使用JFreeChart生成柱狀圖和餅圖

需要導入的jar包

650) this.width=650;" border="0" alt="" src="http://img1.51cto.com/attachment/201301/091723583.png" />

生成柱狀圖

 import java.awt.Font;
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.StandardChartTheme;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;
 /**
 * 該類用於演示最簡單的柱狀圖生成
 * @author Winter Lau
 */
 public class BarChartDemo {
     public static void main(String[] args) throws IOException{
        //創建主題樣式
         StandardChartTheme standardChartTheme=new StandardChartTheme("CN");
         //設置標題字體
         standardChartTheme.setExtraLargeFont(new Font("隸書",Font.BOLD,20));
         //設置圖例的字體
         standardChartTheme.setRegularFont(new Font("宋書",Font.PLAIN,15));
         //設置軸向的字體
         standardChartTheme.setLargeFont(new Font("宋書",Font.PLAIN,15));
         //應用主題樣式
         ChartFactory.setChartTheme(standardChartTheme);
         CategoryDataset dataset = getDataSet();
         JFreeChart chart = ChartFactory.createBarChart3D(
                            "水果產量圖", // 圖表標題
                            "水果", // 目錄軸的顯示標籤
                            "產量", // 數值軸的顯示標籤
                             dataset, // 數據集
                             PlotOrientation.VERTICAL, // 圖表方向：水平、垂直
                             true,  // 是否顯示圖例(對於簡單的柱狀圖必須是 false)
                             false, // 是否生成工具
                             false  // 是否生成 URL 鏈接
                             );

         FileOutputStream fos_jpg = null;
         try {
             fos_jpg = new FileOutputStream("D:\\fruit.jpg");
             ChartUtilities.writeChartAsJPEG(fos_jpg,chart,400,300);
         } finally {
             try {
                 fos_jpg.close();
             } catch (Exception e) {}
         }
     }
     /**
     * 獲取一個演示用的簡單數據集對象
     * @return
     */
     private static CategoryDataset getDataSet() {
         DefaultCategoryDataset dataset = new DefaultCategoryDataset();
         dataset.addValue(100, "", "蘋果");
         dataset.addValue(200, "", "梨子");
         dataset.addValue(300, "", "葡萄");
         dataset.addValue(400, "", "香蕉");
         dataset.addValue(500, "", "荔枝");
         return dataset;
     }
     /**
     * 獲取一個演示用的組合數據集對象
     * @return
     */
     private static CategoryDataset getDataSet2() {
         DefaultCategoryDataset dataset = new DefaultCategoryDataset();
         dataset.addValue(100, "北京", "蘋果");
         dataset.addValue(100, "上海", "蘋果");
         dataset.addValue(100, "廣州", "蘋果");
         dataset.addValue(200, "北京", "梨子");
         dataset.addValue(200, "上海", "梨子");
         dataset.addValue(200, "廣州", "梨子");
         dataset.addValue(300, "北京", "葡萄");
         dataset.addValue(300, "上海", "葡萄");
         dataset.addValue(300, "廣州", "葡萄");
         dataset.addValue(400, "北京", "香蕉");
         dataset.addValue(400, "上海", "香蕉");
         dataset.addValue(400, "廣州", "香蕉");
         dataset.addValue(500, "北京", "荔枝");
         dataset.addValue(500, "上海", "荔枝");
         dataset.addValue(500, "廣州", "荔枝");
         return dataset;
     }
 }

生成餅圖

 import java.awt.Font;
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.StandardChartTheme;
import org.jfree.data.general.DefaultPieDataset;
 /**
 * 用於演示餅圖的生成
 * @author Winter Lau
 */
 public class PieChartDemo {
     public static void main(String[] args) throws IOException{
        //創建主題樣式
         StandardChartTheme standardChartTheme=new StandardChartTheme("CN");
         //設置標題字體
         standardChartTheme.setExtraLargeFont(new Font("隸書",Font.BOLD,20));
         //設置圖例的字體
         standardChartTheme.setRegularFont(new Font("宋書",Font.PLAIN,15));
         //設置軸向的字體
         standardChartTheme.setLargeFont(new Font("宋書",Font.PLAIN,15));
         //應用主題樣式
         ChartFactory.setChartTheme(standardChartTheme);
         DefaultPieDataset data = getDataSet();
         JFreeChart chart = ChartFactory.createPieChart("水果產量圖",  // 圖表標題
         data,
         true, // 是否顯示圖例
         false,
         false
         );
         // 寫圖表對象到文件，參照柱狀圖生成源碼
         FileOutputStream fos_jpg = null;
         try {
             fos_jpg = new FileOutputStream("D:\\fruit.jpg");
             ChartUtilities.writeChartAsJPEG(fos_jpg,chart,400,300);
         } finally {
             try {
                 fos_jpg.close();
             } catch (Exception e) {}
         }
     }
     /**
     * 獲取一個演示用的簡單數據集對象
     * @return
     */
     private static DefaultPieDataset getDataSet() {
         DefaultPieDataset dataset = new DefaultPieDataset();
         dataset.setValue("蘋果",100);
         dataset.setValue("梨子",200);
         dataset.setValue("葡萄",300);
         dataset.setValue("香蕉",400);
         dataset.setValue("荔枝",500);
         return dataset;
     }
 }

 

本文出自 “Kenan_ITBlog” 博客，請務必保留此出處http://soukenan.blog.51cto.com/5130995/1118404