本文實例講述了java實現分段讀取文件并通過HTTP上傳的方法。分享給大家供大家參考。具體如下：
1、首先將文件分段，用RandomAccessFile
2、分段后將分出的內容上傳到http
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URL url = new URL(actionUrl);HttpURLConnection con = (HttpURLConnection) url.openConnection();/** 允許Input、Output，不使用Cache */con.setDoInput(true);con.setDoOutput(true);con.setUseCaches(false);/** 設定傳送的method=POST */con.setRequestMethod("POST");/** setRequestProperty */con.setRequestProperty("Connection", "Keep-Alive");con.setRequestProperty("Charset", "UTF-8");con.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);/** 設定DataOutputStream */DataOutputStream ds = new DataOutputStream(con.getOutputStream());ds.writeBytes(twoHyphens + boundary + end);ds.writeBytes("Content-Disposition: form-data; " + "name=\"file1\";filename=\"" + newName + "\"" + end);ds.writeBytes(end);/** 取得文件的FileInputStream */FileInputStream fStream = new FileInputStream(uploadFile);/** 設定每次寫入1024bytes */int bufferSize = 1024;byte[] buffer = new byte[bufferSize];int length = -1;/** 從文件讀取數據到緩沖區 */while ((length = fStream.read(buffer)) != -1){/** 將數據寫入DataOutputStream中 */ds.write(buffer, 0, length);}ds.writeBytes(end);ds.writeBytes(twoHyphens + boundary + twoHyphens + end);/** close streams */fStream.close();ds.flush(); |
希望本文所述對大家的java程序設計有所幫助。
