HttpClient处理失败的时候重试

HttpMethodRetryHandler.java

HttpClient client = new HttpClient();

HttpMethodRetryHandler myretryhandler = new HttpMethodRetryHandler() {
    public boolean retryMethod(
        final HttpMethod method, 
        final IOException exception, 
        int executionCount) {
        if (executionCount >= 5) {
            // Do not retry if over max retry count
            return false;
        }
        if (exception instanceof NoHttpResponseException) {
            // Retry if the server dropped connection on us
            return true;
        }
        if (!method.isRequestSent()) {
            // Retry if the request has not been sent fully or
            // if it's OK to retry methods that have been sent
            return true;
        }
        // otherwise do not retry
        return false;
    }
};
        
GetMethod httpget = new GetMethod("http://www.whatever.com/");
httpget.getParams().
    setParameter(HttpMethodParams.RETRY_HANDLER, myretryhandler);
try {
    client.executeMethod(httpget);
    System.out.println(httpget.getStatusLine().toString());
} finally {
    httpget.releaseConnection();
}

http://hc.apache.org/httpclient-legacy/exception-handling.html