java实现分段读取文件并通过HTTP上传的方法

本文实例讲述了java实现分段读取文件并通过HTTP上传的方法。分享给大家供大家参考。具体如下：

1、首先将文件分段，用RandomAccessFile
2、分段后将分出的内容上传到http

URL url = new URL(actionUrl);
HttpURLConnection con = (HttpURLConnection) url.openConnection();

con.setDoInput(true);
con.setDoOutput(true);
con.setUseCaches(false);

con.setRequestMethod("POST");

con.setRequestProperty("Connection", "Keep-Alive");
con.setRequestProperty("Charset", "UTF-8");
con.setRequestProperty("Content-Type",
 "multipart/form-data;boundary=" + boundary);

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);

FileInputStream fStream = new FileInputStream(uploadFile);

int bufferSize = 1024;
byte[] buffer = new byte[bufferSize];
int length = -1;

while ((length = fStream.read(buffer)) != -1)
{

ds.write(buffer, 0, length);
}
ds.writeBytes(end);
ds.writeBytes(twoHyphens + boundary + twoHyphens + end);

fStream.close();
ds.flush();

希望本文所述对大家的java程序设计有所帮助。