Apache HttpClient設定請求逾時時間和傳回逾時時間，以及逾時重試

                // 建立http請求用戶端
		DefaultHttpClient client = new DefaultHttpClient();
		client.getParams().setIntParameter(CoreConnectionPNames.SO_TIMEOUT, 80000);
		client.getParams().setIntParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, 10000);
		client.setHttpRequestRetryHandler(new DefaultHttpRequestRetryHandler(3,true));
           

socket read沒有逾時設定，會導緻HttpClient阻塞，因為Http Client預設的SO_TIMEOUT是0，即一直等待。

Apache HttpClient需要設定TimeOut。兩個timeout,一個是擷取連接配接的timeout:CONNECTION_TIMEOUT，還有一個是socket的timeout，表示擷取請求傳回内容的逾時時間SO_TIMEOUT。

setHttpRequestRetryHandler是設定請求的逾時重試次數，逾時了進行重試3次，true為重試開關。

上面講的逾時重試不好用，需要改成下面這種方法

public class Test {
    public static void main(String[] args) throws Exception {
 
        String url = "http://localhost/jiaowu/?dsdf=sdfd";
        DefaultHttpClient client = new DefaultHttpClient();
         
        org.apache.http.params.HttpParams params = client.getParams();
        HttpConnectionParams.setConnectionTimeout(params, 5 * 1000);
        HttpConnectionParams.setSoTimeout(params, 10 * 1000);
 
        HttpGet request = new HttpGet(url);
         
        sendRequest(client,request,3);
    }
 
    static void sendRequest(HttpClient client, HttpGet request, int count) {
 
        for (int i = 0; i < count; i++) {
            try {
                System.out.println(new Date().toLocaleString());
                client.execute(request);
                break;
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }