httpclient学习笔记（1）

首先我是自己学习的，使用httpclient的jar的版本为4.3.1。

json的版本为json-lib-2.4-jdk15

以上为开发需要的版本

首先呢，我通过网站https://kyfw.12306.cn/otn/login/init

看了半天。。。。嗯，他是https的。为了不每次验证，我首先下载安全证书

然后将证书交给SSLConnectionSocketFactory管理，代码如下：

public static SSLConnectionSocketFactory initssl(){
  FileInputStream instream = null;
  KeyStore trustStore = null;
  SSLContext sslcontext = null;
  SSLConnectionSocketFactory sslsf = null;
  try {
   trustStore  = KeyStore.getInstance(KeyStore.getDefaultType());
   instream = new FileInputStream(new File("steven/steven.keystore"));
   trustStore.load(instream, "1234567".toCharArray());
   sslcontext = SSLContexts.custom().loadTrustMaterial(trustStore).build();
   sslsf = new SSLConnectionSocketFactory(sslcontext,SSLConnectionSocketFactory.BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);
  } catch (KeyStoreException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (FileNotFoundException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (NoSuchAlgorithmException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (CertificateException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (KeyManagementException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }finally{
   try {
    instream.close();
   } catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   }
  }
  return sslsf;
 }

然后呢，我来创建一个httpclient的实力，因为本人懒，所以没写称多线程的。

package com.zz.httpClient;

import java.io.Serializable;

import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.impl.client.BasicCookieStore;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;

public class MyhttpClient implements Serializable{
 /**
  *
  */
 private static final long serialVersionUID = -7005306187784613564L;
 private static CloseableHttpClient httpclient = null;
 private BasicCookieStore cookieStore =null;
 
 public MyhttpClient(){
  
 }

 public BasicCookieStore getCookieStore() {
  
  return cookieStore;
 }

 public void setCookieStore(BasicCookieStore cookieStore) {
  this.cookieStore = cookieStore;
 }

 public CloseableHttpClient getHttpclient(SSLConnectionSocketFactory sslsf) {
  if(httpclient == null){
   cookieStore = new BasicCookieStore();
   httpclient = HttpClients.custom().setDefaultCookieStore(cookieStore).setSSLSocketFactory(sslsf).build();
  }
  return httpclient;
 }

 public void setHttpclient(CloseableHttpClient httpclient) {
  this.httpclient = httpclient;
 }
}

然后呢。我找到了验证码的获取的url：https://kyfw.12306.cn/otn/passcodeNew/getPassCodeNew?module=login&rand=sjrand

public static void creatImage() throws ClientProtocolException, IOException{
  System.out.println("GetRegist creatImage start");
  MyHttpGet myHttpGet = new MyHttpGet();
  String url = "https://kyfw.12306.cn/otn/passcodeNew/getPassCodeNew?module=login&rand=sjrand";
  HttpEntity entity = myHttpGet.get(url);
  File file = new File("image/regist.jpg");
  OutputStream outStream = new FileOutputStream(file);
  if (entity != null) {
    entity.writeTo(outStream);
  }
  outStream.close();
  EntityUtils.consume(entity);
  System.out.println("GetRegist creatImage end");
 }

好了，我们将验证码下载下来以后，我就可以研究研究登录的事情了。

我写了个通用的post的方法

public static HttpEntity post(String url , List keys,List value) throws ClientProtocolException, IOException{
  System.out.println("MyHttpPost logIn is star");
  MyhttpClient client = new MyhttpClient();
  CloseableHttpClient myhttpclient = client.getHttpclient(sslAndCookie.initssl());
  RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(20000).setConnectTimeout(20000).build();
  CloseableHttpResponse response = null;
  HttpPost httpost = new HttpPost(url);
  httpost.setConfig(requestConfig);
  if(keys.size() != 0){
   List <NameValuePair> nvps = new ArrayList <NameValuePair>();
   for(int i = 0 ; i < keys.size() ; i++){
    nvps.add(new BasicNameValuePair(keys.get(i).toString(),value.get(i).toString() ));
   }
   httpost.setEntity(new UrlEncodedFormEntity(nvps, Consts.UTF_8));
  }
        response = myhttpclient.execute(httpost);
  HttpEntity entity = response.getEntity();
  //EntityUtils.consume(entity);
  //response.close();
  //httpost.releaseConnection();
  System.out.println("MyHttpPost logIn is end");
  return entity;
 }

以及一个通用的get方法

 

public  HttpEntity get(String url) throws ClientProtocolException, IOException{
  System.out.println("MyHttpGet get start");
  MyhttpClient client = new MyhttpClient();
  CloseableHttpResponse response = null;
  CloseableHttpClient myhttpclient = client.getHttpclient(sslAndCookie.initssl());
  HttpGet httpget = new HttpGet(url);
  RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(20000).setConnectTimeout(20000).build();
  httpget.setConfig(requestConfig);
  response = myhttpclient.execute(httpget);
  HttpEntity entity = response.getEntity();
  //EntityUtils.consume(entity);
  //response.close();
  //httpget.releaseConnection();
  System.out.println("GetRegist get end");
  return entity;
 }

这2个方法一定要注意，一定要设置过期的时间，要不你就等吧，等到海枯石烂也是你。

通过post方法看到了登录成功，嗯，很不错了，下面获得车次。

通过url：https://kyfw.12306.cn/otn/resources/js/framework/station_name.js

我们可以获得到所有的车次，很舒服。使用json解析下就可以了，json如何解析我就不说了，很简单

通过：https://kyfw.12306.cn/otn/leftTicket/query?leftTicketDTO.train_date=2014-01-30&leftTicketDTO.from_station=BJP&leftTicketDTO.to_station=CET&purpose_codes=0X00这个url我们可以看到。2014年1月30日，应该是北京到上海的所有车次。

其中有一部分是能买的。所以。

public String getTicket(String from_station,String to_station,String train_date,String purpose_codes) throws ClientProtocolException, IOException{
  MyHttpGet myHttpGet = new MyHttpGet();
  String jsonData = "";
  String url = "https://kyfw.12306.cn/otn/leftTicket/query?leftTicketDTO.train_date=2014-01-30&leftTicketDTO.from_station=BJP&leftTicketDTO.to_station=CET&purpose_codes=0X00";
  HttpEntity entity = myHttpGet.get(url);
  if(entity != null){
   InputStream is = entity.getContent();
   BufferedReader br = new BufferedReader(new InputStreamReader(is, "UTF-8"));
   String line = "";
   while ((line = br.readLine()) != null) {
    jsonData += line;
   }
  }else{
   jsonData = "没有";
  }
  return jsonData;
 }

我们获得所有的能买的车票，嗯。我就做到这一步，他们那个转换我没看明白，我也就写到这，其实我们要的只是安全的回家。

http://download.csdn.net/detail/zilang625/6843243

这个呢，是我的源码下载地址，配合我的说明我相信大部分的人都能看明白。