin class has been removed due to
  being (a) complex, (b) not always being correct and, as a result,
  generating too many support requests;
• the org.jfree.chart.utils.ParamChecks class has been renamed org.jfree.chart.utils.Args.

Please refer to Issue 66 for additional info.

https://gitee.com/canxijie_admin/jfreechart