JSP, Tomcat, JDBC, Projects, Example, Program » JSP

Building a User Registration Application

admin — Sun, 05 Dec 2010 08:11:59 +0000

User Registration is basic need of any web application. This tutorial will give you a rough idea to create user sign in application. This user registration application can be easily integrated with any existing old application. User Registration is developed on Struts framework and follow MVC pattern. Application is containing three packages actions, model and util. actions package contains all those class which are action class of struts and formbean actionform classes. Model package contain all those classes which are used for logical part and business part. Util package contain only those classes to give helping to application, e.g. Database connection classes, closing object classes and properties file.

Steps to Create user Registration application

UserRegisterForm.java

package com.register.actions;

import org.apache.struts.validator.ValidatorForm;

public class UserRegisterForm extends ValidatorForm{

    private static final long serialVersionUID = 1L;

    private String emailid;
    private String password;
    private String cpassword;
    private String firstname;
    private String lastname;
    private String gender;
    private String submitError;

    public String getSubmitError() {
        return submitError;
    }
    public void setSubmitError(String submitError) {
        this.submitError = submitError;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public String getEmailid() {
        return emailid;
    }
    public void setEmailid(String emailid) {
        this.emailid = emailid;
    }
    public String getCpassword() {
        return cpassword;
    }
    public void setCpassword(String cpassword) {
        this.cpassword = cpassword;
    }
    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;
    }
    public String getGender() {
        return gender;
    }
    public void setGender(String gender) {
        this.gender = gender;
    }
}

UserRegistrationAction.java

package com.register.actions;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;

import com.register.model.UserRegistration;

public class UserRegistrationAction extends Action {

    public ActionForward execute(ActionMapping mapping, ActionForm form,
            HttpServletRequest request, HttpServletResponse response)
            throws Exception {

        boolean action_perform = false;
        String action_target;

        UserRegistration u = new UserRegistration();

        ActionMessages errors_mesg = new ActionMessages();

        UserRegisterForm uf = (UserRegisterForm) form;

        if (form != null) {
            u.setEmail(uf.getEmailid());
            u.setPassword(uf.getPassword());
            u.setFirstName(uf.getFirstname());
            u.setLastName(uf.getLastname());
            u.setGender(uf.getGender());
            action_perform = u.newuserregistration();

            String sError=u.getDbError();
            if(sError.equalsIgnoreCase("error"))
            {
                errors_mesg.add("submitError",
                    new ActionMessage("errors.user.registration.email.duplicate"));
                saveErrors(request,errors_mesg);
            }
        }

        if (action_perform == false) {
            errors_mesg.add("submitError",
                    new ActionMessage("errors.user.registration.fail"));
            saveErrors(request, errors_mesg);
            action_target = "failure";
        } else {
            errors_mesg.add("submitError",
                    new ActionMessage("errors.user.registration.success"));
            saveErrors(request, errors_mesg);
            action_target = "success";
        }

        return mapping.findForward(action_target);
    }
}

User.java

package com.register.model;

import java.io.Serializable;
import java.util.Date;

public class User implements Serializable{

    private static final long serialVersionUID = 1L;

    private int id;
    private int level;
    private String password;
    private String cpassword;
    private String forgetpassword;
    private Date lastVisit;
    private Date registrationDate;
    private String email;
    private String webSite;
    private String occupation;
    private String gender;
    private String timeZone;
    private String dateFormat;
    private int active;
    private String activationKey;
    private int deleted;
    private String firstName;
    private String lastName;
    private String ipAddress;
    private String macAddress;
    private int failLoginAttempted;
    private String dbError="";
    public String getActivationKey() {
        return activationKey;
    }
    public void setActivationKey(String activationKey) {
        this.activationKey = activationKey;
    }
    public int getActive() {
        return active;
    }
    public void setActive(int active) {
        this.active = active;
    }
    public String getDateFormat() {
        return dateFormat;
    }
    public void setDateFormat(String dateFormat) {
        this.dateFormat = dateFormat;
    }
    public int getDeleted() {
        return deleted;
    }
    public void setDeleted(int deleted) {
        this.deleted = deleted;
    }
    public String getEmail() {
        return email;
    }
    public void setEmail(String email) {
        this.email = email;
    }
    public int getFailLoginAttempted() {
        return failLoginAttempted;
    }
    public void setFailLoginAttempted(int failLoginAttempted) {
        this.failLoginAttempted = failLoginAttempted;
    }
    public String getFirstName() {
        return firstName;
    }
    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }
    public String getGender() {
        return gender;
    }
    public void setGender(String gender) {
        this.gender = gender;
    }
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getIpAddress() {
        return ipAddress;
    }
    public void setIpAddress(String ipAddress) {
        this.ipAddress = ipAddress;
    }
    public String getLastName() {
        return lastName;
    }
    public void setLastName(String lastName) {
        this.lastName = lastName;
    }
    public Date getLastVisit() {
        return lastVisit;
    }
    public void setLastVisit(Date lastVisit) {
        this.lastVisit = lastVisit;
    }
    public int getLevel() {
        return level;
    }
    public void setLevel(int level) {
        this.level = level;
    }
    public String getMacAddress() {
        return macAddress;
    }
    public void setMacAddress(String macAddress) {
        this.macAddress = macAddress;
    }
    public String getOccupation() {
        return occupation;
    }
    public void setOccupation(String occupation) {
        this.occupation = occupation;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public Date getRegistrationDate() {
        return registrationDate;
    }
    public void setRegistrationDate(Date registrationDate) {
        this.registrationDate = registrationDate;
    }
    public String getTimeZone() {
        return timeZone;
    }
    public void setTimeZone(String timeZone) {
        this.timeZone = timeZone;
    }
    public String getWebSite() {
        return webSite;
    }
    public void setWebSite(String webSite) {
        this.webSite = webSite;
    }
    public String getForgetpassword() {
        return forgetpassword;
    }
    public void setForgetpassword(String forgetpassword) {
        this.forgetpassword = forgetpassword;
    }
    public String getCpassword() {
        return cpassword;
    }
    public void setCpassword(String cpassword) {
        this.cpassword = cpassword;
    }
    public String getDbError() {
        return dbError;
    }
    public void setDbError(String dbError) {
        this.dbError = dbError;
    }

}

UserRegistration.java

package com.register.model;

import java.sql.Connection;
import java.sql.PreparedStatement;

import com.register.util.ConnectionUtils;
import com.register.util.DbUtils;

public class UserRegistration extends User{

    private static final long serialVersionUID = 1L;

    public boolean newuserregistration() throws Exception
    {
        PreparedStatement psUserRegistration = null;
        String sqlUserRegistration = null;

        boolean isRegistered = false;

        Connection conn = ConnectionUtils.getConnection();

        sqlUserRegistration = "insert into user_master(sEmail, sPassword, sFirstName," +
                              " sLastName, cGender, iUserType, sCreatedDate, cStatus)" +
                              " values(?,md5(?),?,?,?,1,sysdate(),'A')";

        try{
            psUserRegistration = conn.prepareStatement(sqlUserRegistration);
            psUserRegistration.setString(1, this.getEmail());
            psUserRegistration.setString(2, this.getPassword());
            psUserRegistration.setString(3, this.getFirstName());
            psUserRegistration.setString(4, this.getLastName());
            psUserRegistration.setString(5, this.getGender());
            psUserRegistration.executeUpdate();

            isRegistered=true;
        }
        catch(Exception e)
        {
            String errorMessage=e.getMessage();
            e.printStackTrace();
            if(errorMessage.indexOf("Duplicate entry")>=0)
            {
                this.setDbError("error");
            }
            isRegistered=false;
            e.printStackTrace();
        }
        DbUtils.close(psUserRegistration, conn);

        return isRegistered;
    }
}

ConnectionUtils.java

package com.register.util;

import java.sql.Connection;
import java.sql.DriverManager;

import org.apache.struts.util.MessageResources;

public class ConnectionUtils {

    private static MessageResources messages
     = MessageResources.getMessageResources("com.register.util.ApplicationResources");
    private static String USER_NAME_DB=messages.getMessage("db.user");
    private static String USER_PASSWORD_DB=messages.getMessage("db.password");
    private static String DB_NAME=messages.getMessage("db.dbname");
    private static String HOST_NAME=messages.getMessage("db.host");

    static{
          try {
                 Class.forName("com.mysql.jdbc.Driver").newInstance();
          } catch (Exception ex) {
          }
    }

    public static Connection getConnection() throws Exception
    {
           return getDBConnection();
    }

     public static Connection getDBConnection() throws Exception
      {
          Connection conn = null;
          String URL="jdbc:mysql://"+HOST_NAME+":3306/"+DB_NAME;
          try{
              conn = DriverManager.getConnection(URL,USER_NAME_DB, USER_PASSWORD_DB);
          }
          catch(Exception e)
          {
              e.printStackTrace();
          }

          return conn;
      }
}

DbUtils.java

package com.register.util;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class DbUtils {

    public static void close(ResultSet rs, Statement stm)
    {
        if (rs != null) {
            try {
                rs.close();
            }
            catch (Exception e) { }
        }

        if (stm != null) {
            try {
                stm.close();
            }
            catch (Exception e) { }
        }
    }

    public static void close(ResultSet rs, Statement stm, Connection conn)
    {
        if (rs != null) {
            try {
                rs.close();
            }
            catch (Exception e) { }
        }

        if (stm != null) {
            try {
                stm.close();
            }
            catch (Exception e) { }
        }

        if (conn != null) {
            try {
                conn.close();
            }
            catch (SQLException e) { }
        }
    }

    public static void close(PreparedStatement ps, Connection conn)
    {
        if (ps != null) {
            try {
                ps.close();
            }
            catch (Exception e) { }
        }

        if (conn != null) {
            try {
                conn.close();
            }
            catch (SQLException e) { }
        }
    }

    public static void close(ResultSet rs)
    {
        if (rs != null) {
            try {
                rs.close();
            }
            catch (Exception e) { }
        }
    }

    public static void close(Statement stm)
    {
        if (stm != null) {
            try {
                stm.close();
            }
            catch (SQLException e) { }
        }
    }

    public static void close(Connection conn)
    {
        if (conn != null) {
            try {
                conn.close();
            }
            catch (SQLException e) { }
        }
    }
}

struts-config.xml file is used for struts configuration. This xml file contains all details of application in struts form value action mapping

struts-config.xml

DOCTYPE struts-config PUBLIC  "-//Apache Software Foundation//DTD Struts Configuration 1.3//EN"
          "http://struts.apache.org/dtds/struts-config_1_3.dtd">

    <struts-config>

        <form-beans>
            <form-bean name="registerform" type="com.register.actions.UserRegisterForm"/>
        form-beans>

        <action-mappings>
            <action
                path="/doRegister"
                type="com.register.actions.UserRegistrationAction"
                name="registerform"
                scope="request"
                validate="true"
                input="input">
                <forward name="input" path="/index.jsp"/>
                <forward name="success" path="/welcome.jsp"/>
                <forward name="failure" path="/index.jsp"/>
            action>

        action-mappings>

        <controller inputForward="true" />
        <message-resources parameter="com.register.util.ApplicationResources"/>
        <plug-in className="org.apache.struts.validator.ValidatorPlugIn">
        <set-property property="pathnames"
                      value="/org/apache/struts/validator/validator-rules.xml,
                              /WEB-INF/validation.xml"/>
                      <set-property property="stopOnFirstError" value="true" />
        plug-in>
    struts-config>

validation.xml is used for checking validate form value, if form is not validated properly it will throw error on user form.

validation.xml

<form-validation>

  <formset>
        <form name="registerform">
           <field property="emailid" depends="required,email">
            <msg name="required" key="errors.user.registration.email"/>
            <msg name="email" key="errors.user.registration.email.valid"/>
           field>
           <field property="password" depends="required">
            <msg name="required" key="errors.user.registration.password"/>
           field>
           <field property="cpassword" depends="required,validwhen">
            <msg name="required" key="errors.user.registration.password.confirm"/>
            <msg name="validwhen" key="errors.user.registration.password.match" />
               <var>
                  <var-name>testvar-name>
                  <var-value>(password==cpassword)var-value>
               var>
           field>
           <field property="firstname" depends="required">
            <msg name="required" key="errors.user.registration.first.name"/>
           field>
           <field property="lastname" depends="required">
            <msg name="required" key="errors.user.registration.last.name"/>
           field>
           <field property="gender" depends="required">
            <msg name="required" key="errors.user.registration.gender"/>
           field>
           <field property="submitError" depends="validwhen">
             <msg name="validwhen" key="errors.user.registration.fail" />
           <var>
              <var-name>testvar-name>
               <var-value>((emailid!=null) and ((password!=null) and ((cpassword!=null) and ((firstname!=null) and ((lastname!=null) and (gender!=null))))))var-value>
           var>
          field>
        form>
  formset>

form-validation>

ApplicationResources.properties file is used for configuration and error

ApplicationResources.properties

button.register=Register

# Database configuration setting
db.user=root
db.password=
db.host=localhost
db.dbname=reg_app

# errors

errors.user.registration.first.name=First Name cannot left empty
errors.user.registration.last.name=Last Name cannot left empty
errors.user.registration.password=Password cannot left empty
errors.user.registration.password.confirm=Confirm Password cannot left empty
errors.user.registration.password.match=Password & Confirm password is not matched
errors.user.registration.email=Email cannot left empty
errors.user.registration.email.valid=Enter Valid Email ID e.g. myemailid@gmail.com
errors.user.registration.email.duplicate=Duplicate Email Found
errors.user.registration.gender=Select Gender

errors.user.registration.fail=Error found while registration user
errors.user.registration.success=Thank you for registration

Database table user_master

CREATE TABLE `user_master` (
  `iUID` int(10) unsigned NOT NULL auto_increment,
  `sEmail` varchar(255) default NULL,
  `sPassword` varchar(45) NOT NULL,
  `sFirstName` varchar(45) default NULL,
  `sLastName` varchar(45) default NULL,
  `cGender` char(1) default NULL,
  `iUserType` int(10) unsigned default NULL,
  `sForgetPassword` varchar(45) default NULL,
  `sCreatedDate` datetime default NULL,
  `sLastLogin` datetime default NULL,
  `cStatus` char(1) default NULL,
  PRIMARY KEY  (`iUID`),
  UNIQUE KEY `sEmail` (`sEmail`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;

JSP files
index.jsp

<%@ page contentType="text/html; charset=iso-8859-1" language="java" %>
<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %>
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %>

<html:html lang="true">
<head>
<title>User Registration Applicationtitle>
head>

<body>
<html:errors property="submitError"/>

<html:form action="doRegister">
        Email: <html:text property="emailid" /> <html:errors property="emailid"/><br>
        Password: <html:password property="password" /> <html:errors property="password"/><br>
        Confirm Password: <html:password property="cpassword" /> <html:errors property="cpassword"/><br>
        First Name: <html:text property="firstname" /> <html:errors property="firstname"/><br>
        Last Name: <html:text property="lastname" /> <html:errors property="lastname"/><br>
        Gender: <html:select property="gender">
        <html:option value="">Select Genderhtml:option>
        <html:option value="M">Malehtml:option>
        <html:option value="F">Femalehtml:option>
        html:select>
        <html:errors property="gender"/><br>
        <html:submit><bean:message key="button.register"/>html:submit>
html:form>
body>
html:html>

welcome.jsp

<%@ page contentType="text/html; charset=iso-8859-1" language="java" %>
<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %>
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %>
<html>
<head>
<title>Welcome Registered successfullytitle>
head>

<body>
<html:errors property="submitError"/>
body>
html>

2. Deploy project in tomcat or jBoss

3. Run application in browser

Download User Registration application

Java – Run ssh commands in linux

admin — Sun, 20 Dec 2009 10:50:46 +0000

To execute ssh command in Linux, we need to use java API to run command at Unix machine. java ssh API is required to run linux commands through ssh with user Authentication.

This example will explain how to execute ssh in java.

Download ganymed ssh jar and set classpath before running program

import java.io.*;
import ch.ethz.ssh2.*;
public class JavaRunSshCommandExample {

    public static void main(String[] args) {

        String hostname = "127.0.0.1";
        String username = "root";
        String password = "password";

        boolean isAuthenticated = false;

        try
        {
            Connection conn = new Connection(hostname);

            conn.connect();

            isAuthenticated=conn.authenticateWithPassword(username, password);

            if (isAuthenticated == false)
                throw new IOException("Authentication failed.");

            Session sess = conn.openSession();

            sess.execCommand("cd /;ls -l> out.txt");

            InputStream stdout = new StreamGobbler(sess.getStdout());
            InputStream stderr = new StreamGobbler(sess.getStderr());

            InputStreamReader insrout=new InputStreamReader(stdout);
            InputStreamReader insrerr=new InputStreamReader(stderr);

            BufferedReader stdoutReader = new BufferedReader(insrout);

            BufferedReader stderrReader = new BufferedReader(insrerr);

            while (true)
            {
                String line = stdoutReader.readLine();
                if (line == null)
                {
                    break;
                }
                System.out.println(line);
            }

            while (true)
            {
                String line = stderrReader.readLine();
                if (line == null)
                {    break;}
                System.out.println(line);
            }

            sess.close();

            conn.close();
        }
        catch (IOException e)
        {
            e.printStackTrace(System.err);
            System.exit(2);
        }
    }
}

Other java ssh api

Download j2ssh api

JAVA – Read XML Taglib and JSTL in JSP

admin — Mon, 07 Dec 2009 10:43:07 +0000

XML Reading through JSTL tag and taglib library is very easy. We have to include JSTL libraries and it allows us to access XML through node.

Java XML Read fetching example explains how to use XML in JSP.

samle.xml

 
 
   
     New Delhi, India 
     3:30 PM 
   
   
     75 
     
       29.94 
       steady

xml_read.jsp

<%@ page contentType="text/html; charset=iso-8859-1" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>

<%@ taglib prefix="x" uri="http://java.sun.com/jsp/jstl/xml" %>
<c:import url="http://localhost:8080/XML/samle.xml" var="xml"/>
<x:parse xml="${xml}" varDom="dom"/>
<html>
<head>
<title>Read XML through taglib JSTLtitle>
head>

<body>
      <x:forEach select="$dom/weather/cc/tmp" var="tmp">
        <x:out select="$tmp" />
    x:forEach>

    <br>

    <x:forEach select="$dom/weather/cc/bar/d" var="d">
        <x:out select="$d" />
    x:forEach>
body>
html>

Output

75
steady

Download XML Read Source code download

Java – For loop Example, For loop program

admin — Sun, 27 Sep 2009 11:40:06 +0000

Example of For loop in java

public class ForLoopJava {

    public static void main(String[] args) {

        for(int i=0;i<=10;i++)
        {
            System.out.println("for loop :"+i);
        }
    }
}

output

for loop :0
for loop :1
for loop :2
for loop :3
for loop :4
for loop :5
for loop :6
for loop :7
for loop :8
for loop :9
for loop :10

Free Real Estate Source Code

admin — Thu, 21 May 2009 09:31:43 +0000

Web based real estate

Real estate software is web based and designed on java technology. Coding is written in JSP, JavaScript, HTML, CSS, with MySql database.

Real estate property source code

Source code of real estate project is available freely. Source code of real estate

Real estate source code download

Source code of real estate is available freely for download. Download real estate

Java – How to escape String

admin — Thu, 21 May 2009 06:36:48 +0000

String in HTML should not contain special characters. If String contains special character, it should escape string using StringEscapeUtil class.
This class can escape special characters from String. Final string comes with HTML code.

Download apache commons api

import org.apache.commons.lang.StringEscapeUtils;

public class EscapeString {

    public static void main(String[] args) {

        String str=" tag's value  \"into\" html & tag";

        String escapedString=StringEscapeUtils.escapeHtml(str);

        System.out.println(escapedString);
    }
}

Output

<HTML> tag’s value "into" html text & tag

Tomcat – How to change port 8080

admin — Wed, 20 May 2009 05:48:20 +0000

Default port of tomcat is 8080, this port can be changed to any other port. Normally HTTP port is 80, tomcat port can change through server.xml in config folder of tomcat.

How to change tomcat port 8080

c:\tomcat\conf\server.xml

Search for this line

connectionTimeout="20000"
redirectPort="8443" />

Change to 8080 to your desire port Number

connectionTimeout="20000"
redirectPort="8443" />

After modification in server.xml file, tomcat must be restarted.

JSP Calendar

admin — Sun, 17 May 2009 09:53:34 +0000

This JSP calendar can easily work with any java web application. This is free JSP calendar software for download and use. If you want to use calendar in your application you can use this calendar in JSP application. In this calendar, we can change year and month to go back and forward to option of calendar. Value of year and month in calendar can be changed by in combo box code.

<%@ page  language="java" import="java.util.*,java.text.*"%>
<%!
public int nullIntconv(String inv)
{   
    int conv=0;
        
    try{
        conv=Integer.parseInt(inv);
    }
    catch(Exception e)
    {}
    return conv;
}
%>
<%
 int iYear=nullIntconv(request.getParameter("iYear"));
 int iMonth=nullIntconv(request.getParameter("iMonth"));

 Calendar ca = new GregorianCalendar();
 int iTDay=ca.get(Calendar.DATE);
 int iTYear=ca.get(Calendar.YEAR);
 int iTMonth=ca.get(Calendar.MONTH);

 if(iYear==0)
 {
      iYear=iTYear;
      iMonth=iTMonth;
 }

 GregorianCalendar cal = new GregorianCalendar (iYear, iMonth, 1); 

 int days=cal.getActualMaximum(Calendar.DAY_OF_MONTH);
 int weekStartDay=cal.get(Calendar.DAY_OF_WEEK);
 
 cal = new GregorianCalendar (iYear, iMonth, days); 
 int iTotalweeks=cal.get(Calendar.WEEK_OF_MONTH);
  
%>
<html>
<head>
<title>How to create Calendar in JSPtitle>
<script>
function goTo()
{
  document.frm.submit()
}
script>
<style>
body
{
 font-family:Verdana, Arial, Helvetica, sans-serif
}
.dsb
{
 background-color:#EEEEEE
}
style>
head>

<body>
<form name="frm" method="post">
<table width="100%" border="0" cellspacing="0" cellpadding="0">
  <tr>
    <td width="25%">&nbsp;td>
    <td width="45%">&nbsp;td>
    <td width="30%">&nbsp;td>
  tr>
  <tr>
    <td>&nbsp;td>
    <td><table width="100%" border="0" cellspacing="0" cellpadding="0">
  <tr>
    <td><table width="100%" border="0" cellspacing="0" cellpadding="0">
      <tr>
        <td width="6%">Yeartd>
        <td width="7%">
        <select name="iYear" onChange="goTo()">
        <%
        // start year and end year in combo box to change year in calendar
        for(int iy=iTYear-70;iy<=iTYear+70;iy++)
        {
          if(iy==iYear)
          {
            %>
          <option value="<%=iy%>" selected="selected"><%=iy%>option>
          <%
          }
          else
          {
            %>
          <option value="<%=iy%>"><%=iy%>option>
          <%
          }
        }
       %>
        select>td>
        <td width="73%" align="center" style="color:#4E96DE"><h3><%=new SimpleDateFormat("MMMM").format(new Date(2008,iMonth,01))%> <%=iYear%>h3>td>
        <td width="6%">Monthtd>
        <td width="8%">
        <select name="iMonth" onChange="goTo()">
        <%
        // print month in combo box to change month in calendar
        for(int im=0;im<=11;im++)
        {
          if(im==iMonth)
          {
         %>
          <option value="<%=im%>" selected="selected"><%=new SimpleDateFormat("MMMM").format(new Date(2008,im,01))%>option>
          <%
          }
          else
          {
            %>
          <option value="<%=im%>"><%=new SimpleDateFormat("MMMM").format(new Date(2008,im,01))%>option>
          <%
          }
        }
       %>
        select>td>
      tr>
    table>td>
  tr>
  <tr>
    <td><table align="center" border="1" cellpadding="3" cellspacing="0" width="100%">
      <tbody>
        <tr>
          <th>Sunth>
          <th>Month>
          <th>Tueth>
          <th>Wedth>
          <th>Thuth>
          <th>Frith>
          <th>Satth>
        tr>
        <%
        int cnt =1;
        for(int i=1;i<=iTotalweeks;i++)
        {
        %>
        <tr>
          <% 
            for(int j=1;j<=7;j++)
            {
                if(cnt<weekStartDay || (cnt-weekStartDay+1)>days)
                {
                 %>
                <td align="center" height="35" class="dsb">&nbsp;td>
               <% 
                }
                else
                {
                 %>
                <td align="center" height="35" id="day_<%=(cnt-weekStartDay+1)%>"><span><%=(cnt-weekStartDay+1)%>span>td>
               <% 
                }
                cnt++;
              }
            %>
        tr>
        <% 
        }
        %>
      tbody>
    table>td>
  tr>
table>td>
    <td>&nbsp;td>
  tr>
  <tr>
    <td>&nbsp;td>
    <td>&nbsp;td>
    <td>&nbsp;td>
  tr>
table>
form>
body>
html>

Download source code JSP Calendar

How to compare date in JAVA

admin — Wed, 13 May 2009 10:11:42 +0000

Date is an important part of application. Comparing date in java is easy option with java.util.Date class method. Date can be compared with two date object of java. compareTo() method is used to compare date.

compareTo() method returns 3 option in numeric value.

Return 0, means dates are equal
Return 1, if first date is greater than second date
Return -1, if first date is less than second date

Example of comparing date in JSP

<%@ page language="java" import="java.util.*" %>
<%
  java.util.Date date1=new java.util.Date("05/21/2009");
  java.util.Date date2=new java.util.Date("05/21/2009");
%>
<html>
  <head>
    <title>How to compare date in javatitle>
  head>
  <body>
  <%
   out.println("date1 :"+date1);
   out.print("
");
   out.println("date2 :"+date2);
   out.print("
");
   out.println(date1.compareTo(date2));
   
   if(date1.compareTo(date2)<0)
   {
       // return -1 if date1 is less than date2
       out.println("
1. Date1 is less than date2");  
   }
   else if(date1.compareTo(date2)>0)
   {
       // return 1 if date1 is greater than date2
       out.println("
1. Date1 is greater than date2");  
   }
   else
   {
       // return 0 if date1 is equal to date2
       out.println("
1. Date1 is equal to date2");  
   }
   
   /// other ways to comparing date
   if(date1.after(date2))
   {
       //  if date1 is greater than date2
       out.println("
2. Date1 is greater than date2");
   }
   else if(date1.before(date2))
   {
       // if date1 is less than date2
       out.println("
2. Date1 is less than date2");   
   }
   else if(date1.equals(date2))
   {
       // if date1 is equal to date2
       out.println("
2. Date1 is equal to date2");  
   }
  %>
  body>
html>

How to Find Operating System in JAVA

admin — Wed, 13 May 2009 06:55:23 +0000

Java can find operating system of the machine where java program is executing. getProperty() is a method which find the system properties of the computer. OS property returns a String name of operating system platform.
We can detect the various operating systems in java. This operating system can be Linux, Window, Mac and other server version.

Example to find operating System in JSP

<%@ page language="java"%>
<html>
<head>
<title>How to find Operating System in JSPtitle>
head>

<body>
<%
 // This will return operation system name
 out.println("Operating System :"+System.getProperty("os.name"));
%>
body>
html>

JSP, Tomcat, JDBC, Projects, Example, Program » JSP

Building a User Registration Application

Steps to Create user Registration application

Related Posts:

Java – Run ssh commands in linux

Related Posts:

JAVA – Read XML Taglib and JSTL in JSP

Related Posts:

Java – For loop Example, For loop program

Related Posts:

Free Real Estate Source Code

Web based real estate

Real estate property source code

Real estate source code download

Related Posts:

Java – How to escape String

Related Posts:

Tomcat – How to change port 8080

Related Posts:

JSP Calendar

Related Posts:

How to compare date in JAVA

Related Posts:

How to Find Operating System in JAVA

Related Posts: