Month: July 2017

Array to CSV in Java

by

July 11, 2017

8:49 am

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Java

 

package com.demo;

import java.io.IOException;
import com.csvreader.CsvWriter;

public class ArrayToCSVDemo {

  public static void main(String[] args) {
    
    String array[] = {"Suryanagar, Vikhroli", "Java", "SQL", "13"};
    
    try {
      
      CsvWriter writer = new CsvWriter("awesomefile.csv");
      
      writer.writeRecord(array);
      
      writer.close();
      
    } catch (IOException e) {

      e.printStackTrace();
    }
    
  }

}

Reference Link: http://www.journaldev.com/12014/opencsv-csvreader-csvwriter-example

Jar File: http://www.java2s.com/Code/Jar/j/Downloadjavacsvjar.htm

Using FileWriter class

import java.io.FileWriter;

public class TestFileWriter {

  public static String implodeString(String[] split) {
    StringBuilder sb = new StringBuilder();
    for (int i = 0; i < split.length; i++) {			
        sb.append(split[i]);
        if (i != split.length - 1) {
            sb.append("\",\"");
        }
    }
    return "\"" . concat(sb.toString()) .concat("\"");
  }
  
  public static void main(String[] args) {
    
    String array[] = {"Suryanagar, Vikhroli", "Java", "SQL", "13"};
    
    try {
      
      FileWriter fw = new FileWriter("testout.csv");
      //fw.write("\"Suryanagar, Vikhroli\", Java, SQL, 13");
      fw.write(implodeString(array));
      fw.close();
    } catch (Exception e) {
      System.out.println(e);
    }

    System.out.println("Success...");

  }

}

 

 

Hello World django

by

July 7, 2017

1:07 pm

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Python

Here are simple steps to create hello world web application in python using django framework

  1. Step 1: Install virtual environment and create virtual environment for your project 
    pip install virtualenvwrapper-win

    mkvirtualenv myproject
  2. pip install virtualenv
  3. virtualenv name_to_your_env

  4. name_to_your_env\Scripts\activate
  5. After activation 

$ django-admin.py startproject HelloWorld  $ cd HelloWorld 
$ ls HelloWorld manage.py
  6. $ python manage.py runserver 
Validating models... 
0 errors found ... 
Django version 1.6.5, using settings 'HelloWorld.settings' 
Starting development server at http://127.0.0.1:8000/ 
Quit the server with CONTROL-C.
  7. $ django-admin startapp HelloWorldApp
    $ ls
    HelloWorld HelloWorldApp manage.py
  8. edit settings.py under HelloWorld project directory
    # Application definition
    INSTALLED_APPS = ( ‘django.contrib.admin’,
    ‘django.contrib.auth’,
    ‘django.contrib.contenttypes’,
    ‘django.contrib.sessions’,
    ‘django.contrib.messages’,
    ‘django.contrib.staticfiles’,
    ‘HelloWorldApp’, )
  9. modify the urls.py which is under the project directory, HelloWorld 
    from django.conf.urls import patterns, include, url 
from HelloWorldApp.views import foo 

#from django.contrib import admin 
#admin.autodiscover() 

urlpatterns = patterns('', 
# Examples: 
# url(r'^$', 'HelloWorld.views.home', name='home'), 
# url(r'^blog/', include('blog.urls')), 
#url(r'^admin/', include(admin.site.urls)), 
url(r'HelloWorldApp/$', foo), 
)
  10. modify views.py under app directory, HelloWorldApp 
    # Create your views here. 
from django.http import HttpResponse 
def foo(request): 
    return HttpResponse("Hello World!")
  11. Run the server 
    python manage.py runserver

     

  12. Hit this URL on browser
    http://localhost:8000/HelloWorldApp/

 

Ref Links:

  • https://docs.djangoproject.com/en/1.11/howto/windows/
  • http://www.bogotobogo.com/python/Django/Python_Django_hello_world.php
  • https://stackoverflow.com/questions/18684231/python-setup-command-not-found
  • https://stackoverflow.com/questions/8074955/cannot-import-name-patterns
  • https://scotch.io/tutorials/build-your-first-python-and-django-application
  • http://jinja.pocoo.org/docs/2.10/templates/