Sunday, June 9, 2013

Differences between struts 1.x & struts 2.x


component and functional differences between struts 1.x  & struts 2.x

 In struts 1.x front controller is ActionServlet      In 2.x front controller is FilterDispatcher    In struts 1.x we have RequestProcessor class      In 2.x we have Interceptors instead RequestProcessor will see about this concept later just remember as of now    In struts 1.x we have multiple tag libraries like, html, logic, bean..etc      In 2.x we do not have multiple libraries, instead we have single library which includes all tags    In struts 1.x the configuration fine name can be [any name].xml and we used to place in web-inf folder      In 2.x the configuration file must be struts.xml only and this must be in classes folder    In struts 1.x we have form beans and Action classes separately      In 2.x form bean, Action classes are combinedly given as Action class only, of course we can take separately if we want ;)    In struts 1.x properties file must be configured in struts-config.xml      But in 2.x we need to configure our resource bundle(s) in struts.properties file    In struts 1.x we have programmatic and declarative validations only      In 2.x we have annotations support too along with programmatic and declarative validations

Functional Differences

In struts 1.x declarative validations are done by using validation frame work      In 2.x, declarative validations are done by using xwork2 frame work by webwork the reason being, its support valuations through Annotations    In struts 1.x an Action class is a single ton class, so Action class object is not a thread safe, as a programmer we need to make it as thread safe by applying synchronization      In 2.x an Action class object will be created for each request, so it is by default thread safe, so we no need to take care about safety issues here    In struts 1.x we have only jsp as a view technology      In 2.x we have support of multiple view technologies like velocity, Freemarker, jasper reports, jsp bla bla    In struts 1.x Action class is having servlet dependency, because in execute() method accepts req, res parameter right ! so.      In 2.x Action class doesn't have any servlet dependency, because its execute() method doesn't accepts any parameters, however we can access all servlet objects with dependency injection
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Sunday, March 17, 2013

Compressing and Decompressing String in Java example of Deflater and Inflater of java.util.zip packate.

Compressing and Decompressing String in Java, using Deflater and Inflater of java.util.zip packate.

================================================================================================


package com.test;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.zip.DataFormatException;
import java.util.zip.Deflater;
import java.util.zip.DeflaterOutputStream;
import java.util.zip.Inflater;

public class CompressFromJavaUtill {

    /**
     * @param args
     * @author laxman Guatam
     *    laxmangautam@gmail.com
     */
    public static void main(String[] args) {
        String emailContent = "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\">"
                + "<html><head>"
                + "<title>You're Invited to Oracle's OTN Developer Day!</title>"
                + "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=ISO-8859-1\">"
                + "</head><body>"
                + "<p>This DVD includes all the resources you need for the OTN Developer Day: Java Development</p>"
                + "<ul>"
                + "<li><a href=\"software/\">Required  Software</a> (see below)</li>"
                + "<li><a href=\"Std_materials/\">Hands on Lab Manuals and Source </a></li>"
                + "<li><a href=\"appliance/\">Virtual Box Appliance</a></li>"
                + "<li><a href=\"Readme_for_netbeans.doc\">NetBeans License Readme </a></li>"
                + "</ul>"
                + "<p><strong>Server Track - System Requirements </strong></p>"
                + "<p>Virtual Box  installation </p>" + "</body>";

        int length = emailContent.length();

        byte data[] = null;

        try {
            data = emailContent.getBytes("ISO-8859-1");
            ByteArrayOutputStream byteStream = new ByteArrayOutputStream();
            Deflater defaulterObj = new Deflater();
            DeflaterOutputStream deflter = new DeflaterOutputStream(byteStream,
                    defaulterObj);
            deflter.write(data);
            deflter.close();
            data = byteStream.toByteArray();
            byteStream.close();
            System.out.println(" Array data is " + data.toString());
            String newCompressedData = new String(data);
            System.out.println(" Orginal Content is " + emailContent);
            System.out.println(" Orginal Size is " + emailContent.length());
            System.out.println(" Compressed Content is  " + newCompressedData);
            System.out.println(" Compressed Content Size is  "
                    + newCompressedData.length());

            System.out.println("Decompressing now:::::::::::::::::::::::");

            byte[] output = new byte[length];
            Inflater decompresser = new Inflater();
            decompresser.setInput(data, 0, data.length);
            int resultNew = decompresser.inflate(output);

            System.out.println("Out put is " + resultNew);

            String orginalText = new String(output);
            System.out.println(" Orginal Content is " + orginalText);

            System.out.println(" Is it equal. "
                    + orginalText.equals(emailContent));

        } catch (UnsupportedEncodingException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (DataFormatException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }

}
===============================Out Put will be:=================================================

 Array data is [B@3e25a5
 Orginal Content is <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><html><head><title>You're Invited to Oracle's OTN Developer Day!</title><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"></head><body><p>This DVD includes all the resources you need for the OTN Developer Day: Java Development</p><ul><li><a href="software/">Required  Software</a> (see below)</li><li><a href="Std_materials/">Hands on Lab Manuals and Source </a></li><li><a href="appliance/">Virtual Box Appliance</a></li><li><a href="Readme_for_netbeans.doc">NetBeans License Readme </a></li></ul><p><strong>Server Track - System Requirements </strong></p><p>Virtual Box  installation </p></body>
 Orginal Size is 681
 
Compressed Content is  xœmRaoÓ0ý+·||È ¤®%ÚLZQ×NKÚ§ÊM®Ä±ƒ}é–Ϲ餡ñÅÒ=ß{~÷Îò¬Ø,ª‡Û+¸®nVpûc¾Z. Ë…øùa!DQÓÅÇ‹wPí¢!ã?¶B\­3%[ê,Ÿ¨%É?Eõà‡ó€°tCØ......

Decompressing now:::::::::::::::::::::::
Out put is 681
 Orginal Content is <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><html><head><title>You're Invited to Oracle's OTN Developer Day!</title><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"></head><body><p>This DVD includes all the resources you need for the OTN Developer Day: Java Development</p><ul><li><a href="software/">Required  Software</a> (see below)</li><li><a href="Std_materials/">Hands on Lab Manuals and Source </a></li><li><a href="appliance/">Virtual Box Appliance</a></li><li><a href="Readme_for_netbeans.doc">NetBeans License Readme </a></li></ul><p><strong>Server Track - System Requirements </strong></p><p>Virtual Box  installation </p></body>
 Is it equal. true



























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