嚴格模式對資源泄漏抱怨

Question

嚴格模式會投訴以下內容：資源是在附加的堆棧跟蹤中獲取的，但從未發佈。見java.io.Closeable的信息，避免資源泄漏：

**response = httpclient.execute(httpPost);** 

下面是我的代碼：

HttpClient httpclient = new DefaultHttpClient(); 

    String url = "example"; 
    HttpPost httpPost = new HttpPost(url); 

    HttpResponse response; 
    String responseString = ""; 
    try { 
     httpPost.setHeader("Content-Type", "application/json"); 

**response = httpclient.execute(httpPost);** 

     StatusLine statusLine = response.getStatusLine(); 
     if (statusLine.getStatusCode() == HttpStatus.SC_OK) { 
      ByteArrayOutputStream out = new ByteArrayOutputStream(); 
      response.getEntity().writeTo(out); 
      out.close(); 
      responseString = out.toString(); 
     } else { 
      response.getEntity().getContent().close(); 
      throw new IOException(statusLine.getReasonPhrase()); 
     } 
    } catch (ClientProtocolException e) { 
    } catch (IOException e) { 
    } 

    return responseString; 

在此先感謝。

Answer 1

由於Praful Bhatanagar指出的那樣，你需要釋放資源最後塊：

HttpClient httpclient = new DefaultHttpClient(); 
//... code skipped 
String responseString = ""; 
try { 
//... code skipped 
} catch (IOException e) { 
} finally { 
    httpClient.getConnectionManager().shutdown(); 
} 

Answer 2

對於4.3的方法所指出的kenota已被棄用。

相反的HttpClient你現在應該使用CloseableHttpClient如下圖所示：

CloseableHttpClient client= HttpClientBuilder.create().build(); 

然後你就可以使用其關閉：

client.close();