JAVA实现httpClient实例

package net.zhutou.http;

import java.util.HashMap; 
import java.util.Iterator; 
import java.util.Map;
import org.apache.commons.httpclient.Header; 
import org.apache.commons.httpclient.HttpClient; 
import org.apache.commons.httpclient.HttpStatus; 
import org.apache.commons.httpclient.NameValuePair; 
import org.apache.commons.httpclient.methods.PostMethod;
   /**
    * @author 猪头
    */
    public class MyClient {

    /**
    *的到Http请求结果
    * @param url请求地址
    * @param parms请求参数
    * @return
   */

    public byte[] getBody(String url,Map parms){

    byte[] body=null;

    //构造HttpClient的实例

    HttpClient httpClient = new HttpClient();

    //创建GET方法的实例

    PostMethod postMethod = new PostMethod(url);

    //填入各个表单域的值

    NameValuePair[] data = new NameValuePair[parms.keySet().size()]; Iterator it = parms.entrySet().iterator();

    int i=0;

    while (it.hasNext()) { Map.Entry entry = (Map.Entry) it.next(); Object key = entry.getKey(); Object value = entry.getValue(); data[i]=new NameValuePair(key.toString(),value.toString());

    i++;

    }

//将表单的值放入postMethod中

    postMethod.setRequestBody(data);

    try {

    //执行postMethod

    int statusCode = httpClient.executeMethod(postMethod); // HttpClient对于要求接受后继服务的请求，象POST和PUT等不能自动处理转发

    // 301或者302

    if (statusCode == HttpStatus.SC_MOVED_PERMANENTLY || statusCode == HttpStatus.SC_MOVED_TEMPORARILY) {

    //从头中取出转向的地址

    Header locationHeader = postMethod

    .getResponseHeader(“location”);

    String location = null;

    if (locationHeader != null) { location = locationHeader.getValue(); System.out .println(“The page was redirected to:” + location);

    } else {

    System.err.println(“Location field value is null.”);

    }

    }

    body = postMethod.getResponseBody();

    } catch (Exception e) {

    e.printStackTrace();

    }

    return body;

    }

    public static void main(String[] args) {

    String url=“http://www.huawei.com”;

    Map parms=new HashMap();

    MyClient client=new MyClient();

    String result=new String(client.getBody(url, parms)); System.out.println(result);

    }

    }