Java实现输入流转化为String

public static String streamToString(InputStream is) {  BufferedReader reader = new BufferedReader(new InputStreamReader(is));  //new一个StringBuffer用于字符串拼接  StringBuffer sb = new StringBuffer();  String line = null;  try {    //当输入流内容读取完毕时    while ((line = reader.readLine()) != null) {       sb.append(line + "/n");    }    //记得关闭流数据 节约内存消耗    is.close();    reader.close();    return sb.toString();  } catch (IOException e) {    e.printStackTrace();  }   return null;}