DashZin

Friday 2 August 2019

How to play videos in AngularJs just right of your table action play button

DashZin August 02, 2019

HTMP Page

<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<div class="row">
<div class="col-md-6">
<h2>Basic Table</h2>
<table class="table">
<thead>
<tr>
<th>Firstname</th>
<th>Lastname</th>
<th>Action</th>
</tr>
</thead>
<tbody>
<tr>
<td>John</td>
<td>Doe</td>
<td><button ng-click="playVideo(1)">Test</button></td>
</tr>
<tr>
<td>Mary</td>
<td>Moe</td>
<td><a ng-click="playVideo(2)">Test</a></td>
</tr>
<tr>
<td>July</td>
<td>Dooley</td>
<td>july@example.com</td>
</tr>
</tbody>
</table>

</div>

<div class="col-md-6">
<h3>View Content</h3>
<ui-view>
<ion-content style="background-color:white ; margin-top:0px;" ng-init="playVideo()" >
<div >
<video controls style="margin-left: 10%"; width="300";height="400"></video>
</div>
</ion_content>
</ui-view>
</div>
</div>
</body>
</html>

Js File

Module creating:-

Angular.module('app' ,,[]);

Configure UI-Router:-

app.config(function($stateProvider,$urlRouterProvider) {
$urlRouterProvider.otherwise('/nav');
$stateProvider
.state('nav.multipleview', {
url: '/multipleview',
templateUrl: 'App/multiple-view/multipleview.html',
controller:'multipleViewController'
})
});

Controller creating:-
app.controller('multipleViewController',['appService','$scope','$rootScope',function(appService,$scope,$rootScope){

$scope.playVideo = function(id) {
alert(id);
var vidURL = "http://clips.vorwaerts-gmbh.de/VfE_html5.mp4";
var myVideo = document.getElementsByTagName('video')[0];
myVideo.src = vidURL;
myVideo.load();
myVideo.play();
}

}]);

Thursday 1 August 2019

javaScripts

Timer with stop ans start button in JavaScripts

DashZin August 01, 2019

HTML Code :

JavaScripts Code :

tree view

DashZin July 31, 2019

<!DOCTYPE html>
<html>
<head>
<base href="https://demos.telerik.com/kendo-ui/treeview/checkboxes">
<style>html { font-size: 14px; font-family: Arial, Helvetica, sans-serif; }</style>
<title></title>
<link rel="stylesheet" href="https://kendo.cdn.telerik.com/2019.2.619/styles/kendo.common-material.min.css" />
<link rel="stylesheet" href="https://kendo.cdn.telerik.com/2019.2.619/styles/kendo.material.min.css" />
<link rel="stylesheet" href="https://kendo.cdn.telerik.com/2019.2.619/styles/kendo.material.mobile.min.css" />

<script src="https://kendo.cdn.telerik.com/2019.2.619/js/jquery.min.js"></script>
<script src="https://kendo.cdn.telerik.com/2019.2.619/js/kendo.all.min.js"></script>

</head>
<body>
<div id="example">

<div class="demo-section k-content">
<div>
<h4>Check nodes</h4>
<div id="treeview"></div>
</div>
<div style="padding-top: 2em;">
<h4>Status</h4>
<p id="result">No nodes checked.</p>
</div>
</div>

<script>
$("#treeview").kendoTreeView({
checkboxes: {
checkChildren: true
},

check: onCheck,

dataSource: [{
id: 1, text: "Ranchi", expanded: true, items: [
{ id: 2, text: "a" },
{ id: 3, text: "b" },
{ id: 4, text: "c"}

]
}]
});

// function that gathers IDs of checked nodes
function checkedNodeIds(nodes, checkedNodes) {
for (var i = 0; i < nodes.length; i++) {
if (nodes[i].checked) {
checkedNodes.push(nodes[i].id);
}

if (nodes[i].hasChildren) {
checkedNodeIds(nodes[i].children.view(), checkedNodes);
}
}
}

// show checked node IDs on datasource change
function onCheck() {
var checkedNodes = [],
treeView = $("#treeview").data("kendoTreeView"),
message;

checkedNodeIds(treeView.dataSource.view(), checkedNodes);

if (checkedNodes.length > 0) {
message = "IDs of checked nodes: " + checkedNodes.join(",");
} else {
message = "No nodes checked.";
}

$("#result").html(message);
}
</script>

<style>
#treeview .k-sprite {
background-image: url("../content/web/treeview/coloricons-sprite.png");
}

.rootfolder { background-position: 0 0; }
.folder { background-position: 0 -16px; }
.pdf { background-position: 0 -32px; }
.html { background-position: 0 -48px; }
.image { background-position: 0 -64px; }
</style>

</div>

</body>
</html>

AngularJS timer with start and stop button

DashZin July 31, 2019

//............timer...........................
//timer with interval
$scope.timerWithInterval = 0;
$scope.total;
$scope.startTimerWithInterval = function() {
$scope.timerWithInterval = 0;
if($scope.myInterval){
$interval.cancel($scope.myInterval);
}
$scope.onInterval = function(){
$scope.timerWithInterval++;
$scope.total=$scope.timerWithInterval;
}
$scope.myInterval = $interval($scope.onInterval,1000);

console.log("timerWithInterval",$scope.myInterval);
};

$scope.resetTimerWithInterval = function(){
var da=$filter('date')($scope.total,'hh:mm:ss');
console.log("$scope.da",$scope.total | hhmmss);
console.log("$scope.total",$scope.total);
$scope.timerWithInterval = 0;
$interval.cancel($scope.myInterval);
}

}]);
//....should outside of the controller..
app.filter('hhmmss', function () {
return function (time) {
var sec_num = parseInt(time, 10); // don't forget the second param
var hours = Math.floor(sec_num / 3600);
var minutes = Math.floor((sec_num - (hours * 3600)) / 60);
var seconds = sec_num - (hours * 3600) - (minutes * 60);

if (hours < 10) {hours = "0"+hours;}
if (minutes < 10) {minutes = "0"+minutes;}
if (seconds < 10) {seconds = "0"+seconds;}
var time = hours+':'+minutes+':'+seconds;
return time;
}
});

....html to start and stop timer
<p ng-bind="timerWithInterval">Timer with interval: {{timerWithInterval | hhmmss}}</p>
<button ng-click="startTimerWithInterval()">Start Timer</button>
<button ng-click="resetTimerWithInterval()">reset tiemr</button>

Tuesday 28 August 2018

AdvJava, Servlet

Servlet API

DashZin August 28, 2018

Servlet API consists of two important packages that encapsulates all the important classes and interface, namely :

ü javax.servlet : The javax.servlet package contains many interfaces and classes that are used by the servlet or web container. These are not specific to any protocol.
ü javax.servlet.http : The javax.servlet.http package contains interfaces and classes that are responsible for http requests only.

Some Important Classes And Interface of javax.servlet

INTERFACES

CLASSES

Servlet

ServletInputStream

ServletContext

ServletOutputStream

ServletConfig

ServletRequestWrapper

ServletRequest

ServletResponseWrapper

ServletResponse

ServletRequestEvent

ServletContextListener

ServletContextEvent

RequestDispatcher

ServletRequestAttributeEvent

SingleThreadModel

ServletContextAttributeEvent

Filter

ServletException

FilterConfig

UnavailableException

FilterChain

GenericServlet

ServletRequestListener

Some Important Classes And Interface of javax.servlet

CLASSES and INTERFACES
HttpServlet	HttpServletRequest
HttpServletResponse	HttpSessionAttributeListener
HttpSession	HttpSessionListener
Cookie	HttpSessionEvent

AdvJava, Servlet

Servlet Interface

DashZin August 28, 2018

Servlet interface provides common behaviour to all the servlets.

Servlet interface needs to be implemented for creating any servlet (either directly or indirectly). It provides 3 life cycle methods that are used to initialize the servlet, to service the requests, and to destroy the servlet and 2 non-life cycle methods.

Servlet Interface Method

There are 5 methods in Servlet interface. The init, service and destroy are the life cycle methods of servlet. These are invoked by the web container.

1. void destroy(): This method is called by Servlet container at the end of servlet life cycle. Unlike service() method that gets called multiple times during life cycle, this method is called only once by Servlet container during the complete life cycle. Once destroy() method is called the servlet container does not call the service() method for that servlet.

2. void init(ServletConfig config): When Servlet container starts up (that happens when the web server starts up) it loads all the servlets and instantiates them. After this init() method gets called for each instantiated servlet, this method initializes the servlet.

3. void service(ServletRequest req, ServletResponse res): This is the only method that is called multiple times during servlet life cycle. This methods serves the client request, it is called every time the server receives a request.

4. ServletConfig getServletConfig(): Returns a ServletConfig object, which contains initialization and startup parameters for this servlet.

5. java.lang.String getServletInfo(): Returns information about the servlet, such as author, version, and copyright.

Servlet Example by implementing Servlet interface

Let's see the simple example of servlet by implementing the servlet interface.

File : Dashzin.java

import java.io.*;

import javax.servlet.*;

public class Dashzin implements Servlet{

ServletConfig config=null;

public void init(ServletConfig config){

this.config=config;

System.out.println("servlet is initialized");

}

public void service(ServletRequest req,ServletResponse res)

throws IOException,ServletException{

res.setContentType("text/html");

PrintWriter out=res.getWriter();

out.print("<html><body>");

out.print("<b>hello simple servlet using servlet interface</b>");

out.print("</body></html>");

}

public void destroy(){

System.out.println("servlet is destroyed");

}

public ServletConfig getServletConfig(){

return config;

}

public String getServletInfo(){

return "Welcome to Dashzin Servlet Blog";

}

Wednesday 1 August 2018

AdvJava, Servlet

GenericServlet Class

DashZin August 01, 2018

The GenericServlet class implements the Servlet and ServletConfig interfaces. Since service () method is declared as an abstract method in GenericServlet class, it is an abstract class. The class extending this class must implement the service () method. It is used to create servlets which are protocol independent.

To understand the creation of servlets using the GenericServlet class, lets us consider a simple program given here. For this, two files will be required; one .java file in which servlet is defined and another. html file containing code for web page.

Pros of using Generic Servlet:1. Generic Servlet is easier to write
2. Has simple lifecycle methods
3. To write Generic Servlet you just need to extend javax.servlet.GenericServlet and override the service() method

Cons of using Generic Servlet:Working with Generic Servlet is not that easy because we don’t have convenience methods such as doGet(), doPost(), doHead() etc in Generic Servlet that we can use in Http Servlet.
In Http Servlet we need to override particular convenience method for particular request, for example if you need to get information then override doGet(), if you want to send information to server override doPost(). However in Generic Servlet we only override service() method for each type of request which is cumbersome.

Methods of GenericServlet class

There are many methods in GenericServlet class. They are as follows:

public void init(ServletConfig config) is used to initialize the servlet.
public abstract void service(ServletRequest request, ServletResponse response) provides service for the incoming request. It is invoked at each time when user requests for a servlet.
public void destroy() is invoked only once throughout the life cycle and indicates that servlet is being destroyed.
public ServletConfig getServletConfig() returns the object of ServletConfig.
public String getServletInfo() returns information about servlet such as writer, copyright, version etc.
public void init() it is a convenient method for the servlet programmers, now there is no need to call super.init(config)
public ServletContext getServletContext() returns the object of ServletContext.
public String getInitParameter(String name) returns the parameter value for the given parameter name.
public Enumeration getInitParameterNames() returns all the parameters defined in the web.xml file.
public String getServletName() returns the name of the servlet object.
public void log(String msg) writes the given message in the servlet log file.
public void log(String msg,Throwable t) writes the explanatory message in the servlet log file and a stack trace.

Example of GenericServlet Class

This servlet program is used to print "Hello World" on client browser using GenericServlet class.

HelloWorld.java

import java.io.IOException;

import java.io.PrintWriter;

import javax.servlet.GenericServlet;

import javax.servlet.ServletException;

import javax.servlet.ServletRequest;

import javax.servlet.ServletResponse;

/**

* This servlet program is used to print "Hello World" on

* client browser using GenericServlet class.

* @author javawithease

public class HelloWorld extends GenericServlet {

private static final long serialVersionUID = 1L;

//no-argument constructor.

public HelloWorld() {

}

@Override

public void service(ServletRequest request, ServletResponse response)

throws ServletException, IOException {

response.setContentType("text/html");

PrintWriter out = response.getWriter();

out.println("<h1>Hello World example using" +

" GenericServlet class.</h1>");

out.close();

}

Web.xml

<?xml version="1.0" encoding="UTF-8"?>

<web-app id="WebApp_ID" version="2.4"

xmlns="http://java.sun.com/xml/ns/j2ee"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee

http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

          <servlet>

                    <servlet-name>HelloWorld</servlet-name>

                    <servlet-class>

                       com.javawithease.business.HelloWorld

                    </servlet-class>

          </servlet>

          <servlet-mapping>

                    <servlet-name>HelloWorld</servlet-name>

                    <url-pattern>/HelloWorld</url-pattern>

          </servlet-mapping>

</web-app>

Output

DashZin

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Latest Posts

Friday 2 August 2019

How to play videos in AngularJs just right of your table action play button

Thursday 1 August 2019

Timer with stop ans start button in JavaScripts

Wednesday 31 July 2019

tree view

AngularJS timer with start and stop button

Tuesday 28 August 2018

Servlet API

Servlet Interface

Servlet Example by implementing Servlet interface

Wednesday 1 August 2018

GenericServlet Class

Methods of GenericServlet class

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INTERFACES	CLASSES
Servlet	ServletInputStream
ServletContext	ServletOutputStream
ServletConfig	ServletRequestWrapper
ServletRequest	ServletResponseWrapper
ServletResponse	ServletRequestEvent
ServletContextListener	ServletContextEvent
RequestDispatcher	ServletRequestAttributeEvent
SingleThreadModel	ServletContextAttributeEvent
Filter	ServletException
FilterConfig	UnavailableException
FilterChain	GenericServlet
ServletRequestListener