如何在單個帖子中發送文件和數據？

Question

我使用HTTP的MIME庫從客戶端進行POST到服務器與多交送文件和數據

但我不知道如何與文件的單POST請求發送數據（PARAMS）

我用這作爲參考：http://vikaskanani.wordpress.com/2011/01/11/android-upload-image-or-file-using-http-post-multi-part/

Answer 1

我做了以下使用mime4j庫：

//Imports 
import org.apache.http.HttpResponse; 
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.MultipartEntity; 
import org.apache.http.entity.mime.content.FileBody; 
import org.apache.http.entity.mime.content.StringBody; 
import org.apache.http.impl.client.DefaultHttpClient; 
import org.apache.http.protocol.BasicHttpContext; 
import org.apache.http.protocol.HttpContext; 
import org.apache.james.mime4j.stream.NameValuePair; 

//Adding data 
    List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(); 
    nameValuePairs.add(new NameValuePair("caption", sCaption));// String 
    nameValuePairs.add(new NameValuePair("email", device_id));// String 
    nameValuePairs.add(new NameValuePair("uploadedfile", path));//File path 
    post(URLs.photoUpload, nameValuePairs);// Calling post function 

//post function 
    public void post(final String url, final List<NameValuePair> nameValuePairs) { 
     // Setting progressDialog properties 
     final ProgressDialog progressDialog = ProgressDialog.show(
       PhotoActivity.this, "", "Posting To Server..."); 

     final Handler mHandler = new Handler(); 
     // Function to run after thread 
     final Runnable mUpdateResults = new Runnable() { 
      public void run() { 

       if (server) { 
        server = false; 
        Toast.makeText(getBaseContext(), "Posted To Server!", 
          Toast.LENGTH_SHORT).show(); 
       } else { 
        Toast.makeText(getBaseContext(), "Error!", 
          Toast.LENGTH_SHORT).show(); 
       } 
      } 
     }; 
     new Thread() { 
      @Override 
      public void run() { 

       System.out.println("URL:::" + url); 
       System.out.println("SIZE:::" + nameValuePairs.size()); 
       // /////////////// 
       HttpClient httpClient = new DefaultHttpClient(); 
       HttpContext localContext = new BasicHttpContext(); 
       HttpPost httpPost = new HttpPost(url); 

       try { 
        MultipartEntity entity = new MultipartEntity(
          HttpMultipartMode.BROWSER_COMPATIBLE); 

        for (int index = 0; index < nameValuePairs.size(); index++) { 
         if (nameValuePairs.get(index).getName() 
           .equalsIgnoreCase("uploadedfile")) { 
          // If the key equals to "image", we use FileBody 
          // to transfer the data 
          entity.addPart(
            nameValuePairs.get(index).getName(), 
            new FileBody(new File(nameValuePairs.get(
              index).getValue()))); 
         } else { 
          // Normal string data 
          entity.addPart(nameValuePairs.get(index).getName(), 
            new StringBody(nameValuePairs.get(index) 
              .getValue())); 
         } 
        } 

        httpPost.setEntity(entity); 

        HttpResponse response = httpClient.execute(httpPost, 
          localContext); 
        System.out.println(response.toString()); 
        server = true; 
       } catch (IOException e) { 
        e.printStackTrace(); 
        server = false; 
       } 

       // dismiss the progress dialog 
       progressDialog.dismiss(); 
       // Calling handler's post function 
       mHandler.post(mUpdateResults); 

      } 
     }.start(); 

    }