用xml来存储图片

 

//将jpg转码，并转成String
private String readImage() {
     BufferedInputStream bis = null;
     byte[] bytes = null;
     try {
         try {
             bis = new BufferedInputStream(new FileInputStream(ix));
             bytes = new byte[bis.available()];
            bis.read(bytes);
        } finally {
            if (bis != null) {
                bis.close();
            }

        }
     } catch (FileNotFoundException e) {
        e.printStackTrace();
     } catch (IOException e) {
        e.printStackTrace();
     }
    return new BASE64Encoder().encodeBuffer(bytes);
  }

  //将图片转码后存在xml里面
  public void imageToXml() {
        String xml = "" + "<image>" + "<name>" + ix + "</name>" + "<content>"
                 + readImage() + "</content></image>";
         try {
             XMLHelper.write(XMLHelper.parseText(xml), ix + ".xml");
         } catch (DocumentException e) {
             e.printStackTrace();
         } catch (IOException e) {
             e.printStackTrace();
        }
  }

  //从xml读取图片：
  public void xmlToImage(String rename) {
         Document d;
         String name = null;
         String content = null;
         try {
             d = XMLHelper.parse(ix);
             name = XMLHelper.getNodeValue(d, "/image/name");
             content = XMLHelper.getNodeValue(d, "/image/content");
             saveImage(rename.equals("") ? name : rename, content);
        } catch (DocumentException e) {
            e.printStackTrace();
        }
    }

    public void xmlToImage() {
        xmlToImage("");
    }

    private void saveImage(String filename, String content) {
        try {
            DataOutputStream dos = null;
            try {
                byte[] bs = new BASE64Decoder().decodeBuffer(content);
                dos = new DataOutputStream(new BufferedOutputStream(
                        new FileOutputStream(filename)));
                dos.write(bs);
            } finally {
                dos.close();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }