import java.io.BufferedReader; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.OutputStreamWriter; import java.net.HttpURLConnection; import java.net.URL; import java.util.Scanner; import java.util.StringTokenizer; import org.jsoup.Jsoup; import org.jsoup.nodes.Document; import org.jsoup.select.Elements; public class TestPost {  public static void main(String args[]) throws IOException{    Scanner scanner = new Scanner(System.in);   System.out.println("请输入用户名：");   String user_name = scanner.next();   System.out.println("请输入密码：");   String password = scanner.next();   testPost(user_name , password,"d:/fileDown2.txt");   testJsoup();  }  public static void testPost(String user_name , String password,String outPath) throws IOException{   String login ="";    URL url = new URL("http://passport.mop.com");   HttpURLConnection connection = null;   connection = (HttpURLConnection) url.openConnection();//建立链接   connection.setInstanceFollowRedirects(false);   connection.setRequestProperty("Connection","keep-alive");   connection.setRequestProperty("User-Agent",     "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/32.0.1700.107 Safari/537.36");   connection.addRequestProperty("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");   connection.setDoInput(true);   connection.setDoOutput(true); //  connection.disconnect();   String str = connection.getHeaderField("Location");//获得重定向的url地址   URL newURL = new URL(str);  //  String cookies = getCookies(connection);   HttpURLConnection conn = (HttpURLConnection) newURL.openConnection();   conn.setRequestProperty("Referer", str);//浏览器向 WEB 服务器表明自己是从哪个 网页/URL 获得/点击 当前请求中的网址/URL //  conn.setRequestProperty("Cookie", cookies); //发送设置cookie：   conn.setRequestProperty("Connection","keep-alive");   conn.setRequestProperty("User-Agent",     "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/32.0.1700.107 Safari/537.36");   conn.setRequestProperty("Content-Type","application/x-www-form-urlencoded");   conn.setDoInput(true);   conn.setDoOutput(true);   OutputStreamWriter out = new OutputStreamWriter(conn.getOutputStream(),"utf-8");   login =login+"user_name="+user_name+"&"+"password="+password;   out.write(login);   out.flush();   out.close();   InputStream inputStream = conn.getInputStream();   BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream, "utf-8"));   reader.close();   //链接到personal页面   String headerName = null;   StringBuilder myCookies = new StringBuilder(); //  myCookies.append(cookies + ";");   for(int i =1;(headerName= conn.getHeaderFieldKey(i))!=null;i++){     if(headerName.equals("Set-Cookie")){      String cookie = conn.getHeaderField(i);      cookie = cookie.substring(0, cookie.indexOf(";"));      String cookieName = cookie.substring(0, cookie.indexOf("="));      String cookieValue = cookie.substring(cookie.indexOf("=") + 1, cookie.length());      myCookies.append(cookieName + "=");      myCookies.append(cookieValue + ";");     }   }   URL purl = new URL("http://passport.mop.com/personal");   HttpURLConnection pconn = (HttpURLConnection) purl.openConnection();   pconn.setRequestProperty("Referer", str);   pconn.setRequestProperty("Cookie", myCookies.toString());   pconn.connect();   InputStream inputStream1 = pconn.getInputStream(); //  BufferedReader reader1 = new BufferedReader(new InputStreamReader(inputStream1,"utf-8")); //  String line1 = reader1.readLine(); //  while(line1 != null){ //   System.out.println(line1); //   line1 = reader1.readLine(); //  } //  reader1.close();   int chByte = 0;   FileOutputStream fileOut = new FileOutputStream(new File(outPath));   chByte = inputStream1.read();   while(chByte != -1){    fileOut.write(chByte);    chByte = inputStream1.read();   }  }  private static String getCookies(HttpURLConnection conn) {   // TODO Auto-generated method stub //     StringBuffer cookies = new StringBuffer();        StringBuilder cookies = new StringBuilder();            String headName;              for (int i = 1; (headName = conn.getHeaderField(i)) != null; i++) {                  StringTokenizer st = new StringTokenizer(headName, "; ");                  while (st.hasMoreTokens()) {                      cookies.append(st.nextToken() + "; ");                  }              }                         return cookies.toString();        }  private static void testJsoup() throws IOException{   //解析html文档       File input = new File("D:/fileDown2.txt");       Document doc = Jsoup.parse(input, "UTF-8"); //     for(Element ele : doc.getElementsByClass("zhnc").select("ul")){ //      if(!ele.select("li").toString().equals("")){ //       String text = ele.select("li").text(); //       System.out.println("user_name is:"+text); //      } //     }       Elements ele = doc.getElementsByClass("zhnc").select("ul");      if(!ele.select("li").toString().equals("")){       String text = ele.select("li").text();       System.out.println("user_name is:"+text);      }else{       System.out.println("登录失败");      }  } }