httpclient:实现有验证码的模拟登陆

//1、这种方式是先把验证码的图片下载到本地、并且根据网页解析获得token值
//2、手动在控制台输入验证码
//3、因为验证码图片已经下载下来，后面就可以使用图像文字识别
package DoubanSimulate;import java.io.BufferedReader;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;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.client.ClientProtocolException;import org.apache.http.client.HttpClient;import org.apache.http.client.ResponseHandler;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.BasicResponseHandler;import org.apache.http.impl.client.DefaultHttpClient;import org.apache.http.message.BasicNameValuePair;import org.apache.http.util.EntityUtils;import org.jsoup.Jsoup;import org.jsoup.nodes.Document;public class DoubanSimulate { ???private static HttpClient httpClient = new DefaultHttpClient(); ???// 登陆入口 ???public static void loginDouban() { ???????String login_src = "https://accounts.douban.com/login"; ???????// 输入用户名及密码 ???????String form_email = "2692613726@qq.com"; ???????String form_password = "0315209X"; ???????String captcha_solution = ""; ???????// 获取验证码 ???????String captcha_id = getImgID(); ???????String login = "登录"; ???????// 输入验证码 ???????System.out.println("请输入验证码："); ???????BufferedReader buff = new BufferedReader(new InputStreamReader( ???????????????System.in)); ???????try { ???????????captcha_solution = buff.readLine(); ???????} catch (IOException e) { ???????????e.printStackTrace(); ???????} ???????// 构造参数，即模拟需要输入的参数 ???????List<NameValuePair> list = new ArrayList<NameValuePair>(); ???????list.add(new BasicNameValuePair("form_email", form_email)); ???????list.add(new BasicNameValuePair("form_password", form_password)); ???????list.add(new BasicNameValuePair("captcha-solution", captcha_solution)); ???????list.add(new BasicNameValuePair("captcha-id", captcha_id)); ???????list.add(new BasicNameValuePair("login", login)); ???????HttpPost httpPost = new HttpPost(login_src); ???????try { ???????????// 向后台请求数据,登陆网站 ???????????httpPost.setEntity(new UrlEncodedFormEntity(list)); ???????????HttpResponse response = httpClient.execute(httpPost); ???????????HttpEntity entity = response.getEntity(); ???????????String result = EntityUtils.toString(entity, "utf-8"); ???????} catch (Exception e) { ???????????// TODO: handle exception ???????} ???} ???// 获取验证码图片“token” ???private static String getImgID() { ???????String src = "https://www.douban.com/accounts/login"; ???????HttpGet httpGet = new HttpGet(src); ???????String url = ""; ???????String token=""; ???????try { ???????????HttpResponse response = httpClient.execute(httpGet); ???????????HttpEntity entity = response.getEntity(); ???????????String content = EntityUtils.toString(entity, "utf-8"); ???????????Document doc = Jsoup.parse(content); ???????????url = doc.select("div[class=item item-captcha]").select("div") ???????????????????.select("img[id=captcha_image]").attr("src"); ???????????int start = url.indexOf("="); ???????????int end = url.indexOf("&"); ???????????token = url.substring(start+1, end); ???????????// 下载验证码并存储到本地 ???????????downImg(url); ???????} catch (IOException e) { ???????????// TODO Auto-generated catch block ???????????e.printStackTrace(); ???????} ???????//https://www.douban.com/misc/captcha?id=f7enPStQocewglTaSeFdgfTu:en&size=s ???????return token; ???} ???private static void downImg(String src) throws IOException { ???????File fileDir = new File("D:\\IdentifyingCode"); ???????if (!fileDir.exists()) { ???????????fileDir.mkdirs(); ???????} ???????// 图片下载保存地址 ???????File file = new File("D:\\IdentifyingCode\\yzm.png"); ???????if (file.exists()) { ???????????file.delete(); ???????} ???????InputStream input = null; ???????FileOutputStream out = null; ???????HttpGet httpGet = new HttpGet(src); ???????try { ???????????HttpResponse response = httpClient.execute(httpGet); ???????????HttpEntity entity = response.getEntity(); ???????????input = entity.getContent(); ???????????int i = -1; ???????????byte[] byt = new byte[1024]; ???????????out = new FileOutputStream(file); ???????????while ((i = input.read(byt)) != -1) { ???????????????out.write(byt); ???????????} ???????????System.out.println("图片下载成功！"); ???????} catch (ClientProtocolException e) { ???????????e.printStackTrace(); ???????} catch (IOException e) { ???????????e.printStackTrace(); ???????} ???????out.close(); ???} ?????????//登陆后，便可以输入一个或者多个url，进行请求 ???public static String gethtml(String redirectLocation) { ?????????HttpGet httpget = new HttpGet(redirectLocation); ?????????// Create a response handler ?????????ResponseHandler<String> responseHandler = new BasicResponseHandler(); ?????????String responseBody = ""; ?????????try { ?????????????responseBody = httpClient.execute(httpget, responseHandler); ?????????} catch (Exception e) { ?????????????e.printStackTrace(); ?????????????responseBody = null; ?????????} finally { ?????????????httpget.abort(); ?// ???????????httpClient.getConnectionManager().shutdown(); ?????????} ?????????return responseBody; ?????} ?????//一个实例，只请求了一个url ???public static void main(String[] args) throws ClientProtocolException, IOException { ???????loginDouban(); ???????String redir="https://www.douban.com/people/conanemily/contacts";// ?????System.out.println(gethtml(redir)); ???????String cc=gethtml(redir); ???????System.out.println(cc); ???} ???}