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java生成饼图svg及JFreeChart生成svg图表

顺亿
顺亿
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Jfreechart本身不能生成SVG图形,但是可以借助另外一个东西,辅助生成.好像是这个:batik ，具体代码请看下文一：Java生成svg饼图,附带了一个标签显示各个颜色代表的部分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("");sfile.append("\n");sfile.append("");sfile.append("\n");sfile.append("");sfile.append("\n");sfile.append("");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("");sfile.append("\n");sfile.append("");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

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("");sfile.append("\n");sfile.append(""+percent+"%");}else if ((textRadian>(Math.PI/2)&&textRadian");sfile.append("\n");sfile.append(""+percent+"%");}else if ((textRadian>(Math.PI)&&textRadian<(Math.PI*3/2))){sfile.append("");sfile.append("\n");sfile.append(""+percent+"%");}else if((textRadian>(Math.PI*3/2)&&textRadian<(Math.PI*2))){sfile.append("");sfile.append("\n");sfile.append(""+percent+"%");}sfile.append("\n");if(getRadian(percents[0])>Math.PI){sfile.append("");}else{sfile.append("");}sfile.append("\n");}sfile.append("");sfile.append("\n");sfile.append(""+names[0]+"");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("");sfile.append("\n");sfile.append(""+percent+"%");}else if ((textRadian>(Math.PI/2)&&textRadian");sfile.append("\n");sfile.append(""+percent+"%");}else if ((textRadian>(Math.PI)&&textRadian<(Math.PI*3/2))){sfile.append("");sfile.append("\n");sfile.append(""+percent+"%");}else if((textRadian>(Math.PI*3/2)&&textRadian<(Math.PI*2))){sfile.append("");sfile.append("\n");sfile.append(""+percent+"%");}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("");}else{sfile.append("");}sfile.append("\n");}N+=50;sfile.append("");sfile.append("\n");sfile.append(""+names[i]+"");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

二.java生成SVG 3D饼图.

(这个可以生成图形,但是不完善,我没有再修改代码啦,因为觉得这个东西不值,用jfreechart可能更好.功能更强到,只是这几个程序,让我更加了解了svg这个东西,里面的一些标签都干什么用的.等等.) 3D的这个,生成的效果图,会有断层的效果,主要是出现在第一现象和第四象限,即如果第一象限或第四象限,有两个扇形的话,就会出现断层,可以用这个工具进行调整:SVGDeveloper. 用它打开svg图形,然后将断层的扇形的代码,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("");sfile.append("\n");sfile.append("");sfile.append("\n");sfile.append("");sfile.append("\n");String path = createPath(502, 300,300, 150, percents);sfile.append(path);sfile.append("");sfile.append("\n");sfile.append("");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("");sfile.append("\n");for(int i=0;i

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(radianMath.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&&radianMath.PI*3/2&&radianMath.PI){//大于 PI 弧度,即百分比超过50% sfile.append("");sfile.append("\n");sfile.append("");sfile.append("\n");sfile.append("");sfile.append("\n");sfile.append("");sfile.append("\n");sfile.append("");sfile.append("\n");}else{sfile.append("");sfile.append("\n");sfile.append("");sfile.append("\n");sfile.append("");sfile.append("\n");sfile.append("");sfile.append("\n");sfile.append("");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(radianMath.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&&radianMath.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("");sfile.append("\n");sfile.append("");sfile.append("\n");sfile.append("");sfile.append("\n");sfile.append("");sfile.append("\n");sfile.append("");sfile.append("\n");}else{System.out.println("小于pi");sfile.append("");sfile.append("\n");sfile.append("");sfile.append("\n");sfile.append("");sfile.append("\n");sfile.append("");sfile.append("\n");sfile.append("");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();}}用这个的时候需要注意两点:1 .jfreechart本身不能生成svg图形,需要用到batik .一个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,当你查看的时候不支持中文. 我记得好像是如果是安装的adobe的那个查看器,在IE里面浏览的话好像是中文乱码,如果用另外一个叫做 Renesis SVG Player ,这个查看器就是支持中文的.

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