Android应用经常会和交互，这就需要手机客户端发送网络请求，下面介绍四种常用网络请求方式，我这边是通过Android来完成这四种方法的，还不清楚Android的的同学们请看Android开发技巧总结中的Android的步骤一文。 java.net包中的HttpURLConnection类 Get方式： [java] view plaincopyprint? // Get方式请求 public static void requestByGet() throws Exception { String path = ""; // 新建一个URL对象 URL url = new URL(path); // 打开一个HttpURLConnection连接 HttpURLConnection urlConn = (HttpURLConnection) url.openConnection(); // 设置连接超时时间 urlConn.setConnectTimeout(5 * 1000); // 开始连接 urlConn.connect(); // 判断请求是否成功 if (urlConn.getResponseCode() == HTTP_200) { // 获取返回的数据 byte[] data = readStream(urlConn.getInputStream()); Log.i(TAG_GET, "Get方式请求成功，返回数据如下："); Log.i(TAG_GET, new String(data, "UTF-8")); } else { Log.i(TAG_GET, "Get方式请求失败"); } // 关闭连接 urlConn.disconnect(); } // Get方式请求 public static void requestByGet() throws Exception { String path = ""; // 新建一个URL对象 URL url = new URL(path); // 打开一个HttpURLConnection连接 HttpURLConnection urlConn = (HttpURLConnection) url.openConnection(); // 设置连接超时时间 urlConn.setConnectTimeout(5 * 1000); // 开始连接 urlConn.connect(); // 判断请求是否成功 if (urlConn.getResponseCode() == HTTP_200) { // 获取返回的数据 byte[] data = readStream(urlConn.getInputStream()); Log.i(TAG_GET, "Get方式请求成功，返回数据如下："); Log.i(TAG_GET, new String(data, "UTF-8")); } else { Log.i(TAG_GET, "Get方式请求失败"); } // 关闭连接 urlConn.disconnect(); } Post方式： [java] view plaincopyprint? // Post方式请求 public static void requestByPost() throws Throwable { String path = ""; // 请求的参数转换为byte数组 String params = "id=" + URLEncoder.encode("helloworld", "UTF-8") + "&pwd=" + URLEncoder.encode("android", "UTF-8"); byte[] postData = params.getBytes(); // 新建一个URL对象 URL url = new URL(path); // 打开一个HttpURLConnection连接 HttpURLConnection urlConn = (HttpURLConnection) url.openConnection(); // 设置连接超时时间 urlConn.setConnectTimeout(5 * 1000); // Post请求必须设置允许输出 urlConn.setDoOutput(true); // Post请求不能使用缓存 urlConn.setUseCaches(false); // 设置为Post请求 urlConn.setRequestMethod("POST"); urlConn.setInstanceFollowRedirects(true); // 配置请求Content-Type urlConn.setRequestProperty("Content-Type", "application/x-www-form-urlencode"); // 开始连接 urlConn.connect(); // 发送请求参数 DataOutputStream dos = new DataOutputStream(urlConn.getOutputStream()); dos.write(postData); dos.flush(); dos.close(); // 判断请求是否成功 if (urlConn.getResponseCode() == HTTP_200) { // 获取返回的数据 byte[] data = readStream(urlConn.getInputStream()); Log.i(TAG_POST, "Post请求方式成功，返回数据如下："); Log.i(TAG_POST, new String(data, "UTF-8")); } else { Log.i(TAG_POST, "Post方式请求失败"); } } // Post方式请求 public static void requestByPost() throws Throwable { String path = ""; // 请求的参数转换为byte数组 String params = "id=" + URLEncoder.encode("helloworld", "UTF-8") + "&pwd=" + URLEncoder.encode("android", "UTF-8"); byte[] postData = params.getBytes(); // 新建一个URL对象 URL url = new URL(path); // 打开一个HttpURLConnection连接 HttpURLConnection urlConn = (HttpURLConnection) url.openConnection(); // 设置连接超时时间 urlConn.setConnectTimeout(5 * 1000); // Post请求必须设置允许输出 urlConn.setDoOutput(true); // Post请求不能使用缓存 urlConn.setUseCaches(false); // 设置为Post请求 urlConn.setRequestMethod("POST"); urlConn.setInstanceFollowRedirects(true); // 配置请求Content-Type urlConn.setRequestProperty("Content-Type", "application/x-www-form-urlencode"); // 开始连接 urlConn.connect(); // 发送请求参数 DataOutputStream dos = new DataOutputStream(urlConn.getOutputStream()); dos.write(postData); dos.flush(); dos.close(); // 判断请求是否成功 if (urlConn.getResponseCode() == HTTP_200) { // 获取返回的数据 byte[] data = readStream(urlConn.getInputStream()); Log.i(TAG_POST, "Post请求方式成功，返回数据如下："); Log.i(TAG_POST, new String(data, "UTF-8")); } else { Log.i(TAG_POST, "Post方式请求失败"); } } org.apache.http包中的HttpGet和HttpPost类 Get方式： [java] view plaincopyprint? // HttpGet方式请求 public static void requestByHttpGet() throws Exception { String path = ""; // 新建HttpGet对象 HttpGet httpGet = new HttpGet(path); // 获取HttpClient对象 HttpClient httpClient = new DefaultHttpClient(); // 获取HttpResponse实例 HttpResponse httpResp = httpClient.execute(httpGet); // 判断是够请求成功 if (httpResp.getStatusLine().getStatusCode() == HTTP_200) { // 获取返回的数据 String result = EntityUtils.toString(httpResp.getEntity(), "UTF-8"); Log.i(TAG_HTTPGET, "HttpGet方式请求成功，返回数据如下："); Log.i(TAG_HTTPGET, result); } else { Log.i(TAG_HTTPGET, "HttpGet方式请求失败"); } } // HttpGet方式请求 public static void requestByHttpGet() throws Exception { String path = ""; // 新建HttpGet对象 HttpGet httpGet = new HttpGet(path); // 获取HttpClient对象 HttpClient httpClient = new DefaultHttpClient(); // 获取HttpResponse实例 HttpResponse httpResp = httpClient.execute(httpGet); // 判断是够请求成功 if (httpResp.getStatusLine().getStatusCode() == HTTP_200) { // 获取返回的数据 String result = EntityUtils.toString(httpResp.getEntity(), "UTF-8"); Log.i(TAG_HTTPGET, "HttpGet方式请求成功，返回数据如下："); Log.i(TAG_HTTPGET, result); } else { Log.i(TAG_HTTPGET, "HttpGet方式请求失败"); } } Post方式： [java] view plaincopyprint? // HttpPost方式请求 public static void requestByHttpPost() throws Exception { String path = ""; // 新建HttpPost对象 HttpPost httpPost = new HttpPost(path); // Post参数 List params = new ArrayList (); params.add(new BasicNameValuePair("id", "helloworld")); params.add(new BasicNameValuePair("pwd", "android")); // 设置字符集 HttpEntity entity = new UrlEncodedFormEntity(params, HTTP.UTF_8); // 设置参数实体 httpPost.setEntity(entity); // 获取HttpClient对象 HttpClient httpClient = new DefaultHttpClient(); // 获取HttpResponse实例 HttpResponse httpResp = httpClient.execute(httpPost); // 判断是够请求成功 if (httpResp.getStatusLine().getStatusCode() == HTTP_200) { // 获取返回的数据 String result = EntityUtils.toString(httpResp.getEntity(), "UTF-8"); Log.i(TAG_HTTPGET, "HttpPost方式请求成功，返回数据如下："); Log.i(TAG_HTTPGET, result); } else { Log.i(TAG_HTTPGET, "HttpPost方式请求失败"); } }