MultipartFile 获取上传TXT文件字数

@ResponseBody
@RequestMapping(value = "/addImgForDynamic")//(发布动态)
public Map addImgForDynamic(MultipartFile uploadFile){
Map result=new HashMap();
try {
String oo = GetFileWordCount.convertStreamToString(uploadFile.getInputStream());
System.out.println(""+oo);
System.out.println(""+oo.length());
} catch (IOException e) {
e.printStackTrace();
}

public static String convertStreamToString(InputStream inputStream){
BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
StringBuilder sb = new StringBuilder();

String line = null;
try {
while ((line = reader.readLine()) != null) {
sb.append(line + "/n");
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
inputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}

return sb.toString();
}