1.(StringBuffer+InputStreamReader+BufferedReader )，不推荐使用，BufferedReader在readLine（） 时会在读取到换行符时直接返回，然后读取下一行，会丢失换行符（what fk is that？）。

public String inputStreamString (InputStream in) throws IOException {  String tempLine="";  StringBuffer resultBuffer = new StringBuffer();  InputStreamReader inputStreamReader = new InputStreamReader(in);  BufferedReader reader = new BufferedReader(inputStreamReader);  while ((tempLine = reader.readLine()) != null) {    resultBuffer.append(tempLine);  }  return  resultBuffer.toString();}复制代码

2.(ByteArrayOutputStream)推荐使用

public String intputStreamString2(InputStream inputStream){  ByteArrayOutputStream baos = new ByteArrayOutputStream();  int i=-1;  try {    while((i=inputStream.read())!=-1){      baos.write(i);    }    return baos.toString();  } catch (IOException e) {    e.printStackTrace();  }  return "";}复制代码