httpclient4.X 设置代理请求（包含账号密码）

        最近需要使用Httpclient做后台请求，使用的是httpclient4.3版本，apache网站上有，我这里就不提供下载链接了，搜一下就可以了，废话少说，直接上代码：

Java代码  


import java.util.ArrayList;  

import java.util.List;  

  

import org.apache.http.HttpEntity;  

import org.apache.http.HttpHost;  

import org.apache.http.NameValuePair;  

import org.apache.http.client.config.RequestConfig;  

import org.apache.http.client.entity.UrlEncodedFormEntity;  

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

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

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

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

import org.apache.http.message.BasicNameValuePair;  

import org.apache.http.util.EntityUtils;  

  

public class HttpClientTest {  

    public static void main(String args[]) throws Exception {  

        // 创建HttpClientBuilder  

        HttpClientBuilder httpClientBuilder = HttpClientBuilder.create();  

        // HttpClient  

        CloseableHttpClient closeableHttpClient = httpClientBuilder.build();  

        // 依次是目标请求地址，端口号,协议类型  

        HttpHost target = new HttpHost("10.10.100.102:8080/mytest", 8080,  

                "http");  

        // 依次是代理地址，代理端口号，协议类型  

        HttpHost proxy = new HttpHost("yourproxy", 8080, "http");  

        RequestConfig config = RequestConfig.custom().setProxy(proxy).build();  

  

        // 请求地址  

        HttpPost httpPost = new HttpPost("http://10.10.100.102:8080/mytest");  

        httpPost.setConfig(config);  

        // 创建参数队列  

        List<NameValuePair> formparams = new ArrayList<NameValuePair>();  

        // 参数名为pid，值是2  

        formparams.add(new BasicNameValuePair("pid", "2"));  

  

        UrlEncodedFormEntity entity;  

        try {  

            entity = new UrlEncodedFormEntity(formparams, "UTF-8");  

            httpPost.setEntity(entity);  

            CloseableHttpResponse response = closeableHttpClient.execute(  

                    target, httpPost);  

            // getEntity()  

            HttpEntity httpEntity = response.getEntity();  

            if (httpEntity != null) {  

                // 打印响应内容  

                System.out.println("response:"  

                        + EntityUtils.toString(httpEntity, "UTF-8"));  

            }  

            // 释放资源  

            closeableHttpClient.close();  

        } catch (Exception e) {  

            e.printStackTrace();  

        }  

    }  

}  



 

       那么，如何设置代理服务器的用户名和密码？请看如下代码：

[java]
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HttpHost proxy = new HttpHost("proxy", 8080);  
  
BasicScheme proxyAuth = new BasicScheme();  
// Make client believe the challenge came form a proxy  
proxyAuth.processChallenge(new BasicHeader(AUTH.PROXY_AUTH, "BASIC realm=default"));  
BasicAuthCache authCache = new BasicAuthCache();  
authCache.put(proxy, proxyAuth);  
  
CredentialsProvider credsProvider = new BasicCredentialsProvider();  
credsProvider.setCredentials(  
        new AuthScope(proxy),  
        new UsernamePasswordCredentials("username", "password"));  
  
HttpClientContext context = HttpClientContext.create();  
context.setAuthCache(authCache);  
context.setCredentialsProvider(credsProvider);  
  
CloseableHttpClient httpclient = HttpClients.createDefault();  
try {  
    CloseableHttpResponse response = httpclient.execute(new HttpGet("/stuff"), context);  
    try {  
        // ...  
    } finally {  
        response.close();  
    }  
} finally {  
    httpclient.close();  
}  

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

BasicScheme proxyAuth = new BasicScheme();
// Make client believe the challenge came form a proxy
proxyAuth.processChallenge(new BasicHeader(AUTH.PROXY_AUTH, "BASIC realm=default"));
BasicAuthCache authCache = new BasicAuthCache();
authCache.put(proxy, proxyAuth);

CredentialsProvider credsProvider = new BasicCredentialsProvider();
credsProvider.setCredentials(
new AuthScope(proxy),
new UsernamePasswordCredentials("username", "password"));

HttpClientContext context = HttpClientContext.create();
context.setAuthCache(authCache);
context.setCredentialsProvider(credsProvider);

CloseableHttpClient httpclient = HttpClients.createDefault();
try {
CloseableHttpResponse response = httpclient.execute(new HttpGet("/stuff"), context);
try {
// ...
} finally {
response.close();
}
} finally {
httpclient.close();
}

       使用代理需要导入：commons-logging-1.1.jar，httpclient-4.0-beta2.jar ，httpcore-4.1-alpha1.jar 和 commons-codec-1.4.jar架包。在连接代理时需要使用用户名和密码构造UsernamePasswordCredentials对象并作为参数传递给HttpClient对象。

 

具体用法如下：

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public static void main(String args[])  
{  
 StringBuffer sb = new StringBuffer();  
 //创建HttpClient实例  
 HttpClient client = getHttpClient();  
 //创建httpGet  
 HttpGet httpGet = new HttpGet("http://www.csdn.net");  
 //执行  
 try {  
  HttpResponse response = client.execute(httpGet);  
    
  HttpEntity entry = response.getEntity();  
    
  if(entry != null)  
  {  
   InputStreamReader is = new InputStreamReader(entry.getContent());  
   BufferedReader br = new BufferedReader(is);  
   String str = null;  
   while((str = br.readLine()) != null)  
   {  
    sb.append(str.trim());  
   }  
   br.close();  
  }  
    
 } catch (ClientProtocolException e) {  
  // TODO Auto-generated catch block  
  e.printStackTrace();  
 } catch (IOException e) {  
  // TODO Auto-generated catch block  
  e.printStackTrace();  
 }  
 System.out.println(sb.toString());  
}  
//设置代理  
public static HttpClient getHttpClient() {  
 DefaultHttpClient httpClient = new DefaultHttpClient();  
 String proxyHost = "proxycn2.huawei.com";  
 int proxyPort = 8080;  
 String userName = "china\\******";  
 String password = "*******“  
 httpClient.getCredentialsProvider().setCredentials(  
   new AuthScope(proxyHost, proxyPort),  
   new UsernamePasswordCredentials(userName, password));  
 HttpHost proxy = new HttpHost(proxyHost,proxyPort);  
 httpClient.getParams().setParameter(ConnRouteParams.DEFAULT_PROXY, proxy);  
 return httpClient;  
}  

public static void main(String args[])
{
StringBuffer sb = new StringBuffer();
//创建HttpClient实例
HttpClient client = getHttpClient();
//创建httpGet
HttpGet httpGet = new HttpGet("http://www.csdn.net");
//执行
try {
HttpResponse response = client.execute(httpGet);

HttpEntity entry = response.getEntity();

if(entry != null)
{
InputStreamReader is = new InputStreamReader(entry.getContent());
BufferedReader br = new BufferedReader(is);
String str = null;
while((str = br.readLine()) != null)
{
sb.append(str.trim());
}
br.close();
}

} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println(sb.toString());
}
//设置代理
public static HttpClient getHttpClient() {
DefaultHttpClient httpClient = new DefaultHttpClient();
String proxyHost = "proxycn2.huawei.com";
int proxyPort = 8080;
String userName = "china\\******";
String password = "*******“
httpClient.getCredentialsProvider().setCredentials(
new AuthScope(proxyHost, proxyPort),
new UsernamePasswordCredentials(userName, password));
HttpHost proxy = new HttpHost(proxyHost,proxyPort);
httpClient.getParams().setParameter(ConnRouteParams.DEFAULT_PROXY, proxy);
return httpClient;
}