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] view plaincopyprint?

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：

[java] view plaincopyprint?

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httpGetHttpGet 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 blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.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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httpclient4.X 设置代理请求（包含账号密码）

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