这段代码有什么问题，它给出了错误 [英] what is wrong with this code it gives error

问题描述

谁能告诉我这段代码有什么问题，它返回语法错误的错误.任何人都可以修复它吗?

can anyone tell me that what is wrong with this code it returns the error of syntax error. can anyone fix it ?

dos.writeBytes(twoHyphens + boundary + lineEnd); 
dos.writeBytes("Content-Disposition: form-data; name="uploaded_file";filename=""
+ fileName + """ + lineEnd);'

它的第二部分在 catch 它返回错误.请检查这个:

and its second part at catch it returns error. check this one please:

runOnUiThread(new Runnable() {
public void run() {
String msg = "File Upload Completed.

 See uploaded file here : 

"
             +http://www.androidexample.com/media/uploads/"
             +uploadFileName;
messageText.setText(msg);
Toast.makeText(UploadToServer.this, "File Upload Complete.",Toast.LENGTH_SHORT).show();
      }
    });                
  }    
fileInputStream.close();
dos.flush();
dos.close();
} catch (MalformedURLException ex) {
  dialog.dismiss();  
  ex.printStackTrace();
runOnUiThread(new Runnable() {
 public void run() {
 messageText.setText("MalformedURLException Exception : check script url.");
 Toast.makeText(UploadToServer.this, "MalformedURLException",Toast.LENGTH_SHORT).show();

 }
 });
 Log.e("Upload file to server", "error: " + ex.getMessage(), ex);  
 } catch (Exception e) {
 dialog.dismiss();  
 e.printStackTrace();
 runOnUiThread(new Runnable() {
 public void run() {
  messageText.setText("Got Exception : see logcat ");
  Toast.makeText(UploadToServer.this, "Got Exception : see logcat ",Toast.LENGTH_SHORT).show();
  }});
 Log.e("Upload file to server Exception", "Exception : " + e.getMessage(), e);  
  }
  dialog.dismiss();       
  return serverResponseCode;              
 } // End else block
} 
}
 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
 getMenuInflater().inflate(R.menu.upload_to_server, menu);
 return true;
 }
}

推荐答案

 dos.writeBytes("Content-Disposition: form-data; name="uploaded_file";"filename=""+ fileName + """ + lineEnd);

双引号内不使用双引号，需要加上"(反斜杠)

double qoutes are not used within double qoutes, you need to put "" (backslash)

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