Java HttpClient4.X 如何登陆ASP.NET网站？

Code菜鸟 2015-06-26 10:10:09

请教大神，如何用HttpClient4.X版本登录ASP. NET网站？我一直登陆不成功，总是返回登录界面？如何解决？
我用的登录方法如下：



package com.java.Test;



import java.io.BufferedReader;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.util.ArrayList;

import java.util.List;



import org.apache.http.HttpEntity;

import org.apache.http.HttpResponse;

import org.apache.http.NameValuePair;

import org.apache.http.client.HttpClient;

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

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

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

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

import org.apache.http.message.BasicNameValuePair;



@SuppressWarnings("deprecation")

public class LoginASP 

{

	HttpClient client = new DefaultHttpClient();

	

	String VIEWSTATE = "";

	String EVENTVALIDATION = "";

	

	String username = "";//登录的帐号

	String pwd = "";//登录密码

	

	public LoginASP()

	{

	}

		

	public static void main(String args[])

	{

		LoginASP login = new LoginASP();

		if(login.HttpGet())

		{

			login.Login();

		}

	}

	

	public boolean HttpGet()

	{	

		try 

		{

			HttpGet get = new HttpGet("http://passport.efeihu.com/");

			HttpResponse response = client.execute(get);

			HttpEntity entiry = response.getEntity();

			InputStream is = entiry.getContent();

			InputStreamReader isr = new InputStreamReader(is,"UTF-8");

			BufferedReader br = new BufferedReader(isr);

			String html = "";

			while((html=br.readLine())!=null)

			{

				if(html.indexOf("VIEWSTATE")!=-1)

				{

					VIEWSTATE = (html.substring(html.lastIndexOf("value=\"")+7, html.lastIndexOf("\"")));

				}

				else if(html.indexOf("EVENTVALIDATION")!=-1)

				{

					EVENTVALIDATION = (html.substring(html.lastIndexOf("value=\"")+7, html.lastIndexOf("\"")));

				}

			}

			br.close();

			isr.close();

			is.close();

		} 

		catch (Exception e) 

		{

			e.printStackTrace();

			return false;

		} 

		return true;

	}

	

	

	public void Login()

	{

		try {

			List<NameValuePair> parameters = new ArrayList<NameValuePair>();

			parameters.add(new BasicNameValuePair("__VIEWSTATE",VIEWSTATE));

			parameters.add(new BasicNameValuePair("__EVENTVALIDATION", EVENTVALIDATION));

			parameters.add(new BasicNameValuePair("ctl00$ContentPlaceHolder1$txtUserName", username));

			parameters.add(new BasicNameValuePair("ctl00$ContentPlaceHolder1$txtPassword", pwd));

			parameters.add(new BasicNameValuePair("txtUserName", username));

			parameters.add(new BasicNameValuePair("txtPassword", pwd));

			HttpPost post = new HttpPost("http://passport.efeihu.com/login.aspx");

			post.setEntity(new UrlEncodedFormEntity(parameters));

			

			HttpResponse response = client.execute(post);

			HttpEntity entiry = response.getEntity();

			InputStream is = entiry.getContent();

			InputStreamReader isr = new InputStreamReader(is,"UTF-8");

			BufferedReader br = new BufferedReader(isr);

			String html = "";

			while((html=br.readLine())!=null)

			{

				System.out.println(html);

			}

			br.close();

			isr.close();

			is.close();

		} catch (Exception e) {

			// TODO Auto-generated catch block

			e.printStackTrace();

		}

	}

}