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。

巴特西

Flex 加载 wmf，svg

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