如何在Java中的HttpClient请求上设置代理主机

Question

我想HttpClient在对URL 发送请求之前设置代理。因为我能够连接curl命令来设置代理，但是使用Java代码却无法做到这一点。

卷曲命令：

**curl -I -x IP:80  URL**

在Java文件中完成代码更改：

HttpClient client = new HttpClient();
System.getProperties().put("http.proxyHost", "someProxyURL");
System.getProperties().put("http.proxyPort", "someProxyPort");
EntityEnclosingMethod method = new PostMethod(url);
method.setRequestEntity(new StringRequestEntity(requestXML, "text/xml", "utf-8"));

通过上述代码在我的java文件中的更改，我得到以下错误：

java.net.ConnectException: Connection refused (Connection refused)

这表明我无法将该URL与尝试用于连接URL的代理连接。

Answer 1

我认为这可能会有所帮助：

HttpClient client = new HttpClient();

HostConfiguration config = client.getHostConfiguration();
config.setProxy("someProxyURL", "someProxyPort");

Credentials credentials = new UsernamePasswordCredentials("username", "password");
AuthScope authScope = new AuthScope("someProxyURL", "someProxyPort");
client.getState().setProxyCredentials(authScope, credentials);

EntityEnclosingMethod method = new PostMethod(url);
method.setRequestEntity(new StringRequestEntity(requestXML, "text/xml", "utf-8"));