java background generates HighCharts pictures

Get svgCode through HighCharts on the front end, and then generate pictures according to svgCode. The generated image is inserted into the word document freemarker, BASE64Encoder

http://www.muxuanli.com:8888/lmx/blog/10

1. Get svgCode

var chart = $("#container").highcharts();
var svgCode = chart.getSVG();

2. Generate pictures according to svgCode

String svgImgPath = uploadFilePathService.getUploadFilePath()+"svg/"+salivaBox.getBarCode()+"_"+m+".png";
String svgCode = svgCodeList.get(m).replace("Highcharts.com.cn","");
SvgPngConverter.convertToPng(svgCode, svgImgPath);
params.put("image"+(m+1), SvgPngConverter.getImageBASE64Encoder(svgImgPath));

3. SvgPngConverter

import java.io. *;

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.BASE64Encoder;

/**
 * Created by lijie on 17/6/5.
 */
public class SvgPngConverter {

    /**
     *@Description: Convert svg string to png
     *@Author:
     *@param svgCode svg code
     *@param pngFilePath save path
     *@throws IOException io exception
     *@throws TranscoderException svg code exception
     */
    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 ();
                }
            }
        }
    }

    /**
     *@Description: Convert svgCode to png file and output it directly to the stream
     *@param svgCode svg code
     *@param outputStream output stream
     *@throws TranscoderException 异常
     *@throws IOException io exception
     */
    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 ();
                }
            }
        }
    }

    public static String getImageBASE64Encoder(String imagePath) {
        InputStream in = null;
        byte[] data = null;
        try {
            in = new FileInputStream(imagePath);
            data = new byte[in.available()];
            in.read(data);
            in.close();
        } catch (IOException e) {
            e.printStackTrace ();
        }
        BASE64Encoder encoder = new BASE64Encoder();
        return encoder.encode(data);
    }

}