使用httpclient連接持久性

Question

我使用httpclient.execute（請求）對同一個URL執行多個請求。 我可以為連續請求重新使用連接嗎？ 如何在不重復聲明HttpClient的情況下優化代碼。

for(int i=0;i<=50;i++)
{
HttpClient client = new DefaultHttpClient();
HttpGet request = new HttpGet("my_url");
HttpResponse response = client.execute(request);
System.out.println(response.getStatusLine().getStatusCode());
}

Answer 1

為了在你的代碼中使用單個客戶端（基於Exception使用HttpRequest.execute（）：無效使用SingleClientConnManager：仍然分配連接和Lars Vogel Apache HttpClient - 教程 ）：

• 步驟1.將客戶端生成移動到for-loop 。

• 步驟2.您應該閱讀響應內容並關閉流。 如果您不這樣做，您將收到以下異常

   Exception in thread "main" java.lang.IllegalStateException: Invalid use of SingleClientConnManager: connection still allocated. 

在代碼中：

//step 1
HttpClient client = new DefaultHttpClient();
for(int i=0;i<=50;i++) {
    HttpGet request = new HttpGet("my_url");
    HttpResponse response = client.execute(request);
    System.out.println(response.getStatusLine().getStatusCode());
    //step 2
    BufferedReader br = new BufferedReader(
        new InputStreamReader(response.getEntity().getContent()));
    //since you won't use the response content, just close the stream
    br.close();
}

Answer 2

試試下面。

HttpUriRequest httpGet = new HttpGet(uri);
DefaultHttpClient defaultHttpClient = new DefaultHttpClient();
HttpResponse httpResponse = defaultHttpClient.execute(httpGet);