java 解析 svg标签 java svg转png

转载

mob64ca14101b2f 2023-09-05 20:46:02

文章标签 java 解析 svg标签 Code SVG apache 文章分类 Java 后端开发

在网上找了一大圈方法。试过imagemagick等其他方式进行转换都无法满足需要。转换后的矢量文件有时候是无法进行编辑的，就一张图片。无法满足我的要求，这个期间查看了好多帖子,有的要就是不全，要不就是jar不给提供，只给下载，还需要积分，这个可以理解，但是偏偏花了大量积分下载下来的jar包尽然无法使用，前钱后后花了100多积分，这可是我的好不容易积攒的。可真是害死人了，太坑了。无意间看到了一个帖子上面提供了这种方式，但是也没有提供jar包和pom,但是官网是提供出来了，时间有点久忘记了那个贴子的路径了，实在不好意思，无法贴出来。最终在官方上找到了jar包，同时在maven中央仓库找到了pom文件，为了使大家不在被坑，因而贴出来，希望能少走点弯路。

如果您不要通过代码转换，可以试试网上的提供的免费连接：

https://cn.office-converter.com/SVG-to-EPS

https://convertio.co/zh/svg-eps/

如果您不差钱，我差钱（🤭），可以使用上面两个连接提供的第三方接口，每个月大概是$14.99美元，大概是人民币：106.1847人民币元

所支持的相关格式：

java 解析 svg标签 java svg转png_SVG

具体请查看相关源码：org.apache.batik.transcoder.Transcoder

pom:

<!-- https://mvnrepository.com/artifact/org.apache.xmlgraphics/batik-all -->
        <dependency>
            <groupId>org.apache.xmlgraphics</groupId>
            <artifactId>batik-all</artifactId>
            <version>1.12</version>
            <type>pom</type>
        </dependency>

     <!-- https://mvnrepository.com/artifact/org.apache.xmlgraphics/fop -->
        <dependency>
            <groupId>org.apache.xmlgraphics</groupId>
            <artifactId>fop</artifactId>
            <version>2.4</version>
        </dependency>

工具类：

import org.apache.batik.transcoder.*;
import org.apache.batik.transcoder.image.JPEGTranscoder;
import org.apache.batik.transcoder.image.PNGTranscoder;
import org.apache.batik.transcoder.image.TIFFTranscoder;
import org.apache.fop.render.ps.EPSTranscoder;
import org.apache.fop.render.ps.PSTranscoder;
import org.apache.fop.svg.AbstractFOPTranscoder;
import org.apache.fop.svg.PDFTranscoder;

import java.io.*;

/**
 *  * 利用Apache Batik实现 SVG转PDF/PNG/JPG
 */
public class SVGConverterUtils {
    public static void main(String[] args) throws Exception {
        String svgpath = "E:\\svgfile\\c.svg";
        File svgFile = new File(svgpath);
        String name = svgFile.getName();
        name = name.substring(0, name.lastIndexOf("."));
        SVGConverter converter = new SVGConverter();
//        converter.svg2PDF(new File(svgpath), new File("E:/" + name + "_SVG文件转PDF.pdf"));
//        converter.svg2PNG(new File(svgpath), new File("E:/" + name + "_SVG文件转PNG.png"));
//        converter.svg2JPEG(new File(svgpath), new File("E:/" + name + "_SVG文件转JPG.jpg"));
        String svgCode = converter.svg2String(new File(svgpath));
//        converter.svg2PDF(svgCode, "D:/" + name + "_SVG代码转PDF.pdf");
//        converter.svg2PNG(svgCode, "D:/" + name + "_SVG代码转PNG.png");
//        converter.svg2JPEG(svgCode, "D:/" + name + "_SVG代码转JPG.jpg");
//        converter.svg2PDF(svgCode, new FileOutputStream(new File("E:/svgfile/" + name + "_SVG代码转输出流.pdf")));
//        converter.svg2PNG(svgCode, new FileOutputStream(new File("E:/svgfile/" + name + "_SVG代码转输出流.png")));
//        converter.svg2JPEG(svgCode, new FileOutputStream(new File("E:/svgfile/" + name + "_SVG代码转输出流.jpg")));
//        converter.svg2EPS(svgCode, new FileOutputStream(new File("E:/svgfile/" + name + "_SVG代码转输出流.eps")));
//        converter.svg2PS(svgCode, new FileOutputStream(new File("E:/svgfile/" + name + "_SVG代码转输出流.ps")));
        converter.svgtoeps(svgCode, new FileOutputStream(new File("E:/svgfile/" + name + "_SVG代码转输出流.eps")));
    }


    public void svgtoeps(String svgCode, OutputStream os){
        EPSTranscoder epsTranscoder = new EPSTranscoder();
        try {
            svgCode = svgCode.replaceAll(":rect", "rect");
            TranscoderInput input = new TranscoderInput(new ByteArrayInputStream(svgCode.getBytes()));
            TranscoderOutput output = new TranscoderOutput(os);
            epsTranscoder.transcode(input, output);
            os.flush();
            os.close();
        } catch (Exception e) {
        }
    }


    /**
     * SVG转PNG
     *
     * @param svgCode SVG代码
     * @param outpath 输出路径
     * @throws TranscoderException
     * @throws IOException
     */
    public void svg2PNG(String svgCode, String outpath) throws TranscoderException, IOException {
        Transcoder transcoder = new PNGTranscoder();
        svgConverte(svgCode, outpath, transcoder);
    }

    /**
     * SVG转PNG
     *
     * @param svgCode SVG代码
     * @param out     输出流
     * @throws TranscoderException
     * @throws IOException
     */
    public void svg2PNG(String svgCode, OutputStream out) throws TranscoderException, IOException {
        Transcoder transcoder = new PNGTranscoder();
        svgConverte(svgCode, out, transcoder);
    }

    /**
     * SVG转PNG
     *
     * @param svgFile SVG文件
     * @param outFile 输出文件
     * @throws TranscoderException
     * @throws IOException
     */
    public void svg2PNG(File svgFile, File outFile) throws TranscoderException, IOException {
        Transcoder transcoder = new PNGTranscoder();
        svgConverte(svgFile, outFile, transcoder);
    }

    /**
     * SVG转JPG
     *
     * @param svgCode SVG代码
     * @param outpath 输出路径
     * @throws TranscoderException
     * @throws IOException
     */
    public void svg2JPEG(String svgCode, String outpath) throws TranscoderException, IOException {
        Transcoder transcoder = new JPEGTranscoder();
//为防止ERROR: The JPEG quality has not been specified. Use the default one: no compression 错误，需如下配置
        transcoder.addTranscodingHint(JPEGTranscoder.KEY_QUALITY, 0.99f);
        svgConverte(svgCode, outpath, transcoder);
    }

    /**
     * SVG转JPG
     *
     * @param svgCode SVG代码
     * @param out     输出流
     * @throws TranscoderException
     * @throws IOException
     */
    public void svg2JPEG(String svgCode, OutputStream out) throws TranscoderException, IOException {
        Transcoder transcoder = new JPEGTranscoder();
//为防止ERROR: The JPEG quality has not been specified. Use the default one: no compression 错误，需如下配置
        transcoder.addTranscodingHint(JPEGTranscoder.KEY_QUALITY, 0.99f);
        svgConverte(svgCode, out, transcoder);
    }

    /**
     * SVG转JPG
     *
     * @param svgFile SVG文件
     * @param outFile 输出文件
     * @throws TranscoderException
     * @throws IOException
     */
    public void svg2JPEG(File svgFile, File outFile) throws TranscoderException, IOException {
        Transcoder transcoder = new JPEGTranscoder();
//为防止ERROR: The JPEG quality has not been specified. Use the default one: no compression 错误，需如下配置
        transcoder.addTranscodingHint(JPEGTranscoder.KEY_QUALITY, 0.99f);
        svgConverte(svgFile, outFile, transcoder);
    }

    /**
     * SVG转PDF
     *
     * @param svgCode SVG代码
     * @param outpath 输出路径
     * @throws TranscoderException
     * @throws IOException
     */
    public void svg2PDF(String svgCode, String outpath) throws TranscoderException, IOException {
        Transcoder transcoder = new PDFTranscoder();
        svgConverte(svgCode, outpath, transcoder);
    }

    /**
     * SVG转PS
     *
     * @param svgCode
     * @param outpath
     * @throws TranscoderException
     * @throws IOException
     */
    public void svg2PS(String svgCode, String outpath) throws TranscoderException, IOException {
        Transcoder transcoder = new PSTranscoder();
        svgConverte(svgCode, outpath, transcoder);
    }

    /**
     * SVG转PS
     *
     * @param svgCode SVG代码
     * @param out     输出流
     * @throws TranscoderException
     * @throws IOException
     */
    public void svg2PS(String svgCode, OutputStream out) throws TranscoderException, IOException {
        Transcoder transcoder = new PSTranscoder();
        svgConverte(svgCode, out, transcoder);
    }

    /**
     * SVG转EPS
     *
     * @param svgCode SVG代码
     * @param out     输出流
     * @throws TranscoderException
     * @throws IOException
     */
    public void svg2EPS(String svgCode, OutputStream out) throws TranscoderException, IOException {
        Transcoder transcoder = new EPSTranscoder();
        svgConverte(svgCode, out, transcoder);
    }

    /**
     * SVG转EPS
     *
     * @param svgCode
     * @param outpath
     * @throws TranscoderException
     * @throws IOException
     */
    public void svg2EPS(String svgCode, String outpath) throws TranscoderException, IOException {
        Transcoder transcoder = new EPSTranscoder();
        svgConverte(svgCode, outpath, transcoder);
    }

    /**
     * SVG转PDF
     *
     * @param svgCode SVG代码
     * @param out     输出流
     * @throws TranscoderException
     * @throws IOException
     */
    public void svg2PDF(String svgCode, OutputStream out) throws TranscoderException, IOException {
        Transcoder transcoder = new PDFTranscoder();
        svgConverte(svgCode, out, transcoder);
    }

    /**
     * SVG转PDF
     *
     * @param svgFile SVG文件
     * @param outFile 输出文件
     * @throws TranscoderException
     * @throws IOException
     */
    public void svg2PDF(File svgFile, File outFile) throws TranscoderException, IOException {
        Transcoder transcoder = new PDFTranscoder();
        svgConverte(svgFile, outFile, transcoder);
    }

    private void svgConverte(String svgCode, String outpath, Transcoder transcoder) throws IOException, TranscoderException {
        svgConverte(svgCode, getOutputStream(outpath), transcoder);
    }

    private void svgConverte(File svg, File outFile, Transcoder transcoder) throws IOException, TranscoderException {
        svgConverte(svg2String(getInputStream(svg)), getOutputStream(outFile), transcoder);
    }

    private void svgConverte(String svgCode, OutputStream out, Transcoder transcoder) throws IOException, TranscoderException {
        svgCode = svgCode.replaceAll(":rect", "rect");
        TranscoderInput input = new TranscoderInput(new ByteArrayInputStream(svgCode.getBytes()));
        TranscoderOutput output = new TranscoderOutput(out);
        svgConverte(input, output, transcoder);
    }

    private void svgConverte(TranscoderInput input, TranscoderOutput output, Transcoder transcoder) throws IOException, TranscoderException {
        transcoder.transcode(input, output);
    }

    public InputStream getInputStream(File file) throws IOException {
        return new FileInputStream(file);
    }

    public InputStream getInputStream(String filepath) throws IOException {
        File file = new File(filepath);
        if (file.exists())
            return getInputStream(file);
        else
            return null;
    }

    public OutputStream getOutputStream(File outFile) throws IOException {
        return new FileOutputStream(outFile);
    }

    public OutputStream getOutputStream(String outpath) throws IOException {
        File file = new File(outpath);
        if (!file.exists())
            file.createNewFile();
        return getOutputStream(file);
    }

    /**
     * 默认使用编码UTF-8 SVG文件输入流转String 
     *
     * @param svgFile
     * @return SVG代码
     * @throws IOException 
     */
    public String svg2String(File svgFile) throws IOException {
        InputStream in = getInputStream(svgFile);
        return svg2String(in, "UTF-8");
    }

    /**
     * SVG文件输入流转String 
     *
     * @param svgFile
     * @return SVG代码
     * @throws IOException 
     */
    public String svg2String(File svgFile, String charset) throws IOException {
        InputStream in = getInputStream(svgFile);
        return svg2String(in, charset);
    }

    /**
     * 默认使用编码UTF-8SVG输入流转String 
     *
     * @param in
     * @return SVG代码
     */
    public String svg2String(InputStream in) {
        return svg2String(in, "UTF-8");
    }

    /**
     * 指定字符集SVG输入流转String
     *
     * @param in      输入流
     * @param charset 字符编码
     * @return SVG代码
     */
    public String svg2String(InputStream in, String charset) {
        StringBuffer svgBuffer = new StringBuffer();
        BufferedReader bfr = null;
        try {
            InputStreamReader inputStreamReader = new InputStreamReader(in, charset);
            bfr = new BufferedReader(inputStreamReader);
            String line = "";
            while ((line = bfr.readLine()) != null) {
                svgBuffer.append(line);
            }
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                if (bfr != null)
                    bfr.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return svgBuffer.toString();
    }
}

注意：目前遇到的问题是svg转成eps文件可以成功，但是转出来的eps颜色会丢，查询官网目前还没有解决，如果解决了后续会修改掉。

参考：

https://xmlgraphics.apache.org/fop/

https://xmlgraphics.apache.org/batik/

issues:

https://issues.apache.org/jira/projects/FOP/issues/FOP-1487?filter=allopenissues

本文章为转载内容，我们尊重原作者对文章享有的著作权。如有内容错误或侵权问题，欢迎原作者联系我们进行内容更正或删除文章。