httpCore4.0 基础引

地址：http://hc.apache.org/httpcomponents-core/index.html

去这里下载httpClient 4.0.1 ，解压后找到examples文件夹，里面有很多示例，很简单。

贴一段自己写的discuz论坛发帖机的代码：

 

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import org.apache.commons.httpclient.HttpException;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
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.cookie.Cookie;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.protocol.HTTP;


/**
 * 
 * @author xugang
 *
 */
public class TestHttpClient {

	/**
	 * @param args
	 * @throws IOException
	 * @throws HttpException
	 */
	public static void main(String[] args) throws Exception {
		
	String bbsUrl = "http://jxsj.bbs.xoyo.com";
	String url = bbsUrl + "/logging.php";
	DefaultHttpClient hc = new DefaultHttpClient();
	HttpPost httpost = new HttpPost(url);
	List <NameValuePair> nvps = new ArrayList <NameValuePair>();	//post参数
        nvps.add(new BasicNameValuePair("username", "***"));
        nvps.add(new BasicNameValuePair("password", "***"));
        nvps.add(new BasicNameValuePair("formhash", "***"));
        nvps.add(new BasicNameValuePair("questionid", "0"));
        nvps.add(new BasicNameValuePair("answer", ""));
        nvps.add(new BasicNameValuePair("cookietime", "315360000"));
        nvps.add(new BasicNameValuePair("loginmode", "normal"));
        nvps.add(new BasicNameValuePair("action", "login"));
        nvps.add(new BasicNameValuePair("loginsubmit", "true"));
        
        httpost.setEntity(new UrlEncodedFormEntity(nvps, HTTP.UTF_8));	//把参数用utf-8编码
        HttpResponse response = hc.execute(httpost);
        HttpEntity entity = response.getEntity();						//获得HttpEntity
        System.out.println("Login form get: " + response.getStatusLine());
        //必须要对entity进行处理，否则用同一个httpClient访问其他地址时，会抛出异常。这里是销毁返回的content
        if (entity != null) {											
            entity.consumeContent();
        }        
        System.out.println("Initial set of cookies:");
        List<Cookie> cookies = hc.getCookieStore().getCookies();
        if (cookies.isEmpty()) {
            System.out.println("None");
        } else {
            for (int i = 0; i < cookies.size(); i++) {
                System.out.println("- " + cookies.get(i).toString());
            }
        }
        
        String geturl2 = "http://jxsj.bbs.xoyo.com/forumdisplay.php?fid=7079&page=1";
        HttpGet get = new HttpGet(geturl2);
        HttpResponse response2 = hc.execute(get);
        HttpEntity entity2 = response2.getEntity();
		//必须要对entity进行处理，否则用同一个httpClient访问其他地址时，会抛出异常。这里是读取返回的content，然后关闭流。
        InputStream is2 = entity2.getContent();
        BufferedReader br2 = new BufferedReader( new InputStreamReader(is2));
        String str2 ="";
        while( (str2 = br2.readLine())!= null ){
        	System.out.println(str2);
        }
        is2.close();
        br2.close();
        hc.getConnectionManager().shutdown();     //关闭这个httpclient

	}	
}

 

。。