Apache HttpClient访问网络工具类

1

package com.ztravel.utils;

import java.io.IOException;

import java.util.ArrayList;

import java.util.List;

import java.util.Map;
import org.apache.http.HttpEntity;

import org.apache.http.HttpResponse;

import org.apache.http.NameValuePair;

import org.apache.http.ParseException;

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.util.EntityUtils;
public class HttpClientUtils {
public static String sendHttpclientPost(String path,

            Map<String, String> map, String encode) {

        // TODO Auto-generated method stub

        // 填充表单的内容

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

        // Key必须与action接收params的key一致

        if (map != null && !map.isEmpty()) {

            // 一个entry代表一个键值对，.getKey()获取键，getValue()获取值

            for (Map.Entry<String, String> entry : map.entrySet()) {

                pairs.add(new BasicNameValuePair(entry.getKey(), entry

                        .getValue()));

            }

        }

        try {

            // 添加form表单的内容，和网页的jsp一样

            UrlEncodedFormEntity entity = new UrlEncodedFormEntity(pairs,

                    encode);

            // 使用post提交数据

            HttpPost httpPost = new HttpPost(path);

            httpPost.setEntity(entity);

            HttpClient httpClient = new DefaultHttpClient();

            // HttpResponse获得服务器响应的所有消息

            HttpResponse response = httpClient.execute(httpPost);

            // 判断连接成功

            if (response.getStatusLine().getStatusCode() == 200) {

                // HttpEntity获得服务器响应回来的消息体(不包括HTTP HEAD)

                HttpEntity httpEntity = response.getEntity();

                // 自动分辨响应的内容的编码

                String defaultCharset = EntityUtils

                        .getContentCharSet(httpEntity);

                // EntityUtils.toString将获得的消息体转换成String

                return EntityUtils.toString(httpEntity, defaultCharset);

            }

        } catch (ParseException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        } catch (IOException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

        // 因为结果经常调用string的函数，所以没有返回null

        return "";
}
public static String sendHttpclientGet(HttpClient httpClient, String path) {
try {// 利用HTTPGET 向服务器发起请求

                // 如果URL连接过程中302重定向，则会自动跳转到新的页面

            HttpGet get = new HttpGet(path);
// HttpResponse获得服务器响应的所有消息

            HttpResponse response = httpClient.execute(get);
// HttpEntity获得服务器响应回来的消息体(不包括HTTP HEAD)

            HttpEntity httpEntity = response.getEntity();
if (httpEntity != null) {// 获取消息体的内容

                String defaultCharset = EntityUtils

                        .getContentCharSet(httpEntity);

                // EntityUtils.toString将获得的消息体转换成String

                return EntityUtils.toString(httpEntity, defaultCharset);

            }
} catch (Exception e) {

        }

        return "";// 返回"",但不是空值

    }
/**

     * 从网络获取图片字节数组

     * @param path

     * @return

     */

    public static byte[] getByteArrayByUrl(String path) {

        byte[] data = null;

        try {// 利用HTTPGET 向服务器发起请求

                // 如果URL连接过程中302重定向，则会自动跳转到新的页面

            HttpGet get = new HttpGet(path);
HttpClient httpClient=new DefaultHttpClient();;

            // HttpResponse获得服务器响应的所有消息

            HttpResponse response = httpClient.execute(get);
// HttpEntity获得服务器响应回来的消息体(不包括HTTP HEAD)

            HttpEntity httpEntity = response.getEntity();
if (httpEntity != null) {// 获取消息体的内容

                data = EntityUtils.toByteArray(httpEntity);

            }
} catch (Exception e) {

        }

        return data;// 返回"",但不是空值

    }

}

Done

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