JAVA中的HTTPS接口怎么利用HttpClient进行调用

import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import org.apache.http.conn.ClientConnectionManager;
import org.apache.http.conn.scheme.Scheme;
import org.apache.http.conn.scheme.SchemeRegistry;
import org.apache.http.conn.ssl.SSLSocketFactory;
import org.apache.http.impl.client.DefaultHttpClient;

/**
 * 用于进行Https请求的HttpClient 
 * @ClassName: SSLClient 
 * @Description: TODO
 * @author Devin <xxx> 
 * @date 2017年2月7日 下午1:42:07 
 * 
 */
public class SSLClient extends DefaultHttpClient {
  public SSLClient() throws Exception{
    super();
    SSLContext ctx = SSLContext.getInstance("TLS");
    X509TrustManager tm = new X509TrustManager() {
        @Override
        public void checkClientTrusted(X509Certificate[] chain,
            String authType) throws CertificateException {
        }
        @Override
        public void checkServerTrusted(X509Certificate[] chain,
            String authType) throws CertificateException {
        }
        @Override
        public X509Certificate[] getAcceptedIssuers() {
          return null;
        }
    };
    ctx.init(null, new TrustManager[]{tm}, null);
    SSLSocketFactory ssf = new SSLSocketFactory(ctx,SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
    ClientConnectionManager ccm = this.getConnectionManager();
    SchemeRegistry sr = ccm.getSchemeRegistry();
    sr.register(new Scheme("https", 443, ssf));
  }
}

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.StatusLine;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.message.BasicHeader;
import org.apache.http.util.EntityUtils;
/**
 * 利用HttpClient进行post请求的工具类
 * @ClassName: HttpClientUtil 
 * @Description: TODO
 * @author Devin <xxx> 
 * @date 2017年2月7日 下午1:43:38 
 * 
 */
public class HttpClientUtil {
  @SuppressWarnings("resource")
  public static String doPost(String url,String jsonstr,String charset){
    HttpClient httpClient = null;
    HttpPost httpPost = null;
    String result = null;
    try{
      httpClient = new SSLClient();
      httpPost = new HttpPost(url);
      httpPost.addHeader("Content-Type", "application/json");
      StringEntity se = new StringEntity(jsonstr);
      se.setContentType("text/json");
      se.setContentEncoding(new BasicHeader("Content-Type", "application/json"));
      httpPost.setEntity(se);
      HttpResponse response = httpClient.execute(httpPost);
      if(response != null){
        HttpEntity resEntity = response.getEntity();
        if(resEntity != null){
          result = EntityUtils.toString(resEntity,charset);
        }
      }
    }catch(Exception ex){
      ex.printStackTrace();
    }
    return result;
  }
}

public static void main(String[] args){ 
    String url = "https://192.168.1.101/xxx";
    String jsonStr = "{xxx}";
    String httpOrgCreateTestRtn = HttpClientUtil.doPost(url, jsonStr, "utf-8");
  }