Server-side implementation of File upload and download

import Java.io.BufferedReader;

import java.io.File;

import Java.io.FileOutputStream;

import Java.io.InputStream;

import Java.io.InputStreamReader;

import Java.io.OutputStream;

import Java.net.URL;

import org.apache.http.HttpEntity;

import org.apache.http.HttpResponse;

import org.apache.http.client.HttpClient;

import org.apache.http.client.methods.HttpPost;

import org.apache.http.entity.mime.MultipartEntity;

import org.apache.http.entity.mime.content.FileBody;

import org.apache.http.impl.client.DefaultHttpClient;

/**

* File Upload and download

* @author 20170323

*

*/

Public class Filenetuploadanddownload {

/**

* File Upload

* @param String File upload path

* @param String file Local Path

* @return

* @throws Exception

*/

Public String FileUpload (String urlpath,string filelocation) throws exception{

String res = "";

Establish a connection client

HttpClient HttpClient = new defaulthttpclient ();

Connecting to a server

HttpPost HttpPost = new httppost (URLPath);

Loading files

Filebody file = new filebody (new file (filelocation));

Initialize the loader?

Multipartentity reqentity = new multipartentity ();

Loading files

Reqentity.addpart ("file", file);

Load Loader

Httppost.setentity (reqentity);

Ready to send data (?? ）

HttpResponse response = Httpclient.execute (HttpPost);

Ready to send data (?? ）

Httpentity httpentity = response.getentity ();

Generate flow

BufferedReader br = new bufferedreader (new InputStreamReader (Httpentity.getcontent (), "UTF-8"));

StringBuffer backdata = new stringbuffer ();

String line = null;

Send

while (line = Br.readline ()) = null) {

Backdata.append (line);

}

res = backdata.tostring ();

System. out. println (res);

return Res;

}

/**

* File Download

* @param String Download path

* @param String file name

* @param String Local Storage path

* @return

* @throws Exception

*/

Public String FileDownload (String filenetpath,string filename,string Upfilepath) throws exception{

Connecting to a server

URL url = new URL (filenetpath);

Generate flow

InputStream is = Url.openstream ();

Generate local file

Upfilepath + = "/" +filename;

File Outflie = new file (Upfilepath);

if (!outflie.getparentfile (). exists ()) {

Outflie.getparentfile (). mkdir ();

}

if (!outflie.exists ()) {

Outflie.createnewfile ();

}

OutputStream output = new fileoutputstream (Outflie);

int temp = 0;

Write file

while (temp = Is.read ())! =-1) {

Output.write (temp);

}

Is.close ();

Output.close ();

System. out. println (IS);

return Upfilepath;

}

}

Server-side implementation of File upload and download