Android利用HttpURLConnection实现模拟登录 _urlconnection

满堂花醉三千客，一剑霜寒十四洲。这篇文章主要讲述Android利用HttpURLConnection实现模拟登录相关的知识，希望能为你提供帮助。
最近在做一个APP，需要模拟登录教务处，之前曾经用HttpClient做过，点这里，但是发现最新的android SDK已经不支持Httpclient了，所以只好在琢磨一下HttpURLConnection实现了，其中一个问题浪费了不少时间，下面这行代码一旦添加就无法登录：

httpURLConnection.setRequestProperty("Content-Type","text/html; charset=GBK");

贴一下效果，由于是实现模拟登录，就没有解析，主要是能用Cookie访问到。

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【Android利用HttpURLConnection实现模拟登录】此外，有一个重要发现，用电脑和手机对应的Cookie都能登录，说明服务器可以对应多个Cookie！
真是一路磕磕绊绊！
贴下主要代码：
1.结构

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2.MainActivity

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package io.github.zhaoyu1995.uprtest; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.widget.TextView; import android.widget.Toast; public class MainActivity extends AppCompatActivity { private TextView kebiao; private MyTasks task; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); kebiao = (TextView) findViewById(R.id.kebiao); task = new MyTasks("201445004", "******", new OnFinishTask() { @Override public void onFinish(String data) { kebiao.setText(data); } }); task.execute(); }}

View Code3.MyTask

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package io.github.zhaoyu1995.uprtest; import android.os.AsyncTask; import java.io.BufferedReader; import java.io.DataOutputStream; import java.io.IOException; import java.io.InputStreamReader; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.URL; import java.util.ArrayList; import java.util.Iterator; import java.util.List; import java.util.Map; public class MyTasks extends AsyncTask< Void, Void, String> { private OnFinishTask onFinishTask; private String user; private String pass; private String result; private List< String> finalCookie = new ArrayList< String> (); private String jiaowuchu = "http://zhjw.dlut.edu.cn/loginAction.do"; public MyTasks (String user, String pass, OnFinishTask onFinishTask) { this.user = user; this.pass = pass; this.onFinishTask = onFinishTask; }@Override protected String doInBackground(Void... voids) { URL url; HttpURLConnection httpURLConnection; try { url = new URL(jiaowuchu); httpURLConnection = (HttpURLConnection) url.openConnection(); httpURLConnection.setDoOutput(true); //是否向链接输出 httpURLConnection.setDoInput(true); httpURLConnection.setRequestMethod("POST"); httpURLConnection.setUseCaches(false); httpURLConnection.setInstanceFollowRedirects(true); //不知道为什么加了这一行就不行了 httpURLConnection.setRequestProperty("Content-Type","text/html; charset=GBK"); httpURLConnection.setConnectTimeout(10*1000); //连接超时单位毫秒 httpURLConnection.setReadTimeout(10*1000); //读取超时单位毫秒// 连接，从postUrl.openConnection()至此的配置必须要在connect之前完成， // 要注意的是connection.getOutputStream会隐含的进行connect。 httpURLConnection.connect(); DataOutputStream out = new DataOutputStream(httpURLConnection .getOutputStream()); StringBuffer params = new StringBuffer(); params.append("zjh").append("=").append(user).append("& ") .append("mm").append("=").append(pass); httpURLConnection.getOutputStream().write(params.toString().getBytes("gb2312")); out.flush(); out.close(); BufferedReader reader = new BufferedReader(new InputStreamReader( httpURLConnection.getInputStream(), "gb2312")); String line; while ((line = reader.readLine()) != null) { result = result + line; } reader.close(); result=""; Map< String, List< String> > header = httpURLConnection.getHeaderFields(); List< String> cookies = header.get("Set-Cookie"); Iterator< String> it = cookies.iterator(); StringBuffer sbu = new StringBuffer(); //sbu.append("eos_style_cookie=default; "); while(it.hasNext()){ sbu.append(it.next()); }result = cookies.size()+""; for (int i = 0; i < cookies.size(); i++) { finalCookie.add(cookies.get(i)); }result = result+finalCookie.get(0); result = result+"--------------"+finalCookie.get(1); httpURLConnection.disconnect(); } catch (MalformedURLException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); }//get课表try { url = new URL("http://zhjw.dlut.edu.cn/xkAction.do?actionType=6"); httpURLConnection = (HttpURLConnection) url.openConnection(); //必要的设置 httpURLConnection.setConnectTimeout(10*1000); //连接超时单位毫秒 httpURLConnection.setReadTimeout(10*1000); //读取超时单位毫秒 httpURLConnection.setRequestProperty("Cookie", finalCookie.get(0)+", "+finalCookie.get(1)); System.out.println(finalCookie.get(0)+", "+finalCookie.get(1)); //httpURLConnection.setRequestProperty("Cookie", "JSESSIONID=nprNP171vDeCHb_5hawDv; path=/, NSC_kjbpxv-iuuq=2385a3d4705debd5f29101f47dcbd3b0e664f181853b4741569229a0561453d027e6fa67; path=/"); httpURLConnection.connect(); BufferedReader reader = new BufferedReader(new InputStreamReader(httpURLConnection.getInputStream(), "gb2312")); String lines; //result = ""; while ((lines = reader.readLine()) != null) { result = result + lines; } reader.close(); // 断开连接 result = result + httpURLConnection.getResponseCode(); httpURLConnection.disconnect(); } catch (MalformedURLException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); }return result; }@Override protected void onPostExecute(String s) { super.onPostExecute(s); onFinishTask.onFinish(s); } }

View Code4.OnFinishTask

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