httpclient4.X 设置代理请求（包含账号密码）

来源：互联网发布：三国乱世挂机软件编辑：程序博客网时间：2024/06/02 19:41

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();  
        }  
    }  
}  

您好，您知道这么设置以后，如何设置代理服务器的用户名和密码么

好久没搞这个了,手边也没有这个环境,但是我帮你查了一下,请试试

HttpHost proxy = new HttpHost("proxy", 8080);BasicScheme proxyAuth = new BasicScheme();// Make client believe the challenge came form a proxyproxyAuth.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：

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;}

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