JFreeChart 展示饼状图

冷不防 2022-03-09 03:28 364阅读 0赞

# **1、图片展示** #

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTEyODU5ODk_size_16_color_FFFFFF_t_70][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTEyODU5ODk_size_16_color_FFFFFF_t_70 1][]

# **2、代码展示（记得导入相关jar包）** #

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 <td> &nbsp; package itvast.cn; import java.awt.Font; import java.io.File; import java.io.IOException; import org.apache.commons.lang.time.DateFormatUtils; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartUtilities; import org.jfree.chart.JFreeChart; import org.jfree.chart.labels.StandardPieSectionLabelGenerator; import org.jfree.chart.plot.PiePlot3D; import org.jfree.data.general.DefaultPieDataset; public class pie { &nbsp;&nbsp; &nbsp;public static void main(String[] args) throws IOException { &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; &nbsp; &nbsp; //创造数据&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; &nbsp; &nbsp;DefaultPieDataset dataset = getDataset(); &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; JFreeChart chart = ChartFactory.createPieChart3D("大学人数统计表", dataset, true, true, true); &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; &nbsp; /************************************************/ &nbsp;&nbsp; &nbsp; &nbsp;//111111主标题乱码处理 &nbsp;&nbsp; &nbsp; chart.getTitle().setFont(new Font("宋体", Font.BOLD, 18)); &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; /************************************************/ &nbsp;&nbsp; &nbsp; &nbsp;//222222子标题乱码处理 &nbsp;&nbsp; &nbsp; chart.getLegend().setItemFont(new Font("宋体", Font.BOLD, 15)); &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; /************************************************/ &nbsp;&nbsp; &nbsp; &nbsp;//处理图表对象 &nbsp;&nbsp; &nbsp; &nbsp;PiePlot3D plot = (PiePlot3D) chart.getPlot(); &nbsp;&nbsp; &nbsp; &nbsp;//字体显示 &nbsp;&nbsp; &nbsp; &nbsp;plot.setLabelFont(new Font("宋体", Font.BOLD, 15)); &nbsp;&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp; &nbsp;//饼图详细信息显示 &nbsp;&nbsp; &nbsp; &nbsp;String labelFormat="{0}:{1} ({2})"; &nbsp;&nbsp; &nbsp; &nbsp;plot.setLabelGenerator(new StandardPieSectionLabelGenerator(labelFormat)); &nbsp;&nbsp; &nbsp; &nbsp;//plot.setlabel &nbsp;&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; /************************************************/ &nbsp; &nbsp; &nbsp;// ChartFrame chartFrame = new ChartFrame("测试", chart); &nbsp; &nbsp; &nbsp;// chartFrame.setVisible(true); &nbsp; &nbsp; &nbsp;// chartFrame.pack(); &nbsp; &nbsp; &nbsp;&nbsp; &nbsp; &nbsp; &nbsp; String filename=DateFormatUtils.format(new java.util.Date(),"yyyyMMddHHmmss")+".jpeg"; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp; &nbsp; &nbsp; File file = new File("D:\\xx",filename); &nbsp; &nbsp; &nbsp;&nbsp; &nbsp; &nbsp; &nbsp; ChartUtilities.saveChartAsJPEG(file, chart, 600, 400); &nbsp; &nbsp; &nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;} &nbsp;&nbsp; &nbsp;public static DefaultPieDataset getDataset() { &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;DefaultPieDataset data = new DefaultPieDataset(); &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp; data.setValue("中南大学", 500); &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp; data.setValue("湖南大学", 200); &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp; data.setValue("理工大学", 600); &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp; data.setValue("涉外大学", 300); &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;return data; &nbsp;&nbsp; &nbsp;} } &nbsp; &nbsp; &nbsp; </td> 
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# **3、效果如下图示** #

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTEyODU5ODk_size_16_color_FFFFFF_t_70 2][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTEyODU5ODk_size_16_color_FFFFFF_t_70]: /images/20220309/a5adaef2eb0740e7910e3671fea5db48.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTEyODU5ODk_size_16_color_FFFFFF_t_70 1]: /images/20220309/bda6334fb3fc4716be7f148e48954f80.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTEyODU5ODk_size_16_color_FFFFFF_t_70 2]: /images/20220309/5f2a49737c9a4b55b04ad3279eea1e22.png