java后台生成HighCharts图片

在前端通过HighCharts获取svgCode，再根据svgCode生成图片。生成的图片在插入到word文档中 freemarker, BASE64Encoder

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

1. 获取svgCode

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

2. 根据svgCode生成图片

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: 将svg字符串转换为png
     *@Author:
     *@param svgCode svg代码
     *@param pngFilePath  保存的路径
     *@throws IOException io异常
     *@throws TranscoderException svg代码异常
     */
    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: 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 ();
                }
            }
        }
    }

    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);
    }

}