1、httpclient请求类
代理demo：http://hc.apache.org/httpcomponents-client-4.3.x/httpclient/examples/org/apache/http/examples/client/ClientExecuteProxy.java
2、I/O exception (java.net.SocketException) caught when processing request: Connect
http://luan.iteye.com/blog/1820054
原文：http://www.cnblogs.com/draem0507/p/5390291.html