Android中客户端请求服务器端的两种方式:Post方式和Get方式
在这里不直接赘述了,直接上源码如下:
(1).Post的方式:
/** * Post的请求方式 * * @param model * 请求序号 * @param paramList * 客户端请求的数据参数列表 * @return */ public JSONObject doPost(int model, List<NameValuePair> paramList) { try { // 客户端向服务器发送请求的数据 List<BasicNameValuePair> params = new ArrayList<BasicNameValuePair>(); params.add(new BasicNameValuePair("param1", "中国")); params.add(new BasicNameValuePair("param2", "美国")); // 1.定义请求的方式对象: HttpPost post = new HttpPost(Base_URL); // 2.定义请求的客户端对象 HttpClient client = new DefaultHttpClient(); // 将请求的数据封装在实体类中 HttpEntity entity = new UrlEncodedFormEntity(paramList, HTTP.UTF_8); // 将实体类放置在URL中 post.setEntity(entity); // 3.执行请求,返回响应的对象 HttpResponse response = client.execute(post); if (response != null && response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) { // 获得从服务器中返回的结果:从服务器中返回的结果是字符串的形式 String result = EntityUtils.toString(response.getEntity(), HTTP.UTF_8); if (result.startsWith("{")) { try { return new JSONObject(result); } catch (JSONException e) { e.printStackTrace(); } } } } catch (ClientProtocolException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return null; }
(2).Get方式:
/** * * @param model * 请求序号 * @param paramList * 客户端请求的数据参数列表 * @return */ public JSONObject doGet(int model, List<NameValuePair> paramList) { // 客户端向服务器发送请求的数据 // List<BasicNameValuePair> params = new // ArrayList<BasicNameValuePair>(); // params.add(new BasicNameValuePair("param1", "中国")); // params.add(new BasicNameValuePair("param2", "美国")); // 对参数编码 String param = URLEncodedUtils.format(paramList, HTTP.UTF_8); // 将URL与参数拼接 // HttpGet get = new HttpGet(Base_URL + "?" + param); HttpGet get = new HttpGet(Base_URL + "?" + param); HttpClient httpClient = new DefaultHttpClient(); try { // 发起GET请求 HttpResponse response = httpClient.execute(get); if (response != null && response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) { // 从服务器中获得响应的数据 String result = EntityUtils.toString(response.getEntity(), HTTP.UTF_8); try { return new JSONObject(result); } catch (JSONException e) { e.printStackTrace(); } } } catch (ClientProtocolException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return null; }
整个工具类代码如下:
package com.chengdong.su.downloaddemo.service;import java.io.IOException;import java.util.ArrayList;import java.util.List;import org.apache.http.HttpEntity;import org.apache.http.HttpResponse;import org.apache.http.HttpStatus;import org.apache.http.NameValuePair;import org.apache.http.client.ClientProtocolException;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.client.utils.URLEncodedUtils;import org.apache.http.impl.client.DefaultHttpClient;import org.apache.http.message.BasicNameValuePair;import org.apache.http.protocol.HTTP;import org.apache.http.util.EntityUtils;import org.json.JSONException;import org.json.JSONObject;/** * 客户端向服务器端请求的工具 * * @author scd * */public class HttpUtil { /** 请求的URL */ private String Base_URL = "http://www.baidu.com"; /** TAG */ private String TAG = getClass().getSimpleName(); /** * Post的请求方式 * * @param model * 请求序号 * @param paramList * 客户端请求的数据参数列表 * @return */ public JSONObject doPost(int model, List<NameValuePair> paramList) { try { // 客户端向服务器发送请求的数据 List<BasicNameValuePair> params = new ArrayList<BasicNameValuePair>(); params.add(new BasicNameValuePair("param1", "中国")); params.add(new BasicNameValuePair("param2", "美国")); // 1.定义请求的方式对象: HttpPost post = new HttpPost(Base_URL); // 2.定义请求的客户端对象 HttpClient client = new DefaultHttpClient(); // 将请求的数据封装在实体类中 HttpEntity entity = new UrlEncodedFormEntity(paramList, HTTP.UTF_8); // 将实体类放置在URL中 post.setEntity(entity); // 3.执行请求,返回响应的对象 HttpResponse response = client.execute(post); if (response != null && response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) { // 获得从服务器中返回的结果:从服务器中返回的结果是字符串的形式 String result = EntityUtils.toString(response.getEntity(), HTTP.UTF_8); if (result.startsWith("{")) { try { return new JSONObject(result); } catch (JSONException e) { e.printStackTrace(); } } } } catch (ClientProtocolException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return null; } /** * * @param model * 请求序号 * @param paramList * 客户端请求的数据参数列表 * @return */ public JSONObject doGet(int model, List<NameValuePair> paramList) { // 客户端向服务器发送请求的数据 // List<BasicNameValuePair> params = new // ArrayList<BasicNameValuePair>(); // params.add(new BasicNameValuePair("param1", "中国")); // params.add(new BasicNameValuePair("param2", "美国")); // 对参数编码 String param = URLEncodedUtils.format(paramList, HTTP.UTF_8); // 将URL与参数拼接 // HttpGet get = new HttpGet(Base_URL + "?" + param); HttpGet get = new HttpGet(Base_URL + "?" + param); HttpClient httpClient = new DefaultHttpClient(); try { // 发起GET请求 HttpResponse response = httpClient.execute(get); if (response != null && response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) { // 从服务器中获得响应的数据 String result = EntityUtils.toString(response.getEntity(), HTTP.UTF_8); try { return new JSONObject(result); } catch (JSONException e) { e.printStackTrace(); } } } catch (ClientProtocolException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return null; }}
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