【背景】
之前已经写了教程，分析模拟登陆百度的逻辑：
【教程】手把手教你如何利用工具(IE9的F12)去分析模拟登陆网站(百度首页)的内部逻辑过程
然后又去用不同的语言：
Python的：
【教程】模拟登陆网站 之 Python版（内含两种版本的完整的可运行的代码）
C#的：
【教程】模拟登陆网站 之 C#版（内含两种版本的完整的可运行的代码）
去实现对应逻辑。
此处，继续尝试，用Java代码，实现这套，模拟登陆百度，的逻辑。
【折腾过程】
1.之前已经整理了一些Java代码：
http://code.google.com/p/crifanlib/source/browse/trunk/java/crifanLib.java
现在是：
继续去丰富此套库。
然后把模拟登陆百度的逻辑模拟出来。
2.期间，想要实现Java的函数的默认参数，结果却发现不支持：
3.然后就是一点点去写代码，去调试了。
4.期间，出错了：
【基本解决】java中没法new：Cannot instantiate the type HttpParams
5.再去搞懂参数配置：
【整理】关于Java中的httpClient中可以传入的参数
6.再继续写代码，期间遇到各种问题，基本都解决了：
【已解决】Java代码中new List时出错：Cannot instantiate the type List<NameValuePair>
【已解决】Java中实现{String, boolean}类型的字典Dict变量
【已解决】Eclipse中用java代码去new Date结果出错：The constructor Date(String) is deprecated
【已解决】Java中的new Date所得的年份异常：传入2043年结果却是3943年
7.最终，完成了，主体代码为：
/** * [File] * EmulateLoginBaidu.java * * [Function] * Use Java code to emulate login baidu * * 【教程】模拟登陆百度之Java代码版 * http://www.crifan.com/emulate_login_baidu_use_java_code * * [Version] * v1.0, 2013-09-17 * * [Note] * 1. need add apache http lib: * 【已解决】Eclipse的java代码出错：The import org.apache cannot be resolved * http://www.crifan.com/java_eclipse_the_import_org_apache_cannot_be_resolved/ * 2.need crifanLib.java * http://code.google.com/p/crifanlib/source/browse/trunk/java/crifanLib.java * * [History] * [v1.0] * 1. initial version, finally successfully emulate login baidu using java code. */ package com.login4baidu; //import java.io.IOException; import java.util.ArrayList; //import java.util.Calendar; //import java.util.Date; //import java.util.GregorianCalendar; import java.util.HashMap; //import java.util.Hashtable; import java.util.List; //import java.util.Map; import java.util.Scanner; import java.util.regex.Matcher; import java.util.regex.Pattern; import org.apache.http.HttpResponse; import org.apache.http.NameValuePair; import org.apache.http.cookie.Cookie; //import org.apache.http.impl.cookie.BasicClientCookie; //import org.apache.http.impl.cookie.BasicClientCookie2; import org.apache.http.message.BasicNameValuePair; //import crifanLib; /** * @author CLi * */ public class EmulateLoginBaidu { static crifanLib crl; /** * @param args */ public static void main(String[] args) { crl = new crifanLib(); // TODO Auto-generated method stub EmulateLoginBaiduUsingJava(); } // emulate login baidu using java code public static void EmulateLoginBaiduUsingJava() { System.out.println("============ 程序说明 ============"); System.out.println("功能：本程序是用来演示使用Java代码去实现模拟登陆百度"); System.out.println("注意事项：部分百度账户，在登陆时会出现："); System.out.println("1.部分百度账户，在登陆时会出现："); System.out.println("系统检测到您的帐号疑似被盗，存在安全风险。请尽快修改密码。"); System.out.println("此时，本程序，无法成功模拟登陆，请自行按照提示去修改密码后，就可以了。"); boolean bLoginBaiduOk = false; List<Cookie> curCookieList; //step1: login baidu, got cookie BAIDUID System.out.println("====== 步骤1：获得BAIDUID的Cookie ======"); String strTokenValue = ""; boolean bGotCookieBaiduid = false; String strBaiduUrl = "http://www.baidu.com/"; HttpResponse baiduResp = crl.getUrlResponse(strBaiduUrl); curCookieList =crl.getCurCookieStore().getCookies(); crl.dbgPrintCookies(curCookieList, strBaiduUrl); for(Cookie ck : curCookieList) { String cookieName = ck.getName(); if(cookieName.equals("BAIDUID")) { bGotCookieBaiduid = true; } } if (bGotCookieBaiduid) { System.out.println("正确：已找到cookie BAIDUID"); } else { System.out.println("错误：没有找到cookie BAIDUID ！"); } //step2: login, pass paras, extract resp cookie System.out.println("====== 步骤2：提取login_token ======"); boolean bExtractTokenValueOK = false; if(bGotCookieBaiduid) { //https://passport.baidu.com/v2/api/?getapi&class=login&tpl=mn&tangram=true String getapiUrl = "https://passport.baidu.com/v2/api/?getapi&class=login&tpl=mn&tangram=true"; String getApiRespHtml = crl.getUrlRespHtml(getapiUrl); curCookieList =crl.getCurCookieStore().getCookies(); crl.dbgPrintCookies(curCookieList, getapiUrl); //bdPass.api.params.login_token='3cf421493884e0fe9080593d05f4744f'; Pattern tokenValP = Pattern.compile("bdPass\.api\.params\.login_token='(?<tokenVal>\w+)';"); Matcher tokenValMatcher = tokenValP.matcher(getApiRespHtml); //boolean foundTokenValue = tokenValMatcher.matches(); // will not match, but can search to find it boolean foundTokenValue = tokenValMatcher.find(); if(foundTokenValue) { strTokenValue = tokenValMatcher.group("tokenVal"); //3cf421493884e0fe9080593d05f4744f System.out.println("正确：找到 bdPass.api.params.login_token=" + strTokenValue); bExtractTokenValueOK = true; } else { System.out.println("错误：没找到bdPass.api.params.login_token !"); } } //step3: verify returned cookies if (bGotCookieBaiduid && bExtractTokenValueOK) { System.out.println("======步骤3：登陆百度并检验返回的Cookie ======"); /* //Note: //here, has verify, not manually update some cookie's domain and expiry //also can emulate baidu successfully //do some workaround to makesure here cookie H_PS_PSSID not expire //[version: 0][name: H_PS_PSSID][value: 3359_3341_2776_1424_2981][domain: .baidu.com][path: /][expiry: null] //Thu Sep 17 14:22:08 CST 2043 //Date newExpiryDate = new Date(2043, 9, 17); Date newExpiryDate = new Date(143, 9, 17); //Calendar newExpiryCalendar = new GregorianCalendar(2043, 9, 17, 14, 22, 8); BasicClientCookie hPsPssidCookie = null; BasicClientCookie dbsvrtmCookie = null; //int hPsPssidCookieIdx = 0; curCookieList = crl.getCurCookieList(); for(Cookie ck : curCookieList) { if(ck.getName().equalsIgnoreCase("H_PS_PSSID")) { //hPsPssidCookieIdx = curCookieList.indexOf(ck); hPsPssidCookie = (BasicClientCookie) ck; hPsPssidCookie.setExpiryDate(newExpiryDate); ck = hPsPssidCookie; //break; } if(ck.getName().equalsIgnoreCase("BDSVRTM")) { dbsvrtmCookie = (BasicClientCookie) ck; dbsvrtmCookie.setDomain(".baidu.com"); dbsvrtmCookie.setExpiryDate(newExpiryDate); ck = dbsvrtmCookie; //break; } } crl.setCurCookieList(curCookieList); */ String staticPageUrl = "http://www.baidu.com/cache/user/html/jump.html"; List<NameValuePair> postDict = new ArrayList<NameValuePair>(); //ArrayList<NameValuePair> headerDict = new ArrayList<NameValuePair>(); //postDict.add(new BasicNameValuePair("ppui_logintime", "")); postDict.add(new BasicNameValuePair("charset", "utf-8")); //postDict.add(new BasicNameValuePair("codestring", "")); postDict.add(new BasicNameValuePair("token", strTokenValue)); postDict.add(new BasicNameValuePair("isPhone", "false")); postDict.add(new BasicNameValuePair("index", "0")); //postDict.add(new BasicNameValuePair("u", "")); //postDict.add(new BasicNameValuePair("safeflg", "0")); postDict.add(new BasicNameValuePair("staticpage", staticPageUrl)); postDict.add(new BasicNameValuePair("loginType", "1")); postDict.add(new BasicNameValuePair("tpl", "mn")); postDict.add(new BasicNameValuePair("callback", "parent.bdPass.api.login._postCallback")); //get input baidu username and password String strBaiduUsername = ""; String strBaiduPassword = ""; Scanner inputReader = new Scanner(System.in); System.out.println("Please Enter Your:" ); System.out.println("Baidu Username:" ); strBaiduUsername = inputReader.nextLine(); //System.out.println("You Entered Username=" + strBaiduUsername); System.out.println("Baidu Password:" ); strBaiduPassword = inputReader.nextLine(); //System.out.println("You Entered Password=" + strBaiduPassword); inputReader.close(); postDict.add(new BasicNameValuePair("username", strBaiduUsername)); postDict.add(new BasicNameValuePair("password", strBaiduPassword)); postDict.add(new BasicNameValuePair("verifycode", "")); postDict.add(new BasicNameValuePair("mem_pass", "on")); String baiduMainLoginUrl = "https://passport.baidu.com/v2/api/?login"; String loginBaiduRespHtml = crl.getUrlRespHtml(baiduMainLoginUrl, null, postDict); //Map cookieNameDict = new Map(); //Map cookieNameDict = new Hashtable(); HashMap<Object, Boolean> cookieNameDict = new HashMap<Object, Boolean>(); cookieNameDict.put("BDUSS", false); cookieNameDict.put("PTOKEN", false); cookieNameDict.put("STOKEN", false); //Set-Cookie: SAVEUSERID=deleted; expires=Mon, 17-Sep-2012 09:45:03 GMT; path=/; domain=passport.baidu.com; httponly, //cookieNameDict.put("SAVEUSERID", false); curCookieList = crl.getCurCookieList(); for(Object objCookieName : cookieNameDict.keySet().toArray()) { String strCookieName = objCookieName.toString(); for(Cookie ck: curCookieList) { if(strCookieName.equalsIgnoreCase(ck.getName())) { cookieNameDict.put(strCookieName, true); } } } boolean bAllCookiesFound = true; for (Object objFoundCurCookie : cookieNameDict.values()) { bAllCookiesFound = bAllCookiesFound && Boolean.parseBoolean(objFoundCurCookie.toString()); } bLoginBaiduOk = bAllCookiesFound; if (bLoginBaiduOk) { System.out.println("成功模拟登陆百度首页！" ); } else { System.out.println("模拟登陆百度首页 失败！"); System.out.println("所返回的HTML源码为：" + loginBaiduRespHtml); } } return; } }
/** * [File] * crifanLib.java * * [Function] * 1. implement crifan's common functions * https://code.google.com/p/crifanlib/source/browse/trunk/java/crifanLib.java * * [Version] * v2.0 * * [Contact] * http://www.crifan.com/about/me/ * * [Note] * 1. need add apache http lib: * 【已解决】Eclipse的java代码出错：The import org.apache cannot be resolved * http://www.crifan.com/java_eclipse_the_import_org_apache_cannot_be_resolved/ * * [History] * [v2.0, 2013-09-17] * 1. update getUrlResponse and getUrlRespHtml * 2. add getCurCookieList, getCurCookieStore, setCurCookieStore, setCurCookieList * * [v1.4, 2013-07-17] * 1. add calcTimeStart, calcTimeEnd * 2. add dateToString, outputStringToFile * * [v1.0] * 1. add http related func and regex related func */ package com.login4baidu; import java.io.File; //import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.FileWriter; import java.io.IOException; import java.io.InputStream; //import java.net.CookieManager; //import java.net.CookiePolicy; //import java.net.HttpCookie; import java.text.SimpleDateFormat; //import java.util.Calendar; import java.util.Date; //import java.util.GregorianCalendar; import java.util.HashMap; import java.util.List; //import java.util.Map; import java.util.regex.Matcher; import java.util.regex.Pattern; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.HttpStatus; import org.apache.http.NameValuePair; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.CookieStore; //import org.apache.http.client.HttpClient; 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.client.methods.HttpUriRequest; import org.apache.http.client.params.ClientPNames; import org.apache.http.client.protocol.ClientContext; import org.apache.http.cookie.Cookie; import org.apache.http.impl.client.BasicCookieStore; import org.apache.http.impl.client.DefaultHttpClient; //import org.apache.http.impl.cookie.BasicClientCookie; import org.apache.http.params.BasicHttpParams; import org.apache.http.params.CoreConnectionPNames; //import org.apache.http.params.HttpConnectionParams; //import org.apache.http.params.HttpProtocolParams; //import org.apache.http.params.HttpParams; //import org.apache.http.params.DefaultedHttpParams; import org.apache.http.params.CoreProtocolPNames; import org.apache.http.protocol.BasicHttpContext; import org.apache.http.protocol.HttpContext; import org.apache.http.util.EntityUtils; //for android: //import crifan.com.downloadsongtastemusic.R; //import android.os.Environment; //import android.widget.EditText; //import android.app.Activity; public class crifanLib { private CookieStore gCurCookieStore = null; //private HashMap<Object, Object> calcTimeKeyDict; private HashMap<String, Long> calcTimeKeyDict; //private Map<String, Long> calcTimeKeyDict; //IE7 private static final String constUserAgent_IE7_x64 = "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/5.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; InfoPath.3; .NET4.0C; .NET4.0E)"; //IE8 private static final String constUserAgent_IE8_x64 = "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; InfoPath.3; .NET4.0C; .NET4.0E"; //IE9 private static final String constUserAgent_IE9_x64 = "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)"; // x64 private static final String constUserAgent_IE9_x86 = "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)"; // x86 //Chrome private static final String constUserAgent_Chrome = "Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/533.4 (KHTML, like Gecko) Chrome/5.0.375.99 Safari/533.4"; //Mozilla Firefox private static final String constUserAgent_Firefox = "Mozilla/5.0 (Windows; U; Windows NT 6.1; rv:1.9.2.6) Gecko/20100625 Firefox/3.6.6"; private static String gUserAgent = ""; public crifanLib() { gUserAgent = constUserAgent_IE8_x64; gCurCookieStore = new BasicCookieStore(); calcTimeKeyDict = new HashMap<String, Long>(); } /** start calculate time */ public long calcTimeStart(String uniqueKey) { long startMilliSec = 0; startMilliSec = System.currentTimeMillis(); //1373525642597 calcTimeKeyDict.put(uniqueKey, startMilliSec); //{load_dd_file=1373525642597} return startMilliSec; } /** end calculate time */ public long calcTimeEnd(String uniqueKey) { long endMilliSec = System.currentTimeMillis(); //1373525686178 long elapsedMilliSec = 0; if(calcTimeKeyDict.containsKey(uniqueKey)) { long startMilliSec = calcTimeKeyDict.get(uniqueKey); //1373525642597 elapsedMilliSec = endMilliSec - startMilliSec; //43581 } return elapsedMilliSec; } /* format date value into string */ public String dateToString(Date date, String format) { SimpleDateFormat simpleDateFormat = new SimpleDateFormat(format); String datetimeStr =simpleDateFormat.format(date); //2013-07-08_033034 return datetimeStr; } /* output string into file */ public boolean outputStringToFile(String strToOutput, String fullFilename) { boolean ouputOk = true; File newTextFile = new File(fullFilename); FileWriter fw; try { fw = new FileWriter(newTextFile); fw.write(strToOutput); fw.close(); } catch (IOException e) { // TODO Auto-generated catch block //e.printStackTrace(); ouputOk = false; } return ouputOk; } public void dbgPrintCookies(List<Cookie> cookieList, String url) { if((null != url) && (!url.isEmpty())) { System.out.println("Cookies for " + url); } for(Cookie ck : cookieList) { System.out.println(ck); } } public void dbgPrintCookies(CookieStore cookieStore) { dbgPrintCookies(cookieStore, null); } public void dbgPrintCookies(CookieStore cookieStore, String url) { List<Cookie> cookieList = cookieStore.getCookies(); dbgPrintCookies(cookieList, url); } public void dbgPrintCookies(List<Cookie> cookieList) { dbgPrintCookies(cookieList, null); } public CookieStore getCurCookieStore() { return gCurCookieStore; } public List<Cookie> getCurCookieList() { if(null != gCurCookieStore) { return gCurCookieStore.getCookies(); } else { return null; } } public void setCurCookieStore(CookieStore newCookieStore) { gCurCookieStore = newCookieStore; } public void setCurCookieList(List<Cookie> newCookieList) { gCurCookieStore.clear(); for(Cookie eachNewCk : newCookieList) { gCurCookieStore.addCookie(eachNewCk); } } /** Get response from url */ public HttpResponse getUrlResponse( String url, List<NameValuePair> headerDict, List<NameValuePair> postDict, int timeout ) { // init HttpResponse response = null; HttpUriRequest request = null; DefaultHttpClient httpClient = new DefaultHttpClient(); //HttpParams headerParams = new HttpParams(); //HttpParams headerParams = new DefaultedHttpParams(headerParams, headerParams); //HttpParams headerParams = new BasicHttpParams(); BasicHttpParams headerParams = new BasicHttpParams(); //HttpConnectionParams. //default enable auto redirect headerParams.setParameter(CoreProtocolPNames.USER_AGENT, gUserAgent); headerParams.setParameter(ClientPNames.HANDLE_REDIRECTS, Boolean.TRUE); headerParams.setParameter(CoreConnectionPNames.SO_KEEPALIVE, Boolean.TRUE); if(postDict != null) { HttpPost postReq = new HttpPost(url); try{ HttpEntity postBodyEnt = new UrlEncodedFormEntity(postDict); postReq.setEntity(postBodyEnt); } catch(Exception e){ e.printStackTrace(); } request = postReq; } else { HttpGet getReq = new HttpGet(url); request = getReq; } if(headerParams != null) { //HttpProtocolParams.setUserAgent(headerParams, gUserAgent); //headerParams.setHeader(HttpMethodParams.USER_AGENT, gUserAgent); request.setParams(headerParams); } //request.setHeader("User-Agent", gUserAgent); try{ HttpContext localContext = new BasicHttpContext(); localContext.setAttribute(ClientContext.COOKIE_STORE, gCurCookieStore); response = httpClient.execute(request, localContext); //response HeaderGroup value: //[Via: 1.1 SC-SZ-06, Connection: Keep-Alive, Proxy-Connection: Keep-Alive, Content-Length: 11006, Expires: Tue, 17 Sep 2013 01:43:44 GMT, Date: Tue, 17 Sep 2013 01:43:44 GMT, Content-Type: text/html;charset=utf-8, Server: BWS/1.0, Cache-Control: private, BDPAGETYPE: 1, BDUSERID: 0, BDQID: 0xaaa869770d8d5dcd, Set-Cookie: BDSVRTM=2; path=/, Set-Cookie: H_PS_PSSID=3361_2777_1465_2975_3109; path=/; domain=.baidu.com, Set-Cookie: BAIDUID=C0C2EAA4B1805EF21EE097E2C6A3D448:FG=1; expires=Tue, 17-Sep-43 01:43:44 GMT; path=/; domain=.baidu.com, P3P: CP=" OTI DSP COR IVA OUR IND COM "] //gCurCookieStore (formatted ouput) value: /*{ [version: 0][name: BAIDUID][value: C0C2EAA4B1805EF21EE097E2C6A3D448:FG=1][domain: .baidu.com][path: /][expiry: Thu Sep 17 09:43:44 CST 2043]=java.lang.Object@55ba1c2b, [version: 0][name: BDSVRTM][value: 2][domain: www.baidu.com][path: /][expiry: null]=java.lang.Object@55ba1c2b, [version: 0][name: H_PS_PSSID][value: 3361_2777_1465_2975_3109][domain: .baidu.com][path: /][expiry: null]=java.lang.Object@55ba1c2b }*/ } catch (ClientProtocolException cpe) { // TODO Auto-generated catch block cpe.printStackTrace(); } catch (IOException ioe) { // TODO Auto-generated catch block ioe.printStackTrace(); } return response; } /** Get response from url */ public HttpResponse getUrlResponse(String url) { return getUrlResponse(url, null, null, 0); } /** Get response html from url, headerDict, html charset, postDict */ public String getUrlRespHtml( String url, List<NameValuePair> headerDict, List<NameValuePair> postDict, int timeout, String htmlCharset ) { // init String respHtml = ""; String defaultCharset = "UTF-8"; if((null == htmlCharset) || htmlCharset.isEmpty()) { htmlCharset = defaultCharset; } //init //HttpClient httpClient = new DefaultHttpClient(); //DefaultHttpClient httpClient = new DefaultHttpClient(); //HttpUriRequest request; //headerParams.setParameter(CoreProtocolPNames.HTTP_CONTENT_CHARSET, htmlCharset); try{ HttpResponse response = getUrlResponse(url, headerDict, postDict, timeout); if(response.getStatusLine().getStatusCode()==HttpStatus.SC_OK){ HttpEntity respEnt = response.getEntity(); respHtml = EntityUtils.toString(respEnt, htmlCharset); } } catch (ClientProtocolException cpe) { // TODO Auto-generated catch block cpe.printStackTrace(); } catch (IOException ioe) { // TODO Auto-generated catch block ioe.printStackTrace(); } return respHtml; } public String getUrlRespHtml(String url, List<NameValuePair> headerDict, List<NameValuePair> postDict) { return getUrlRespHtml(url, headerDict, postDict, 0, ""); } public String getUrlRespHtml(String url, String htmlCharset) { return getUrlRespHtml(url, null, null, 0, htmlCharset); } public String getUrlRespHtml(String url) { String defaulCharset = "UTF-8"; return getUrlRespHtml(url, defaulCharset); } public interface UpdateProgressCallback { // This is just a regular method so it can return something or // take arguments if you like. public void updateProgress(long currentSize, long totalSize); } /** * download file from file url * eg: * http://m5.songtaste.com/201212211424/2e8a8a85d93f56370d7fd96b5dc6ff23/5/5c/5cf23a97cef6fad6a464eb506c409dbd.mp3 * with header: Referer=http://songtaste.com/ * */ public Boolean downlodFile(String url, File fullFilename, List<NameValuePair> headerDict, UpdateProgressCallback updateProgressCallbak) { Boolean downloadOk = Boolean.FALSE; HttpResponse response = getUrlResponse(url, headerDict, null, 0); if(response.getStatusLine().getStatusCode()==HttpStatus.SC_OK){ HttpEntity respEnt = response.getEntity(); System.out.println("isChunked" + respEnt.isChunked()); System.out.println("Streaming" + respEnt.isStreaming()); Boolean isStream = respEnt.isStreaming(); if(isStream){ try { InputStream fileInStream = respEnt.getContent(); FileOutputStream fileOutStream = new FileOutputStream(fullFilename); long totalSize = respEnt.getContentLength(); byte[] tmpBuf = new byte[8192]; int bufLen = 0; long downloadedSize = 0; while( (bufLen = fileInStream.read(tmpBuf)) > 0 ) { fileOutStream.write(tmpBuf,0, bufLen); downloadedSize += bufLen; //System.out.println(Long.toString((downloadedSize/totalSize)*100)+"%"); //System.out.println(Long.toString((downloadedSize*100)/totalSize)+"%"); updateProgressCallbak.updateProgress(downloadedSize, totalSize); } fileOutStream.close(); downloadOk = Boolean.TRUE; } catch (IllegalStateException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } return downloadOk; } /** * none header version of downlodFile * */ public String downlodFile(String url, String fullFilename) { return downlodFile(url, fullFilename); } /** Extract single string from input whole string * Note: * 1. input pattern should include one group, like 'xxx(xxx)xxx' * 2. output is in extractedStr * */ public Boolean extractSingleStr(String pattern, String extractFrom, int flags, StringBuilder extractedStr) { Pattern strP = Pattern.compile(pattern, flags); Matcher foundStr = strP.matcher(extractFrom); Boolean found = foundStr.find(); if(found) { extractedStr.append(foundStr.group(1)); } return found; } /** * None pattern version of extractSingleStr * */ public Boolean extractSingleStr(String pattern, String extractFrom, StringBuilder extractedStr) { return extractSingleStr(pattern, extractFrom, 0, extractedStr); } }
正常，成功模拟登陆百度的输出为：
8.完整的Eclipse下面的代码下载：
EmulateLoginBaidu_java_2013-09-17_crifanLibVersion.7z
注意：
1.使用此项目，需要导入org.apache.http的库。
详见：
【已解决】Eclipse的java代码出错：The import org.apache cannot be resolved
2.部分百度账户，在登陆时会出现：
系统检测到您的帐号疑似被盗，存在安全风险。请尽快修改密码。
此时，本程序，无法成功模拟登陆，请自行按照提示去修改密码后，就可以了。
【总结】
java在处理http方面的库，相对来说，还是很不方便使用。
只能算是基本够用吧。
（转自：http://www.crifan.com/emulate_login_baidu_use_java_code/）