java实现爬取知乎用户基本信息

作者：卧颜沉默
链接：https://www.zhihu.com/question/36909173/answer/97643000
来源：知乎
著作权归作者所有。商业转载请联系作者获得授权，非商业转载请注明出处。
 
 /**
  *
  * @param httpClient Http客户端
  * @param context Http上下文
  * @return
  */
public boolean login(CloseableHttpClient httpClient, HttpClientContext context){
String yzm = null;
String loginState = null;
HttpGet getRequest = new HttpGet("https://www.zhihu.com/#signin");
HttpClientUtil.getWebPage(httpClient,context, getRequest, "utf-8", false);
HttpPost request = new HttpPost("https://www.zhihu.com/login/email");
List<NameValuePair> formParams = new ArrayList<NameValuePair>();
yzm = yzm(httpClient, context,"https://www.zhihu.com/captcha.gif?type=login");//肉眼识别验证码
formParams.add(new BasicNameValuePair("captcha", yzm));
formParams.add(new BasicNameValuePair("_xsrf", ""));//这个参数可以不用
formParams.add(new BasicNameValuePair("email", "邮箱"));
formParams.add(new BasicNameValuePair("password", "密码"));
formParams.add(new BasicNameValuePair("remember_me", "true"));
UrlEncodedFormEntity entity = null;
try {
entity = new UrlEncodedFormEntity(formParams, "utf-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
request.setEntity(entity);
loginState = HttpClientUtil.getWebPage(httpClient,context, request, "utf-8", false);//登录
JSONObject jo = new JSONObject(loginState);
if(jo.get("r").toString().equals("0")){
System.out.println("登录成功");
getRequest = new HttpGet("https://www.zhihu.com");
HttpClientUtil.getWebPage(httpClient,context ,getRequest, "utf-8", false);//访问首页
HttpClientUtil.serializeObject(context.getCookieStore(),"resources/zhihucookies");//序列化知乎Cookies，下次登录直接通过该cookies登录
return true;
}else{
System.out.println("登录失败" + loginState);
return false;
}
}
/**
  * 肉眼识别验证码
  * @param httpClient Http客户端
  * @param context Http上下文
  * @param url 验证码地址
  * @return
  */
public String yzm(CloseableHttpClient httpClient,HttpClientContext context, String url){
HttpClientUtil.downloadFile(httpClient, context, url, "d:/test/", "1.gif",true);
Scanner sc = new Scanner(System.in);
String yzm = sc.nextLine();
return yzm;
}