httpClient通过代理(Http Proxy)进行请求 
在浏览一些网站的时候由于各种原因,无法进行访问。 
这时我们需要通过IE,FireFox进行Http的代理设置, 
当然httpClient也为我们提供这样的设置 
使用匿名代理 

1. HttpClient httpClient = new
2. //设置代理服务器的ip地址和端口
3. httpClient.getHostConfiguration().setProxy("192.168.101.1", 5608);  
4. //使用抢先认证
5. httpClient.getParams().setAuthenticationPreemptive(true);


如果代理需要用户,密码进行验证 

1. HttpClient httpClient = new
2. httpClient.getHostConfiguration().setProxy("192.168.101.1", 5608);  
3. httpClient.getParams().setAuthenticationPreemptive(true);  
4. //如果代理需要密码验证,这里设置用户名密码
5. httpClient.getState().setProxyCredentials(AuthScope.ANY, new UsernamePasswordCredentials("llying.iteye.com","llying"));