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;

 

    publicvoidsetParamKey(String paramKey) {

        this.paramKey = paramKey;

    }

 

    publicvoidsetParamValue(String paramValue) {

        this.paramValue = paramValue;

    }

 

    publicString getResponseString() {

        returnresponseString;

    }

 

    publicHttpClientObject() {

        this.getHttpClient();

    }

 

    privateList<NameValuePair> getRequestBody() {

        NameValuePair pair1 =newBasicNameValuePair(paramKey, paramValue);

        List<NameValuePair> pairList =newArrayList<NameValuePair>();

        pairList.add(pair1);

        returnpairList;

    }

 

    publicvoidsubmit() {

        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();

        }

    }

 

    privatevoidresponse() {

        try{          

            HttpEntity httpEntity = response.getEntity();

            responseString = EntityUtils.toString(httpEntity);

        }catch(ClientProtocolException e) {          

            e.printStackTrace();

        }catch(IOException e) {          

            e.printStackTrace();

        }

 

    }

 

    publicvoidsetPost(String httpUrl) {

        try{

            HttpEntity requestHttpEntity =newUrlEncodedFormEntity(

                    this.getRequestBody());

            httpPost =newHttpPost(httpUrl);

            httpPost.setEntity(requestHttpEntity);

        }catch(UnsupportedEncodingException e) {

            e.printStackTrace();

        }catch(ParseException e) {

            e.printStackTrace();

        }

    }

 

    publicvoidsetGet(String httpUrl) {

        httpGet =newHttpGet(httpUrl);    

    }

 

    privatevoidgetHttpClient() {

        BasicCookieStore cookieStore =newBasicCookieStore();

        CookieSpecProvider easySpecProvider =newCookieSpecProvider() {

            publicCookieSpec create(HttpContext context) {

 

                returnnewBrowserCompatSpec() {

                    @Override

                    publicvoidvalidate(Cookie cookie, CookieOrigin origin)

                            throwsMalformedCookieException {

                        // Oh, I am easy

                    }

                };

            }

 

        };

        Registry<CookieSpecProvider> r = RegistryBuilder

                .<CookieSpecProvider> create()

                .register(CookieSpecs.BEST_MATCH,newBestMatchSpecFactory())

                .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 =newHttpClientObject();

hco.setGet(url);

hco.submit();

String responseContent = hco.getResponseString();