jfreechart例子

//以前在网上找到的，别人的成果

import java.io.FileOutputStream;
import java.io.IOException;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;
 
public class ChartTest {  
 
    private static CategoryDataset getDataSet2() {  
        DefaultCategoryDataset dataset = new DefaultCategoryDataset();  
        dataset.addValue(100, "北京", "苹果");  
        dataset.addValue(150, "上海", "苹果");  
        dataset.addValue(300, "广州", "苹果");  
        dataset.addValue(240, "北京", "梨子");  
        dataset.addValue(560, "上海", "梨子");  
        dataset.addValue(200, "广州", "梨子");  
        dataset.addValue(300, "北京", "葡萄");  
        dataset.addValue(980, "上海", "葡萄");  
        dataset.addValue(900, "广州", "葡萄");  
        dataset.addValue(400, "北京", "香蕉");  
        dataset.addValue(1560, "上海", "香蕉");  
        dataset.addValue(6000, "广州", "香蕉");  
        dataset.addValue(1000, "北京", "荔枝");  
        dataset.addValue(8890, "上海", "荔枝");  
        dataset.addValue(5770, "广州", "荔枝");  
        return dataset;  
    }  
    public static void main(String[] args) throws IOException {  
        CategoryDataset dataset = getDataSet2();  
        JFreeChart chart = ChartFactory.createBarChart3D("水果产量图", "水果", "产量",  
                dataset, PlotOrientation.VERTICAL, true, false, false);  
        FileOutputStream fos_jpg = null;  
        try {  
            fos_jpg = new FileOutputStream("D:\\fruit.jpg");  
            ChartUtilities.writeChartAsJPEG(fos_jpg, 1.0f, chart, 400, 300, null);  
        } finally {  
            try {  
                fos_jpg.close();  
            } catch (Exception e) {  
            }  
        }  
    }  
}