Simply Basics: Login page using Spring & Hibernate

In this post we will see how to create a login page using spring 3 and Hibernate 3. Below is the screen shot of the directory structure.

As shown in the below screens create "LoginTab" table. For this example I am using Oracle as data base. After creating the table, enter username, password and access_mode of your choice.

Next step is to create a bean for the table "LoginTab". Create a class with as shown below. We need to mark the class as "@Entity" to state the class as entity.

File: com.ram.form.LoginTab

package com.ram.form;

import javax.persistence.Entity;
import javax.persistence.Id;

@Entity
public class LoginTab {
 @Id
 private String uname;
 private String password;
 private String access_mode;
 
 public String getUname() {
  return uname;
 }
 public void setUname(String uname) {
  this.uname = uname;
 }
 public String getPassword() {
  return password;
 }
 public void setPassword(String password) {
  this.password = password;
 }
 public String getAccess_mode() {
  return access_mode;
 }
 public void setAccess_mode(String access_mode) {
  this.access_mode = access_mode;
 }
 
}

Create a web.xml file as shown below. Note that the welcome-file is given as "callLogin.html". This is name is checked in the controller and the "LoginPage.jsp" will be displayed.

File: WEB-INF/web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xmlns="http://java.sun.com/xml/ns/javaee" 
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" 
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>Spring Login Page Example</display-name>
  <servlet>
    <servlet-name>dispatcher</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>dispatcher</servlet-name>
    <url-pattern>*.html</url-pattern>
  </servlet-mapping>
  <welcome-file-list>
    <welcome-file>callLogin.html</welcome-file>
  </welcome-file-list>
</web-app>

File: com.ram.controller.LoginController.java

package com.ram.controller;

import java.util.Iterator;
import java.util.List;
import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import com.ram.dao.LoginDaoImpl;
import com.ram.form.LoginTab;

@Controller
public class LoginController {
 
 @Autowired
 private LoginDaoImpl loginDaoImpl;
 
 @RequestMapping(value="/callLogin", method = RequestMethod.GET)
 public String callLogin(Map model){
  LoginTab LoginPage = new LoginTab();
  model.put("LoginPage", LoginPage);
  return "LoginPage";
 }
 
 @RequestMapping("/login")
 public String loginValidate(@ModelAttribute("loginTab") LoginTab loginTab, BindingResult result){
  boolean flag = false;
  
  List<LoginTab> users = loginDaoImpl.validateUser(loginTab);
  
  for(Iterator<LoginTab> it = users.iterator(); it.hasNext();){
   LoginTab login = it.next();
   if(login.getUname().equals(loginTab.getUname())){
    if(login.getPassword().equals(loginTab.getPassword())){
     flag = true;
    }
   }
  }
  
  if(flag==true){
   return "Success";
  }else{
   return "Error";
  }
 }
}

Lets create a dao class. In this class using the SessionFactory we will establish the connection, use the HQL to get the LoginTab table details.

File: com.ram.dao.LoginDaoImpl.java

package com.ram.dao;

import java.util.List;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import com.ram.form.LoginTab;

@Repository
public class LoginDaoImpl {
 
 @Autowired
 private SessionFactory sessionFactory;
 
 public List<LoginTab> validateUser(LoginTab loginTab){
  String hql = "from LoginTab where uname = '"+loginTab.getUname()+"'";
  return getSessionFactory().openSession().createQuery(hql).list();
 }

 public SessionFactory getSessionFactory() {
  return sessionFactory;
 }

 public void setSessionFactory(SessionFactory sessionFactory) {
  this.sessionFactory = sessionFactory;
 }
 
}

File: WEB-INF/dispatcher-servlet.xml

<?xml  version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xmlns:aop="http://www.springframework.org/schema/aop"
 xmlns:context="http://www.springframework.org/schema/context"
 xmlns:jee="http://www.springframework.org/schema/jee"
 xmlns:lang="http://www.springframework.org/schema/lang"
 xmlns:p="http://www.springframework.org/schema/p"
 xmlns:tx="http://www.springframework.org/schema/tx"
 xmlns:util="http://www.springframework.org/schema/util"
 xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
  http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
  http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee.xsd
  http://www.springframework.org/schema/lang http://www.springframework.org/schema/lang/spring-lang.xsd
  http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
  http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd">
 
    <context:annotation-config/>
 
    <context:component-scan base-package="com.ram"></context:component-scan>
    
    <bean id="jspViewResolver"
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
        <property name="prefix" value="/WEB-INF/jsp/" />
        <property name="suffix" value=".jsp" />
    </bean>
 
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
        <property name="driverClassName" value="oracle.jdbc.driver.OracleDriver"/>
        <property name="url" value="jdbc:oracle:thin:@localhost:1521:xe"/>
        <property name="username" value="hr"/>
        <property name="password" value="hr"/>
        <property name="initialSize" value="2"/>
        <property name="maxActive" value="5"/>
    </bean>
       
    <bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
    <property name="dataSource" ref="dataSource"/>
    <property name="packagesToScan" value="com.ram.form"></property>
      
   <property name="hibernateProperties">
        <props>
        <prop key="hibernate.dialect">org.hibernate.dialect.OracleDialect</prop>
        <prop key="hibernate.show_sql">true</prop>
             <prop key="hibernate.hbm2ddl.auto">update</prop>
        </props>
    </property>
    </bean>
 
</beans>

File: WEB-INF/jsp/LoginPage.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
 pageEncoding="ISO-8859-1"%>

<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" 
"http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>
<title>Spring Login Page</title>
</head>

<body>
 <center>
 <h3>Login Page</h3>

 <form:form action="login.html" commandName="LoginPage">

 <table>
  <tr>
  <td>User Name: <FONT color="red"><form:errors
     path="uname" /></FONT></td>
  <td><form:input path="uname" /></td>
  </tr>

  <tr>
  <td>Password: <FONT color="red"><form:errors
     path="password" /></FONT></td>
  <td><form:password path="password" /></td>
  </tr>
 </table>

 <p>
  <input type="submit" value="Submit" />
 </p>

 </form:form>

 </center>

</body>

</html>

File: WEB-INF/jsp/Success.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
 pageEncoding="ISO-8859-1"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>
<title>Spring Success Page</title>

</head>

<body>
 <center>
  <h4>Welcome to the application.</h4>
  <p>
   <a href="callLogin.html">Back</a>
  </p>
 </center>
</body>

</html>

File: WEB-INF/jsp/Error.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
 pageEncoding="ISO-8859-1"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>
<title>Spring Error Page</title>
</head>

<body>
 <center>
  <h4 style="color: red">Error page, please go back to login page
   and enter correct credentials</h4>

  <p>
   <a href="callLogin.html">Back</a>
  </p>

 </center>

</body>

</html>

Right click on the "Spring_Hibernate_Login" directory structure and select "Run As -> Run on Server". Once the login page appears, enter the credentials to successfully login. If incorrect credentials are given, then error page will be thrown.

Login page using Spring & Hibernate

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