眾所周知，httpclient可以模擬登陸操作，下面我就來個例項測試一下，順便也回憶下這個開源工具的使用，直接上例子吧！

package com.pyc.search.crawler.node.login;

import java.io.IOException;
import java.util.concurrent.TimeUnit;

import org.apache.http.Header;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

public class LoginMis {
	private CloseableHttpClient httpclient;
	private HttpPost httppost;// 用於提交登陸資料
	private HttpGet httpget;// 用於獲得登入後的頁面
	private String login_success;// 用於構造上面的HttpGet

	public LoginMis() {
		httpclient = HttpClients.createDefault();
		// mis登陸介面網址
		httppost = new HttpPost("http://mis.pyc.com.cn/login.aspx");
	}

	public void logIn(String name, String password) throws Exception {
		httppost.setHeader("Content-Type", "application/x-www-form-urlencoded");
		String post ="__VIEWSTATE=%2FwEPDwUJNjUwNzE0MTM4ZGRq%2FuXaVF47TNHr5WWnDm%2F6haaRp0gOdDNIQoZp%2FJkyIA%3D%3D&__EVENTVALIDATION=%2FwEWBQLc1Oq3DgLEhISFCwKd%2B7qdDgKC3IeGDAK7q7GGCL0B2uWAzgYaqwKD%2F9eVKMfwK6lpSiVQr9EOO89rWz0w&txtName="+name+"&txtPwd="+password+"&btnLogin=%E7%99%BB+%E5%BD%95";
		httppost.setEntity(new StringEntity(post, "utf-8"));

		try {
			// 提交登入資料
			HttpResponse re = httpclient.execute(httppost);
			
			System.out.println("response:	"+re);
			
			
			Header[] h =re.getAllHeaders();
			for (Header header : h) {
				System.out.println(header.toString());
			}
			// 獲得跳轉的網址
			Header locationHeader = re.getFirstHeader("Location");
			
			
			// 登陸不成功
			if (locationHeader == null) {
				System.out.println("使用者 ：   "+name+"登陸不成功，請確認您的使用者名稱和密碼正確...");
				System.out.println("使用者 ：   "+name+" \t密碼:"+password);
				return;
			} else// 成功
			{
				login_success = "http://mis.pyc.com.cn"+locationHeader.getValue();// 獲取登陸成功之後跳轉連結
				System.out.println("使用者: "+name+"  登陸成功,之後跳轉到的網頁網址：" + login_success);
				TimeUnit.SECONDS.sleep(3);
				System.out.println("使用者: "+name+"  cookie資訊: "+re.getLastHeader("Set-Cookie").getValue());
				TimeUnit.SECONDS.sleep(3);
			}
		} catch (ClientProtocolException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

	public void PrintText(String name) throws IOException {
		httpget = new HttpGet(login_success);
		HttpResponse re2 = null;

		try {
			re2 = httpclient.execute(httpget);
			// 輸出登入成功後的頁面
			String str = EntityUtils.toString(re2.getEntity());
			
			System.out.println("\n"+name+"首頁資訊如下:");
			System.out.println(str.substring(8250,8400));
		} catch (ClientProtocolException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} finally {
			httppost.abort();
			httpget.abort();
			httpclient.close();
		}
	}

	public static void main(String[] args) throws Exception {
		String name = "xxxxx", password = "xxxxxx";
		// 自己的賬號，口令
		LoginMis lr = new LoginMis();
		lr.logIn(name, password);
		lr.PrintText(name);
	}
}