/**
*
* 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<br/>
* 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<br/>
* @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<String, File> files, final Map<String, String> 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<String, String> 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<String, File> 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);
}