java后台svg转成png

1.替换img地址

/**
     * 替换img地址
     * @param str --  前台svg字符串
     * @return
     */
    private String transferImgPath(HttpServletRequest request,String str) {
        System.out.println(str);
        String requestURL = request.getRequestURL().toString();
        String requestURI = request.getRequestURI();
        String httpURL = requestURL.replace(requestURI,"");
        String ptn = "(?i)href=\"([^\"]*)\"[^>]*>";
        Pattern p = Pattern.compile(ptn, Pattern.DOTALL);
        Matcher m = p.matcher(str);
        List<String> list = new ArrayList<String>();
        while(m.find()) {
            String imgurl = m.group();
            if(!imgurl.contains("http") && !list.contains(imgurl)) {
                str = str.replaceAll(imgurl,httpURL + "/resources/myflow-min/" + imgurl);
            }
            list.add(imgurl);
        }  

        return str;
    }  

2.将svg字符串转换为png

/**
 * 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 {
        byte[] bytes = svgCode.getBytes("utf-8");
        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();
            }
        }
    }
}  

3.用的jar包

batik-all-1.7.jar
xml-apis-ext.jar

 

 原文地址：http://blog.csdn.net/u014476019/article/details/51828847