使用Java代码向SAP ABAP Netweaver发送HTTP post请求

package cloudsynchronizer;
import java.io.IOException;
import org.apache.commons.codec.binary.Base64;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.mime.HttpMultipartMode;
import org.apache.http.entity.mime.MultipartEntityBuilder;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
@SuppressWarnings("deprecation")
public class Synchronizer {
    final private static String POST_PREFIX = "https://ag3.corp:44356/sap/crm/bluecrystal_obd?sap-client=001&upload=";
    private static String getRequestURL(String str)
    {
      String url = POST_PREFIX + str;
          url = url + "&sid=" + Math.random();
          return url;
    }
   @SuppressWarnings("resource")
  private static void sendHTTPPostRequest(String str) 
   { 
     HttpClient httpclient = new DefaultHttpClient();
     String raw = "WANGJER:passw@rd"; 
     String encoded = Base64.encodeBase64String(raw.getBytes());
       HttpPost httppost = new HttpPost(getRequestURL(str));
       MultipartEntityBuilder builder = MultipartEntityBuilder.create();        
       builder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
       builder.addTextBody("version", "1.0.1");
       builder.addTextBody("corporate", "sap");
       try {
              httppost.addHeader("Content-Type","multipart/form-data; boundary=assdsfdffafasf");
              httppost.addHeader("User-Agent","Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)");
              httppost.addHeader("Authorization", "Basic " + encoded);  
              HttpResponse httpresponse = httpclient.execute(httppost);
              HttpEntity resEntity = httpresponse.getEntity();
              String response = EntityUtils.toString(resEntity);
              System.out.println(response);
          }
          catch (IOException e)
          {
           System.out.println(e.getLocalizedMessage());
           e.printStackTrace();
          }
   }
   public static void main(String[] args) throws ClientProtocolException, IOException  
   {  
     sendHTTPPostRequest("&cmd=003&partner_id=MC7834");
   }  
}