java svg 转 png 学习

示例如下：

import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;import org.apache.batik.transcoder.TranscoderException;
import org.apache.batik.transcoder.TranscoderInput;
import org.apache.batik.transcoder.TranscoderOutput;
import org.apache.batik.transcoder.image.PNGTranscoder;import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;public class TestChangeImage {public static void main(String[] args) {String strImg = GetImageStr();System.out.println(strImg);
//      String strImg = "data:image/svg+xml;base64,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";
//      GenerateImage(strImg);//        base64ToImage(strImg, "c:/test5.png");try {convertToPng(strImg, "c:/test6.png");} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (TranscoderException e) {// TODO Auto-generated catch blocke.printStackTrace();}}// 图片转化成base64字符串public static String GetImageStr() {// 将图片文件转化为字节数组字符串，并对其进行Base64编码处理String imgFile = "C:/chenli.svg";// 待处理的图片InputStream in = null;byte[] data = null;// 读取图片字节数组try {in = new FileInputStream(imgFile);data = new byte[in.available()];in.read(data);in.close();} catch (IOException e) {e.printStackTrace();}// 对字节数组Base64编码BASE64Encoder encoder = new BASE64Encoder();return encoder.encode(data);// 返回Base64编码过的字节数组字符串}// base64字符串转化成图片public static boolean GenerateImage(String imgStr) { // 对字节数组字符串进行Base64解码并生成图片if (imgStr == null) // 图像数据为空return false;BASE64Decoder decoder = new BASE64Decoder();try {// Base64解码byte[] b = decoder.decodeBuffer(imgStr);for (int i = 0; i < b.length; ++i) {if (b[i] < 0) {// 调整异常数据b[i] += 256;}}// 生成jpeg图片String imgFilePath = "C:/test22.svg";// 新生成的图片OutputStream out = new FileOutputStream(imgFilePath);out.write(b);out.flush();out.close();return true;} catch (Exception e) {return false;}}/*** @Descriptionmap 对字节数组字符串进行Base64解码并生成图片* @author temdy* @Date 2015-01-26* @param base64 图片Base64数据* @param path 图片路径* @return*/public static boolean base64ToImage(String base64, String path) {// 对字节数组字符串进行Base64解码并生成图片if (base64 == null){ // 图像数据为空return false;}BASE64Decoder decoder = new BASE64Decoder();try {// Base64解码byte[] bytes = decoder.decodeBuffer(base64);for (int i = 0; i < bytes.length; ++i) {if (bytes[i] < 0) {// 调整异常数据bytes[i] += 256;}}// 生成jpeg图片OutputStream out = new FileOutputStream(path);out.write(bytes);out.flush();out.close();return true;} catch (Exception e) {return false;}}/*** 将svg字符串转换为png** @param svgCode svg代码* @param pngFilePath 保存的路径* @throws TranscoderException svg代码异常* @throws IOException io错误*/public static void convertToPng(String svgCode, String pngFilePath) throws IOException,TranscoderException {File file = new File(pngFilePath);FileOutputStream outputStream = null;try {file.createNewFile();outputStream = new FileOutputStream(file);convertToPng(svgCode, outputStream);} finally {if (outputStream != null) {try {outputStream.close();} catch (IOException e) {e.printStackTrace();}}}}/*** 将svgCode转换成png文件，直接输出到流中** @param svgCode svg代码* @param outputStream 输出流* @throws TranscoderException 异常* @throws IOException io异常*/public static void convertToPng(String svgCode, OutputStream outputStream)throws TranscoderException, IOException {try {// utf-8 解码
//            byte[] bytes = svgCode.getBytes("utf-8");// Base64解码BASE64Decoder decoder = new BASE64Decoder();byte[] bytes = decoder.decodeBuffer(svgCode);for (int i = 0; i < bytes.length; ++i) {if (bytes[i] < 0) {// 调整异常数据bytes[i] += 256;}}// 根据上面byte[]数组 生成 png 图片    PNGTranscoder t = new PNGTranscoder();TranscoderInput input = new TranscoderInput(new ByteArrayInputStream(bytes));TranscoderOutput output = new TranscoderOutput(outputStream);t.transcode(input, output);outputStream.flush();} finally {if (outputStream != null) {try {outputStream.close();} catch (IOException e) {e.printStackTrace();}}}}
}

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