HttpClient示例

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import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;
 
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.ParseException;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.config.CookieSpecs;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.config.Registry;
import org.apache.http.config.RegistryBuilder;
import org.apache.http.cookie.Cookie;
import org.apache.http.cookie.CookieOrigin;
import org.apache.http.cookie.CookieSpec;
import org.apache.http.cookie.CookieSpecProvider;
import org.apache.http.cookie.MalformedCookieException;
import org.apache.http.impl.client.BasicCookieStore;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.cookie.BestMatchSpecFactory;
import org.apache.http.impl.cookie.BrowserCompatSpec;
import org.apache.http.impl.cookie.BrowserCompatSpecFactory;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.protocol.HttpContext;
import org.apache.http.util.EntityUtils;
 
public class HttpClientObject {
 
    privateCloseableHttpClient httpClient = null;
 
    privateHttpResponse response;
 
    privateHttpPost httpPost = null;
 
    privateHttpGet httpGet = null;
 
    privateString paramKey = "";
 
    privateString paramValue = "";
 
    privateString responseString;
 
    publicvoid setParamKey(String paramKey) {
        this.paramKey = paramKey;
    }
 
    publicvoid setParamValue(String paramValue) {
        this.paramValue = paramValue;
    }
 
    publicString getResponseString() {
        returnresponseString;
    }
 
    publicHttpClientObject() {
        this.getHttpClient();
    }
 
    privateList<NameValuePair> getRequestBody() {
        NameValuePair pair1 =new BasicNameValuePair(paramKey, paramValue);
        List<NameValuePair> pairList =new ArrayList<NameValuePair>();
        pairList.add(pair1);
        returnpairList;
    }
 
    publicvoid submit() {
        try{
            if(httpPost != null) {
                response = httpClient.execute(httpPost);
                httpPost =null;
            }
            if(httpGet != null) {
                response = httpClient.execute(httpGet);
                httpGet =null;
            }
            this.response();
        }catch (ClientProtocolException e) {          
            e.printStackTrace();
        }catch (IOException e) {          
            e.printStackTrace();
        }
    }
 
    privatevoid response() {
        try{          
            HttpEntity httpEntity = response.getEntity();
            responseString = EntityUtils.toString(httpEntity);
        }catch (ClientProtocolException e) {          
            e.printStackTrace();
        }catch (IOException e) {          
            e.printStackTrace();
        }
 
    }
 
    publicvoid setPost(String httpUrl) {
        try{
            HttpEntity requestHttpEntity =new UrlEncodedFormEntity(
                    this.getRequestBody());
            httpPost =new HttpPost(httpUrl);
            httpPost.setEntity(requestHttpEntity);
        }catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }catch (ParseException e) {
            e.printStackTrace();
        }
    }
 
    publicvoid setGet(String httpUrl) {
        httpGet =new HttpGet(httpUrl);    
    }
 
    privatevoid getHttpClient() {
        BasicCookieStore cookieStore =new BasicCookieStore();
        CookieSpecProvider easySpecProvider =new CookieSpecProvider() {
            publicCookieSpec create(HttpContext context) {
 
                returnnew BrowserCompatSpec() {
                    @Override
                    publicvoid validate(Cookie cookie, CookieOrigin origin)
                            throwsMalformedCookieException {
                        // Oh, I am easy
                    }
                };
            }
 
        };
        Registry<CookieSpecProvider> r = RegistryBuilder
                .<CookieSpecProvider> create()
                .register(CookieSpecs.BEST_MATCH,new BestMatchSpecFactory())
                .register(CookieSpecs.BROWSER_COMPATIBILITY,
                        newBrowserCompatSpecFactory())
                .register("easy", easySpecProvider).build();
 
        RequestConfig requestConfig = RequestConfig.custom()
                .setCookieSpec("easy").setSocketTimeout(10000)
                .setConnectTimeout(10000).build();
 
        httpClient = HttpClients.custom().setDefaultCookieSpecRegistry(r)
                .setDefaultRequestConfig(requestConfig)
                .setDefaultCookieStore(cookieStore).build();       
    }
 
}

 调用时:

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HttpClientObject hco =new HttpClientObject();
hco.setGet(url);
hco.submit();
String responseContent = hco.getResponseString();    

 

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