java模拟post请求登录猫扑示例分享

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");
     }
 }
}