HttpClient4模拟登录回贴

经过HttpClient3 的N次处理,发现HttpClient3对Cookie的管理不是太好,总是传值出现问题,可以用HttpClient4一比较,发现他对Cookie的管理实在是太好了,不需要你去处理,下面是关于HttpClient4模拟登录回贴的代码,希望对用到这方面的朋友提供参考

package com.httpclient4; 

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
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;
import org.apache.http.protocol.BasicHttpContext;
import org.apache.http.protocol.HttpContext;
import org.apache.http.util.EntityUtils;

public class MainLogin {
	public static void main(String[] args) throws ClientProtocolException,
			IOException {
		HttpClient httpClient = new DefaultHttpClient();

		List<NameValuePair> formparams = new ArrayList<NameValuePair>();
		formparams.add(new BasicNameValuePair("u_name", "jbeduhai"));
		formparams.add(new BasicNameValuePair("u_passwd", "xxx"));
		UrlEncodedFormEntity entity = new UrlEncodedFormEntity(formparams,
				"UTF-8");

		HttpPost httppost = new HttpPost("http://passport.xxx.com.cn/login.jsp");
		httppost.setEntity(entity);
		HttpContext localContext = new BasicHttpContext();

		HttpResponse response2 = httpClient.execute(httppost, localContext);
		int statusCode = response2.getStatusLine().getStatusCode();
		System.out.println("statusCode:" + statusCode);
		System.out.println(EntityUtils.toString(response2.getEntity(),"UTF-8"));
		EntityUtils.consume(response2.getEntity());
		
		
		if (statusCode == HttpStatus.SC_MOVED_PERMANENTLY
				|| statusCode == HttpStatus.SC_MOVED_TEMPORARILY
				|| statusCode == HttpStatus.SC_SEE_OTHER
				|| statusCode == HttpStatus.SC_TEMPORARY_REDIRECT) {
			String newUrl = response2.getLastHeader("Location").getValue();
			System.out.println("从新定向的页面为：" + newUrl);

			HttpGet get = new HttpGet(newUrl);
			HttpEntity entity2 = httpClient.execute(get, localContext)
					.getEntity();
			String homePage = EntityUtils.toString(entity2,"UTF-8");
			System.out.println(homePage);
			
			EntityUtils.consume(entity2);
			
			//取formhash值
			String formhash =null;
			if(homePage.indexOf("formhash=") != -1){
				int pos = homePage.indexOf("formhash=");
				formhash = homePage.substring(pos+9, pos+17);
				System.out.println("------formhash="+formhash);
			}
			
			List<NameValuePair> postFormparams = new ArrayList<NameValuePair>();
			postFormparams.add(new BasicNameValuePair("message", "很强的贴子啊，顶一个..."));
			postFormparams.add(new BasicNameValuePair("subject", ""));
			postFormparams.add(new BasicNameValuePair("formhash", formhash));
			UrlEncodedFormEntity postEntity = new UrlEncodedFormEntity(postFormparams,
					"UTF-8");
			
			String pUrl="http://www.xxx.cn/forum.php?mod=post&action=reply&fid=1270&tid=14365186&extra=page%3D1&replysubmit=yes&infloat=yes&handlekey=fastpost";
			HttpPost post3 = new HttpPost(pUrl);
			post3.setEntity(postEntity);
			HttpContext localContext3 = new BasicHttpContext();
			HttpResponse response3 = httpClient.execute(post3, localContext3);
			int statusCode3 = response3.getStatusLine().getStatusCode();
			System.out.println("statusCode3:" + statusCode3);
			System.out.println(EntityUtils.toString(response3.getEntity(),"UTF-8"));
			EntityUtils.consume(response3.getEntity());
		}
	}
	
}