使用jetty 自帶的http client！

通常狀況下咱們須要使用HttpClient時可供選擇的技術有： 
一、HttpURLConnection 
二、Apache HttpClient 
其餘的除了寫Socket 我都沒有用過了。 

偶然的機會發現Jetty 裏面也自帶了一個HttpClient，而且支持事件觸發的處理方式。 

HttpClient client = new HttpClient();
client.setConnectorType(HttpClient.CONNECTOR_SELECT_CHANNEL);
try
{
  client.start();
}
catch (Exception e)
{
  throw new ServletException(e);
}

// create the exchange object, which lets you define where you want to go
// and what you want to do once you get a response
ContentExchange exchange = new ContentExchange()
{
  // define the callback method to process the response when you get it back
  protected void onResponseComplete() throws IOException
  {
    super.onResponseComplete();
    String responseContent = this.getResponseContent();

    // do something with the response content
    ...
  }
};

exchange.setMethod("GET");
exchange.setURL("http://www.example.com/");

// start the exchange
client.send(exchange);

 

 

public static void main(String[] args) throws Exception {
        HttpClient httpClient = new HttpClient();
        // set up httpClient
        httpClient.start();
        ContentExchange contentExchange = new ContentExchange();
        httpClient.setConnectorType(HttpClient.CONNECTOR_SELECT_CHANNEL);
        contentExchange.setURL("http://www.iteye.com");
        httpClient.send(contentExchange);
        contentExchange.waitForDone();
        System.err.println("Response status: "
                + contentExchange.getResponseStatus());
        byte[] responseContentBytes = contentExchange.getResponseContentBytes();
        System.out.println(new String (responseContentBytes,"UTF-8"));
    }