android中使用httpclient提交表单

在android开发中如果我们需要和服务器端交互的时候已经使用apache client项目进行表单的模拟提交。通过返回json对象进而来达到数据的提交与取回，同时又能保证session的有效性以及系统的安全性，这里我封装了一下httpclient的get和post方式来提交数据

/** *  */package com.jiuchongju.util;import java.util.ArrayList;import java.util.List;import java.util.Map;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.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.protocol.HTTP;import org.apache.http.util.EntityUtils;/** * Description: * @version  1.0 */public class HttpUtil{// 创建HttpClient对象public static HttpClient httpClient ;public static final String BASE_URL = "http://www.xxx.com/projectname/name_baidu!jsonstring";/** *  * @param url 发送请求的URL * @return 服务器响应字符串 * @throws Exception */public static String getRequest(String url)throws Exception{httpClient= new DefaultHttpClient();try{// 创建HttpGet对象。HttpGet get = new HttpGet(url);// 发送GET请求HttpResponse httpResponse = httpClient.execute(get);// 如果服务器成功地返回响应if (httpResponse.getStatusLine().getStatusCode() == 200){// 获取服务器响应字符串String result = EntityUtils.toString(httpResponse.getEntity());return result;}}catch(Exception e){e.printStackTrace();return "获取数据失败！";}finally{httpClient.getConnectionManager().shutdown();}return null;}/** *  * @param url 发送请求的URL * @param params 请求参数 * @return 服务器响应字符串 * @throws Exception */public static String postRequest(String url, Map<String ,String> rawParams){httpClient= new DefaultHttpClient();try{// 创建HttpPost对象。HttpPost post = new HttpPost(url);// 如果传递参数个数比较多的话可以对传递的参数进行封装List<NameValuePair> params = new ArrayList<NameValuePair>();for(String key : rawParams.keySet()){//封装请求参数params.add(new BasicNameValuePair(key , rawParams.get(key)));}// 设置请求参数post.setEntity(new UrlEncodedFormEntity(params,HTTP.UTF_8));// 发送POST请求HttpResponse httpResponse = httpClient.execute(post);// 如果服务器成功地返回响应if (httpResponse.getStatusLine().getStatusCode() == 200){// 获取服务器响应字符串String result = EntityUtils.toString(httpResponse.getEntity());return result;}}catch(Exception e){e.printStackTrace();}finally{httpClient.getConnectionManager().shutdown();}return null;}}

需要说明的是，这个一般不能直接在主线程来做这个动作，这样会因为网络问题造成主线程假死。手机客户端的UI卡掉

一般我都是异步进行数据的调用