HttpClient4.3.1簡單入門執行個體 轉

標籤：

public class HttpClientTest {  

•     public static void main(String args[]) {  
•         //建立HttpClientBuilder  
•         HttpClientBuilder httpClientBuilder = HttpClientBuilder.create();  
•         //HttpClient  
•         CloseableHttpClient closeableHttpClient = httpClientBuilder.build();  
•   
•         HttpGet httpGet = new HttpGet("http://www.gxnu.edu.cn/default.html");  
•         System.out.println(httpGet.getRequestLine());  
•         try {  
•             //執行get請求  
•             HttpResponse httpResponse = closeableHttpClient.execute(httpGet);  
•             //擷取響應訊息實體  
•             HttpEntity entity = httpResponse.getEntity();  
•             //響應狀態  
•             System.out.println("status:" + httpResponse.getStatusLine());  
•             //判斷響應實體是否為空白  
•             if (entity != null) {  
•                 System.out.println("contentEncoding:" + entity.getContentEncoding());  
•                 System.out.println("response content:" + EntityUtils.toString(entity));  
•             }  
•         } catch (IOException e) {  
•             e.printStackTrace();  
•         } finally {  
•             try {  

public class HttpClientTest {    public static void main(String args[]) {        //建立HttpClientBuilder        HttpClientBuilder httpClientBuilder = HttpClientBuilder.create();        //HttpClient        CloseableHttpClient closeableHttpClient = httpClientBuilder.build();        HttpGet httpGet = new HttpGet("http://www.gxnu.edu.cn/default.html");        System.out.println(httpGet.getRequestLine());        try {            //執行get請求            HttpResponse httpResponse = closeableHttpClient.execute(httpGet);            //擷取響應訊息實體            HttpEntity entity = httpResponse.getEntity();            //響應狀態            System.out.println("status:" + httpResponse.getStatusLine());            //判斷響應實體是否為空白            if (entity != null) {                System.out.println("contentEncoding:" + entity.getContentEncoding());                System.out.println("response content:" + EntityUtils.toString(entity));            }        } catch (IOException e) {            e.printStackTrace();        } finally {            try {

[java] view plaincopyprint?

1.             //關閉流並釋放資源  
2.             closeableHttpClient.close();  
3.         } catch (IOException e) {  
4.             e.printStackTrace();  
5.         }  
6.     }  
7. }  

                //關閉流並釋放資源                closeableHttpClient.close();            } catch (IOException e) {                e.printStackTrace();            }        }    }}

 

 

以下內容來自HttpClient4.3.1 API文檔：http://hc.apache.org/httpcomponents-client-ga/httpclient/apidocs/overview-summary.html

2、HttpClientBuilder

HttpClientBuilder用於建立CloseableHttpClient執行個體。看了一下API文檔，AbstractHttpClient、 AutoRetryHttpClient、 DefaultHttpClient等都被棄用了，使用HttpClientBuilder代替。

3、CloseableHttpClient

實現介面：Closeable, AutoCloseable, HttpClient；子類：AbstractHttpClient

4、HttpGet

非安全執行緒；HttpGet有三個構造方法：HttpGet()、HttpGet(String uri)、HttpGet(URI uri)

5、HttpResponse

伺服器在接收和解釋請求之後返回一個HTTP響應資訊

 

     Response      = Status-Line                     *(( general-header                      | response-header                      | entity-header ) CRLF)                     CRLF                     [ message-body ]

HttpClient4.3.1簡單入門執行個體 轉