Write the content of a file (InputStream) to an String variable

InputStreamToString.java

public static String getFileContent(FileInputStream fis, String encoding ) throws IOException{
   try(BufferedReader br =new BufferedReader(new InputStreamReader(fis, encoding))){
      StringBuilder sb = new StringBuilder();
      String line;
      while(( line = br.readLine()) != null ) {
         sb.append( line );
         sb.append( '\n' );
      }
      return sb.toString();
   }
}