JFreeChart生成柱形图代码

  
import java.awt.Font;  
  
import javax.swing.JFrame;  
  
import org.jfree.chart.ChartFactory;  
import org.jfree.chart.ChartPanel;  
import org.jfree.chart.JFreeChart;  
import org.jfree.chart.axis.CategoryAxis;  
import org.jfree.chart.axis.ValueAxis;  
import org.jfree.chart.plot.CategoryPlot;  
import org.jfree.data.category.CategoryDataset;  
import org.jfree.data.category.DefaultCategoryDataset;  
  
public class BarChartDemo {  
  
    /** 
     * @param args 
     */  
    public static void main(String[] args) {  
  
        JFreeChart chart = ChartFactory.createBarChart("统计","水果","水果种类",getDataSet());  
  
        // 从这里开始  
        CategoryPlot plot = chart.getCategoryPlot();// 获取图表区域对象  
        CategoryAxis domainAxis = plot.getDomainAxis(); // 水平底部列表  
        domainAxis.setLabelFont(new Font("黑体",Font.BOLD,14)); // 水平底部标题  
        domainAxis.setTickLabelFont(new Font("宋体",12)); // 垂直标题  
        ValueAxis rangeAxis = plot.getRangeAxis();// 获取柱状  
        rangeAxis.setLabelFont(new Font("黑体",15));  
        chart.getLegend().setItemFont(new Font("黑体",15));  
        chart.getTitle().setFont(new Font("宋体",20));// 设置标题字体  
  
        ChartPanel chartPanel = new ChartPanel(chart,true); // 这里也可以用chartFrame,可以直接生成一个独立的Frame  
        JFrame frame=new JFrame("Java数据统计图");    
        frame.add(chartPanel);           //添加柱形图    
        frame.setBounds(50,50,900,600);    
        frame.setVisible(true);    
    }  
  
    private static CategoryDataset getDataSet() {  
        DefaultCategoryDataset dataset = new DefaultCategoryDataset();  
        dataset.addValue(100,"北京","苹果");  
        dataset.addValue(100,"上海","广州","苹果");  
        dataset.addValue(200,"梨子");  
        dataset.addValue(200,"梨子");  
        dataset.addValue(300,"葡萄");  
        dataset.addValue(300,"葡萄");  
        dataset.addValue(400,"香蕉");  
        dataset.addValue(400,"香蕉");  
        dataset.addValue(500,"荔枝");  
        dataset.addValue(500,"荔枝");  
        return dataset;  
    }  
  
}