UPLOAD FILE TO DROPBOX BY CALLING ITS WEBSERVICE IN JAVA

METHOD 1

USING ACCESS TOKEN GENERATED IN DROPBOX DEVELOPER WEBSITE

import java.io.BufferedReader;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStreamReader;

import java.util.Locale;

import com.dropbox.core.DbxAppInfo;

import com.dropbox.core.DbxAuthFinish;

import com.dropbox.core.DbxEntry;

import com.dropbox.core.DbxException;

import com.dropbox.core.DbxRequestConfig;

import com.dropbox.core.DbxClient;

import com.dropbox.core.DbxWebAuthNoRedirect;

import com.dropbox.core.DbxWriteMode;

public class Upload_Data

{

    private static final String ACCESS_TOKEN = "<ACCESS TOKEN>";

    public static void main(String args[]) throws DbxException, IOException {

        

        DbxRequestConfig config = new DbxRequestConfig(

            "JavaTutorial/1.0", Locale.getDefault().toString());

            

        //YOU CAN GET THIS ACCESS TOKEN FROM DROPBOX DEVELOPER WEBSITE     FOR YOUR APP       

       String accessToken="<aCCESSTOKEN>";

       DbxClient client = new DbxClient(config, accessToken);

        System.out.println("Linked account: " +client.getAccountInfo().displayName);

        File inputFile = new File("C:\\Users\\USER\\Desktop\\dat.txt");

        

        

        FileInputStream inputStream = new FileInputStream(inputFile);

        try 

        {

          client.delete("/dat.txt");

          System.out.println("DAT DELETED SUCCESSFULLY");

            DbxEntry.File uploadedFile = client.uploadFile("/dat.txt",

                DbxWriteMode.add(), inputFile.length(), inputStream);

            System.out.println("Uploaded: " + uploadedFile.toString());

        }   

        finally

        {

            inputStream.close();

            

        }

        FileOutputStream outputStream = new FileOutputStream("DAT.txt");

        try {

            DbxEntry.File downloadedFile = client.getFile("/DAT.txt", null,

                outputStream);

            

            System.out.println("Metadata: " + downloadedFile.toString());

        } 

        finally 

        {

            outputStream.close();

        }

      

        

    }

}

METHOD 2

USING ACCESS KEY AND SECRET KEY GENERATED IN DROPBOX DEVELOPER WEBSITE:

import java.io.BufferedReader;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStreamReader;

import java.util.Locale;

import com.dropbox.core.DbxAppInfo;

import com.dropbox.core.DbxAuthFinish;

import com.dropbox.core.DbxEntry;

import com.dropbox.core.DbxException;

import com.dropbox.core.DbxRequestConfig;

import com.dropbox.core.DbxClient;

import com.dropbox.core.DbxWebAuthNoRedirect;

import com.dropbox.core.DbxWriteMode;

public class Upload_Data

{

    private static final String ACCESS_TOKEN = "<ACCESS TOKEN>";

    public static void main(String args[]) throws DbxException, IOException {

        // Create Dropbox client

        //YOU CAN GET APP KEY AND SECRET KEY FOR YOUR APP IN DROPBOX   DEVELOPER.COM

     final String APP_KEY = "<APP KEY>";

        final String APP_SECRET = "SECRET KEY";

        DbxAppInfo appInfo = new DbxAppInfo(APP_KEY, APP_SECRET);

        DbxRequestConfig config = new DbxRequestConfig(

            "JavaTutorial/1.0", Locale.getDefault().toString());

       DbxWebAuthNoRedirect webAuth = new DbxWebAuthNoRedirect(config, appInfo);

       String authorizeUrl = webAuth.start();

      System.out.println("1. Go to: " + authorizeUrl);

       System.out.println("2. Click \"Allow\" (you might have to log in first)");

       System.out.println("3. Copy the authorization code.");

      String code = new BufferedReader(new InputStreamReader(System.in)).readLine().trim();

       System.out.println("Authen code.."+code);

       DbxAuthFinish authFinish = webAuth.finish(code);

        String accessToken = authFinish.accessToken;

             DbxClient client = new DbxClient(config, accessToken);

        System.out.println("Linked account: " +client.getAccountInfo().displayName);

        File inputFile = new File("C:\\Users\\USER\\Desktop\\dat.txt");

        

        

        FileInputStream inputStream = new FileInputStream(inputFile);

        try 

        {

          client.delete("/dat.txt");

          System.out.println("DAT DELETED SUCCESSFULLY");

            DbxEntry.File uploadedFile = client.uploadFile("/dat.txt",

                DbxWriteMode.add(), inputFile.length(), inputStream);

            System.out.println("Uploaded: " + uploadedFile.toString());

            

        }   

        finally

        {

            inputStream.close();

            

        }

        FileOutputStream outputStream = new FileOutputStream("DAT.txt");

        try {

            DbxEntry.File downloadedFile = client.getFile("/DAT.txt", null,

                outputStream);

            

            System.out.println("Metadata: " + downloadedFile.toString());

        } 

        finally 

        {

            outputStream.close();

        }

      

        

    }

}