Apache HttpClient设置请求超时时间和返回超时时间，以及超时重试

                // 创建http请求客户端
		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没有超时设置，会导致HttpClient阻塞，因为Http Client默认的SO_TIMEOUT是0，即一直等待。

Apache HttpClient需要设置TimeOut。两个timeout,一个是获取连接的timeout:CONNECTION_TIMEOUT，还有一个是socket的timeout，表示获取请求返回内容的超时时间SO_TIMEOUT。

setHttpRequestRetryHandler是设置请求的超时重试次数，超时了进行重试3次，true为重试开关。

上面讲的超时重试不好用，需要改成下面这种方法

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();
            }
        }
    }