Choose Your Language

Thursday, 20 June 2013

Multi language support web application using AJAX, Properties file

Project Structure


Step 1: Create a Web Application using netbean IDE

Step 2: Create 3 packages namely
2.a. com.mybean
2.b. com.resources
2.c. com.dao

Step 3: Create a Class Named MyBean under  com.mybean package


 package com.mybean;

/**
 *
 * @author Aravind Sankaran
 */

public class MyBean {
 private String firstName;
 private String middleName;
 private String lastName;  
 private String language;
 private String welcome;
 private boolean valid;
    public String getMiddleName() {
        return middleName;
    }

    public void setMiddleName(String middleName) {
        this.middleName = middleName;
    }
    public String getWelcome() {
        return welcome;
    }

    public void setWelcome(String welcome) {
        this.welcome = welcome;
    }

    public String getLanguage() {
        return language;
    }

    public void setLanguage(String language) {
        this.language = language;
    }
   
    public boolean isValid() {
        return valid;
    }

    public void setValid(boolean valid) {
        this.valid = valid;
    }

    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }
  
}




Step 4: Create two properties file config under  com.resources package with names en and ma
4.a. Right click  com.resources
4.b. New
4.c. properties file

paste below text on en.properties file

# To change this template, choose Tools | Templates
# and open the template in the editor.
welcome=Welcome
firstname=Aravind
middlename=Sankaran
lastname=Nair


paste below text on ma.properties file
# To change this template, choose Tools | Templates
# and open the template in the editor.
welcome=സ്വാഗതം
firstname=അരവിന്ദ്
middlename=ശങ്കരൻ
lastname=നായർ

Step 5: Create a Class Named LoadMyProperties under  com.dao package
paste the below text


package com.dao;

import com.mybean.MyBean;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

/**
 *
 * @author Aravind Sankaran
 */

public class LoadMyProperties {
    private Properties configProp = new Properties();
    public MyBean getMyPropertiesFile(MyBean myBean){        
       
        String lang=myBean.getLanguage();
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("com/resources/"+lang+".properties");
        System.out.println("property file selected is");
        System.out.println("com/resources/"+lang+".properties");
        try {
          configProp.load(in);
          String  firstname=configProp.getProperty("firstname");       
          String  lastname=configProp.getProperty("lastname");
          String welcome=configProp.getProperty("welcome");
          String middlename=configProp.getProperty("middlename");
          myBean.setFirstName(firstname);
          myBean.setMiddleName(middlename);
          myBean.setLastName(lastname);
          myBean.setWelcome(welcome);
         
          myBean.setValid(true);
        } catch (IOException e) {
            e.printStackTrace();
        }      
      
        return myBean;
    }
}
 


Step 5: Paste the below code in index.jsp file
<%--
    Document   : index
    Created on : 21 Jun, 2013, 12:42:38 AM
    Author     : Aravind Sankaran
--%>

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>JSP Page</title>
        <script type="text/javascript">
function loadXMLDoc()
{
var xmlhttp;
var e=document.getElementById("utype");
var str=e.options[e.selectedIndex].value;
var urls="myhome.jsp?lang="+str;

if (window.XMLHttpRequest)
  {
  xmlhttp=new XMLHttpRequest();
  }
else
  {
  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
xmlhttp.onreadystatechange=function()
  {
  if (xmlhttp.readyState==4)
    {
           document.getElementById("err").innerHTML=xmlhttp.responseText;

    }
  }
xmlhttp.open("GET",urls,true);
xmlhttp.send();
}
</script>

    </head>
    <body bgcolor="black">
        <center>
        <table>
            <tr>
                <td><font color="white">Choose Language</font></td>
                <td>
                    <select name="utype" id="utype" onchange="loadXMLDoc()">
                                                <option value="-select-">-select-</option>
                                                <option value="en">english</option>
                                                <option value="ma">malayalam</option>
                                               
                    </select>
                </td>
            </tr>
        </table>
        <span id="err"></span>
    </center>
    </body>
</html>
 
 

Step 6: Paste the below code in myhome.jsp file 
<%--
    Document   : myhome
    Created on : 21 Jun, 2013, 12:54:33 AM
    Author     : Aravind Sankaran
--%>

<%@page import="com.dao.LoadMyProperties"%>
<%@page import="com.mybean.MyBean"%>
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<% String lang=request.getParameter("lang");%>
<%!String welcome;%>
<%!String myFirstName;%>
<%!String myMiddleName;%>
<%!String myLastName;%>

        <%
        MyBean myBean=new MyBean();
        myBean.setLanguage(lang);
        LoadMyProperties loadMyProperties=new LoadMyProperties();
        myBean=loadMyProperties.getMyPropertiesFile(myBean);%>
        <% if (myBean.isValid()) {
            welcome=myBean.getWelcome();
            myFirstName=myBean.getFirstName();
            myMiddleName=myBean.getMiddleName();
            myLastName=myBean.getLastName();
        %>
       
        <% } else { %>
            <p> No data in properties file</p>
<% } %>
             
<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>JSP Page</title>
    </head>
    <body>
        <h1><font color="white"><%=welcome%>&nbsp;<%=myFirstName%>&nbsp;<%=myMiddleName%>&nbsp;<%=myLastName%></font></h1>
    </body>
</html>

Output
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