利用JFreeChart生成简单柱状图(Java)

 1     package barchartdemo1;  
 2       
 3     import <a href="http://lib.csdn.net/base/javaee" class='replace_word' title="Java EE知识库" target='_blank' style='color:#df3434; font-weight:bold;'>Java</a>.awt.Font;  
 4     import java.io.FileOutputStream;  
 5     import java.io.IOException;  
 6     import org.jfree.chart.ChartFactory;  
 7     import org.jfree.chart.ChartUtilities;  
 8     import org.jfree.chart.JFreeChart;  
 9     import org.jfree.chart.axis.CategoryAxis;  
10     import org.jfree.chart.axis.NumberAxis;  
11     import org.jfree.chart.plot.CategoryPlot;  
12     import org.jfree.chart.plot.PlotOrientation;  
13     import org.jfree.data.category.CategoryDataset;  
14     import org.jfree.data.category.DefaultCategoryDataset;  
15       
16     /** 
17      * 
18      * @author Administrator 
19      */  
20     public class Main {  
21       
22         /** 
23          * @param args the command line arguments 
24          */  
25         public static void main(String[] args) throws IOException {  
26             CategoryDataset ds = getDataSet();  
27             JFreeChart chart = ChartFactory.createBarChart3D(  
28                     "水果产量图", //图表标题  
29                     "水果", //目录轴的显示标签  
30                     "产量", //数值轴的显示标签  
31                     ds, //数据集  
32                     PlotOrientation.VERTICAL, //图表方向  
33                     true, //是否显示图例，对于简单的柱状图必须为false  
34                     false, //是否生成提示工具  
35                     false);         //是否生成url链接  
36       
37             CategoryPlot categoryplot = (CategoryPlot) chart.getPlot();  
38       
39             NumberAxis numberaxis = (NumberAxis) categoryplot.getRangeAxis();  
40       
41             CategoryAxis domainAxis = categoryplot.getDomainAxis();  
42       
43             /*------设置X轴坐标上的文字-----------*/  
44             domainAxis.setTickLabelFont(new Font("sans-serif", Font.PLAIN, 11));  
45       
46             /*------设置X轴的标题文字------------*/  
47             domainAxis.setLabelFont(new Font("宋体", Font.PLAIN, 12));  
48       
49             /*------设置Y轴坐标上的文字-----------*/  
50             numberaxis.setTickLabelFont(new Font("sans-serif", Font.PLAIN, 12));  
51       
52             /*------设置Y轴的标题文字------------*/  
53             numberaxis.setLabelFont(new Font("黑体", Font.PLAIN, 12));  
54       
55             /*------这句代码解决了底部汉字乱码的问题-----------*/  
56             chart.getLegend().setItemFont(new Font("宋体", Font.PLAIN, 12));  
57       
58             /*******这句代码解决了标题汉字乱码的问题********/  
59             chart.getTitle().setFont(new Font("宋体", Font.PLAIN, 12));  
60       
61             FileOutputStream out = null;  
62             try {  
63                 out = new FileOutputStream("E://Items//BarChartDemo1//image//1.jpg");  
64                 ChartUtilities.writeChartAsJPEG(out, 0.5f, chart, 400, 300, null);  
65             } finally {  
66                 try {  
67                     out.close();  
68                 } catch (Exception ex) {  
69                     ex.printStackTrace();  
70                 }  
71             }  
72         }  
73       
74         private static CategoryDataset getDataSet() {  
75             DefaultCategoryDataset ds = new DefaultCategoryDataset();  
76             ds.addValue(100, "北京", "苹果");  
77             ds.addValue(100, "上海", "苹果");  
78             ds.addValue(100, "广州", "苹果");  
79             ds.addValue(200, "北京", "梨子");  
80             ds.addValue(200, "上海", "梨子");  
81             ds.addValue(200, "广州", "梨子");  
82             ds.addValue(300, "北京", "葡萄");  
83             ds.addValue(300, "上海", "葡萄");  
84             ds.addValue(300, "广州", "葡萄");  
85             ds.addValue(400, "北京", "橘子");  
86             ds.addValue(400, "上海", "橘子");  
87             ds.addValue(400, "广州", "橘子");  
88             ds.addValue(500, "北京", "香蕉");  
89             ds.addValue(500, "上海", "香蕉");  
90             ds.addValue(500, "广州", "香蕉");  
91             return ds;  
92         }  
93     }

 1     package barchartdemo1;  
 2       
 3     import <a href="http://lib.csdn.net/base/javaee" class='replace_word' title="Java EE知识库" target='_blank' style='color:#df3434; font-weight:bold;'>Java</a>.awt.Font;  
 4     import java.io.FileOutputStream;  
 5     import java.io.IOException;  
 6     import org.jfree.chart.ChartFactory;  
 7     import org.jfree.chart.ChartUtilities;  
 8     import org.jfree.chart.JFreeChart;  
 9     import org.jfree.chart.axis.CategoryAxis;  
10     import org.jfree.chart.axis.NumberAxis;  
11     import org.jfree.chart.plot.CategoryPlot;  
12     import org.jfree.chart.plot.PlotOrientation;  
13     import org.jfree.data.category.CategoryDataset;  
14     import org.jfree.data.category.DefaultCategoryDataset;  
15       
16     /** 
17      * 
18      * @author Administrator 
19      */  
20     public class Main {  
21       
22         /** 
23          * @param args the command line arguments 
24          */  
25         public static void main(String[] args) throws IOException {  
26             CategoryDataset ds = getDataSet();  
27             JFreeChart chart = ChartFactory.createBarChart3D(  
28                     "水果产量图", //图表标题  
29                     "水果", //目录轴的显示标签  
30                     "产量", //数值轴的显示标签  
31                     ds, //数据集  
32                     PlotOrientation.VERTICAL, //图表方向  
33                     true, //是否显示图例，对于简单的柱状图必须为false  
34                     false, //是否生成提示工具  
35                     false);         //是否生成url链接  
36       
37             CategoryPlot categoryplot = (CategoryPlot) chart.getPlot();  
38       
39             NumberAxis numberaxis = (NumberAxis) categoryplot.getRangeAxis();  
40       
41             CategoryAxis domainAxis = categoryplot.getDomainAxis();  
42       
43             /*------设置X轴坐标上的文字-----------*/  
44             domainAxis.setTickLabelFont(new Font("sans-serif", Font.PLAIN, 11));  
45       
46             /*------设置X轴的标题文字------------*/  
47             domainAxis.setLabelFont(new Font("宋体", Font.PLAIN, 12));  
48       
49             /*------设置Y轴坐标上的文字-----------*/  
50             numberaxis.setTickLabelFont(new Font("sans-serif", Font.PLAIN, 12));  
51       
52             /*------设置Y轴的标题文字------------*/  
53             numberaxis.setLabelFont(new Font("黑体", Font.PLAIN, 12));  
54       
55             /*------这句代码解决了底部汉字乱码的问题-----------*/  
56             chart.getLegend().setItemFont(new Font("宋体", Font.PLAIN, 12));  
57       
58             /*******这句代码解决了标题汉字乱码的问题********/  
59             chart.getTitle().setFont(new Font("宋体", Font.PLAIN, 12));  
60       
61             FileOutputStream out = null;  
62             try {  
63                 out = new FileOutputStream("E://Items//BarChartDemo1//image//1.jpg");  
64                 ChartUtilities.writeChartAsJPEG(out, 0.5f, chart, 400, 300, null);  
65             } finally {  
66                 try {  
67                     out.close();  
68                 } catch (Exception ex) {  
69                     ex.printStackTrace();  
70                 }  
71             }  
72         }  
73       
74         private static CategoryDataset getDataSet() {  
75             DefaultCategoryDataset ds = new DefaultCategoryDataset();  
76             ds.addValue(100, "北京", "苹果");  
77             ds.addValue(100, "上海", "苹果");  
78             ds.addValue(100, "广州", "苹果");  
79             ds.addValue(200, "北京", "梨子");  
80             ds.addValue(200, "上海", "梨子");  
81             ds.addValue(200, "广州", "梨子");  
82             ds.addValue(300, "北京", "葡萄");  
83             ds.addValue(300, "上海", "葡萄");  
84             ds.addValue(300, "广州", "葡萄");  
85             ds.addValue(400, "北京", "橘子");  
86             ds.addValue(400, "上海", "橘子");  
87             ds.addValue(400, "广州", "橘子");  
88             ds.addValue(500, "北京", "香蕉");  
89             ds.addValue(500, "上海", "香蕉");  
90             ds.addValue(500, "广州", "香蕉");  
91             return ds;  
92         }  
93     }

图片效果:

效果图

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原文地址：https://www.cnblogs.com/sharpest/p/6032285.html