Android之使用HTTP的get,post,HttpClient三种方式向服务器端提交文本数据

客户端代码示例:

/** * HTTP请求 * @author kesenhoo * */ public class HttpRequest { public static boolean sendXML(String path, String xml)throws Exception { byte[] data = xml.getBytes(); URL url = new URL(path); HttpURLConnection conn = (HttpURLConnection)url.openConnection(); conn.setRequestMethod("POST"); conn.setConnectTimeout(5 * 1000); //如果通过post提交数据，必须设置允许对外输出数据 conn.setDoOutput(true); conn.setRequestProperty("Content-Type", "text/xml; charset=UTF-8"); conn.setRequestProperty("Content-Length", String.valueOf(data.length)); OutputStream outStream = conn.getOutputStream(); outStream.write(data); outStream.flush(); outStream.close(); if(conn.getResponseCode()==200) { return true; } return false; } /** * 通过get方式提交参数给服务器 * @param path * @param params * @param enc * @return * @throws Exception */ public static boolean sendGetRequest(String path, Map<String, String> params, String enc) throws Exception { //构造如下形式的字符串，这里的字符串依情况不同 // ?method=save&title=435435435&timelength=89& //使用StringBuilder对象 StringBuilder sb = new StringBuilder(path); sb.append('?'); //迭代Map for(Map.Entry<String, String> entry : params.entrySet()) { sb.append(entry.getKey()).append('=') .append(URLEncoder.encode(entry.getValue(), enc)).append('&'); } sb.deleteCharAt(sb.length()-1); //打开链接 URL url = new URL(sb.toString()); HttpURLConnection conn = (HttpURLConnection)url.openConnection(); conn.setRequestMethod("GET"); conn.setConnectTimeout(5 * 1000); //如果请求响应码是200，则表示成功 if(conn.getResponseCode()==200) { return true; } return false; } /** * 通过Post方式提交参数给服务器 * @param path * @param params * @param enc * @return * @throws Exception */ public static boolean sendPostRequest(String path, Map<String, String> params, String enc) throws Exception { //需要构造的字符串形式如下： // title=dsfdsf&timelength=23&method=save StringBuilder sb = new StringBuilder(); //如果参数不为空 if(params!=null && !params.isEmpty()) { for(Map.Entry<String, String> entry : params.entrySet()) { //Post方式提交参数的话，不能省略内容类型与长度 sb.append(entry.getKey()).append('=') .append(URLEncoder.encode(entry.getValue(), enc)).append('&'); } sb.deleteCharAt(sb.length()-1); } //得到实体的二进制数据 byte[] entitydata = sb.toString().getBytes(); URL url = new URL(path); HttpURLConnection conn = (HttpURLConnection)url.openConnection(); conn.setRequestMethod("POST"); conn.setConnectTimeout(5 * 1000); //如果通过post提交数据，必须设置允许对外输出数据 conn.setDoOutput(true); //这里只设置内容类型与内容长度的头字段 //内容类型Content-Type: application/x-www-form-urlencoded //内容长度Content-Length: 38 conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); conn.setRequestProperty("Content-Length", String.valueOf(entitydata.length)); OutputStream outStream = conn.getOutputStream(); //把实体数据写入是输出流 outStream.write(entitydata); //内存中的数据刷入 outStream.flush(); outStream.close(); //如果请求响应码是200，则表示成功 if(conn.getResponseCode()==200) { return true; } return false; } /** * 在遇上HTTPS安全模式或者操作cookie的时候使用HTTPclient会方便很多 * 使用HTTPClient（开源项目）向服务器提交参数 * @param path * @param params * @param enc * @return * @throws Exception */ public static boolean sendRequestFromHttpClient(String path, Map<String, String> params, String enc) throws Exception { //需要把参数放到NameValuePair List<NameValuePair> paramPairs = new ArrayList<NameValuePair>(); if(params!=null && !params.isEmpty()) { for(Map.Entry<String, String> entry : params.entrySet()) { paramPairs.add(new BasicNameValuePair(entry.getKey(), entry.getValue())); } } //对请求参数进行编码，得到实体数据 UrlEncodedFormEntity entitydata = new UrlEncodedFormEntity(paramPairs, enc); //构造一个请求路径 HttpPost post = new HttpPost(path); //设置请求实体 post.setEntity(entitydata); //浏览器对象 DefaultHttpClient client = new DefaultHttpClient(); //执行post请求 HttpResponse response = client.execute(post); //从状态行中获取状态码，判断响应码是否符合要求 if(response.getStatusLine().getStatusCode()==200) { return true; } return false; } }