Java 无法在android中使用cachingHttpClient缓存HttpResponse

这对我不起作用

每次它都从服务器获取数据，而不是从缓存获取数据

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我使用的是jar-httpclient-cache-4.1-beta1。

您还没有向我们展示您的HTTP服务器的运行情况。mydomain.com/content上的服务是否在HTTP响应上设置了正确的缓存控制头？为了使缓存工作，您需要让HTTP服务器或web应用程序指示是否可以缓存数据，以及可以使用适当的头缓存数据的长度

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此外，请检查CachingHttpClient上记录的API，以查看它希望从web服务器获得哪些头

在用php编写的web应用程序中需要设置哪些参数，在服务器端的请求和响应中需要设置哪些参数。以及如何处理我的android中的缓存。我已经添加了从我的android代码中删除Header的代码。即使是它返回的cache_miss。您可以共享CachingHttpClient的链接吗？它似乎不在Android SDK中。没关系，是从。我也有同样的问题。

public class CacheDemo {

public static void main(String[] args) {
    CacheConfig cacheConfig = new CacheConfig();
    cacheConfig.setMaxCacheEntries(1000);
    cacheConfig.setMaxObjectSizeBytes(1024 * 1024);

    HttpClient cachingClient = new CachingHttpClient(new DefaultHttpClient(), cacheConfig);

    HttpContext localContext = new BasicHttpContext();

    sendRequest(cachingClient, localContext);
    CacheResponseStatus responseStatus = (CacheResponseStatus) localContext.getAttribute(
            CachingHttpClient.CACHE_RESPONSE_STATUS);
    checkResponse(responseStatus);


    sendRequest(cachingClient, localContext);
    responseStatus = (CacheResponseStatus) localContext.getAttribute(
            CachingHttpClient.CACHE_RESPONSE_STATUS);
    checkResponse(responseStatus);
}

static void sendRequest(HttpClient cachingClient, HttpContext localContext) {
    HttpGet httpget = new HttpGet("http://www.mydomain.com/content/");
    HttpResponse response = null;
    try {
        response = cachingClient.execute(httpget, localContext);
    } catch (ClientProtocolException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
    } catch (IOException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
    }
    HttpEntity entity = response.getEntity();
    try {
        EntityUtils.consume(entity);
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

}

static void checkResponse(CacheResponseStatus responseStatus) {
    switch (responseStatus) {
        case CACHE_HIT:
            System.out.println("A response was generated from the cache with no requests "
                    + "sent upstream");
            break;
        case CACHE_MODULE_RESPONSE:
            System.out.println("The response was generated directly by the caching module");
            break;
        case CACHE_MISS:
            System.out.println("The response came from an upstream server");
            break;
        case VALIDATED:
            System.out.println("The response was generated from the cache after validating "
                    + "the entry with the origin server");
            break;
    }
}

}