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

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();

}

}

}