String --> InputStream

InputStream String2InputStream(String str){   ByteArrayInputStream stream = new ByteArrayInputStream(str.getBytes());   return stream;}

InputStream --> String

String inputStream2String(InputStream is){   BufferedReader in = new BufferedReader(new InputStreamReader(is));   StringBuffer buffer = new StringBuffer();   String line = "";   while ((line = in.readLine()) != null){     buffer.append(line);   }   return buffer.toString();}