Flex 加载 wmf，svg

  最近做gis系统发现要在flex加载wmf图片。我记得flash的loader只能是png，gis，jpg。wmf格式居然是window出的，flash居然不支持我也是醉了，没办法，只能后台转格式，首先wmf是矢量的格式，我先想到的是svg。刚好java的batick包可以支持wmf

转svg。 代码如下

/**
     * 将wmf转换为svg
     * 
     * @param src
     * @param dest
     */
    public  String wmfToSvg(InputStream insrc) {
        boolean compatible = false;
        //String resultString="";
        try {
            //InputStream in = new FileInputStream(src);
            WmfParser parser = new WmfParser();
            final SvgGdi gdi = new SvgGdi(compatible);
            parser.parse(insrc, gdi);    
            org.w3c.dom.Document doc = gdi.getDocument();
            StringWriter strwite=new StringWriter();
        
            output(doc, strwite);
            return strwite.getBuffer().toString();
            // return resultString;
             //getBuffer().toString();
        } catch (Exception e) {
            return e.getMessage();
        }
    }
    
    private  void output(org.w3c.dom.Document doc, StringWriter out) throws Exception {
        TransformerFactory factory = TransformerFactory.newInstance();
        Transformer transformer = factory.newTransformer();
        transformer.setOutputProperty(OutputKeys.METHOD, "xml");
        transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
        transformer.setOutputProperty(OutputKeys.INDENT, "yes");
        transformer.setOutputProperty(OutputKeys.DOCTYPE_PUBLIC,
                "-//W3C//DTD SVG 1.0//EN");
        transformer.setOutputProperty(OutputKeys.DOCTYPE_SYSTEM,
                "http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd");
        transformer.transform(new javax.xml.transform.dom.DOMSource(doc), new StreamResult(out));
        out.flush();
        out.close();
    }

  Flex的svg包其实很多地方都有，as3svgrendererlib-master用的比较多，github上可以搜的到。我测试了网上的wmf都可以没啥问题，但是系统wmf是楼房基底图，导出来图片中某些字会叠加到一个角落里面，我去这怎么回事，搞了大半天也没发现什么问题

只能是先用png，wmf格式难道种类好多？之前flex 加载tiff的时候就发现tiff格式太多 作罢。

 这是改为png的流输出

BASE64Encoder encode=new BASE64Encoder();
byte[] WMF= houserow.getBlob("WMF");                
                    if(WMF!=null&&WMF.length>0)
                    {
                        String contentString =bytetoString(WMF);
                        InputStream wmfStream=new StringBufferInputStream(contentString);
                        String svgstr=wmfToSvg(wmfStream);
                        ByteArrayOutputStream strwite=new ByteArrayOutputStream();     
                        convertToPng(svgstr,strwite);
                        byte[]lens=strwite.toByteArray();
                        String WMF_pic="";
                        if(svgstr != null&&!svgstr.equals(""))
                        {
                            WMF_pic=encode.encode(lens);
                        }    
                        createKeyPairXML(ke12,"WMF","户型图",WMF_pic,"");    
                        
                    }

    
    
    /**
     * 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  void convertToPng(String svgCode, OutputStream outputStream)
            throws TranscoderException, IOException {
        try {
            byte[] bytes = svgCode.getBytes("ISO-8859-1");
            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 bytetoString(byte[] in)throws Exception{
        InputStream is =byteTOInputStream(in);
        return InputStreamTOString(is);
    }
    public static InputStream byteTOInputStream(byte[] in)throws Exception{
    
        ByteArrayInputStream is =new ByteArrayInputStream(in);
        return is;
        
    }
    public static String InputStreamTOString(InputStream in)throws Exception{
        ByteArrayOutputStream outstream=new ByteArrayOutputStream();
        byte[] data = new byte[in.available()];
        int count=in.read(data,0,data.length);
        if((count !=-1))
        {
            outstream.write(data, 0, count);
        }
        data = null;
        String test =new String(outstream.toByteArray(),"ISO-8859-1");
        System.out.println(test);
        return test;    
    }
    public static byte[] Stringtobyte(String in)throws Exception{
        InputStream is =StringToInputStream(in);
        return InputStreamToByte(is);
    }
    public static InputStream StringToInputStream(String in)throws Exception{
        ByteArrayInputStream is =new ByteArrayInputStream(in.getBytes("ISO-8859-1"));
        return is;
    }
    public static byte[] InputStreamToByte(InputStream in)throws Exception{
        ByteArrayOutputStream outstream=new ByteArrayOutputStream();
        byte[] data=new byte[size];
        int count =-1;
        while((count = in.read(data,0,size))!=-1)
        {
            outstream.write(data, 0, count);
        }
        data = null;
        byte[] tt=outstream.toByteArray();
        File file=new File("");
        FileImageOutputStream pic_out= new FileImageOutputStream(file);
        BufferedImage img=new BufferedImage(105,80,BufferedImage.TYPE_3BYTE_BGR); 
        ImageIO.write(img, "jpg", outstream);
        return outstream.toByteArray();
        
    }

   之后会补一篇加载tiff和dwg的文章，这些格式都是gis系统经常用到的，虽然拿FME来处理也不错，那玩意正版要几十万，还是算了。