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

 1 /**
 2      * 将wmf转换为svg
 3      *
 4      * @param src
 5      * @param dest
 6      */
 7     public  String wmfToSvg(InputStream insrc) {
 8         boolean compatible = false;
 9         //String resultString="";
10         try {
11             //InputStream in = new FileInputStream(src);
12             WmfParser parser = new WmfParser();
13             final SvgGdi gdi = new SvgGdi(compatible);
14             parser.parse(insrc, gdi);
15             org.w3c.dom.Document doc = gdi.getDocument();
16             StringWriter strwite=new StringWriter();
17
18             output(doc, strwite);
19             return strwite.getBuffer().toString();
20             // return resultString;
21              //getBuffer().toString();
22         } catch (Exception e) {
23             return e.getMessage();
24         }
25     }
26
27     private  void output(org.w3c.dom.Document doc, StringWriter out) throws Exception {
28         TransformerFactory factory = TransformerFactory.newInstance();
29         Transformer transformer = factory.newTransformer();
30         transformer.setOutputProperty(OutputKeys.METHOD, "xml");
31         transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
32         transformer.setOutputProperty(OutputKeys.INDENT, "yes");
33         transformer.setOutputProperty(OutputKeys.DOCTYPE_PUBLIC,
34                 "-//W3C//DTD SVG 1.0//EN");
35         transformer.setOutputProperty(OutputKeys.DOCTYPE_SYSTEM,
36                 "http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd");
37         transformer.transform(new javax.xml.transform.dom.DOMSource(doc), new StreamResult(out));
38         out.flush();
39         out.close();
40     }

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

 1 BASE64Encoder encode=new BASE64Encoder();
 2 byte[] WMF= houserow.getBlob("WMF");
 3                     if(WMF!=null&&WMF.length>0)
 4                     {
 5                         String contentString =bytetoString(WMF);
 6                         InputStream wmfStream=new StringBufferInputStream(contentString);
 7                         String svgstr=wmfToSvg(wmfStream);
 8                         ByteArrayOutputStream strwite=new ByteArrayOutputStream();
 9                         convertToPng(svgstr,strwite);
10                         byte[]lens=strwite.toByteArray();
11                         String WMF_pic="";
12                         if(svgstr != null&&!svgstr.equals(""))
13                         {
14                             WMF_pic=encode.encode(lens);
15                         }
16                         createKeyPairXML(ke12,"WMF","户型图",WMF_pic,"");
17
18                     }
19
20
21
22     /**
23      * 将svgCode转换成png文件，直接输出到流中
24      *
25      * @param svgCode svg代码
26      * @param outputStream 输出流
27      * @throws TranscoderException 异常
28      * @throws IOException io异常
29      */
30     public  void convertToPng(String svgCode, OutputStream outputStream)
31             throws TranscoderException, IOException {
32         try {
33             byte[] bytes = svgCode.getBytes("ISO-8859-1");
34             PNGTranscoder t = new PNGTranscoder();
35
36             TranscoderInput input = new TranscoderInput(new ByteArrayInputStream(bytes));
37             TranscoderOutput output = new TranscoderOutput(outputStream);
38             t.transcode(input, output);
39             outputStream.flush();
40         } finally {
41             if (outputStream != null) {
42                 try {
43                     outputStream.close();
44                 } catch (IOException e) {
45                     e.printStackTrace();
46                 }
47             }
48         }
49     }
50
51
52     public static String bytetoString(byte[] in)throws Exception{
53         InputStream is =byteTOInputStream(in);
54         return InputStreamTOString(is);
55     }
56     public static InputStream byteTOInputStream(byte[] in)throws Exception{
57
58         ByteArrayInputStream is =new ByteArrayInputStream(in);
59         return is;
60
61     }
62     public static String InputStreamTOString(InputStream in)throws Exception{
63         ByteArrayOutputStream outstream=new ByteArrayOutputStream();
64         byte[] data = new byte[in.available()];
65         int count=in.read(data,0,data.length);
66         if((count !=-1))
67         {
68             outstream.write(data, 0, count);
69         }
70         data = null;
71         String test =new String(outstream.toByteArray(),"ISO-8859-1");
72         System.out.println(test);
73         return test;
74     }
75     public static byte[] Stringtobyte(String in)throws Exception{
76         InputStream is =StringToInputStream(in);
77         return InputStreamToByte(is);
78     }
79     public static InputStream StringToInputStream(String in)throws Exception{
80         ByteArrayInputStream is =new ByteArrayInputStream(in.getBytes("ISO-8859-1"));
81         return is;
82     }
83     public static byte[] InputStreamToByte(InputStream in)throws Exception{
84         ByteArrayOutputStream outstream=new ByteArrayOutputStream();
85         byte[] data=new byte[size];
86         int count =-1;
87         while((count = in.read(data,0,size))!=-1)
88         {
89             outstream.write(data, 0, count);
90         }
91         data = null;
92         byte[] tt=outstream.toByteArray();
93         File file=new File("");
94         FileImageOutputStream pic_out= new FileImageOutputStream(file);
95         BufferedImage img=new BufferedImage(105,80,BufferedImage.TYPE_3BYTE_BGR);
96         ImageIO.write(img, "jpg", outstream);
97         return outstream.toByteArray();
98
99     }

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。