最近在学习java中通过post方式访问后台服务器，那么今天也算个学习笔记吧！

首先，上代码：

Runnable payRunnable = new Runnable() { @Override public void run() { try { HashMap<String, String> payParamMap = new HashMap<String, String>(); payParamMap.put("canshu" ,"woshicanshu" ); String payParamStr = XmlUtils.toXml(payParamMap);//转换成xml格式 String resultStr = Utils.httpPost(UrlString, payParamStr);//调用访问函数 //<span style="font-family: Arial, Helvetica, sans-serif;">resultStr 就是访问所得到的返回值 </span> } catch(Exception e) { e.printStackTrace(); } } }; // 必须异步调用 Thread payThread = new Thread(payRunnable); payThread.start();

其次，上代码：

public class Utils { private static final String TAG = "woshiTag"; public static String httpPost(String url, String entity) { if (url == null || url.length() == 0) { Log.e(TAG, "httpPost, url is null"); return null; } HttpClient httpClient = getNewHttpClient(); HttpPost httpPost = new HttpPost(url); try { httpPost.setEntity(new StringEntity(entity, HTTP.UTF_8)); httpPost.setHeader("Accept", "application/json"); httpPost.setHeader("Content-type", "application/json"); HttpResponse resp = httpClient.execute(httpPost); if (resp.getStatusLine().getStatusCode() != HttpStatus.SC_OK) { Log.e(TAG, "httpGet fail, status code = " + resp.getStatusLine().getStatusCode()); return null; } return new String(EntityUtils.toByteArray(resp.getEntity())); } catch (Exception e) { Log.e(TAG, "httpPost exception, e = " + e.getMessage()); e.printStackTrace(); return null; } } private static HttpClient getNewHttpClient() { try { KeyStore trustStore = KeyStore.getInstance(KeyStore.getDefaultType()); trustStore.load(null, null); SSLSocketFactory sf = new SSLSocketFactoryEx(trustStore); sf.setHostnameVerifier(SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER); HttpParams params = new BasicHttpParams(); HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1); HttpProtocolParams.setContentCharset(params, HTTP.UTF_8); SchemeRegistry registry = new SchemeRegistry(); registry.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 80)); registry.register(new Scheme("https", sf, 443)); ClientConnectionManager ccm = new ThreadSafeClientConnManager(params, registry); return new DefaultHttpClient(ccm, params); } catch (Exception e) { return new DefaultHttpClient(); } } }

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。