简单的HttpClient使用

Httpclient用途很广泛，用来处理各种http请求，这里举个简单的例子

去查询ＱＱ邮件登陆账号检测是的verifycode,一直想怎么能够代码登陆

QQ邮箱，但是ＱＱ的登陆机制做的太ＴＭＤ牛逼了，验证码一关还没

找到办法过去。

  1 import java.io.IOException;

  2 import java.io.UnsupportedEncodingException;

  3 import java.net.URI;

  4 import java.net.URISyntaxException;

  5 import java.util.ArrayList;

  6 import java.util.List;

  7 

  8 import org.apache.http.HttpEntity;

  9 import org.apache.http.HttpResponse;

 10 import org.apache.http.NameValuePair;

 11 import org.apache.http.ParseException;

 12 import org.apache.http.client.ClientProtocolException;

 13 import org.apache.http.client.HttpClient;

 14 import org.apache.http.client.entity.UrlEncodedFormEntity;

 15 import org.apache.http.client.methods.HttpGet;

 16 import org.apache.http.client.methods.HttpPost;

 17 import org.apache.http.impl.client.DefaultHttpClient;

 18 import org.apache.http.message.BasicNameValuePair;

 19 import org.apache.http.util.EntityUtils;

 20 

 21 public class ＨttpProcess{

 22 

 23     private static HttpClient httpclient = new DefaultHttpClient();

 24     public static void main(String[] args) {

 25         

 26         List<NameValuePair> params = new ArrayList<NameValuePair>();

 27         params.add(new BasicNameValuePair("uin", "[email protected]"));

 28         params.add(new BasicNameValuePair("appid", "522005705"));

 29         params.add(new BasicNameValuePair("ptlang", "2052"));

 30         params.add(new BasicNameValuePair("js_type", "2"));

 31         params.add(new BasicNameValuePair("js_ver", "10009"));

 32         String r =  String.valueOf(Math.random());

 33         params.add(new BasicNameValuePair("r", r));

 34         String url = "https://ssl.ptlogin2.qq.com/check";

 35 

 36         String body = post(url, params);

 37         System.out.println(body);

 38     }

 39 

 40     /**

 41      * Get请求

 42      */

 43     @SuppressWarnings("deprecation")

 44     public static String get(String url, List<NameValuePair> params) {

 45         String body = null;

 46         try {

 47             // Get请求

 48             HttpGet httpget = new HttpGet(url);

 49             // 设置参数

 50             String str = EntityUtils.toString(new UrlEncodedFormEntity(params));

 51             httpget.setURI(new URI(httpget.getURI().toString() + "?" + str));

 52             // 发送请求

 53             HttpResponse httpresponse = httpclient.execute(httpget);

 54             // 获取返回数据

 55             HttpEntity entity = httpresponse.getEntity();

 56             body = EntityUtils.toString(entity);

 57             if (entity != null) {

 58                 entity.consumeContent();

 59             }

 60         } catch (ParseException e) {

 61             e.printStackTrace();

 62         } catch (UnsupportedEncodingException e) {

 63             e.printStackTrace();

 64         } catch (IOException e) {

 65             e.printStackTrace();

 66         } catch (URISyntaxException e) {

 67             e.printStackTrace();

 68         }

 69         return body;

 70     }

 71 

 72     /**

 73      *  Post请求

 74      */

 75     @SuppressWarnings("deprecation")

 76     public static String post(String url, List<NameValuePair> params) {

 77         String body = null;

 78         try {

 79             // Post请求

 80             HttpPost httppost = new HttpPost(url);

 81             // 设置参数

 82             httppost.setEntity(new UrlEncodedFormEntity(params));

 83             // 发送请求

 84             HttpResponse httpresponse = httpclient.execute(httppost);

 85             // 获取返回数据

 86             HttpEntity entity = httpresponse.getEntity();

 87             body = EntityUtils.toString(entity);

 88             if (entity != null) {

 89                 entity.consumeContent();

 90             }

 91         } catch (UnsupportedEncodingException e) {

 92             e.printStackTrace();

 93         } catch (ClientProtocolException e) {

 94             e.printStackTrace();

 95         } catch (ParseException e) {

 96             e.printStackTrace();

 97         } catch (IOException e) {

 98             e.printStackTrace();

 99         }

100         return body;

101     }

102 

103 }

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