java使用https post发送json数据

   import java.io.ByteArrayOutputStream;  import java.io.DataOutputStream;  import java.io.IOException;  import java.io.InputStream;  import java.net.URL;  import java.security.KeyManagementException;  import java.security.NoSuchAlgorithmException;  import java.security.cert.CertificateException;  import java.security.cert.X509Certificate;     import javax.net.ssl.HostnameVerifier;  import javax.net.ssl.HttpsURLConnection;  import javax.net.ssl.SSLContext;  import javax.net.ssl.SSLSession;  import javax.net.ssl.TrustManager;  import javax.net.ssl.X509TrustManager;     public class HttpsUtil {         private static class TrustAnyTrustManager implements X509TrustManager {             public void checkClientTrusted(X509Certificate[] chain, String authType)                  throws CertificateException {          }             public void checkServerTrusted(X509Certificate[] chain, String authType)                  throws CertificateException {          }             public X509Certificate[] getAcceptedIssuers() {              return new X509Certificate[] {};          }      }         private static class TrustAnyHostnameVerifier implements HostnameVerifier {          public boolean verify(String hostname, SSLSession session) {              return true;          }      }         /**       * post方式请求服务器(https协议)       *        * @param url       *            请求地址       * @param content       *            参数       * @param charset       *            编码       * @return       * @throws NoSuchAlgorithmException       * @throws KeyManagementException       * @throws IOException       */      public static byte[] post(String url, String content, String charset)              throws NoSuchAlgorithmException, KeyManagementException,              IOException {          SSLContext sc = SSLContext.getInstance("SSL");          sc.init(null, new TrustManager[] { new TrustAnyTrustManager() },                  new java.security.SecureRandom());             URL console = new URL(url);          HttpsURLConnection conn = (HttpsURLConnection) console.openConnection();          conn.setSSLSocketFactory(sc.getSocketFactory());          conn.setHostnameVerifier(new TrustAnyHostnameVerifier());          conn.setDoOutput(true);          conn.connect();          DataOutputStream out = new DataOutputStream(conn.getOutputStream());          out.write(content.getBytes(charset));          // 刷新、关闭          out.flush();          out.close();          InputStream is = conn.getInputStream();          if (is != null) {              ByteArrayOutputStream outStream = new ByteArrayOutputStream();              byte[] buffer = new byte[1024];              int len = 0;              while ((len = is.read(buffer)) != -1) {                  outStream.write(buffer, 0, len);              }              is.close();              return outStream.toByteArray();          }          return null;      }     }