java生成饼图svg及JFreeChart生成svg图表

package com.tellhow.svg;import java.io.File;import java.io.FileOutputStream;/** *  * @author 风絮NO.1 * */public class CakySvgWithLabel { //定义不同的颜色 static String[] colors ={"#f2e692", "#aa1111",    "#799AE1", "#3e941b",    "#66cc00", "#297110",    "#d6a97b", "#82522b",    "#aaaaff", "#1111aa",    "#ff2222", "#ffaaaa"}; static String initialize(double [] percents,String[]names){ StringBuffer sfile = new StringBuffer(); sfile.append("<?xml version='1.0' encoding='UTF-8'?>"); sfile.append("/n"); sfile.append("<svg xmlns:svg='http://www.w3.org/2000/svg'"); sfile.append("/n");  sfile.append("xmlns='http://www.w3.org/2000/svg'");  sfile.append("/n");  sfile.append("xmlns:xlink='http://www.w3.org/1999/xlink'");  sfile.append("/n");  sfile.append("xml:space='default'");  sfile.append("/n");  sfile.append("version='1.1' width='100%' height='100%' viewBox='0 0 2024 570'>");  sfile.append("/n");  sfile.append("<defs></defs>");  sfile.append("/n");  sfile.append("<g stroke-width='1' stroke='#FFFFFF' transform='matrix(1,0,0,1,16.384,-9.83)' xmlns='http://www.w3.org/2000/svg'>");  sfile.append("/n");  //循环创造path标签.  String path =creatPath(502, 300, 300, percents,names);//中心点式503,300.  sfile.append(path);  sfile.append("</g>");  sfile.append("/n");  sfile.append("</svg>"); return sfile.toString(); } /** *  * @param x0 中心点横坐标 * @param y0 中心点纵坐标 * @param r 半径 * @param percents 百分比数组 * @param names 显示颜色代表的名称 * @return */  public static String creatPath(double x0,double y0,double r,double[]percents,String[]names){  StringBuffer sfile =new StringBuffer();  double x1=0; //新扇形的x坐标  double y1=0; //新扇形的y坐标  double middleX=0; //文本显示的坐标,包括竖线显示的坐标  double middleY=0;  double radian =0; //弧度  double textRadian=0; //文本显示位置度弧度  double k=0;  int N=10;  for(int i=0;i<percents.length;i++){  if(i==0){   radian =getRadian(percents[0]);   textRadian=radian/2;   x1 = (x0+getCos(radian)*r);   y1 = (y0-getSin(radian)*r);   middleX=(x0+getCos(textRadian)*r);   middleY=(y0-getSin(textRadian)*r);   double percent = Math.round(percents[0]*100)/100.0;//获得精确到两位小数点的坐标.   k=Math.abs((middleY-y0)/(middleX-x0));//获得扇形终点的坐标,与中心点连成的直线的斜率.(取正值)   double sita= Math.atan(k);//求斜角   double lineLen=50;   double textLen=70;   if(radian<6){   lineLen=90;   textLen=110;//控制指示线的长度,与文字的位置   }   if(percents[i]!=0){//当一个类型为0时，饼图展示   if((textRadian<(Math.PI/2))){    sfile.append("<line x1='"+middleX+"' y1='"+middleY+"' x2='"+(middleX+Math.cos(sita)*lineLen)+"' y2='"+(middleY-(Math.sin(sita)*lineLen))+"' stroke='#000000'/>");    sfile.append("/n");    sfile.append("<text x='"+(middleX+Math.cos(sita)*textLen)+"' y='"+(middleY-(Math.sin(sita)*textLen))+"' space='preserve' font-family='Tahoma' font-size='21' fill='red' stroke='red' baseline-shift='baseline' >"+percent+"%</text>");   }else if ((textRadian>(Math.PI/2)&&textRadian<Math.PI)){    sfile.append("<line x1='"+middleX+"' y1='"+middleY+"' x2='"+(middleX-Math.cos(sita)*lineLen)+"' y2='"+(middleY-(Math.sin(sita)*lineLen))+"' stroke='#000000'/>");    sfile.append("/n");    sfile.append("<text x='"+(middleX-Math.cos(sita)*textLen)+"' y='"+(middleY-(Math.sin(sita)*textLen))+"' space='preserve' font-family='Tahoma' font-size='21' fill='red' stroke='red' baseline-shift='baseline' >"+percent+"%</text>");   }else if ((textRadian>(Math.PI)&&textRadian<(Math.PI*3/2))){    sfile.append("<line x1='"+middleX+"' y1='"+middleY+"' x2='"+(middleX-Math.cos(sita)*lineLen)+"' y2='"+(middleY+(Math.sin(sita)*lineLen))+"' stroke='#000000'/>");    sfile.append("/n");    sfile.append("<text x='"+(middleX-Math.cos(sita)*textLen)+"' y='"+(middleY+(Math.sin(sita)*textLen))+"' space='preserve' font-family='Tahoma' font-size='21' fill='red' stroke='red' baseline-shift='baseline' >"+percent+"%</text>");   }else if((textRadian>(Math.PI*3/2)&&textRadian<(Math.PI*2))){    sfile.append("<line x1='"+middleX+"' y1='"+middleY+"' x2='"+(middleX+Math.cos(sita)*lineLen)+"' y2='"+(middleY+Math.sin(sita)*lineLen)+"' stroke='#000000'/>");    sfile.append("/n");    sfile.append("<text x='"+(middleX+Math.cos(sita)*textLen)+"' y='"+(middleY+(Math.sin(sita)*textLen))+"' space='preserve' font-family='Tahoma' font-size='21' fill='red' stroke='red' baseline-shift='baseline' >"+percent+"%</text>");   }   sfile.append("/n");    if(getRadian(percents[0])>Math.PI){   sfile.append("<path d='M "+x0+" "+y0+" L "+(x0+r)+" "+r+" A "+r+" "+r+" 0 1 0 "+x1+" "+y1+" L "+x0+" "+y0+" z' fill='"+colors[0]+"'/>");   }else{   sfile.append("<path d='M "+x0+" "+y0+" L "+(x0+r)+" "+r+" A "+r+" "+r+" 0 0 0 "+x1+" "+y1+" L "+x0+" "+y0+" z' fill='"+colors[0]+"'/>");   }   sfile.append("/n");   }   sfile.append("<rect x='"+(x0+2*r)+"' y='"+(y0-r/2.0+N)+"' width='60' height='30' fill='"+colors[i]+"' stroke='#FFFFFF' stroke-dasharray='1,1' />");   sfile.append("/n");    sfile.append("<text x='"+(x0+2*r+80)+"' y='"+(y0-r/2.0+N+25)+"' space='preserve' font-family='宋体' font-size='28' fill='"+colors[0]+"' stroke='#000000' stroke-dasharray='1,1' baseline-shift='baseline'>"+names[0]+"</text>");   sfile.append("/n");  }else{  textRadian = radian+(getRadian(percents[i])/2);//获取指示线与X轴的弧度.  radian =radian+getRadian(percents[i]);//第i个扇形前面的弧度的总和  middleX=(x0+getCos(textRadian)*r);   middleY=(y0-getSin(textRadian)*r);   double percent = Math.round(percents[i]*100)/100.0;   k=Math.abs((middleY-y0)/(middleX-x0));   double lineLen=50;   double textLen=70;   if(radian<6){   lineLen=90;   textLen=110;   }   double sita= Math.atan(k);   if(percents[i]!=0){//当一个类型为0时，饼图展示   if((textRadian<(Math.PI/2))){    sfile.append("<line x1='"+middleX+"' y1='"+middleY+"' x2='"+(middleX+Math.cos(sita)*lineLen)+"' y2='"+(middleY-(Math.sin(sita)*lineLen))+"' stroke='#000000'/>");    sfile.append("/n");    sfile.append("<text x='"+(middleX+Math.cos(sita)*textLen)+"' y='"+(middleY-(Math.sin(sita)*textLen))+"' space='preserve' font-family='Tahoma' font-size='21' fill='red' stroke='red' baseline-shift='baseline' >"+percent+"%</text>");   }else if ((textRadian>(Math.PI/2)&&textRadian<Math.PI)){    sfile.append("<line x1='"+middleX+"' y1='"+middleY+"' x2='"+(middleX-Math.cos(sita)*lineLen)+"' y2='"+(middleY-(Math.sin(sita)*lineLen))+"' stroke='#000000'/>");    sfile.append("/n");    sfile.append("<text x='"+(middleX-Math.cos(sita)*textLen)+"' y='"+(middleY-(Math.sin(sita)*textLen))+"' space='preserve' font-family='Tahoma' font-size='21' fill='red' stroke='red' baseline-shift='baseline' >"+percent+"%</text>");   }else if ((textRadian>(Math.PI)&&textRadian<(Math.PI*3/2))){    sfile.append("<line x1='"+middleX+"' y1='"+middleY+"' x2='"+(middleX-Math.cos(sita)*lineLen)+"' y2='"+(middleY+(Math.sin(sita)*lineLen))+"' stroke='#000000'/>");    sfile.append("/n");    sfile.append("<text x='"+(middleX-Math.cos(sita)*textLen)+"' y='"+(middleY+(Math.sin(sita)*textLen))+"' space='preserve' font-family='Tahoma' font-size='21' fill='red' stroke='red' baseline-shift='baseline' >"+percent+"%</text>");   }else if((textRadian>(Math.PI*3/2)&&textRadian<(Math.PI*2))){    sfile.append("<line x1='"+middleX+"' y1='"+middleY+"' x2='"+(middleX+Math.cos(sita)*lineLen)+"' y2='"+(middleY+Math.sin(sita)*lineLen)+"' stroke='#000000'/>");    sfile.append("/n");    sfile.append("<text x='"+(middleX+Math.cos(sita)*textLen)+"' y='"+(middleY+(Math.sin(sita)*textLen))+"' space='preserve' font-family='Tahoma' font-size='21' fill='red' stroke='red' baseline-shift='baseline' >"+percent+"%</text>");   }  sfile.append("/n");  // 参数 1 表示 画大于180的弧, 0 表示画小于180的弧 (这个地方比较重要)  if(getRadian(percents[i])>Math.PI){   sfile.append("<path d='M "+x0+" "+y0+" L "+x1+" "+y1+" A "+r+" "+r+" 0 1 0 "+(x1=x0+getCos(radian)*r)+" "+(y1=y0-getSin(radian)*r)+" L "+x0+" "+y0+" z' fill='"+colors[i]+"'/>");  }else{    sfile.append("<path d='M "+x0+" "+y0+" L "+x1+" "+y1+" A "+r+" "+r+" 0 0 0 "+(x1=x0+getCos(radian)*r)+" "+(y1=y0-getSin(radian)*r)+" L "+x0+" "+y0+" z' fill='"+colors[i]+"'/>");  }  sfile.append("/n");  }  N+=50;   sfile.append("<rect x='"+(x0+2*r)+"' y='"+(y0-r/2.0+N)+"' width='60' height='30' fill='"+colors[i]+"' stroke='#FFFFFF' stroke-dasharray='1,1' />");   sfile.append("/n");    sfile.append("<text x='"+(x0+2*r+80)+"' y='"+(y0-r/2.0+N+25)+"' space='preserve' font-family='宋体' font-size='28' fill='"+colors[0]+"' stroke='#000000' stroke-dasharray='1,1' baseline-shift='baseline'>"+names[i]+"</text>");   sfile.append("/n");  }  }  return sfile.toString(); } //返回弧度 public static double getRadian(double fenshu){  return (fenshu*Math.PI)/50; } //返回正弦 public static double getSin(double radian){ return Math.sin(radian); } //返回余弦 public static double getCos(double radian){ return Math.cos(radian); } public static void main(String[] args) { int[] data= {3,64,0,284,10}; String[] names={"主变:"+data[0]+"个","断路器:"+data[1]+"个","线路:"+data[2]+"个","刀闸:"+data[3]+"个","母线:"+data[4]+"个"}; create(data,names); } private static void create(int[] data,String[] names) { try { createSVG("d:/a.svg",getPercent(data),names); } catch (Exception e) { e.printStackTrace(); } } private static double[] getPercent(int data[]){ double sum=0; double percents[] = new double[data.length]; for(int i=0;i<data.length;i++){ sum+=data[i]; } for(int i=0;i<data.length;i++){ percents[i] =(data[i]/sum)*100; } return percents; } public static void createSVG(String fileRealPath, double[] percents,String[] names) throws Exception { String sFile = initialize(percents,names); try { byte[] byteFil = sFile.getBytes("UTF-8"); File svgFile = new File(fileRealPath); if (svgFile.exists()) { svgFile.delete(); } FileOutputStream fos = new FileOutputStream(svgFile); fos.write(byteFil); fos.close(); } catch (Exception ex) { System.out.print(ex.getMessage()); } }}

package com.xj.svg;  import java.io.File; import java.io.FileOutputStream;  public class Caky3DSVG {  static String[] colors ={"#d6a97b",         "#22FF22", "#aaffaa", "#799AE1",         "#9aabEe", "#3e941b", "#f2e692",         "#66cc00", "#297110", "#d6a97b",         "#82522b", "#aaaaff", "#1111aa",         "#ff2222", "#ffaaaa", "#aa1111"         };  public static void main(String[] args) {   double data[] = {20,20,50};    try {    createSVG("f:/f.svg",getPercent(data));    } catch (Exception e) {     e.printStackTrace();    }  }  static String initialize(double [] percent){   double percents[] = {10,15,5,20,40,10};   StringBuffer sfile = new StringBuffer();   sfile.append("<?xml version='1.0' encoding='UTF-8'?>");   sfile.append("/n");   sfile.append("<svg xmlns:svg='http://www.w3.org/2000/svg'");   sfile.append("/n");   sfile.append("xmlns='http://www.w3.org/2000/svg'");   sfile.append("/n");   sfile.append("xmlns:xlink='http://www.w3.org/1999/xlink'");   sfile.append("/n");   sfile.append("xml:space='default'");   sfile.append("/n");   sfile.append("version='1.1' width='100%' height='100%' viewBox='0 0 1024 600'>");   sfile.append("/n");   sfile.append("<defs></defs>");   sfile.append("/n");   String path = createPath(502, 300,300, 150, percents);   sfile.append(path);   sfile.append("</g>");   sfile.append("/n");   sfile.append("</svg>");   return sfile.toString();  }  /**   *   * @param x0 原点 X   * @param y0 原点 Y   * @param langR   * @param shortR   * @param fenshu   * @return   */  static String createPath(double x0,double y0,double langR,double shortR ,double percents[]){   StringBuffer sfile = new StringBuffer();   double xBottom =0;   double yBottom =0;   double xBottom1=0;   double yBottom1=0;   double radian =0;   sfile.append("<g stroke-width='1' stroke='#000000' transform='matrix(1,0,0,1,1.638,-9.83)' xmlns='http://www.w3.org/2000/svg'>");   sfile.append("/n");   for(int i=0;i<percents.length;i++){    System.out.println("i:"+i);    radian =radian+getRadian(percents[i]);//第i个扇形到 第一个扇形,弧度的总和.    System.out.println("弧度2:"+radian);     if (i==0){     System.out.println("弧度1:"+radian);     if(radian==Math.PI/2){      xBottom = x0;//底面的x坐标      yBottom = y0-shortR;//底面的y坐标     }else if(radian==Math.PI*3/2){      xBottom = x0;//底面的x坐标      yBottom = y0+shortR;//底面的y坐标     } else{      double tanRadian = Math.abs(Math.tan(radian));      double sqValue=shortR*shortR+tanRadian*tanRadian*langR*langR;      if(radian<Math.PI/2){       System.out.println("if1:"+radian);       xBottom = x0+(langR*shortR)/Math.sqrt(sqValue);//底面的x坐标       yBottom = y0-(tanRadian*langR*shortR)/Math.sqrt(sqValue);//底面的y坐标      }      else if (radian>Math.PI/2&&radian<=Math.PI){       System.out.println("if2:"+radian);       xBottom =x0-(langR*shortR)/Math.sqrt(sqValue);       yBottom =y0-(tanRadian*langR*shortR)/Math.sqrt(sqValue);      }else if (radian>Math.PI&&radian<Math.PI*3/2){       System.out.println("if3:"+radian);       xBottom =x0-(langR*shortR)/Math.sqrt(sqValue);       yBottom =y0+(tanRadian*langR*shortR)/Math.sqrt(sqValue);      }else if (radian>Math.PI*3/2&&radian<Math.PI*2){       System.out.println("if4:"+radian);       xBottom = x0+(langR*shortR)/Math.sqrt(sqValue);       yBottom = y0+(tanRadian*langR*shortR)/Math.sqrt(sqValue);      }     }     if(getRadian(percents[0])>Math.PI){//大于 PI 弧度,即百分比超过50%      sfile.append("<g fill='"+colors[i]+"' >");      sfile.append("/n");      sfile.append("<path d='M "+x0+" "+y0+" L "+(x0+langR)+" "+y0+" A "+langR+" "+shortR+" 0 1 0 "+xBottom+" "+yBottom+" z' />");      sfile.append("/n");      sfile.append("<path d='M "+(x0+langR)+" "+(y0-50)+" A "+langR+" "+shortR+" 0 1 0 "+xBottom+" "+(yBottom-50)+" L "+xBottom+" "+yBottom+" A "+langR+" "+shortR+" 0 1 1 "+(x0+langR)+" "+y0+" z' />");      sfile.append("/n");      sfile.append("<path d='M "+x0+" "+(y0-50)+" L "+(x0+langR)+" "+(y0-50)+" A "+langR+" "+shortR+" 0 1 0 "+xBottom+" "+(yBottom-50)+" z' />");      sfile.append("/n");      sfile.append("</g>");      sfile.append("/n");     }else{      sfile.append("<g fill='"+colors[i]+"' >");      sfile.append("/n");      sfile.append("<path d='M "+x0+" "+y0+" L "+(x0+langR)+" "+y0+" A "+langR+" "+shortR+" 0 0 0 "+xBottom+" "+yBottom+" z' />");      sfile.append("/n");      sfile.append("<path d='M "+(x0+langR)+" "+(y0-50)+" A "+langR+" "+shortR+" 0 0 0 "+xBottom+" "+(yBottom-50)+" L "+xBottom+" "+yBottom+" A "+langR+" "+shortR+" 0 0 1 "+(x0+langR)+" "+y0+" z' />");      sfile.append("/n");      sfile.append("<path d='M "+x0+" "+(y0-50)+" L "+(x0+langR)+" "+(y0-50)+" A "+langR+" "+shortR+" 0 0 0 "+xBottom+" "+(yBottom-50)+" z' />");      sfile.append("/n");      sfile.append("</g>");      sfile.append("/n");     }     }else{     if(radian==Math.PI/2){      xBottom1= x0;//底面的x坐标      yBottom1= y0-shortR;//底面的y坐标     }else if(radian==Math.PI*3/2){      xBottom1 = x0;//底面的x坐标      yBottom1 = y0+shortR;//底面的y坐标     } else{      double tanRadian = Math.abs(Math.tan(radian));      double sqValue=shortR*shortR+tanRadian*tanRadian*langR*langR;      if(radian<Math.PI/2){       System.out.println("if1:"+radian);       xBottom1 = x0+(langR*shortR)/Math.sqrt(sqValue);//底面的x坐标       yBottom1 = y0-(tanRadian*langR*shortR)/Math.sqrt(sqValue);//底面的y坐标      }      else if (radian>Math.PI/2&&radian<=Math.PI){       System.out.println("if2:"+radian);       xBottom1 =x0-(langR*shortR)/Math.sqrt(sqValue);       yBottom1 =y0-(tanRadian*langR*shortR)/Math.sqrt(sqValue);      }else if (radian>Math.PI&&radian<Math.PI*3/2){       System.out.println("if3:"+radian);       xBottom1 =x0-(langR*shortR)/Math.sqrt(sqValue);       yBottom1 =y0+(tanRadian*langR*shortR)/Math.sqrt(sqValue);      }else if (radian>Math.PI*3/2){       System.out.println("if4:"+radian);       xBottom1 = x0+(langR*shortR)/Math.sqrt(sqValue);       yBottom1 = y0+(tanRadian*langR*shortR)/Math.sqrt(sqValue);      }     }     if(getRadian(percents[i])>Math.PI){//大于 PI 弧度,即百分比超过50%      System.out.println("大于pi");      sfile.append("<g fill='"+colors[i]+"' >");      sfile.append("/n");      sfile.append("<path d='M "+x0+" "+y0+" L "+xBottom+" "+yBottom+" A "+langR+" "+shortR+" 0 1 0 "+xBottom1+" "+yBottom1+" z' />");      sfile.append("/n");      sfile.append("<path d='M "+(xBottom)+" "+(yBottom-50)+" A "+langR+" "+shortR+" 0 1 0 "+xBottom1+" "+(yBottom1-50)+" L "+xBottom1+" "+yBottom1+" A "+langR+" "+shortR+" 0 1 1 "+xBottom+" "+yBottom+" z' />");      sfile.append("/n");      sfile.append("<path d='M "+x0+" "+(y0-50)+" L "+(xBottom)+" "+(yBottom-50)+" A "+langR+" "+shortR+" 0 1 0 "+xBottom1+" "+(yBottom1-50)+" z' />");      sfile.append("/n");      sfile.append("</g>");      sfile.append("/n");     }else{      System.out.println("小于pi");      sfile.append("<g fill='"+colors[i]+"' >");      sfile.append("/n");      sfile.append("<path d='M "+x0+" "+y0+" L "+xBottom+" "+yBottom+" A "+langR+" "+shortR+" 0 0 0 "+xBottom1+" "+yBottom1+" z' />");      sfile.append("/n");      sfile.append("<path d='M "+(xBottom)+" "+(yBottom-50)+" A "+langR+" "+shortR+" 0 0 0 "+xBottom1+" "+(yBottom1-50)+" L "+xBottom1+" "+yBottom1+" A "+langR+" "+shortR+" 0 0 1 "+xBottom+" "+yBottom+" z' />");      sfile.append("/n");      sfile.append("<path d='M "+x0+" "+(y0-50)+" L "+(xBottom)+" "+(yBottom-50)+" A "+langR+" "+shortR+" 0 0 0 "+xBottom1+" "+(yBottom1-50)+" z' />");      sfile.append("/n");      sfile.append("</g>");      sfile.append("/n");     }     xBottom=xBottom1;     yBottom=yBottom1;     }   }   return sfile.toString();  }   //返回弧度  public static double getRadian(double percent){   return (percent*Math.PI)/50;  }  //返回正弦  public static double getSin(double radian){    return Math.sin(radian);  }    //返回余弦  public static double getCos(double radian){   return Math.cos(radian);  }    private static double[] getPercent(double data[]){   double sum=0;   double percents[] = new double[data.length];   for(int i=0;i<data.length;i++){     sum+=data[i];   }   for(int i=0;i<data.length;i++){    percents[i] =(data[i]/sum)*100;   }   return percents;  }  public static void createSVG(String fileRealPath, double[] percents) throws Exception {   String sFile = initialize(percents);   try {    byte[] byteFil = sFile.getBytes("UTF-8");    File svgFile = new File(fileRealPath);    if (svgFile.exists()) {     svgFile.delete();    }    FileOutputStream fos = new FileOutputStream(svgFile);    fos.write(byteFil);    fos.close();   } catch (Exception ex) {    System.out.print(ex.getMessage());   }  } } 

三.使用Jfreechart动态生成svg图形:

import java.awt.Rectangle; import java.io.*; import org.jfree.chart.*; import org.apache.batik.dom.GenericDOMImplementation; import org.apache.batik.svggen.SVGGraphics2D; import org.jfree.data.category.CategoryDataset; import org.jfree.data.category.DefaultCategoryDataset; import org.jfree.chart.plot.*; import org.w3c.dom.DOMImplementation; import org.w3c.dom.Document; /**  * 该类用于演示最简单的柱状图生成  */ public class BarChartDemo {  public static void main(String[] args) throws IOException {   CategoryDataset dataset = getDataSet();   // 创建JFreeChart对象，在内存中间创建出对应的图像   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     dataset, // 数据集     PlotOrientation.VERTICAL, // 图表方向：水平、垂直     true, // 是否显示图例(对于简单的柱状图必须是false)     false, // 是否生成工具     false // 是否生成URL链接     );   File fo_svg = new File("D://fruit3.svg");   Rectangle bounds = new Rectangle(0,0,400,300);   exportChartAsSVG(chart,bounds,fo_svg);  }   private static void exportChartAsJPG() throws FileNotFoundException, IOException {   // 得到数据Dataset   CategoryDataset dataset = getDataSet();   // 创建JFreeChart对象，在内存中间创建出对应的图像   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     dataset, // 数据集     PlotOrientation.VERTICAL, // 图表方向：水平、垂直     true, // 是否显示图例(对于简单的柱状图必须是false)     false, // 是否生成工具     false // 是否生成URL链接     );    FileOutputStream fos_jpg = null;   try {    fos_jpg = new FileOutputStream("D:/fruit3.jpg");    ChartUtilities.writeChartAsJPEG(fos_jpg, 1, chart, 400, 300, null);   } finally {    try {     fos_jpg.close();    } catch (Exception e) {    }   }  }   /**   * 获取一个演示用的简单数据集对象   *   * @return   */  private static CategoryDataset getDataSet() {   DefaultCategoryDataset dataset = new DefaultCategoryDataset();   dataset.addValue(100, "1", "葡萄");   dataset.addValue(200, "1", "梨子");   dataset.addValue(200, "1", "荔枝");   dataset.addValue(300, "2", "葡萄");   dataset.addValue(400, "2", "梨子");   dataset.addValue(500, "2", "荔枝");   return dataset;  }   /**   * 获取一个演示用的组合数据集对象   *   * @return   */  private static CategoryDataset getDataSet2() {   DefaultCategoryDataset dataset = new DefaultCategoryDataset();   dataset.addValue(100, "北京", "苹果");   dataset.addValue(100, "上海", "苹果");   dataset.addValue(100, "广州", "苹果");   dataset.addValue(200, "北京", "梨子");   dataset.addValue(200, "上海", "梨子");   dataset.addValue(200, "广州", "梨子");   dataset.addValue(300, "北京", "葡萄");   dataset.addValue(300, "上海", "葡萄");   dataset.addValue(300, "广州", "葡萄");   dataset.addValue(400, "北京", "香蕉");   dataset.addValue(400, "上海", "香蕉");   dataset.addValue(400, "广州", "香蕉");   dataset.addValue(500, "北京", "荔枝");   dataset.addValue(500, "上海", "荔枝");   dataset.addValue(500, "广州", "荔枝");   return dataset;  }    /**   * Exports a JFreeChart to a SVG file.   *   * @param chart JFreeChart to export   * @param bounds the dimensions of the viewport   * @param svgFile the output file.   * @throws IOException if writing the svgFile fails.   */  private static void exportChartAsSVG(JFreeChart chart, Rectangle bounds, File svgFile) throws IOException {   // Get a DOMImplementation and create an XML document   DOMImplementation domImpl =    GenericDOMImplementation.getDOMImplementation();   Document document = domImpl.createDocument(null, "svg", null);    // Create an instance of the SVG Generator   SVGGraphics2D svgGenerator = new SVGGraphics2D(document);    // draw the chart in the SVG generator   chart.draw(svgGenerator, bounds);    // Write svg file   OutputStream outputStream = new FileOutputStream(svgFile);   Writer out = new OutputStreamWriter(outputStream, "UTF-8");   svgGenerator.stream(out, true /* use css */);         outputStream.flush();   outputStream.close();  } }