64位编码

　public String getFileBase64(String filePath) throws IOException {
  String base64Code = null;
  InputStream in = null;
  byte[] data = null;
  try{ 
            in = new FileInputStream(filePath);         
            data = new byte[in.available()]; 
            in.read(data); 
        }catch (IOException e)   { 
            e.printStackTrace(); 
        }finally {
         if(in != null) {
          in.close();
         }
        } 
        //对字节base64编码
        String tempstr = null;
        byte[] base64Data = Base64.encodeBase64(data, true);
        if(base64Data!=null){
         tempstr = new String(base64Data);
        }
        return tempstr;
 }