利用JFreeChart生成简单柱状图(Java)

     package barchartdemo1;  

     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;
     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.axis.CategoryAxis;
     import org.jfree.chart.axis.NumberAxis;
     import org.jfree.chart.plot.CategoryPlot;
     import org.jfree.chart.plot.PlotOrientation;
     import org.jfree.data.category.CategoryDataset;
     import org.jfree.data.category.DefaultCategoryDataset;  

     /**
      *
      * @author Administrator
      */
     public class Main {  

         /**
          * @param args the command line arguments
          */
         public static void main(String[] args) throws IOException {
             CategoryDataset ds = getDataSet();
             JFreeChart chart = ChartFactory.createBarChart3D(
                     "水果产量图", //图表标题
                     "水果", //目录轴的显示标签
                     "产量", //数值轴的显示标签
                     ds, //数据集
                     PlotOrientation.VERTICAL, //图表方向
                     true, //是否显示图例，对于简单的柱状图必须为false
                     false, //是否生成提示工具
                     false);         //是否生成url链接  

             CategoryPlot categoryplot = (CategoryPlot) chart.getPlot();  

             NumberAxis numberaxis = (NumberAxis) categoryplot.getRangeAxis();  

             CategoryAxis domainAxis = categoryplot.getDomainAxis();  

             /*------设置X轴坐标上的文字-----------*/
             domainAxis.setTickLabelFont(new Font("sans-serif", Font.PLAIN, 11));  

             /*------设置X轴的标题文字------------*/
             domainAxis.setLabelFont(new Font("宋体", Font.PLAIN, 12));  

             /*------设置Y轴坐标上的文字-----------*/
             numberaxis.setTickLabelFont(new Font("sans-serif", Font.PLAIN, 12));  

             /*------设置Y轴的标题文字------------*/
             numberaxis.setLabelFont(new Font("黑体", Font.PLAIN, 12));  

             /*------这句代码解决了底部汉字乱码的问题-----------*/
             chart.getLegend().setItemFont(new Font("宋体", Font.PLAIN, 12));  

             /*******这句代码解决了标题汉字乱码的问题********/
             chart.getTitle().setFont(new Font("宋体", Font.PLAIN, 12));  

             FileOutputStream out = null;
             try {
                 out = new FileOutputStream("E://Items//BarChartDemo1//image//1.jpg");
                 ChartUtilities.writeChartAsJPEG(out, 0.5f, chart, 400, 300, null);
             } finally {
                 try {
                     out.close();
                 } catch (Exception ex) {
                     ex.printStackTrace();
                 }
             }
         }  

         private static CategoryDataset getDataSet() {
             DefaultCategoryDataset ds = new DefaultCategoryDataset();
             ds.addValue(100, "北京", "苹果");
             ds.addValue(100, "上海", "苹果");
             ds.addValue(100, "广州", "苹果");
             ds.addValue(200, "北京", "梨子");
             ds.addValue(200, "上海", "梨子");
             ds.addValue(200, "广州", "梨子");
             ds.addValue(300, "北京", "葡萄");
             ds.addValue(300, "上海", "葡萄");
             ds.addValue(300, "广州", "葡萄");
             ds.addValue(400, "北京", "橘子");
             ds.addValue(400, "上海", "橘子");
             ds.addValue(400, "广州", "橘子");
             ds.addValue(500, "北京", "香蕉");
             ds.addValue(500, "上海", "香蕉");
             ds.addValue(500, "广州", "香蕉");
             return ds;
         }
     }  

     package barchartdemo1;  

     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;
     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.axis.CategoryAxis;
     import org.jfree.chart.axis.NumberAxis;
     import org.jfree.chart.plot.CategoryPlot;
     import org.jfree.chart.plot.PlotOrientation;
     import org.jfree.data.category.CategoryDataset;
     import org.jfree.data.category.DefaultCategoryDataset;  

     /**
      *
      * @author Administrator
      */
     public class Main {  

         /**
          * @param args the command line arguments
          */
         public static void main(String[] args) throws IOException {
             CategoryDataset ds = getDataSet();
             JFreeChart chart = ChartFactory.createBarChart3D(
                     "水果产量图", //图表标题
                     "水果", //目录轴的显示标签
                     "产量", //数值轴的显示标签
                     ds, //数据集
                     PlotOrientation.VERTICAL, //图表方向
                     true, //是否显示图例，对于简单的柱状图必须为false
                     false, //是否生成提示工具
                     false);         //是否生成url链接  

             CategoryPlot categoryplot = (CategoryPlot) chart.getPlot();  

             NumberAxis numberaxis = (NumberAxis) categoryplot.getRangeAxis();  

             CategoryAxis domainAxis = categoryplot.getDomainAxis();  

             /*------设置X轴坐标上的文字-----------*/
             domainAxis.setTickLabelFont(new Font("sans-serif", Font.PLAIN, 11));  

             /*------设置X轴的标题文字------------*/
             domainAxis.setLabelFont(new Font("宋体", Font.PLAIN, 12));  

             /*------设置Y轴坐标上的文字-----------*/
             numberaxis.setTickLabelFont(new Font("sans-serif", Font.PLAIN, 12));  

             /*------设置Y轴的标题文字------------*/
             numberaxis.setLabelFont(new Font("黑体", Font.PLAIN, 12));  

             /*------这句代码解决了底部汉字乱码的问题-----------*/
             chart.getLegend().setItemFont(new Font("宋体", Font.PLAIN, 12));  

             /*******这句代码解决了标题汉字乱码的问题********/
             chart.getTitle().setFont(new Font("宋体", Font.PLAIN, 12));  

             FileOutputStream out = null;
             try {
                 out = new FileOutputStream("E://Items//BarChartDemo1//image//1.jpg");
                 ChartUtilities.writeChartAsJPEG(out, 0.5f, chart, 400, 300, null);
             } finally {
                 try {
                     out.close();
                 } catch (Exception ex) {
                     ex.printStackTrace();
                 }
             }
         }  

         private static CategoryDataset getDataSet() {
             DefaultCategoryDataset ds = new DefaultCategoryDataset();
             ds.addValue(100, "北京", "苹果");
             ds.addValue(100, "上海", "苹果");
             ds.addValue(100, "广州", "苹果");
             ds.addValue(200, "北京", "梨子");
             ds.addValue(200, "上海", "梨子");
             ds.addValue(200, "广州", "梨子");
             ds.addValue(300, "北京", "葡萄");
             ds.addValue(300, "上海", "葡萄");
             ds.addValue(300, "广州", "葡萄");
             ds.addValue(400, "北京", "橘子");
             ds.addValue(400, "上海", "橘子");
             ds.addValue(400, "广州", "橘子");
             ds.addValue(500, "北京", "香蕉");
             ds.addValue(500, "上海", "香蕉");
             ds.addValue(500, "广州", "香蕉");
             return ds;
         }
     }  

图片效果: