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import org.apache.http.Consts;

import org.apache.http.NameValuePair;

import org.apache.http.client.config.CookieSpecs;

import org.apache.http.client.config.RequestConfig;

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

import org.apache.http.client.methods.CloseableHttpResponse;

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

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

import org.apache.http.impl.client.CloseableHttpClient;

import org.apache.http.impl.client.HttpClients;

import org.apache.http.message.BasicNameValuePair;

import org.apache.http.util.EntityUtils;

import java.io.IOException;

import java.util.LinkedList;

import java.util.List;

public class Main {

public static void main(String[] args) {

RequestConfig requestConfig = RequestConfig.custom().setCookieSpec(CookieSpecs.STANDARD_STRICT).build();

CloseableHttpClient httpClient = HttpClients.custom().setDefaultRequestConfig(requestConfig).build();

HttpGet get = new HttpGet("http://www.zhihu.com/");

try {

CloseableHttpResponse response = httpClient.execute(get);

String responseHtml = EntityUtils.toString(response.getEntity());

String xsrfValue = responseHtml.split("<input type=\"hidden\" name=\"_xsrf\" value=\"")[1].split("\"/>")[0];

System.out.println("xsrfValue:" + xsrfValue);

response.close();

List<NameValuePair> valuePairs = new LinkedList<NameValuePair>();

valuePairs.add(new BasicNameValuePair("_xsrf" , xsrfValue));

valuePairs.add(new BasicNameValuePair("email", 用户名));

valuePairs.add(new BasicNameValuePair("password", 密码));

valuePairs.add(new BasicNameValuePair("rememberme", "y"));

UrlEncodedFormEntity entity = new UrlEncodedFormEntity(valuePairs, Consts.UTF_8);

HttpPost post = new HttpPost("http://www.zhihu.com/login");

post.setEntity(entity);

httpClient.execute(post);//登录

HttpGet g = new HttpGet("http://www.zhihu.com/question/following");//获取“我关注的问题”页面

CloseableHttpResponse r = httpClient.execute(g);

System.out.println(EntityUtils.toString(r.getEntity()));

r.close();

} catch (IOException e) {

e.printStackTrace();

} finally {

try {

httpClient.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}

}