HttpClient4基础2--通过认证代理访问网页

http://llying.iteye.com/blog/456502

HttpClient发布4.0了 而且底层完全重写了，据说无论是效率还是结构都有质的飞跃。 
现在也要与时具进，研究研究。 

Java代码  


package test.httpclient4.proxy;  

import java.io.BufferedReader;    

import java.io.IOException;  

import java.io.InputStreamReader;    

import org.apache.http.HttpEntity;    

import org.apache.http.HttpHost;    

import org.apache.http.HttpResponse;    

import org.apache.http.HttpStatus;  

import org.apache.http.auth.AuthScope;  

import org.apache.http.auth.UsernamePasswordCredentials;  

import org.apache.http.client.ClientProtocolException;  

import org.apache.http.client.CredentialsProvider;  

import org.apache.http.client.HttpClient;  

import org.apache.http.client.methods.HttpGet;    

import org.apache.http.conn.params.ConnRoutePNames;    

import org.apache.http.impl.client.BasicCredentialsProvider;  

import org.apache.http.impl.client.DefaultHttpClient;   

import org.apache.http.util.EntityUtils;  

public class GetHttpByProxyCredentials {  

  

    /** 

     * @param args 

     * @throws IOException  

     * @throws ClientProtocolException  

     */  

    public static void main(String[] args) throws ClientProtocolException, IOException {  

        //实例化一个HttpClient  

        HttpClient httpClient = new DefaultHttpClient();    

        //设定目标站点  

        HttpHost httpHost = new HttpHost("www.shanhe114.com");    

        //设置代理对象 ip/代理名称,端口  

        HttpHost proxy = new HttpHost("proxy.tt", 8080);  

        //实例化验证  

        CredentialsProvider credsProvider = new BasicCredentialsProvider();  

        //设定验证内容  

        UsernamePasswordCredentials creds = new UsernamePasswordCredentials("fttj", "ft07");  

        //创建验证  

        credsProvider.setCredentials(  

            new AuthScope(AuthScope.ANY_HOST, AuthScope.ANY_PORT),   

            creds);  

        httpClient.getParams().setParameter(ConnRoutePNames.DEFAULT_PROXY, proxy);  

        ((DefaultHttpClient)httpClient).setCredentialsProvider(credsProvider);  

             

        // 目标地址    

        HttpGet httpget = new HttpGet("/");    

        // 执行    

        HttpResponse response = httpClient.execute(httpHost, httpget);    

        if(HttpStatus.SC_OK==response.getStatusLine().getStatusCode()){  

            //请求成功  

            //取得请求内容  

            HttpEntity entity = response.getEntity();  

            //显示内容  

            if (entity != null) {  

                // 显示结果  

                  

                System.out.println(EntityUtils.toString(entity,"utf-8"));  

                  

            }  

            if (entity != null) {  

                entity.consumeContent();  

            }  

        }  

    }  

}