httpclient4.3官方下载地址_httpclient4.4 jar download

httpclient jar下载地址如下

jar中lib目录是需要使用的jar包 ，内容有

commons-codec-1.6.jar

commons-logging-1.1.3.jar

fluent-hc-4.3.jar

httpclient-4.3.jar

httpclient-cache-4.3.jar

httpcore-4.3.jar

httpmime-4.3.jar

下面说明一下简单实例如下：

import java.util.ArrayList;
import java.util.List;

import org.apache.http.Consts;
import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.cookie.Cookie;
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.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

/**
 * A example that demonstrates how HttpClient APIs can be used to perform
 * form-based logon.
 */
public class ClientFormLogin {

    public static void main(String[] args) throws Exception {
        BasicCookieStore cookieStore = new BasicCookieStore();
        CloseableHttpClient httpclient = HttpClients.custom().setDefaultCookieStore(cookieStore).build();
        try {
            HttpGet httpget = new HttpGet("https://portal.sun.com/portal/dt");

            CloseableHttpResponse response1 = httpclient.execute(httpget);
            try {
                HttpEntity entity = response1.getEntity();

                System.out.println("Login form get: " + response1.getStatusLine());
                EntityUtils.consume(entity);

                System.out.println("Initial set of cookies:");
                List<Cookie> cookies = cookieStore.getCookies();
                if (cookies.isEmpty()) {
                    System.out.println("None");
                } else {
                    for (int i = 0; i < cookies.size(); i++) {
                        System.out.println("- " + cookies.get(i).toString());
                    }
                }
            } finally {
                response1.close();
            }

            HttpPost httpost = new HttpPost("https://portal.sun.com/amserver/UI/Login?" +
                    "org=self_registered_users&" +
                    "goto=/portal/dt&" +
                    "gotoOnFail=/portal/dt?error=true");
            List <NameValuePair> nvps = new ArrayList <NameValuePair>();
            nvps.add(new BasicNameValuePair("IDToken1", "username"));
            nvps.add(new BasicNameValuePair("IDToken2", "password"));

            httpost.setEntity(new UrlEncodedFormEntity(nvps, Consts.UTF_8));

            CloseableHttpResponse response2 = httpclient.execute(httpost);
            try {
                HttpEntity entity = response2.getEntity();

                System.out.println("Login form get: " + response2.getStatusLine());
                EntityUtils.consume(entity);

                System.out.println("Post logon cookies:");
                List<Cookie> cookies = cookieStore.getCookies();
                if (cookies.isEmpty()) {
                    System.out.println("None");
                } else {
                    for (int i = 0; i < cookies.size(); i++) {
                        System.out.println("- " + cookies.get(i).toString());
                    }
                }
            } finally {
                response2.close();
            }
        } finally {
            httpclient.close();
        }
    }
}