httpClient.getConnectionManager() 已弃用-应该改用什么？答案

【问题标题】：httpClient.getConnectionManager() is deprecated - what should be used instead?httpClient.getConnectionManager() 已弃用-应该改用什么？
【发布时间】：2014-01-09 21:19:05
【问题描述】：

我继承了代码

import org.apache.http.client.HttpClient;
...
HttpClient httpclient = createHttpClientOrProxy();

    try {
        HttpPost postRequest = postRequest(data, url);
        body = readResponseIntoBody(body, httpclient, postRequest);
    } catch( IOException ioe ) {
        throw new RuntimeException("Cannot post/read", ioe);
    } finally {
        httpclient.getConnectionManager().shutdown();  // ** Deprecated
    }


private HttpClient createHttpClientOrProxy() {
    HttpClient httpclient = new DefaultHttpClient();

    /*
     * Set an HTTP proxy if it is specified in system properties.
     * 
     * http://docs.oracle.com/javase/6/docs/technotes/guides/net/proxies.html
     * http://hc.apache.org/httpcomponents-client-ga/httpclient/examples/org/apache/http/examples/client/ClientExecuteProxy.java
     */
    if( isSet(System.getProperty("http.proxyHost")) ) {
        log.warn("http.proxyHost = " + System.getProperty("http.proxyHost") );
        log.warn("http.proxyPort = " + System.getProperty("http.proxyPort"));
        int port = 80;
        if( isSet(System.getProperty("http.proxyPort")) ) {
            port = Integer.parseInt(System.getProperty("http.proxyPort"));
        }
        HttpHost proxy = new HttpHost(System.getProperty("http.proxyHost"), port, "http");
// @Deprecated methods here... getParams() and ConnRoutePNames
        httpclient.getParams().setParameter(ConnRoutePNames.DEFAULT_PROXY, proxy);
    }
    return httpclient;
}

getConnectionManager() 读作“

@Deprecated
ClientConnectionManager getConnectionManager()

Deprecated. (4.3) use HttpClientBuilder.
Obtains the connection manager used by this client.

HttpClientBuilder 的文档似乎很少，简单地说：

Builder for CloseableHttpClient instances.

但是，如果我将 HttpClient 替换为 CloseableHttpClient，则该方法似乎仍然是 @Deprecated。

如何使用非弃用方法？

【问题讨论】：

你想做什么？获取ClientConnectionManager？为什么？
你能发布更多代码吗？就像httpClient 的初始化方式一样。
我已经发布了用于创建 HttpClient 的代码。我无法回答“为什么”，因为我没有编写原始代码。
你能解释一下吗？ httpclient.getConnectionManager().shutdown();。我为 HttpClientBuilder 创建了对象 httpclient = HttpClientBuilder.create();我们如何修改与httpclient 4.3.3 jar相关的
未弃用：developer.android.com/reference/org/apache/http/client/…

标签： java apache http

【解决方案1】：

不要创建 HttpClient 的新实例，而是使用 Builder。你会得到一个CloseableHttpClient。

例如用法：

CloseableHttpClient httpClient = HttpClientBuilder.create().setProxy(proxy).build()

不要使用getConnectionManager().shutdown()，而是在CloseableHttpClient 上使用close() 方法。

【讨论】：