Android中通过GET和POST方式以及使用HttpClient框架通过网络通信提交参数给web应用案例

package com.xushouwei.service; import java.io.OutputStream; import java.io.UnsupportedEncodingException; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.URL; import java.net.URLEncoder; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import org.apache.http.HttpResponse; import org.apache.http.NameValuePair; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.client.methods.HttpPost; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.impl.conn.DefaultClientConnection; import org.apache.http.message.BasicNameValuePair; public class NewsService { /** * 保存数据 * * @param title标题 * @param length时长 * @return */ public static boolean save(String title, String length) { // TODO Auto-generated method stub String path = "http://192.168.0.20:8080/videonews/manageServlet"; Map<String, String> params = new HashMap<String, String>(); params.put("title", title); params.put("timelength", length); try { // return sendGetRequest(path,params); //return sendPostRequest(path, params); return sendHttpClientRequest(path, params,"utf-8"); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } return false; } //通过android中自带的httpclient开源项目实现 private static boolean sendHttpClientRequest(String path, Map<String, String> params,String encoding) throws Exception { // TODO Auto-generated method stub //使用NameValuePair存放参数 List<NameValuePair> pairs=new ArrayList<NameValuePair>();//存放请求参数 if (params != null && !params.isEmpty()) { // 迭代map中的元素 for (Map.Entry<String, String> entry : params.entrySet()) { pairs.add(new BasicNameValuePair(entry.getKey(),entry.getValue())); } } UrlEncodedFormEntity entity=new UrlEncodedFormEntity(pairs,encoding); HttpPost httpPost=new HttpPost(path); httpPost.setEntity(entity); DefaultHttpClient client=new DefaultHttpClient(); HttpResponse response=client.execute(httpPost); if(response.getStatusLine().getStatusCode()==200) { return true; } return false; } // 通过get方式 private static boolean sendGetRequest(String path, Map<String, String> params) throws Exception { // TODO Auto-generated method stub StringBuilder url = new StringBuilder(path); url.append("?"); // 迭代map中的元素 for (Map.Entry<String, String> entry : params.entrySet()) { url.append(entry.getKey()).append("="); url.append(URLEncoder.encode(entry.getValue(), "utf-8")); url.append("&"); } url.deleteCharAt(url.length() - 1); /* * URL httpurl=new URL(url.toString()); HttpURLConnection * conn=(HttpURLConnection) httpurl.openConnection(); */ HttpURLConnection conn = (HttpURLConnection) new URL(url.toString()).openConnection(); conn.setConnectTimeout(5000); conn.setRequestMethod("GET"); if (conn.getResponseCode() == 200) { return true; } return false; } // 通过post方式 private static boolean sendPostRequest(String path, Map<String, String> params) throws Exception { // TODO Auto-generated method stub StringBuilder data = new StringBuilder(); //url.append("?"); if (params != null && !params.isEmpty()) { // 迭代map中的元素 for (Map.Entry<String, String> entry : params.entrySet()) { data.append(entry.getKey()).append("="); data.append(URLEncoder.encode(entry.getValue(), "utf-8")); data.append("&"); } data.deleteCharAt(data.length() - 1); } byte[] entity=data.toString().getBytes();//得到实体数据 /* * URL httpurl=new URL(url.toString()); HttpURLConnection * conn=(HttpURLConnection) httpurl.openConnection(); */ HttpURLConnection conn = (HttpURLConnection) new URL(path).openConnection(); conn.setConnectTimeout(5000); conn.setRequestMethod("POST"); conn.setDoOutput(true);//允许对外输出数据 conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); conn.setRequestProperty("Content-Lenth", String.valueOf(entity.length)); OutputStream outStream=conn.getOutputStream(); outStream.write(entity); if(conn.getResponseCode()==200) { return true; } return false; } }