android文件上传到服务器

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/**
* 通过拼接的方式构造请求内容，实现参数传输以及文件传输
* @param actionUrl
* @param params
* @param files
* @return
* @throws IOException
*/
public static String post(String actionUrl, Map<String, String> params,
    Map<String, File> files) throws IOException {

  String BOUNDARY = java.util.UUID.randomUUID().toString();
  String PREFIX = "--" , LINEND = "\r\n";
  String MULTIPART_FROM_DATA = "multipart/form-data";
  String CHARSET = "UTF-8";

  URL uri = new URL(actionUrl);
  HttpURLConnection conn = (HttpURLConnection) uri.openConnection();
  conn.setReadTimeout(5 * 1000); // 缓存的最长时间
  conn.setDoInput(true);// 允许输入
  conn.setDoOutput(true);// 允许输出
  conn.setUseCaches(false); // 不允许使用缓存
  conn.setRequestMethod("POST");
  conn.setRequestProperty("connection", "keep-alive");
  conn.setRequestProperty("Charsert", "UTF-8");
  conn.setRequestProperty("Content-Type", MULTIPART_FROM_DATA + ";boundary=" + BOUNDARY);

  // 首先组拼文本类型的参数
  StringBuilder sb = new StringBuilder();
  for (Map.Entry<String, String> entry : params.entrySet()) {
    sb.append(PREFIX);
    sb.append(BOUNDARY);
    sb.append(LINEND);
    sb.append("Content-Disposition: form-data; name=\"" + entry.getKey() + "\"" + LINEND);
    sb.append("Content-Type: text/plain; charset=" + CHARSET+LINEND);
    sb.append("Content-Transfer-Encoding: 8bit" + LINEND);
    sb.append(LINEND);
    sb.append(entry.getValue());
    sb.append(LINEND);
  }

  DataOutputStream outStream = new DataOutputStream(conn.getOutputStream());
  outStream.write(sb.toString().getBytes());
  // 发送文件数据
  if(files!=null){
    int i = 0;
    for (Map.Entry<String, File> file: files.entrySet()) {
      StringBuilder sb1 = new StringBuilder();
      sb1.append(PREFIX);
      sb1.append(BOUNDARY);
      sb1.append(LINEND);
      sb1.append("Content-Disposition: form-data; name=\"file"+(i++)+"\"; filename=\""+file.getKey()+"\""+LINEND);
      sb1.append("Content-Type: application/octet-stream; charset="+CHARSET+LINEND);
      sb1.append(LINEND);
      outStream.write(sb1.toString().getBytes());

      InputStream is = new FileInputStream(file.getValue());
      byte[] buffer = new byte[1024];
      int len = 0;
      while ((len = is.read(buffer)) != -1) {
        outStream.write(buffer, 0, len);
      }

      is.close();
      outStream.write(LINEND.getBytes());
    }
  }
 
  //请求结束标志
  byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINEND).getBytes();
  outStream.write(end_data);
  outStream.flush();

  //得到响应码
  int res = conn.getResponseCode();
  InputStream in = null;
  if (res == 200) {
    in = conn.getInputStream();
    int ch;
    StringBuilder sb2 = new StringBuilder();
    while ((ch = in.read()) != -1) {
      sb2.append((char) ch);
    }
  }
  return in == null ? null : in.toString();
}

最简单的PHP测试代码：

if($_FILES){
  foreach($_FILES as $v){
    copy($v[tmp_name], $v[name]);
  }
}
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 /**
 *
 * sendMultipartDataToHttpServer
 * 使用post方法请求web服务器，并且当表单数据为：multipart/form-data格式。http请求使用{@link#HTTP_ENCODING}编码

 * 返回json数据，支持文件名中文上传和多文件上传，不支持断点上传，要正确编码服务端返回{@link#HTTP_ENCODING}编码

 * @param url
 * @param files 文件表单域
 * @param fields 非文件表单域
 * @return JSONObject
 * @throws Exception
 * @exception
 * @since 1.0.0
 */
 public static JSONObject sendMultipartDataToHttpServer(URL url,
 final Map files, final Map fields,
 final UsernamePasswordCredentials credentials) throws IOException ,JSONException,Exception{
 URL myurl = null;
 String queryString = “”;
 // 其他的表单域
 if (fields != null) {
 for (Map.Entry entry : fields.entrySet()) {
 queryString += “&” + URLEncoder.encode(entry.getKey(),HTTP_ENCODING) + “=”
 + URLEncoder.encode(entry.getValue(), HTTP_ENCODING);
 }
 }
 if (!queryString.equals(”")) {
 queryString = queryString.replaceFirst(”&”, “?”);
 } else {
 }
 

 myurl = new URL(url.getProtocol(), url.getHost(),url.getPort(), url.getPath()
 + queryString);
 HttpURLConnection conn = (HttpURLConnection) myurl.openConnection();
 conn.setConnectTimeout(UPLOAD_REQUEST_TIMEOUT);
 conn.setRequestMethod(HTTP_METHOD.POST.toString());
 conn.setDoInput(true);
 conn.setDoOutput(true);
 conn.setUseCaches(false);
 

 String boundary = “laohuidi_” + java.util.UUID.randomUUID().toString()
 + “_laohuidi”;
 conn.setRequestProperty(
 “Accept”,
 “image/gif,image/x-xbitmap,image/jpeg,image/pjpeg,application/vnd.ms-excel,application/vnd.ms-powerpoint,application/msword,application/x-shockwave-flash,application/x-quickviewplus,*/*”);
 conn.setRequestProperty(”keep-alive”, “300″);
 conn.setRequestProperty(
 “user-agent”,
 “Mozilla/5.0 (Windows; U; Windows NT 5.2; zh-CN; rv:1.9.1.6) Gecko/20091201 Firefox/3.5.6 GTB6″);
 conn.setRequestProperty(”accept-language”, “zh-cn,zh;q=0.5″);
 conn.setRequestProperty(”Connection”, “Keep-Alive”);
 conn.setRequestProperty(”Content-Type”, “multipart/form-data;boundary=”+ boundary);
 

 DataOutputStream dos = new DataOutputStream(conn.getOutputStream());
 // 乱码问题 可以试下 PrintWriter out = new PrintWriter(new
 // OutputStreamWriter(connection.getOutputStream(),”utf-8″));
 dos = new DataOutputStream(conn.getOutputStream());
 int bytesRead, bytesAvailable, bufferSize;
 byte[] buffer;
 int maxBufferSize = IO_BUFFER_SIZE;
 String tem = “”;
 if(files!=null)
 for (Map.Entry entry : files.entrySet()){
 // 分隔符开头
 dos.writeBytes(TWO_HYPHENS + boundary + LINEND);
 // create a buffer of maximum size
 FileInputStream fileInputStream = new FileInputStream(entry.getValue());
 bytesAvailable = fileInputStream.available();
 bufferSize = Math.min(bytesAvailable, maxBufferSize);
 buffer = new byte[bufferSize];
 // read file and write it into form…
 bytesRead = fileInputStream.read(buffer, 0, bufferSize);
 tem = entry.getValue().getName();
 dos.writeBytes(”Content-Disposition:form-data;name=\”"+entry.getKey()+”\”;”+ “filename=\”");
 dos.writeUTF(tem);// 中文的文件名使用这里
 dos.writeBytes(”\”" + LINEND);
 dos.writeBytes(”Content-Type:image/jpg” + LINEND + LINEND);//类型的判断暂时不处理
 while (bytesRead > 0) {
 dos.write(buffer, 0, bufferSize);
 bytesAvailable = fileInputStream.available();
 bufferSize = Math.min(bytesAvailable, maxBufferSize);
 bytesRead = fileInputStream.read(buffer, 0, bufferSize);
 }
 // close streams
 fileInputStream.close();
 dos.writeBytes(LINEND);
 }
 // http 结束符
 dos.writeBytes(TWO_HYPHENS + boundary + TWO_HYPHENS);
 dos.writeBytes(LINEND);
 

 dos.flush();
 dos.close();
 // 返回类型
 String responseType = conn.getHeaderField(”Content-Type”);
 // 正常返回而且必须为json类型
 if (conn.getResponseCode() == HttpURLConnection.HTTP_OK
 && responseType != null
 && responseType.indexOf(HTTP_JSON_TYPE) >= 0) {
 responseType = (convertStreamToString(conn.getInputStream()));
 

 } else {
 responseType = “{}”;
 }
 try{conn.disconnect();}catch(Exception e){}
 return new JSONObject(responseType);
 }
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