httpClient使用，1 发送post请求 2 发送get请求取得接口中的数据

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import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import net.sf.json.JSONObject;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.protocol.HTTP;

import com.alibaba.fastjson.JSON;

/**
* @Title:TestHttpClient
* @Author Tony
* @Date: 2014年6月21日下午3:29:37
* @Description: httpClient使用，1 发送post请求 2 发送get请求
*
*/
public class TestHttpClient {

   /**
   * @Title: methodPost
   * @Description: httpclient方法中post提交数据的使用
   * @param @return
   * @param @throws Exception
   * @return String
   * @throws
   */
   public static String methodPost() throws Exception {
       DefaultHttpClient httpclient = new DefaultHttpClient();
       // // 代理的设置
       // HttpHost proxy = new HttpHost("10.60.8.20", 8080);
       // httpclient.getParams().setParameter(ConnRoutePNames.DEFAULT_PROXY,
       // proxy);

       // 目标地址
       HttpPost httppost = new HttpPost(
               "http://192.168.6.27:8010/mobileservices/cart/payment_list.htm?");
       System.out.println("请求: " + httppost.getRequestLine());

       // post 参数传递
       List<BasicNameValuePair> nvps = new ArrayList<BasicNameValuePair>();
       nvps.add(new BasicNameValuePair("pid", "7")); // 参数
       nvps.add(new BasicNameValuePair("v", "1")); // 参数
       nvps.add(new BasicNameValuePair("time", "1406968391")); // 参数
       nvps.add(new BasicNameValuePair("device_type", "android_tuan")); // 参数
       nvps.add(new BasicNameValuePair("cps_code", "jx")); // 参数
       nvps.add(new BasicNameValuePair("cps_id", "1")); // 参数
       nvps.add(new BasicNameValuePair("app_key",
               "f35486edbc52fa48981a28b49cc7dceb")); // 参数
       nvps.add(new BasicNameValuePair("user_id", "2069860")); // 参数
       nvps.add(new BasicNameValuePair("area_id", "2")); // 参数
       nvps.add(new BasicNameValuePair("is_cod", "1")); // 参数
       nvps.add(new BasicNameValuePair("sign",
               "45951e4ae7f0c1afb82ff03e3598b270")); // 参数

       httppost.setEntity(new UrlEncodedFormEntity(nvps, HTTP.UTF_8)); // 设置参数给Post

       // 执行
       HttpResponse response = httpclient.execute(httppost);
       HttpEntity entity = response.getEntity();
       System.out.println(response.getStatusLine());
       if (entity != null) {
           System.out.println("Response content length: "
                   + entity.getContentLength());
       }
       // 显示结果
       BufferedReader reader = new BufferedReader(new InputStreamReader(
               entity.getContent(), "UTF-8"));

       String line = null;
       while ((line = reader.readLine()) != null) {
           System.out.println(line);
       }
       if (entity != null) {
           entity.consumeContent();
       }
       return null;

   }

   /**
   * @Title: methodGet
   * @Description: 以get方法提交数的使用
   * @param @return
   * @param @throws Exception
   * @return String
   * @throws
   */
   public static String methodGet() throws Exception {
       DefaultHttpClient httpclient = new DefaultHttpClient();
       // // 代理的设置
       // HttpHost proxy = new HttpHost("10.60.8.20", 8080);
       // httpclient.getParams().setParameter(ConnRoutePNames.DEFAULT_PROXY,
       // proxy);

       // 目标地址
       HttpPost httpGet = new HttpPost("http://localhost:8011/testServlet");

       // 构造最简单的字符串数据
       StringEntity reqEntity = new StringEntity("name=test&password=test");
       // 设置类型
       reqEntity.setContentType("application/x-www-form-urlencoded");
       // 设置请求的数据
       httpGet.setEntity(reqEntity);

       // 执行
       HttpResponse response = httpclient.execute(httpGet);
       HttpEntity entity = response.getEntity();
       System.out.println(response.getStatusLine());

       if (entity != null) {
           System.out.println("Response content length: "
                   + entity.getContentLength()); // 得到返回数据的长度
       }
       // 显示结果
       BufferedReader reader = new BufferedReader(new InputStreamReader(
               entity.getContent(), "UTF-8"));

       String line = null;
       while ((line = reader.readLine()) != null) {
           System.out.println(line);
       }
       if (entity != null) {
           entity.consumeContent();
       }
       return null;

   }

   /**
   * 模拟url访问从特定的url中获取json
   *
   * @param urlStr
   * @param params
   * @return json object ,or null if failed 参数经过封装后传过来，提交为 post请求
   */
   private static JSONObject getJsonFromUrl(String urlStr,
           Map<String, String> params) {
       HttpClient httpClient = new DefaultHttpClient();
       HttpPost httpPost = new HttpPost(urlStr);
       JSONObject json = null;
       try {
           if (params != null) {
               Iterator<String> keys = params.keySet().iterator();
               List<NameValuePair> nvps = new ArrayList<NameValuePair>();
               while (keys.hasNext()) {
                   String key = keys.next();
                   nvps.add(new BasicNameValuePair(key, params.get(key)));
               }
               httpPost.setEntity(new UrlEncodedFormEntity(nvps, HTTP.UTF_8));
           }
           HttpResponse response = httpClient.execute(httpPost);
           HttpEntity entity = response.getEntity();
           InputStream is = entity.getContent();
           byte[] bytes = new byte[256];
           StringBuffer sb = new StringBuffer();
           while (is.read(bytes) > 0) {
               sb.append(new String(bytes));
               bytes = new byte[256];
           }
           json = JSONObject.fromObject(sb.toString());
       } catch (Exception e) {
           e.printStackTrace();
       }

       return json;
   }

   /**
   * @Title: main
   * @Description: 测试类
   * @param @param args
   * @return void
   * @throws
   */
   public static void main(String[] args) {
       Map<String, String> params = new HashMap<String, String>();
       String strUrl = "http://192.168.6.27:8010/mobileservices/cart/payment_list.htm?pid=7&v=1&time=1406968391&device_type=android_tuan&cps_code=jx&cps_id=1&app_key=f35486edbc52fa48981a28b49cc7dceb&user_id=2069860&area_id=2&is_cod=1&sign=45951e4ae7f0c1afb82ff03e3598b270";
       try {
           //post获取json数据
           TestHttpClient.methodPost();
           //从url获取json数据
           JSONObject obj = getJsonFromUrl(strUrl, params);
           System.out.println(obj);
       } catch (Exception e) {
           e.printStackTrace();
       }
   }
}

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