java 输入流得到String

if(input != null){String strResult="";  byte[] b = new byte[1024];  int i = 0;  try {while ((i = input.read(b)) != -1) {  strResult+=new String(b);  b = new byte[1024];   }input.close();} catch (IOException e1) {// TODO Auto-generated catch blocke1.printStackTrace();} 

} 

StringBuilder strResult2 = new StringBuilder();  BufferedReader bufferReader = new BufferedReader(new InputStreamReader(input));try {String s ="";while((s = bufferReader.readLine()) != null){strResult2.append(s);}bufferReader.close();input.close();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}