public static String postFileMultiPart(String url,Map<String,ContentBody> reqParam) throws ClientProtocolException, IOException{
        CloseableHttpClient httpclient = HttpClients.createDefault();
        
        try {
            // 建立httpget.    
            HttpPost httppost = new HttpPost(url);
        	
            //setConnectTimeout：設定連線超時時間，單位毫秒。setConnectionRequestTimeout：設定從connect Manager獲取Connection 超時時間，單位毫秒。這個屬性是新加的屬性，因為目前版本是可以共享連線池的。setSocketTimeout：請求獲取資料的超時時間，單位毫秒。 如果訪問一個介面，多少時間內無法返回資料，就直接放棄此次呼叫。
            RequestConfig defaultRequestConfig = RequestConfig.custom().setConnectTimeout(5000).setConnectionRequestTimeout(5000).setSocketTimeout(15000).build();
            httppost.setConfig(defaultRequestConfig);
            
            System.out.println("executing request " + httppost.getURI());
            
            MultipartEntityBuilder multipartEntityBuilder = MultipartEntityBuilder.create();
            for(Entry<String,ContentBody> param : reqParam.entrySet()){
            	multipartEntityBuilder.addPart(param.getKey(), param.getValue());
            }
            HttpEntity reqEntity = multipartEntityBuilder.build();
            httppost.setEntity(reqEntity);
            
            // 執行post請求.    
            CloseableHttpResponse response = httpclient.execute(httppost);
            
            System.out.println("got response");
            
            try {  
                // 獲取響應實體    
                HttpEntity entity = response.getEntity();  
                //System.out.println("--------------------------------------");  
                // 列印響應狀態    
                //System.out.println(response.getStatusLine());  
                if (entity != null) { 
                	return EntityUtils.toString(entity,Charset.forName("UTF-8"));
                }
                //System.out.println("------------------------------------");  
            } finally {  
                response.close();
                
            }
        } finally {  
            // 關閉連線,釋放資源    
            try {  
                httpclient.close();  
            } catch (IOException e) {  
                e.printStackTrace();  
            }  
        }
        return null;  
    }
 

String url = "xxxxxxx";
   String httpRes = null;
   String localFileName = "E:/2.jpg";
		
   Map<String,ContentBody> reqParam = new HashMap<String,ContentBody>();
   reqParam.put("Filename", new StringBody(localFileName, ContentType.MULTIPART_FORM_DATA));
   reqParam.put("pictitle", new StringBody(localFileName, ContentType.MULTIPART_FORM_DATA));
   reqParam.put("dir", new StringBody("upload1", ContentType.MULTIPART_FORM_DATA));
   reqParam.put("fileNameFormat", new StringBody("{time}{rand:6}", ContentType.MULTIPART_FORM_DATA));
   reqParam.put("fileName", new StringBody(localFileName, ContentType.MULTIPART_FORM_DATA));
   reqParam.put("fileName", new StringBody(localFileName, ContentType.MULTIPART_FORM_DATA));
   reqParam.put("upfile", new FileBody(new File(fileLocation)));
   reqParam.put("Upload", new StringBody("Submit Query", ContentType.MULTIPART_FORM_DATA));
		
   httpRes = HttpClientUtil.postFileMultiPart(url,reqParam);