java生成餅圖svg及JFreeChart生成svg圖表

更新時間：2015年08月07日 14:22:34 作者：jhmyuan

java生成餅圖svg，代碼實現(xiàn)感覺有點復(fù)雜，個人認(rèn)為不如用JFreeChart，這篇文章主要介紹java生成餅圖svg及JFreeChart生成svg圖表，有需要的小伙伴可以參考下

Jfreechart本身不能生成SVG圖形,但是可以借助另外一個東西,輔助生成.好像是這個:batik ，具體代碼請看下文

一：Java生成svg餅圖,附帶了一個標(biāo)簽顯示各個顏色代表的部分

package com.tellhow.svg;
import java.io.File;
import java.io.FileOutputStream;
/**
 * 
 * @author 風(fēng)絮NO.1
 *
 */
public class CakySvgWithLabel {
 //定義不同的顏色
 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");
  //循環(huán)創(chuàng)造path標(biāo)簽.
  String path =creatPath(502, 300, 300, percents,names);//中心點式503,300.
  sfile.append(path);
  sfile.append("</g>");
  sfile.append("\n");
  sfile.append("</svg>");
 return sfile.toString();
 }
 /**
 * 
 * @param x0 中心點橫坐標(biāo)
 * @param y0 中心點縱坐標(biāo)
 * @param r 半徑
 * @param percents 百分比數(shù)組
 * @param names 顯示顏色代表的名稱
 * @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坐標(biāo)
  double y1=0; //新扇形的y坐標(biāo)
  double middleX=0; //文本顯示的坐標(biāo),包括豎線顯示的坐標(biāo)
  double middleY=0;
  double radian =0; //弧度
  double textRadian=0; //文本顯示位置度弧度
  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;//獲得精確到兩位小數(shù)點的坐標(biāo).
   k=Math.abs((middleY-y0)/(middleX-x0));//獲得扇形終點的坐標(biāo),與中心點連成的直線的斜率.(取正值)
   double sita= Math.atan(k);//求斜角
   double lineLen=50;
   double textLen=70;
   if(radian<6){
   lineLen=90;
   textLen=110;//控制指示線的長度,與文字的位置
   }
   if(percents[i]!=0){//當(dāng)一個類型為0時，餅圖展示
   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='宋體' 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);//獲取指示線與X軸的弧度.
  radian =radian+getRadian(percents[i]);//第i個扇形前面的弧度的總和
  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){//當(dāng)一個類型為0時，餅圖展示
   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");
  // 參數(shù) 1 表示 畫大于180的弧, 0 表示畫小于180的弧 (這個地方比較重要)
  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='宋體' 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={"主變:"+data[0]+"個","斷路器:"+data[1]+"個","線路:"+data[2]+"個","刀閘:"+data[3]+"個","母線:"+data[4]+"個"};
 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());
 }
 }
}

二.java生成SVG 3D餅圖.

(這個可以生成圖形,但是不完善,我沒有再修改代碼啦,因為覺得這個東西不值,用jfreechart可能更好.功能更強到,只是這幾個程序,讓我更加了解了svg這個東西,里面的一些標(biāo)簽都干什么用的.等等.) 3D的這個,生成的效果圖,會有斷層的效果,主要是出現(xiàn)在第一現(xiàn)象和第四象限,即如果第一象限或第四象限,有兩個扇形的話,就會出現(xiàn)斷層,可以用這個工具進(jìn)行調(diào)整:SVGDeveloper. 用它打開svg圖形,然后將斷層的扇形的代碼,重新倒序排列一下.

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 原點 X 
  * @param y0 原點 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個扇形到 第一個扇形,弧度的總和. 
   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坐標(biāo) 
     yBottom = y0-shortR;//底面的y坐標(biāo) 
    }else if(radian==Math.PI*3/2){ 
     xBottom = x0;//底面的x坐標(biāo) 
     yBottom = y0+shortR;//底面的y坐標(biāo) 
    } 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坐標(biāo) 
      yBottom = y0-(tanRadian*langR*shortR)/Math.sqrt(sqValue);//底面的y坐標(biāo) 
     } 
     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,即百分比超過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坐標(biāo) 
     yBottom1= y0-shortR;//底面的y坐標(biāo) 
    }else if(radian==Math.PI*3/2){ 
     xBottom1 = x0;//底面的x坐標(biāo) 
     yBottom1 = y0+shortR;//底面的y坐標(biāo) 
    } 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坐標(biāo) 
      yBottom1 = y0-(tanRadian*langR*shortR)/Math.sqrt(sqValue);//底面的y坐標(biāo) 
     } 
     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,即百分比超過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動態(tài)生成svg圖形:

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; 
/** 
 * 該類用于演示最簡單的柱狀圖生成 
 */ 
public class BarChartDemo { 
 public static void main(String[] args) throws IOException { 
  CategoryDataset dataset = getDataSet(); 
  // 創(chuàng)建JFreeChart對象，在內(nèi)存中間創(chuàng)建出對應(yīng)的圖像 
  JFreeChart chart = ChartFactory.createBarChart3D("水果產(chǎn)量圖", // 圖表標(biāo)題 
    "水果", // 目錄軸的顯示標(biāo)簽 
    "產(chǎn)量", // 數(shù)值軸的顯示標(biāo)簽 
    dataset, // 數(shù)據(jù)集 
    PlotOrientation.VERTICAL, // 圖表方向：水平、垂直 
    true, // 是否顯示圖例(對于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 
    ); 
  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 { 
  // 得到數(shù)據(jù)Dataset 
  CategoryDataset dataset = getDataSet(); 
  // 創(chuàng)建JFreeChart對象，在內(nèi)存中間創(chuàng)建出對應(yīng)的圖像 
  JFreeChart chart = ChartFactory.createBarChart3D("水果產(chǎn)量圖", // 圖表標(biāo)題 
    "水果", // 目錄軸的顯示標(biāo)簽 
    "產(chǎn)量", // 數(shù)值軸的顯示標(biāo)簽 
    dataset, // 數(shù)據(jù)集 
    PlotOrientation.VERTICAL, // 圖表方向：水平、垂直 
    true, // 是否顯示圖例(對于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:/fruit3.jpg"); 
   ChartUtilities.writeChartAsJPEG(fos_jpg, 1, chart, 400, 300, null); 
  } finally { 
   try { 
    fos_jpg.close(); 
   } catch (Exception e) { 
   } 
  } 
 } 
 
 /** 
  * 獲取一個演示用的簡單數(shù)據(jù)集對象 
  * 
  * @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; 
 } 
 
 /** 
  * 獲取一個演示用的組合數(shù)據(jù)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; 
 } 
  
 /** 
  * 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(); 
 } 
}

用這個的時候需要注意兩點:

1 .jfreechart本身不能生成svg圖形,需要用到batik .一個java工具包,apache的.

batik-awt-util.jar
batik-dom.jar
batik-svggen.jar
batik-util.jar
batik-xml.jar
jfreechart-1.0.0.jar

2.就是可能生成svg,當(dāng)你查看的時候不支持中文. 我記得好像是如果是安裝的adobe的那個查看器,在IE里面瀏覽的話好像是中文亂碼,如果用另外一個叫做 Renesis SVG Player ,這個查看器就是支持中文的.

以上內(nèi)容就是java生成餅圖svg及JFreeChart生成svg圖表的全部內(nèi)容，希望大家喜歡。

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