java生成饼图svg

2024-03-30 05:44•java•阅读 3040

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");

}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");

}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");

}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("\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");

}

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());

}

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