【转】HttpClient4基础2--通过认证代理访问网页

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]  view plain copy

1. package test.httpclient4.proxy;     
2. import java.io.BufferedReader;       
3. import java.io.IOException;     
4. import java.io.InputStreamReader;       
5. import org.apache.http.HttpEntity;       
6. import org.apache.http.HttpHost;       
7. import org.apache.http.HttpResponse;       
8. import org.apache.http.HttpStatus;     
9. import org.apache.http.auth.AuthScope;     
10. import org.apache.http.auth.UsernamePasswordCredentials;     
11. import org.apache.http.client.ClientProtocolException;     
12. import org.apache.http.client.CredentialsProvider;     
13. import org.apache.http.client.HttpClient;     
14. import org.apache.http.client.methods.HttpGet;       
15. import org.apache.http.conn.params.ConnRoutePNames;       
16. import org.apache.http.impl.client.BasicCredentialsProvider;     
17. import org.apache.http.impl.client.DefaultHttpClient;      
18. import org.apache.http.util.EntityUtils;     
19. public class GetHttpByProxyCredentials {     
20.     
21.     /**   
22.      * @param args   
23.      * @throws IOException    
24.      * @throws ClientProtocolException    
25.      */    
26.     public static void main(String[] args) throws ClientProtocolException, IOException {     
27.         //实例化一个HttpClient     
28.         HttpClient httpClient = new DefaultHttpClient();       
29.         //设定目标站点     
30.         HttpHost httpHost = new HttpHost("www.shanhe114.com");       
31.         //设置代理对象 ip/代理名称,端口     
32.         HttpHost proxy = new HttpHost("proxy.tt", 8080);     
33.         //实例化验证     
34.         CredentialsProvider credsProvider = new BasicCredentialsProvider();     
35.         //设定验证内容     
36.         UsernamePasswordCredentials creds = new UsernamePasswordCredentials("fttj", "ft07");     
37.         //创建验证     
38.         credsProvider.setCredentials(     
39.             new AuthScope(AuthScope.ANY_HOST, AuthScope.ANY_PORT),      
40.             creds);     
41.         httpClient.getParams().setParameter(ConnRoutePNames.DEFAULT_PROXY, proxy);     
42.         ((DefaultHttpClient)httpClient).setCredentialsProvider(credsProvider);     
43.                 
44.         // 目标地址       
45.         HttpGet httpget = new HttpGet("/");       
46.         // 执行       
47.         HttpResponse response = httpClient.execute(httpHost, httpget);       
48.         if(HttpStatus.SC_OK==response.getStatusLine().getStatusCode()){     
49.             //请求成功     
50.             //取得请求内容     
51.             HttpEntity entity = response.getEntity();     
52.             //显示内容     
53.             if (entity != null) {     
54.                 // 显示结果     
55.                      
56.                 System.out.println(EntityUtils.toString(entity,"utf-8"));     
57.                      
58.             }     
59.             if (entity != null) {     
60.                 entity.consumeContent();     
61.             }     
62.         }     
63.     }     
64. }