HttpClient Java模拟Http请求

HttpClient Get POST
[图片] 需要导入的jar包
commons-logging.jar httpcore-4.0.1.jar  httpclient-4.0.3.jar

[代码] HttpClient4使用

001 package main; 

002   

003 import java.io.IOException; 

004 import java.io.UnsupportedEncodingException; 

005 import java.net.URI; 

006 import java.net.URISyntaxException; 

007 import java.util.ArrayList; 

008 import java.util.List; 

009   

010 import org.apache.http.HttpEntity; 

011 import org.apache.http.HttpResponse; 

012 import org.apache.http.NameValuePair; 

013 import org.apache.http.ParseException; 

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

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

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

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

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

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

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

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

022   

023 public class Main { 

024   

025     private static HttpClient hc = new DefaultHttpClient(); 

026   

027     /** 

028      * @param args 

029      */

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

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

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

033         params.add(new BasicNameValuePair("pwd", "xxx")); 

034         params.add(new BasicNameValuePair("save_login", "1")); 

035   

036         String url = "http://www.oschina.net/action/user/login"; 

037   

038         String body = post(url, params); 

039         System.out.println(body); 

040     } 

041   

042     /** 

043      * Get请求 

044      * @param url 

045      * @param params 

046      * @return 

047      */

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

049         String body = null; 

050         try { 

051             // Get请求 

052             HttpGet httpget = new HttpGet(url); 

053             // 设置参数 

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

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

056             // 发送请求 

057             HttpResponse httpresponse = hc.execute(httpget); 

058             // 获取返回数据 

059             HttpEntity entity = httpresponse.getEntity(); 

060             body = EntityUtils.toString(entity); 

061             if (entity != null) { 

062                 entity.consumeContent(); 

063             } 

064         } catch (ParseException e) { 

065             e.printStackTrace(); 

066         } catch (UnsupportedEncodingException e) { 

067             e.printStackTrace(); 

068         } catch (IOException e) { 

069             e.printStackTrace(); 

070         } catch (URISyntaxException e) { 

071             e.printStackTrace(); 

072         } 

073         return body; 

074     } 

075   

076     /** 

077      * // Post请求 

078      * @param url 

079      * @param params 

080      * @return 

081      */

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

083         String body = null; 

084         try { 

085             // Post请求 

086             HttpPost httppost = new HttpPost(url); 

087             // 设置参数 

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

089             // 发送请求 

090             HttpResponse httpresponse = hc.execute(httppost); 

091             // 获取返回数据 

092             HttpEntity entity = httpresponse.getEntity(); 

093             body = EntityUtils.toString(entity); 

094             if (entity != null) { 

095                 entity.consumeContent(); 

096             } 

097         } catch (UnsupportedEncodingException e) { 

098             e.printStackTrace(); 

099         } catch (ClientProtocolException e) { 

100             e.printStackTrace(); 

101         } catch (ParseException e) { 

102             e.printStackTrace(); 

103         } catch (IOException e) { 

104             e.printStackTrace(); 

105         } 

106         return body; 

107     } 

108   

http://www.oschina.net/code/snippet_54371_1515

http://openmind.iteye.com/blog/1329720