从ImputStream得到string

//intilize an InputStream    InputStream is = new ByteArrayInputStream("file content".getBytes());     //read it with BufferedReader    BufferedReader br        = new BufferedReader(        new InputStreamReader(is));     StringBuilder sb = new StringBuilder();     String line;    while ((line = br.readLine()) != null) {    sb.append(line);    }      System.out.println(sb.toString());     br.close();