JAVA 人人网登陆实例代码(基于Apache httpclient 4.2.X)

import java.io.IOException; import java.io.UnsupportedEncodingException; import java.util.ArrayList; import java.util.List; import java.io.InputStream; import java.io.InputStreamReader; import java.io.BufferedReader; import org.apache.http.HttpResponse; import org.apache.http.HttpEntity; import org.apache.http.NameValuePair; import org.apache.http.client.ClientProtocolException; 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.impl.client.DefaultHttpClient; import org.apache.http.message.BasicNameValuePair; import org.apache.http.impl.client.LaxRedirectStrategy; import org.apache.http.util.EntityUtils; // jsoup class import org.jsoup.Jsoup; import org.jsoup.nodes.Document; import org.jsoup.nodes.Element; import org.jsoup.select.Elements; import org.apache.log4j.Logger; /* Author: Leo Li Email: krislee@163.com Last updated: 2014-12-09 */ public class renren { private static HttpResponse response; private static DefaultHttpClient httpClient; private static final Logger logger = Logger.getLogger(renren.class); public static HttpResponse do_init(String userName, String password) { httpClient = new DefaultHttpClient(); httpClient.setRedirectStrategy(new LaxRedirectStrategy()); String loginForm = "http://www.renren.com/PLogin.do"; String origURL = "http://www.renren.com/Home.do"; String domain = "renren.com"; HttpPost httpPost = new HttpPost(loginForm); List<NameValuePair> params = new ArrayList<NameValuePair>(); params.add(new BasicNameValuePair("email", userName)); params.add(new BasicNameValuePair("password", password)); params.add(new BasicNameValuePair("origURL", origURL)); params.add(new BasicNameValuePair("domain", domain)); try { httpPost.setEntity(new UrlEncodedFormEntity(params, "UTF-8")); response = postMethod(httpPost); } catch (UnsupportedEncodingException ex) { ex.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } finally { return response; } } public static HttpResponse postMethod(HttpPost post) { HttpResponse resp = null; try { resp = httpClient.execute(post); } catch (ClientProtocolException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } finally { // post.abort(); } return resp; } public HttpResponse getMethod(String url) { HttpGet get = new HttpGet(url); HttpResponse resp = null; try { resp = httpClient.execute(get); } catch (ClientProtocolException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } finally { get.abort(); } return resp; } public static String showResult(HttpResponse response) throws IOException, UnsupportedEncodingException { int status = response.getStatusLine().getStatusCode(); String line = ""; String ret = ""; logger.info("Http response status:" + status); HttpEntity entity = response.getEntity(); InputStream instream = null; if (entity != null) { instream = entity.getContent(); BufferedReader reader = new BufferedReader(new InputStreamReader( instream)); while ((line = reader.readLine()) != null) { line = new String(line.getBytes(), "UTF-8"); ret += line; } } instream.close(); EntityUtils.consume(entity); return ret; } public static boolean do_parse(String input) { boolean b_suc = false; String linkHref = null; String linkText = null; try { Document doc = Jsoup.parse(input, "UTF-8"); Elements links = doc.getElementsByAttribute("href"); for (Element link : links) { linkHref = link.attr("href"); linkText = link.text(); if (linkHref.equals("http://guide.renren.com/welcome")) { logger.debug("Welcome text (UTF-8 encoding):" + linkText); b_suc = true; break; } } } catch (Exception ex) { ex.printStackTrace(); } return b_suc; } public static void main(String[] args) { if (args.length != 2) { logger.error("Usage: renren <user> <password>"); System.exit(-1); } String user = args[0]; String passwd = args[1]; String ret = ""; try { response = do_init(user, passwd); if (response != null) { ret = showResult(response); System.out.println("Response Text:" + ret); // 解析页面，检查是否有关键字串出现 boolean bOK = do_parse(ret); if (bOK) { logger.info("You logged in successfully!"); } else { logger.info("Login failed!"); } } else { logger.error("Error occurs when logging on web site!"); } } catch (IOException e) { e.printStackTrace(); } finally { if (httpClient != null) httpClient.getConnectionManager().shutdown(); } } }