将输入流InputStream转换为String

public static String convertStreamToString(InputStream is) {      
 2         /*  
 3           * To convert the InputStream to String we use the BufferedReader.readLine()  
 4           * method. We iterate until the BufferedReader return null which means  
 5           * there's no more data to read. Each line will appended to a StringBuilder  
 6           * and returned as String.  
 7           */     
 8          BufferedReader reader = new BufferedReader(new InputStreamReader(is));      
 9          StringBuilder sb = new StringBuilder();      
10      
11          String line = null;      
12         try {      
13             while ((line = reader.readLine()) != null) {      
14                  sb.append(line + "\n");      
15              }      
16          } catch (IOException e) {      
17              e.printStackTrace();      
18          } finally {      
19             try {      
20                  is.close();      
21              } catch (IOException e) {      
22                  e.printStackTrace();      
23              }      
24          }      
25      
26         return sb.toString();      
27      }