jfreechart例子

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jfreechart

//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) {
            }
        }
    }
}