jfreechart双轴图

男娘i 2022-09-18 08:57 169阅读 0赞

package com.javaeye.e3002;

import java.awt.Color;  
import java.awt.GradientPaint;  
import java.io.FileNotFoundException;  
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.CategoryLabelPositions;  
import org.jfree.chart.axis.NumberAxis;  
import org.jfree.chart.plot.CategoryPlot;  
import org.jfree.chart.plot.DatasetRenderingOrder;  
import org.jfree.chart.plot.PlotOrientation;  
import org.jfree.chart.renderer.category.LineAndShapeRenderer;  
import org.jfree.data.category.CategoryDataset;  
import org.jfree.data.category.DefaultCategoryDataset;  
import org.jfree.ui.ApplicationFrame;

/\*\*  
 \* 日期 2007-4-20  
 \* @author xuquanxing  
 \*/  
public class mixChart extends ApplicationFrame  
\{

public mixChart(String arg0)  
 \{  
  super(arg0);  
/\*        ChartPanel chartpanel = new ChartPanel(createChart());  
        chartpanel.setPreferredSize(new Dimension(500, 270));  
        setContentPane(chartpanel);\*/  
 \}

/\*\*  
  \*  
  \*/  
 private static final long serialVersionUID = 1L;

/\*\*  
  \* 日期 2007-4-18  
  \* @author xuquanxing  
  \* @param args void  
  \*/  
 public static void main(String\[\] args)  
 \{  
        JFreeChart  freechat =createChart();  
  FileOutputStream fos\_jpg = null;  
  try  
  \{  
   try  
   \{  
    fos\_jpg = new FileOutputStream("D://bar.jpg");  
    ChartUtilities.writeChartAsJPEG(fos\_jpg, 1, freechat, 400, 400, null);  
   \} catch (FileNotFoundException e)  
   \{  
    e.printStackTrace();  
   \} catch (IOException e)  
   \{  
    e.printStackTrace();  
   \}  
  \} finally  
  \{  
   try  
   \{  
    fos\_jpg.close();  
   \} catch (Exception e)  
   \{  
   \}  
  \}  
 \}  
   
 public static JFreeChart createChart()  
 \{  
  //创建数据集  
  CategoryDataset categorydataset  = createDataset1();  
       //创建数据集1  
        CategoryDataset categorydataset1 = createDataset2();  
       
        JFreeChart jfreechart = ChartFactory.createBarChart3D(  
                                                        "kpi",  
                                                           "index",  
                                                           "concrete",  
                                                           categorydataset1,  
                                                           PlotOrientation.VERTICAL,  
                                                           true,  
                                                           true,  
                                                           false  
                                                           );  
        
        //设置图片背景色  
        GradientPaint bgGP = new GradientPaint(0, 1000, Color.cyan, 0, 0,  
             Color.WHITE, false);  
        jfreechart.setBackgroundPaint(bgGP);  
         
        CategoryPlot categoryplot3 = (CategoryPlot) jfreechart.getPlot();  
  //      NumberAxis numberaxisbar = (NumberAxis) categoryplot3.getRangeAxis();  
//      设置最高的一个 Item 与图片顶端的距离  
 //       numberaxisbar.setUpperBound(0.15);  
 //       numberaxisbar.setLowerMargin(1000.00);  
  //      categoryplot3.setRangeAxis(numberaxisbar);  
        //System.out.println("categoryplot3.getRangeAxis()"+categoryplot3.getRangeAxis(0).getRange().getLength());  
        
        CategoryAxis categoryaxis = categoryplot3.getDomainAxis();  
       // CategoryLabelPositions.DOWN\_45 表示label样式 倾斜角度  
        categoryaxis.setCategoryLabelPositions(CategoryLabelPositions.DOWN\_45);  
        //设置标签宽度  
        categoryaxis.setMaximumCategoryLabelWidthRatio(20F);  
         
        NumberAxis numberaxis3 = new NumberAxis("value");  
        categoryplot3.setRangeAxis(1, numberaxis3);  
        categoryplot3.setDataset(1, categorydataset);//设置数据集索引  
        categoryplot3.mapDatasetToRangeAxis(1,1);//将该索引映射到axis 第一个参数指数据集的索引,第二个参数为坐标轴的索引  
        LineAndShapeRenderer lineandshaperenderer = new LineAndShapeRenderer();  
        lineandshaperenderer.setShapesVisible(true);  
         
        //设置某坐标轴索引上数据集的显示样式  
        categoryplot3.setRenderer(1, lineandshaperenderer);  
        //设置两个图的前后顺序 ，DatasetRenderingOrder.FORWARD表示后面的图在前者上面 ，DatasetRenderingOrder.REVERSE表示 表示后面的图在前者后面  
        categoryplot3.setDatasetRenderingOrder(DatasetRenderingOrder.FORWARD);  
        return jfreechart;  
 \}  
   
  /\*\*  
  \* 日期 2007-4-20  
  \* @author xuquanxing  
  \* @return CategoryDataset  折线的数据集  
  \*/  
 public static CategoryDataset createDataset1()  
     \{  
         DefaultCategoryDataset defaultcategorydataset = new DefaultCategoryDataset();  
         //改成具体指标  
         String s  = "First";  
         String s1 = "Second";  
         //改为对应的时间  
         String s2 = "Type 1";  
         String s3 = "Type 2";  
         String s4 = "Type 3";  
         String s5 = "Type 4";  
         String s6 = "Type 5";  
         String s7 = "Type 6";  
         String s8 = "Type 7";  
         String s9 = "Type 8";  
         defaultcategorydataset.addValue(1.0D, s,s2);  
         defaultcategorydataset.addValue(4D, s, s3);  
         defaultcategorydataset.addValue(3D, s, s4);  
         defaultcategorydataset.addValue(5D, s, s5);  
         defaultcategorydataset.addValue(5D, s, s6);  
         defaultcategorydataset.addValue(7D, s, s7);  
         defaultcategorydataset.addValue(7D, s, s8);  
         defaultcategorydataset.addValue(8D, s, s9);  
         //分别给每个指标 赋值  
         defaultcategorydataset.addValue(5D, s1, s2);  
         defaultcategorydataset.addValue(7D, s1, s3);  
         defaultcategorydataset.addValue(6D, s1, s4);  
         defaultcategorydataset.addValue(8D, s1, s5);  
         defaultcategorydataset.addValue(4D, s1, s6);  
         defaultcategorydataset.addValue(4D, s1, s7);  
         defaultcategorydataset.addValue(2D, s1, s8);  
         defaultcategorydataset.addValue(1.0D, s1, s9);  
         return defaultcategorydataset;  
     \}  
   
  /\*\*  
  \* 日期 2007-4-20  
  \* @author xuquanxing  
  \* @return CategoryDataset 柱状数据集  
  \*/  
 public static CategoryDataset createDataset2()  
     \{  
         DefaultCategoryDataset defaultcategorydataset = new DefaultCategoryDataset();  
         //改成具体指标  
         String s  = "Thrid";  
         String s1 = "Fourth";  
         //改为对应的时间  
         String s2 = "Type 1";  
         String s3 = "Type 2";  
         String s4 = "Type 3";  
         String s5 = "Type 4";  
         String s6 = "Type 5";  
         String s7 = "Type 6";  
         String s8 = "Type 7";  
         String s9 = "Type 8";  
         defaultcategorydataset.addValue(11D, s, s2);  
         defaultcategorydataset.addValue(14D, s, s3);  
         defaultcategorydataset.addValue(13D, s, s4);  
         defaultcategorydataset.addValue(15D, s, s5);  
         defaultcategorydataset.addValue(15D, s, s6);  
         defaultcategorydataset.addValue(17D, s, s7);  
         defaultcategorydataset.addValue(17D, s, s8);  
         defaultcategorydataset.addValue(18D, s, s9);  
         defaultcategorydataset.addValue(15D, s1, s2);  
         defaultcategorydataset.addValue(17D, s1, s3);  
         defaultcategorydataset.addValue(16D, s1, s4);  
         defaultcategorydataset.addValue(18D, s1, s5);  
         defaultcategorydataset.addValue(14D, s1, s6);  
         defaultcategorydataset.addValue(14D, s1, s7);  
         defaultcategorydataset.addValue(12D, s1, s8);  
         defaultcategorydataset.addValue(11D, s1, s9);  
         return defaultcategorydataset;  
     \}  
\}

双轴图网上例子很少，jfreecahrt自带的例子也不是这样的，弄了半天才成这样，可以直接运行，看下效果！

目前还有点疑问的是，jfree生成的图片会位于tomcat的temp文件夹下，不知该如何指定文件名

还有图片的热点问题，定位很不准确！ 待续！