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/**
* 上传素材
* @author matao
* @date 2016年7月20日
*/
public static String uploadMedia(String uploadMediaUrl, MultipartFile file) throws IOException
{
String result = null;
HttpURLConnection con = (HttpURLConnection) new URL(uploadMediaUrl).openConnection();
// 以Post方式提交表单,默认get方式
con.setRequestMethod("POST");
// post方式不能使用缓存
con.setUseCaches(false);
con.setDoInput(true);
con.setDoOutput(true);
// 设置请求头信息
con.setRequestProperty("Connection", "Keep-Alive");
con.setRequestProperty("Charset", "UTF-8");
// 设置边界
String BOUNDARY = "----------" + System.currentTimeMillis();
con.setRequestProperty("Content-Type", "multipart/form-data; boundary="+ BOUNDARY);
// 请求正文信息
StringBuilder sb = new StringBuilder();
sb.append("--"); // 必须多两道线
sb.append(BOUNDARY);
sb.append("\r\n");
sb.append("Content-Disposition: form-data;name=\"media\";filename=\""+ file.getOriginalFilename() + "\" \r\n");
sb.append("Content-Type:application/octet-stream\r\n\r\n");
byte[] head = sb.toString().getBytes("utf-8");
// 获得输出流
OutputStream out = new DataOutputStream(con.getOutputStream());
// 输出表头
out.write(head);
// 把文件已流文件的方式 推入到url中
DataInputStream in = new DataInputStream(file.getInputStream());
int bytes = 0;
byte[] bufferOut = new byte[1024];
while ((bytes = in.read(bufferOut)) != -1)
{
out.write(bufferOut, 0, bytes);
}
in.close();
// 结尾部分
byte[] foot = ("\r\n--" + BOUNDARY + "--\r\n").getBytes("utf-8");// 定义最后数据分隔线
out.write(foot);
out.flush();
out.close();
StringBuffer buffer = new StringBuffer();
BufferedReader reader = null;
// 定义BufferedReader输入流来读取URL的响应
reader = new BufferedReader(new InputStreamReader(con.getInputStream()));
String line = null;
while ((line = reader.readLine()) != null)
{
buffer.append(line);
}
if (result == null)
{
result = buffer.toString();
}
return result;
}
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原文地址:http://www.cnblogs.com/Jmatao/p/5703124.html